Mechanochemical activation of cellulose and its thermoplastic polyvinyl alcohol ecocomposites with enhanced physicochemical properties
Mechanochemical activation of cellulose and its thermoplastic polyvinyl alcohol ecocomposites with enhanced physicochemical properties
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机械化学活化纤维素及其热塑性聚乙烯醇生态复合材料，增强理化性能
DOI：
10.1016/j.carbpol.2010.07.062
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发表时间：
2011
影响因子：
11.2
通讯作者：
Deng Yulin
中科院分区：
文献类型：
--
作者：
Zhang Wei;Yang Xiaoliang;Li Cuiying;Liang Mei;Lu Canhui;Deng Yulin
这项工作的重点是研究纤维素的机械化学处理对其聚乙烯醇（PVA）复合材料的物理化学性能的影响。经过盘磨的纤维素纤维可以通过剪切力和压缩力破坏分子内和分子间氢键而被机械化学活化。纤维素表面暴露出反应性羟基，可以与PVA建立新的氢键。此外，盘磨纤维素粒径的同时减小和比表面积的大幅增加将有利于其分散以及与聚合物基质的界面粘附。 PVA/纤维素复合材料在含有甲酰胺和水的增塑剂存在下成功地通过熔体加工。拉伸测试表明机械化学处理取得了积极的结果。随着纤维素盘铣次数的增加，PVA/纤维素复合材料的拉伸强度从8.8MPa增加到16.4MPa，而断裂伸长率从76.8%增加到374%。该复合材料还表现出增强的热稳定性和更好的生物降解性。
The focus of this work is to study the influence of mechanochemical treatment of cellulose on the physicochemical properties of its polyvinyl alcohol (PVA) composites. Cellulose fibers subjected to pan-milling could be mechanochemically activated by breaking up the intra- and inter-molecular hydrogen bonds through shearing and compressing forces. Reactive hydroxyl groups were exposed on the cellulose surface, which could establish new hydrogen bonds with PVA. Moreover, the simultaneous reduction of particle size and large increment of specific surface area of pan-milled cellulose would benefit its dispersion as well as the interfacial adhesion with polymer matrix. PVA/cellulose composites were successfully processed by the melt in the presence of plasticizers containing formamide and water. Tensile tests demonstrated positive results from mechanochemical treatment. As pan-milling cycles of cellulose increased, the tensile strength of PVA/cellulose composites increased from 8.8MPa to 16.4MPa, while elongation at break increased from 76.8% to 374%. The composite materials also exhibited enhanced thermal stability and better biodegradability.
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影响因子：
2.4
作者：
Chakraborty, A;Sain, M;Kortschot, M
通讯作者：
Kortschot, M
影响因子：
5.7
作者：
Wei Zhang;Mei Liang;Canhui Lu
通讯作者：
Wei Zhang;Mei Liang;Canhui Lu
影响因子：
2
作者：
Chen, N.;Li, L.;Wang, Q.
通讯作者：
Wang, Q.
DOI：
10.1016/j.compositesa.2007.03.004
发表时间：
2007-01-01
影响因子：
8.7
作者：
Bengtsson, Magnus;Le Baillif, Marie;Oksman, Kristiina
通讯作者：
Oksman, Kristiina
影响因子：
9.1
作者：
D. Mulinari;H. Voorwald;M. Cioffi;Maria Emília Nadaletto Bonifácio da Silva;T. G. Cruz;C. Saron
通讯作者：
D. Mulinari;H. Voorwald;M. Cioffi;Maria Emília Nadaletto Bonifácio da Silva;T. G. Cruz;C. Saron