| 摘要: |
| 目的 研究PLA/木质纤维复合材料的制备工艺过程，分析PLA纤维含量对复合材料力学性能的影响，确定最优配比，以获得一种可应用于包装中的新型环保复合材料。方法 将不同质量配比的PLA纤维及木质纤维按照造纸的工艺进行抄造，获得湿纸胚后再进行热压处理，获得需要的复合材料。对PLA纤维在复合材料中的分散性以及复合材料的力学性能进行表征与测试。结果 分散性试验表明，PLA纤维能够与木质纤维均匀混合；当PLA纤维的质量分数为10%时，复合材料的性能较好。力学测试表明，复合材料的拉伸强度最大可达到42.79 MPa，耐折次数可达到1015次。结论 PLA/木质纤维复合材料可采用造纸的方法进行制备，且力学性能较好，能在包装领域内有较为广泛的应用，同时也为可降解纤维的研究应用提供了一种新思路。 |
| 关键词: PLA纤维 复合材料 分散性 力学性能 |
| DOI：10.19554/j.cnki.1001-3563.2019.21.012 |
| 分类号:TB484 |
| 基金项目:天津科技大学青年创新基金（2016LG27） |
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| Preparation and Properties of PLA/wood Fiber Composites |
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CHEN Ming-fen, KANG Yong-gang, ZHANG Lei, FU Zhi-qiang
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Tianjin University of Science & Technology, Tianjin 300222, China
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| Abstract: |
| The work aims to study preparation process of PLA/wood fiber composites, analyze the influence of PLA fiber content on the mechanical properties of the composites, and determine the optimal ratio, in order to obtain a new type of environmental composites which can be used in packaging. Different quality ratios of PLA fiber and wood fiber were made according to the papermaking process, and the wet ground paper was obtained and treated by hot pressing to obtain composite samples. Dispersion of PLA fibers in composites and mechanical properties of composites were characterized and tested. The dispersion test showed that, the PLA fibers could be evenly mixed with the wood fiber. When the mass fraction of PLA fibers was 10%, the composite properties were better. The mechanical test showed that, the maximum tensile strength of composites could reach up to 42.79 MPa, and the folding endurance could reach 1015 times. The PLA/wood fiber composites can be prepared by papermaking method, and their mechanical properties are better. The composites can be widely used in the field of packaging, and also provide a new way of thinking for the research and application of degradable fibers. |
| Key words: PLA fiber composites dispersion mechanical properties |
