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首页> 外文会议>49th International wood composites symposium >Impact of Recycling on the Mechanical and Thermo-mechanical Properties of Wood Flour/HDPE and PLA Composites
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Impact of Recycling on the Mechanical and Thermo-mechanical Properties of Wood Flour/HDPE and PLA Composites

机译：回收对木粉/ HDPE和PLA复合材料的机械和热机械性能的影响

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摘要

Plastic waste management is a serious environmental concern all over the world.rnAccording to US Environmental Protection Agency (EPA), in 2012, almost 31.8 million tonsrnof plastics were generated in U.S. A minimum of 1.14 billion pounds of postconsumer filmrn(which includes plastic bags and packaging) was recovered for recycling in 2013, anrnincrease of 74 percent since 2005. At present, there are three well-known approaches forrnplastic waste management- (1) disposal in landfills, (2) incineration, and (3) recycling.rnDisposal in landfills contaminates the soil and the air while incineration makes a totalrndestruction of the material. Recycling is most preferable since it creates no (or little)rnenvironmental pollution and reserves the material for further use. The aim of this researchrnwas to investigate the influence of recycling on the mechanical and thermo-mechanicalrnproperties of wood flour/ HDPE and PLA composites.rnWPC composite formulations included 30 wt% and 50 wt% oak wood flour filled PE andrnPLA matrices. The WPCs were recycled up to six times using twin screw extrusionrnprocess. Injection molded samples were tested for physico-mechanical properties.rnScanning Electron Microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR)rntechniques were used to investigate the fracture surfaces of tensile samples at differentrncycles and to monitor the change of molecular structure of the composite matricesrnrespectively. Results show that these composites could be recycled up to six times withoutrnsubstantial degradation in the mechanical properties.
机译：塑料废物管理是世界范围内严重关注的环境问题。根据美国环境保护署（EPA）的数据，2012年，美国生产了近3180万吨的塑料，至少有11.4亿磅的消费后薄膜（包括塑料袋和包装）在2013年被回收以进行回收利用，自2005年以来增长了74％。目前，存在三种著名的塑料废物管理方法：（1）填埋处理，（2）焚化和（3）回收。垃圾填埋场污染了土壤和空气，而焚烧则完全破坏了材料。回收是最可取的，因为它不会（或几乎没有）对环境造成污染并保留材料以备将来使用。这项研究的目的是研究回收对木粉/ HDPE和PLA复合材料的机械和热机械性能的影响。WPC复合配方包括30重量％和50重量％橡木粉填充的PE和PLA基质。使用双螺杆挤出工艺将木塑制品回收多达六次。测试了注塑样品的物理力学性能。采用扫描电子显微镜（SEM）和傅立叶变换红外光谱（FTIR）技术分别研究了拉伸样品在不同周期下的断裂表面，并监测了复合材料基体的分子结构变化。 。结果表明，这些复合材料可循环使用多达六次，而不会显着降低机械性能。

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