Effect of various surface modifications of wood flour on the properties of PP/wood composites
Effect of various surface modifications of wood flour on the properties of PP/wood composites
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DOI：
10.1016/j.compositesa.2009.10.008
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发表时间：
2010-02-01
影响因子：
8.7
通讯作者：
Pukanszky, Bela
中科院分区：
文献类型：
--
作者：
Danyadi, Livia;Moczo, Janos;Pukanszky, Bela
采用四种不同的方法对PP/木粉复合材料的界面相互作用进行了改性。我们比较了马来酸酐(MAPP)、两种表面活性剂(硬脂酸和棕榈酸纤维素)和木材的化学改性(苯基化)对界面粘附性、均匀性、加工性和吸水率的影响。如预期的那样，加入顺丁烯二酸酐聚合物后，界面粘附性和增强效果都有所改善。非反应性表面改性导致相互作用适度减弱，而苄基化则显著降低了界面粘附性。MAPP不影响任何其他感兴趣的性质；均匀度、粘度和吸水率几乎保持不变，与偶联剂的使用量无关。表面活性剂改善了木材的均匀性和加工性，而对木材进行的苄基化化学改性显著降低了吸水率。结果清楚地证明，适当选择表面改性的方法和水平可以显著提高靶向性能。(C)2009爱思唯尔有限公司。保留所有权利。
Four different approaches were used for the modification of interfacial interactions in polypropylene (PP)/wood flour composites. We compare the effect of maleated polypropylene (MAPP), two surfactants (stearic acid and cellulose palmitate) and the chemical modification of wood (benzylation) on interfacial adhesion, homogeneity, processability and water absorption. Interfacial adhesion and reinforcement improves upon the addition of a maleated polymer as expected. Non-reactive surface modification leads to a moderate decrease of interaction, while benzylation decreases interfacial adhesion quite considerably. MAPP does not influence any other property of interest; homogeneity, viscosity and water absorption remain practically unchanged independently of the amount of coupling agent used. Surfactants improve homogeneity and processability, while the chemical modification of wood by benzylation decreases water absorption significantly. The results clearly prove that the proper selection of the approach and level of surface modification may lead to considerable improvement in targeted properties. (C) 2009 Elsevier Ltd. All rights reserved.