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Novel Biocomposites from Polylactide (PLA) and Bamboo Fibers

机译：来自聚乳糖（PLA）和竹纤维的新型生物复合材料

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Biodegradable polymers such as polylactide (PLA) have been widely studied during the past decade [1-3]. PLA has better mechanical properties than polypropylene (PP) [3]. However, in some cases, PLA cannot be used independently for the adjustment of toughness [2]. A relatively easy way to improve the mechanical properties of a polymer is the addition of fibers or filler materials [2,3]. Bamboo is an abundant natural resource in Asia and South America, and its overall mechanical properties are comparable to or surpass those of wood. It is necessary to develop a practical process for fabricating bamboo fiber reinforced composites. The present study evaluates the mechanical and thermal performances of the pre-treated bamboo reinforced biocomposites. In order to enhance the behavior of these composites, bamboo fibers have been treated with sodium hydroxide and a silane coupling agent. 3- Aminopropyltriethoxysilane (APS) was used as a surface modifying coupling agent for bamboo fibers, because of the ability of APS to bond to PLA, as suggested by Dupraz et al. [4]. During the surface treatment, APS hydrolyzes and the resultant silanol groups can bond with the bamboo fiber surface. Amine groups from APS can form hydrogen bonds to COO-sites on the hydrolyzed PLA backbone [4]. The aim of this study is to investigate the influence of fiber surface treatment on the mechanical and thermal-mechanical properties of the bamboo fiber reinforced PLA composites. Bamboo fiber reinforced PP composites were also processed in order to compare their properties with PLA composites.
机译：在过去的十年中，在过去十年中已经广泛研究了可生物降解的聚合物如聚物（PLA）。 PLA具有比聚丙烯（PP）的更好的机械性能[3]。但是，在某些情况下，PLA不能独立使用，以调整韧性[2]。改善聚合物的机械性能的相对简单的方法是添加纤维或填料[2,3]。竹子是亚洲和南美的丰富自然资源，其整体机械性能与木材相当或超越木材。有必要开发一种制造竹纤维增强复合材料的实用方法。本研究评估了预处理的竹增强生物复合材料的机械和热性能。为了增强这些复合材料的行为，已用氢氧化钠和硅烷偶联剂处理竹纤维。 3-氨基丙基三乙氧基硅烷（APS）用作竹纤维的表面改性偶联剂，因为APS与PLA键合的能力，如Dupraz等人所提出的。 [4]。在表面处理期间，APS水解和所得硅烷醇基团可以与竹纤维表面键合。来自AP的胺基团可以将氢键与水解的PLA骨架上的Coo-位点形成[4]。本研究的目的是探讨纤维表面处理对竹纤维增强PLA复合材料的机械和热机械性能的影响。还处理竹纤维增强PP复合材料，以便将它们的性质与PLA复合材料进行比较。

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