Category Archives: GREEN BIORENEWABLE. BIOCOMPOSITES

TUBULIFORM GLAND

Female spiders use the tubuliform gland to spin fibers that are constituents of egg sacs. The tubuliform gland has a cylindrical shape and extrudes fibers referred to as tubuliform silks (Fig. 1.1). The main component found in tubuliform silks repre­sents the spidroin family member Tubuliform Spidroin 1 (TuSpl). Northern blot and quantitative real-time PCR analyzes have demonstrated that TuSpl transcripts […]

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BIOCOMPOSITES COMPOSED OF BIO-BASED EPOXY RESINS, BIO-BASED POLYPHENOLS AND LIGNOCELLULOSIC FIBERS

MITSUHIRO SHIBATA ABSTRACT In recent years, renewable resources-derived polymers (bio-based polymers) and composites (biocomposites) are attracting a great deal of attention because of the advantages of these polymers such as conservation of limited petroleum resources, possible biodegradability, the control of carbon dioxide emissions that lead to global warming. This chapter deals with the preparation, thermal and mechanical proper­ties of the […]

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DEVELOPMENT AND PROPERTIES OF SUGAR PALM FIBER REINFORCED POLYMER COMPOSITES

S. M. SAPUAN, L. SANYANG, and J. SAHARI ABSTRACT Natural fibers have recently become attractive as an alternative reinforcement for fiber reinforced polymer composites. They are gaining more attention due to their low cost, easy availability, less health hazards, fairly good mechanical properties, high specific strength, nonabrasive, ecofriendly and bio-degradability characteris­tics. Polymers from renewable resources have attracted tremendous amount of […]

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MISCIBILITY BETWEEN WOOD BASED-POLYMERS AND COMPOSITES: CHEMICAL MODIFICATION OF SURFACE

The major problem in designing cellulose based-biocomposites is the lack of misci­bility between components, that is, hydrophilic biopolymers from wood fibers and hydrophobic substances (matrix), leading to poor adhesion between matrix and fiber in the final composite. To overcome this problem, chemical coupling agents have been employed to improve the adhesion between fibers and matrix through a variety of approaches […]

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EFFECT OF COVALENT COMPATIBILIZATION

Surface modified cellulose nanocrystals are also gaining a significant attention to improve the compatibility between the filler and matrix.45 In a recent study, nano­composites of chitosan were prepared using methyl adipoyl chloride functionalized cellulose nanocrystals in which the primary amine groups of chitosan were shown to conjugate with functionalized cellulose, as shown in Fig. 16.3.

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