Progress in the R&D of Bio-based Synthetic Fiber Fabrics: Applications of Sustainable Materials

Progress in R&D of Bio-based Chemical Fiber Fabrics: Applications of Sustainable Materials

Under the profound guidance of global "Dual Carbon" goals and sustainable development philosophies, the traditional textile industry—which relies on a development model centered on petroleum-based synthetic fibers—faces the dual challenges of resource depletion and environmental carrying capacity constraints. Bio-based chemical fiber fabrics, utilizing renewable biomass as raw material, possess core advantages such as eco-friendly sourcing, low-carbon production, and product biodegradability; thus, they have emerged as a pivotal pathway for driving the green transformation of the textile industry. In recent years, driven by continuous breakthroughs in biotechnology and spinning techniques, the R&D of bio-based chemical fiber fabrics has transitioned from the laboratory to large-scale commercial application. The application scenarios for these sustainable materials are constantly expanding, establishing a comprehensive industrial chain development pattern characterized by "raw material innovation—technological breakthroughs—real-world application." This paper systematically reviews the evolutionary trajectory of R&D in bio-based chemical fiber fabrics and highlights key technological breakthroughs. It provides an in-depth analysis of the diverse application scenarios for these sustainable materials and explores the opportunities and challenges confronting the industry's development, thereby offering valuable insights to support the industry's high-quality growth.

I. Evolution of R&D in Bio-based Chemical Fiber Fabrics and Policy-Driven Development

The R&D of bio-based chemical fiber fabrics has undergone a transformative evolution, spanning from the modification of natural fibers to modern biological synthesis. This process has been accelerated by the dual drivers of supportive government policies and growing market demand, fostering rapid technological iteration and industrial implementation. Early-stage R&D in bio-based fibers focused primarily on the modification of natural fibers; this involved extracting cellulose from plant sources—such as wood and bamboo—using physical or chemical methods to produce regenerated cellulose fibers. While this approach successfully achieved raw material renewability, the production process still presented environmental shortcomings, such as a continued reliance on chemical reagents. With breakthroughs in synthetic biology technologies, the second generation of bio-based chemical fiber R&D shifted toward microbial fermentation pathways. This approach utilizes raw materials—such as sugars and starches—to synthesize polymer monomers, which are then processed through polymerization and spinning to create fibers. This shift has enabled the decarbonization of the production process while allowing for the precise control of product performance characteristics. In recent years, the third generation of bio-based chemical fiber technology has achieved further breakthroughs regarding raw material sourcing. Through techniques such as gene editing and enzymatic catalysis, non-food-based feedstocks—including agricultural waste and industrial exhaust gases—are now being converted into fiber raw materials, thereby further enhancing the overall sustainability of the process. At the policy level, targeted support and empowerment initiatives have provided a robust guarantee for the continued R&D and advancement of bio-based chemical fiber fabrics. On a global scale, the EU’s "Green Deal" explicitly mandates that by 2030, all textile products must be 100% recyclable or biodegradable; meanwhile, the U.S. "Biobased Products Preferred Procurement Program" requires the federal government to prioritize the procurement of biobased materials. Together, these initiatives have created a policy environment that compels the industry to undergo a transformative shift. At the domestic level, China’s "14th Five-Year Plan" designates biobased materials as a strategic emerging industry. Furthermore, the *Outline for the Development of the Textile Industry during the 14th Five-Year Plan Period*—issued by the Ministry of Industry and Information Technology (MIIT)—explicitly targets an average annual growth rate of over 20% for the output of biobased chemical fibers and biodegradable fiber materials by 2025, aiming to increase the share of "green fibers" to over 25% of total production. Local governments have also actively introduced supporting policies—such as special funds and tax incentives—to foster the growth of the biobased chemical fiber industry, thereby providing multifaceted support for R&D innovation and the successful commercialization of these technologies.

II. Core R&D Progress in Biobased Chemical Fiber Fabrics: Material Innovation and Technological Breakthroughs

Currently, core breakthroughs in the R&D of biobased chemical fiber fabrics are concentrated in three key areas: the diversification of raw materials, the greening of production processes, and the enhancement of product performance to premium standards. This focus has led to the formation of a core material system centered on biobased polyesters, biobased polyamides, polylactic acid (PLA), and seaweed fibers, with key technologies continuously achieving breakthroughs in industrial-scale application.

1. R&D Progress in Core Biobased Materials

Biobased polyester fabrics represent one of the most mature and widely applied categories currently undergoing R&D. While traditional petroleum-based polyester relies on petrochemical raw materials—specifically terephthalic acid and ethylene glycol—biobased polyester is synthesized by utilizing biological fermentation technologies to produce biobased monomers (such as 1,3-propanediol and furan dicarboxylic acid) that serve as substitutes for traditional petrochemical inputs. Notably, polyethylene furanoate (PEF) fabric—synthesized using furan dicarboxylic acid as a raw material—not only possesses strength, elasticity, and other performance characteristics comparable to traditional polyester but also exhibits superior barrier properties and biodegradability, demonstrating significant potential for application in sectors such as packaging and textiles. Currently, breakthroughs have been achieved in the continuous-production technology for biobased polyester; through independently developed production lines with a capacity of tens of thousands of tons, energy consumption and production costs have been substantially reduced, thereby paving the way for the large-scale commercial application of these products. Meanwhile, R&D efforts regarding biobased polyamide (nylon) fabrics are primarily focused on raw material substitution and performance optimization. Traditional nylon relies on petroleum-based hexamethylenediamine; in contrast, bio-based polyamides utilize bio-fermentation technology to convert plant-based raw materials into pentamethylenediamine. This intermediate is then subjected to a polycondensation process to produce bio-based nylon chips, which are subsequently spun into fibers to create fabrics. These fabrics not only eliminate the reliance on petrochemical resources but also possess excellent skin-friendliness, abrasion resistance, and cooling properties. Furthermore, through process optimization, they can be endowed with integrated functionalities such as moisture-wicking, quick-drying, and antimicrobial properties. Currently, significant breakthroughs have been achieved in the technology for preparing high-purity bio-based monomers, with purity levels exceeding 99.9%. This advancement guarantees stability in downstream spinning and weaving processes, and the resulting products have successfully obtained numerous international certifications for bio-based content and eco-textiles. Polylactic acid (PLA) fabrics have emerged as a key area of R&D focus, driven by their fully biodegradable nature. Produced from starch-rich crops—such as corn and cassava—via fermentation, polymerization, and spinning processes, PLA fibers yield fabrics that can completely degrade into carbon dioxide and water within natural environments, leaving behind no environmental residue. Current R&D efforts are primarily focused on addressing the inherent brittleness and limited heat resistance of PLA fibers. Through techniques such as blending modification and process optimization, researchers aim to enhance the softness and overall performance of these fabrics, thereby expanding their applications across sectors such as apparel and healthcare. Additionally, progress has been made in the development of novel bio-based materials, including seaweed fibers and chitosan fibers. Seaweed fibers, derived from marine biomass such as brown algae, naturally possess flame-retardant properties, offering distinct advantages in applications ranging from protective gear to marine interiors. Chitosan fibers, meanwhile, exhibit natural antimicrobial properties, making them ideally suited for use in medical dressings, infant clothing, and similar applications.

2. Breakthroughs in Key Production Technologies

Breakthroughs in the efficient preparation of bio-based monomers have laid a solid foundation for fabric R&D. By employing synthetic biology techniques to optimize microbial metabolic pathways, it is possible to significantly shorten the production cycle for bio-based monomers and reduce raw material consumption per unit of output. For instance, leveraging AI to design microbial metabolic pathways has enabled the reduction of the production cycle for bio-based propylene glycol from the 72 hours typically required by traditional fermentation to just 24 hours, thereby achieving a substantial increase in production efficiency. Meanwhile, significant breakthroughs have been achieved in technologies for the resource utilization of agricultural waste. Through pretreatment techniques utilizing complex cellulases, the conversion rate of agricultural residues—such as corn stalks—can be elevated to a high level, effectively transforming "waste into treasure." This advancement addresses long-standing sustainability concerns regarding bio-based raw materials, specifically the issues of "competing with humans for food" and "competing with food crops for land." Furthermore, optimized green spinning and weaving technologies have enhanced product quality. In the spinning stage, independently developed continuous production equipment has enabled the large-scale manufacturing of bio-based fibers. By incorporating energy-saving technologies—such as a five-effect evaporation waste heat recovery system—the specific steam consumption has been drastically reduced, thereby enhancing the low-carbon footprint of the production process. In the weaving stage, techniques involving profiled cross-sections and specialized thermal shrinkage processes have endowed fabrics with functional attributes such as a cooling sensation and rapid moisture absorption and drying capabilities. For instance, the combination of profiled cross-sections and the incorporation of high-thermal-conductivity materials can significantly enhance both the instantaneous and sustained cooling effects of a fabric, thereby meeting the specific demands of sports, outdoor activities, and similar scenarios. Finally, in the dyeing and finishing stage, the adoption of green processes—such as water-free dyeing and low-temperature dyeing—minimizes water consumption and pollutant emissions, thereby establishing a green, closed-loop system across the entire industrial value chain.

III. Diverse Application Scenarios for Sustainable Materials in Bio-based Chemical Fiber Fabrics

As R&D technologies mature and production costs decline, sustainable materials within bio-based chemical fiber fabrics have expanded their reach beyond the singular realm of apparel, penetrating into diverse sectors such as home textiles, medical supplies, and industrial applications. This expansion has fostered a diversified application landscape in which the green attributes and functional characteristics of these materials are precisely tailored to suit the specific requirements of each distinct scenario.

1. The Apparel Sector: Driving the Upgrade of Green Consumption

The apparel sector serves as the core application arena for bio-based chemical fiber fabrics; here, sustainable materials have emerged as the preferred raw materials for high-end clothing brands, distinguished by their eco-friendly credentials and superior performance characteristics. In the realm of sportswear, bio-based polyester and bio-based nylon fabrics—endowed with functionalities such as rapid moisture absorption and drying, cooling sensations, and antibacterial properties—are widely utilized in products ranging from yoga wear and running gear to sun-protective clothing. Through technical optimization, these fabrics can effectively lower body surface temperature by 2–3°C, thereby significantly enhancing the comfort experience during physical activity. In the casual wear sector, bio-based viscose fibers and polylactic acid (PLA) fabrics—characterized by their soft, skin-friendly texture and natural breathability—are employed in products such as T-shirts and dresses, effectively meeting consumer demand for healthy and eco-conscious apparel. In the realm of infant and toddler apparel, eco-certified bio-based fabrics have emerged as ideal materials for underwear and outerwear due to their non-irritating nature and high safety standards, thereby meeting parents' exacting demands for high-quality products for their children.

2. Home Textiles: Creating Green Living Environments

The application of sustainable materials in the home textiles sector focuses on health and environmental protection; bio-based chemical fiber fabrics are gradually replacing traditional petroleum-based fabrics, leveraging advantages such as softness, breathability, and biodegradability. In the bedding sector, products—such as sheets, duvet covers, and pillowcases—made from bio-based viscose and polylactic acid (PLA) fibers offer excellent moisture absorption and breathability. These properties inhibit bacterial growth and enhance sleep comfort; simultaneously, their biodegradable nature prevents home textile waste from polluting the environment. In the soft furnishings sector, bio-based polyester fabrics are utilized for products such as curtains and sofa covers. Through functional modifications—such as flame retardancy and stain resistance—these fabrics balance eco-friendliness with practical utility, aligning perfectly with the green interior design requirements of modern homes. The demand for renovations in the existing housing market, coupled with rising consumer environmental awareness, provides a stable foundation of demand for the application of bio-based chemical fiber fabrics within the home textiles sector.

3. Medical Applications: Highlighting Safety and Biodegradability

The medical field imposes rigorous standards regarding material safety and environmental impact; within this context, sustainable bio-based chemical fiber materials enable precise and specialized applications thanks to their unique properties. Polylactic acid (PLA) fibers can be manufactured into medical products such as absorbable surgical sutures and artificial organ scaffolds. These materials gradually degrade and are absorbed by the human body *in vivo*, thereby eliminating the need for follow-up surgeries to remove them and significantly reducing patient discomfort and the risk of infection. Chitosan fibers, possessing natural antimicrobial properties, can be fashioned into products such as medical dressings and surgical gowns. These materials effectively inhibit bacterial growth and minimize the risk of cross-infection, while their excellent biocompatibility actively promotes wound healing. Furthermore, bio-based protective fabrics are utilized in medical protective clothing; by maintaining robust barrier performance while simultaneously enhancing wearer comfort, these fabrics help alleviate fatigue among healthcare professionals.

4. Industrial Applications: Expanding into High-End Markets

The expansion of applications within the industrial sector represents a new growth frontier for bio-based chemical fiber fabrics, as these sustainable materials demonstrate exceptional adaptability in specialized and demanding environments. In the field of automotive interiors, bio-based polyester and nylon fabrics are utilized in components such as seats and door panels. Characterized by their eco-friendliness, odorless nature, abrasion resistance, and stain resistance, these materials effectively reduce in-cabin VOC emissions, thereby aligning with the environmental requirements of new energy vehicles. Furthermore, their lightweight properties contribute to enhancing a vehicle's driving range. In the realm of outdoor gear, bio-based fabrics are incorporated into products such as tents and sleeping bags; possessing a combination of lightweight design, high tensile strength, and biodegradability, they help minimize the environmental waste generated by outdoor adventure activities. In high-end sectors—such as marine interiors and aerospace—specialized bio-based fabrics, such as those derived from seaweed fiber, are displacing traditional materials. Leveraging unique properties—including natural flame retardancy and radiation resistance—these advanced materials are effectively expanding the boundaries of application.

IV. Challenges and Breakthrough Pathways in the R&D and Application of Bio-based Chemical Fiber Fabrics

Although significant progress has been made in the research and development of bio-based chemical fiber fabrics—and the application scenarios for sustainable materials continue to expand—the industry still faces several challenges. These include high production costs, unstable raw material supplies, and insufficient market awareness. Consequently, achieving breakthroughs requires a concerted effort involving technological innovation, supply chain collaboration, and market cultivation.

1. Core Challenges

Cost pressure constitutes the primary bottleneck hindering industrial-scale commercialization. The costs associated with raw materials and manufacturing processes for bio-based chemical fiber fabrics currently remain higher than those for traditional petroleum-based fabrics. While economies of scale and technological iterations have driven a gradual decline in costs, full price parity with traditional fabrics has not yet been achieved. Furthermore, the stability of raw material supply remains inadequate. Traditional bio-based raw materials rely heavily on food crops, rendering them highly susceptible to fluctuations in climate and market prices. Meanwhile, the systems for the collection, sorting, and pretreatment of alternative raw materials—such as agricultural waste and marine biomass—remain underdeveloped, thereby compromising the continuity of supply and the consistency of material quality. Market awareness also requires improvement; some brands and consumers lack a comprehensive understanding of the advantages offered by bio-based materials, and their acceptance regarding performance and pricing remains limited, creating certain difficulties for market promotion efforts. Additionally, the industry's regulatory and standardization framework is not yet fully mature; inconsistencies in standards—particularly regarding the verification of bio-based content and the evaluation of biodegradability—hinder effective product quality control and erode market trust.

2. Breakthrough Pathways

Technological innovation serves as the primary driver for cost reduction, while collaborative efforts across the entire supply chain are essential for optimizing cost structures. At the raw material stage, efforts will focus on intensifying R&D into technologies for the resource utilization of non-food feedstocks—such as agricultural waste and industrial exhaust gases—to reduce raw material costs. At the production stage, the adoption of continuous and intelligent manufacturing equipment will be promoted to enhance production efficiency while simultaneously lowering energy consumption and labor costs. In downstream applications, a comprehensive recycling system for bio-based fibers will be established; utilizing chemical depolymerization technologies to revert discarded garments back into their constituent monomers, this system will enable circular recycling and reduce overall costs. Policy and market forces will work in tandem to cultivate demand, employing measures such as government subsidies and tax incentives to alleviate the R&D and production pressures faced by enterprises. Industry associations and individual enterprises will intensify market education—through technical科普 (popular science outreach) and product experiential activities—to boost consumer awareness. Concurrently, they will encourage leading brands to expand their portfolios of bio-based products, thereby creating a powerful market demonstration effect. Furthermore, the standardization system and certification mechanisms will be refined and strengthened; this entails accelerating the formulation of classification standards for bio-based chemical fiber fabrics, standards for testing bio-based content, and criteria for evaluating biodegradability. By establishing an authoritative product certification system, the industry aims to regulate market order and bolster product credibility.

V. Future Development Trends for Bio-based Chemical Fiber Fabrics

Driven by the combined forces of supportive policies, technological innovation, and market demand, bio-based chemical fiber fabrics are poised to evolve in four key directions: diversification of raw materials, advancement of technology, specialization of application scenarios, and synergistic integration of the industrial chain. Consequently, both the depth and breadth of sustainable material applications are expected to expand continuously. The trend toward raw material diversification will become increasingly pronounced, with the proportion of non-food feedstocks gradually rising. Agricultural waste, marine biomass, and industrial exhaust gases will emerge as critical sources of raw materials, thereby definitively resolving the issue of "competing with food crops for land" and significantly enhancing the industry's overall sustainability. Regarding technological advancement, cutting-edge biotechnologies—such as gene editing and enzymatic catalysis—will be deeply integrated with fiber spinning technologies. This integration will enable the precise control of bio-based material properties, facilitating the development of high-performance fabrics endowed with multi-functional capabilities to meet the exacting demands of high-end sectors such as healthcare and aerospace. The specialization of application scenarios will drive product differentiation; tailored bio-based chemical fiber solutions will be developed to address the specific requirements of various fields—for instance, protective fabrics designed for extreme environments or sensor-embedded fabrics for smart wearable devices. Finally, synergistic integration across the industrial chain will become a dominant trend, fostering a complete circular ecosystem encompassing "raw material supply—R&D—manufacturing—end-use applications—recycling and reuse." Through collaborative innovation, upstream and downstream enterprises will work together to reduce costs and enhance efficiency, thereby propelling the industry toward high-quality, sustainable development. The advancements in the R&D of bio-based chemical fiber fabrics—along with the expanding scope of their application as sustainable materials—are profoundly reshaping the development landscape of the traditional textile industry, injecting powerful momentum into its green transformation. Spanning the spectrum from raw material innovation to technological breakthroughs, and from niche applications to widespread market penetration, bio-based chemical fiber fabrics have gradually evolved from a mere concept into a fully industrialized reality, emerging as a pivotal component within the global wave of sustainable development. Although the industry continues to grapple with multifaceted challenges—including issues related to costs, raw material sourcing, and market dynamics—the ongoing iteration of technologies, the continuous optimization of supply chains, and sustained policy support are poised to steadily bolster the market competitiveness of bio-based chemical fiber fabrics. In the future, these materials are expected to achieve price parity with traditional petroleum-based fabrics, thereby driving their widespread adoption across the textile sector. For enterprises within the industry, seizing the core opportunities presented by raw material innovation and technological breakthroughs—while simultaneously prioritizing scenario-specific applications and supply chain synergy—will be the key to realizing sustainable development. Looking ahead, bio-based chemical fiber fabrics—distinguished by their greener, more efficient, and superior qualities—are set to lead the textile industry into a new era of sustainable development, making a significant contribution toward the realization of global "dual carbon" goals.