Fiber Materials / Alfa Chemistry
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Natural Fiber

Natural fibers are textile fibers that are original in nature or directly obtained from artificially cultivated plants and animals, which are important sources of material for the textile industry. Alfa Chemistry offers a wide range of natural fiber materials, including plant fibers, animal fibers, chitin and chitosan fibers.


  • Plant Fiber
    Plant fibers refer to fibers extracted from natural plants, such as cotton, jute, flax, etc. The chemical composition of plant fiber mainly includes cellulose, lignin, hemicellulose and so on.
  • Animal Fiber
    Animal fibers are natural fibers mainly composed of certain proteins, such as wool, silk, etc.
  • Chitin and Chitosan Fibers
    Chitin has both the biological functions of collagen in higher animal tissues and fibrin in higher plant tissues, and has become a new material with a wide range of uses. Chitosan is the most important derivative of chitin.

Chitin and Chitosan Fibers

Fiber Modification

As green materials, natural fibers can provide environmentally friendly and sustainable solutions for the next generation of composite products. To meet the growing demand for using environmentally friendly materials in different applications, several modification and processing techniques are being researched and developed.

Physical Modification

Physical modification methods can be used to alter the surface properties of natural fibers. Physical treatment methods include corona, plasma, ultraviolet (UV), fiber beating and heat treatment.

Chemical Modification

The chemical modification methods can achieve by various chemical reactions. Chemical treatments include bases, silanes, acetylation, benzoylation, peroxides, maleated coupling agents, sodium chlorite, acrylation and acrylonitrile grafts, isocyanates, stearic acid, permanganate, triazine, oleoyl chloride and fungal treatments.

Features And Applications

  • Textile Industry
    It is well known that several natural fibers play an indispensable role in the textile industry, especially cotton, wool, silk, etc. They dominate the scale of production and use of textiles.
  • Composite Material
    Natural fibers are replacing synthetic fibers in composites due to their low cost, low density, high availability, and low tool wear. For renewability and sustainability, natural fibers are widely used as reinforcements. For example, Ramesh et al. developed a sisal-jute-glass fiber reinforced polyester composite with improved impact properties. [1]
    Summary of the advantages and disadvantages of green composites compared to traditional petrochemical composites [2]
Less expensiveLower mechanical properties (especially impact strength)
Lower weightHigher moisture absorption
Higher flexibilityLower durability
RenewablePoor fire resistance
BiodegradableVariation in quality
Good thermal and sound insulationRestricted maximum processing temperature
Eco-friendlyPoor microbial resistance
NontoxicLow thermal resistance
Lower energy consumptionDemand and supply cycles
No residues when incinerated
No skin irritations
  • Biomedical Materials
    Natural fibers often show promise as biomaterials in medical applications. For example, chitin can be used as bone filler material for tissue regeneration, drug carrier and excipient, and antineoplastic agent.


  1. Ramesh M, et al. Advanced Materials Research, 2014, 984–985, 266–272.
  2. Aliakbar Gholampour, et al. Journal of Materials Science, 2020, 55, 829–892.

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