Reinforcing potential of wood pulp-derived microfibres in a PVA matrix
Reinforcing potential of wood pulp-derived microfibres in a PVA matrix
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DOI：
10.1515/hf.2006.010
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发表时间：
2006-01-01
期刊：
影响因子：
2.4
通讯作者：
Kortschot, M
中科院分区：
文献类型：
--
作者：
Chakraborty, A;Sain, M;Kortschot, M
在这项研究中，增强潜力的纤维素“微纤维素”从漂白针叶木硫酸盐纸浆中获得的聚乙烯醇（PVA）的矩阵中证明。微纤维被定义为直径为0.1-1 mm的纤维素纤维，相应的最小长度为5-50 mm。在PVA中用这些微纤维浇铸的膜显示出拉伸强度加倍，并且在微纤维负载为5%的情况下刚度增加2.5倍。微纤维的理论刚度计算为69 GPa。该研究还表明，与10%的负载相比，复合材料的强度在5%的微纤维负载下更大。与微晶纤维素的比较研究表明，在复合材料中提供增强时，增强剂的最小纵横比其结晶度更关键。
In this study, the reinforcing potential of cellulose "microfibres'' obtained from bleached softwood kraft pulp was demonstrated in a matrix of polyvinyl alcohol (PVA). Microfibres are defined as fibres of cellulose of 0.1-1 mm in diameter, with a corresponding minimum length of 5-50 mm. Films cast with these microfibres in PVA showed a doubling of tensile strength and a 2.5-fold increase in stiffness with 5% microfibre loading. The theoretical stiffness of a microfibre was calculated as 69 GPa. The study also demonstrated that the strength of the composite was greater at 5% microfibre loading compared to 10% loading. Comparative studies with microcrystalline cellulose showed that the minimum aspect ratio of the reinforcing agent is more critical than its crystallinity in providing reinforcement in the composite.