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2044 P. S. Souza et al. / Procedia Engineering 10 (2011) 2040–2045 3.3. Moisture absorption property Figure 3 shows percentage of moisture absorbed in materials. It was observed that the composites presented higher moisture absorption compared to HDPE pure. This fact occurred due the natural fibers change its dimensions when absorb humidity. Therefore the composite (HDPE/FT 10%) presented higher moisture absorption compared to the others. Moisture absorption increases with increasing fibers loading. Mulinari et al. [2] investigated the relationship between the moisture absorption of sugarcane bagasse fibers reinforced HDPE composites and the fibers loadings 5%, (10%, 20%, 30% and 40% by weight). They found that the moisture absorption increased almost linearly with the fibers loading. 4. Conclusions 0,34 0,32 0,30 0,28 0,26 0,24 0,22 0,20 0,18 0,16 0,14 0,12 0,10 HDPE HDPE/FT5% HDPE/FT10% 2 4 6 8 10 Time (day) Figure 3. SEM of the textile fibers from industrial residue: (a) unmodified; (b) modified. After conducting the experimental work and discussing the results relieved that addition of modified textile fibers from industrial residue to matrix (HDPE) improved the tensile strength and modulus, well as moisture water. The fracture region showed that there was an excellent dispersion of fibers in the matrix and a good interfacial bonding between fiber-matrix, which caused this improve in the mechanical properties of composites. Acknowledgements Authors are grateful for the research support by UniFOA. References [1] Xie Y, Hill CAS, Xiao Z, Mai HMC. Silane coupling agents used for natural fiber/polymer composites: A review. Compos Part A 2010:41;806–819. [2] Mulinari DR, Voorwald, HJC, Cioffi MOH, Rocha GJ, Da Silva MLCP. Surface modification of sugarcane bagasse cellulose and its effect on mechanical and water absorption properties of sugarcane bagasse cellulose/ HDPE composites. Bioresouces 2010;5:661-671. Moisture absorption (%)PDF Image | Mechanical properties of HDPE textile fibers composites
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