Natural fiber reinforced composites chemical treatment

Xue L, Tabil LG, Panigrahi S (2007) Chemical treatments of natural fiber for use in natural fiber reinforced composites a review. J Polym Environ 15 25-33 Yanai Y Non-resin shrink-proof process, Caltopia. Nisshinbo Industries Inc. Miai Plant, Aichi, Japan (unpublished)... 

Hepworth DG, Hobson RN, Bruce DM, Farrent JW (2000) The use of unretted hemp fibre in composite manufacture. Compos A 31 1279-1283 Idicula M, Boudenne A, Umadevi L, Ibos L, Candau Y, Thomas S (2006) Thermophysical properties of natural fibre reinforced polyester composites. Compos Sci Technol 66 2719-2725 Ioffe R, Andersons J, Wallstrom L (2003) Strength and adhesimt characteristics of elementary flax fibers with different surface treatments. Compos A 34 603-612 John MJ, Anandjiwala RD (2008) Recent developments in chemical modification and characterization of natural fiber-reinforced composites. Polym Compos 29 187-207 John MJ, Anandjiwala RD, Thomas S (2009) Hybrid cranposites. In Thomas S, Pothan LA (eds) Natural fiber reinforced polymer composites macro to nanoscale. Old City, Philadelphia, pp 315-328... 

Li Y et al (2007) Chemical treatments of natural fiber use in natural fiber-reinforced composites a review. J Polym Environ 15 25-33... 

Various treatment methods onto oil palm fibers are already discussed in detail [22, 23, 45-47] including a detailed discussion on various treatments on lignocellulosic fibers in general to improve their properties [48]. Reviews on the developments in chemical modification and characterization of natural fiber-reinforced composites... 

The strength of the fiber is very important for natural fiber-reinforced composites. Polar natural fibers are inherently incompatible with hydrophobic polymers. Therefore, the surface modification of natural fibers is required to improve its physical and chemical properties. Various chemical treatment methods have been used to modify the surface properties of the natural fibers. Few methods of surface modification are described below ... 

Li, X., Tabil, L. G., Panigrahi, S., Chemical Treatments of Natural Fiber for Use in Natural Fiber-Reinforced Composites A Review. 15,25-33 (2007). 

Natural fibers-reinforced polymer matrixes provide more alternatives in the materials market due to their unique advantages. Poor fiber-matrix interfacial adhesion may affect the physical and mechanical properties of the resulting composites due to the surface incompatibihty between hydrophilic natural fibers and non-polar polymers. The results presented in this chapter focus on the properties of palm and pineapple fibers in terms of their physical and chemical structure, mechanical properties and processing behavior. The final properties of these fibers with thermoplastics matrixes are also presented, paying particular attention to the use of physical and chemical treatments for the improvement of fiber-matrix interaction. 

Several studies have been made to optimize the properties of natural fiber-reinforced PLA composites from the point of view of fiber-matrix adhesion. Pretreatment of fibers, such as chemical modification, seems to be the most promising approach, in which covalent bonds are formed between the fiber and matrix. One of the most common and efficient methods is alkali treatment (for example, with 2% sodium hydroxide aqueous solution) of fibers, which has been used to... 

EFFECT OF CHEMICAL TREATMENT ON THE MECHANICAL PROPERTIES OF NATURAL FIBER-REINFORCED POLYMER COMPOSITES... 

Kabir, M. M., Wang, R, Lau, K. T, Cardona, F. Chemical treatments on plant-based natural fiber reinforced polymer composites An overview. Compos. Part B-Eng. 2012,43,2883-2892. 

The mechanical properties of composites are mainly influenced by the adhesion between matrix and fibers of the composite. As it is known from glass fibers, the adhesion properties could be changed by pretreatments of fibers. So special process, chemical and physical modification methods were developed. Moisture repel-lency, resistance to environmental effects, and, not at least, the mechanical properties are improved by these treatments. Various applications for natural fibers as reinforcement in plastics are encouraged. 

Effects of various chemical treatments such as sodium hydroxide, isocyanate, permanganate, and peroxide on the tensile properties of sisal fiber-reinforced low-density polyethylene (LDPE) composites were investigated. Sodium hydroxide treated fiber composites showed better tensile properties than xmtreated composites, and the enhancement was attributed to their rough surface topography and increased aspect ratio. It was reported that long chain structured cardanol derivative of toluene diisocyanate (CTDIC) treatment reduces the hydrophilic nature of the sisal fiber resulting in improved compatibility and dispersion. It was also reported that peroxide treatment of fiber showed maximum interfacial interactions [33]. 

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