长竹纤维/聚乳酸单向复合材料的制备及其性能  

Preparation Process and Properties of BF/PLA Unidirectional Composite

作　　者：徐海宇 张蔚 姚文斌 张金烨 祁献超 XU Haiyu;ZHANG Wei;YAO Wenbin;ZHANG Jinye;QI Xianchao(College of Optical Electromechanical Engineerin,Zhejiang A&F University,Hangzhou,Zhejiang 311300,China;Jiyang College,Zhejiang A&F University,Shaoxing,Zhejiang 311800,China)

机构地区：[1]浙江农林大学光机电工程学院,浙江杭州311300 [2]浙江农林大学暨阳学院,浙江绍兴311800

出　　处：《塑料》2022年第3期50-54,共5页Plastics

基　　金：浙江省公益性技术研究项目(LGN21C160006);浙江农林大学暨阳学院人才启动项目(RQ1911A02)。

摘　　要：为了制备高性能的长竹纤维/聚乳酸复合材料,在复合材料层压工艺的基础上,提出并对比了PLA纤维包缠法、捻合法制备工艺。通过制备3种不同工艺的BF/PLA单向层合板,分析了不同制备方法对其力学性能及吸水性的影响。结果表明,捻合工艺制备的层合板综合性能最佳,拉伸强度为69.69 MPa,弯曲强度为61.28 MPa,与层压工艺相比,其拉伸强度提高了35.74%,弯曲强度提高了8.42%。与其他2种工艺相比,捻合工艺制备的样品的拉伸断面较为平整,竹纤维拔出明显减少,因此,该方法提高了长竹纤维与基体的界面强度。吸湿性实验表明,3种工艺制备的层合板的吸湿性均不符合Fick定律,但层压工艺的层合板的吸湿性较低,材料耐水性最佳。In order to prepare high-performance long bamboo fiber/polylactic acid composite,based on the lamination process of composite,the preparation processes of PLA fiber wrapping and twisting were proposed and discussed.By preparing BF/PLA unidirectional laminates with three different processes,the effects of different preparation methods on their mechanical properties and water absorption were tested and analyzed.The results showed that the laminate prepared by twisting processhad the best comprehensive properties,with tensile strength of 69.69 MPa and bending strength of 61.28 MPa.Compared with lamination process,the tensile strength and bending strength were increased by 35.74%and 8.42%.Compared with the other two processes,the tensile section of the samples prepared by twisting process was relatively flat,and the pull-out of bamboo fiber was significantly reduced,indicating that this method improved the interfacial strength between long bamboo fiber and matrix.The moisture absorption experiment showed that the moisture absorption of the laminates prepared by the three processes didn’t comply with Fick’s law,but the moisture absorption of the laminates prepared by the lamination process was relatively low,and the water resistance of the materials was the best.

关 键 词：BF/PLA复合板 复合工艺 绿色复合材料 力学性能 吸水性能 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]