竹原纤维增强聚乙烯复合材料的制备工艺研究  

Preparation Technology of Bamboo Fiber Reinforced Polyethylene Composites

作　　者：周吓星[1,2] 范宏玥 童文瑄 黄勇兵 刘嘉 陈礼辉 Zhou Xiaxing;Fan Hongyue;Tong Wenxuan;Huang Yongbing;Liu Jia;Chen Lihui(College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials,Fuzhou 350002,China;Zhangzhou Xinhuacheng Machinery Manufacturing Co.,Ltd.,Zhangzhou 363900,Fujian,China;China National Forest Product Industry Association WPC Professional Committee,Beijing 102627,China)

机构地区：[1]福建农林大学材料工程学院,福州350002 [2]植物纤维功能材料国家林业和草原局重点实验室,福州350002 [3]漳州鑫华成机械制造有限公司,福建漳州363900 [4]中国林产工业协会木塑复合材料专业委员会,北京102627

出　　处：《中华纸业》2022年第2期9-13,共5页China Pulp & Paper Industry

基　　金：国家重点研发计划课题(2019YFC1905903);国家重点研发计划资助项目(2017YFD0600802)。

摘　　要：采用自制的长度为10~25 mm、平均长径比为285.7的毛竹竹原纤维(BF)作为增强相,聚乙烯(PE)塑料为基体,热压制备B F/P E复合材料,分析热压温度和纤维含量对复合材料力学性能和吸水性能的影响。研究发现,热压处理可以提高PE的熔融流动以及竹纤维的表面渗透性,促进竹纤维和PE的物理机械结合;当热压温度由150℃增至180℃时,复合材料的力学性能增强。适量竹原纤维可较好增强PE基复合材料力学性能,但会降低材料的耐水性。随着纤维含量的增加,B F/P E复合材料的拉伸和弯曲性能呈现先增加后降低的趋势,冲击强度不断降低,当纤维含量为30%时,复合材料的综合力学性能较佳,拉伸强度、弯曲强度、弯曲模量和冲击强度分别为18.57 MPa、27.17 MPa、2238.22 MPa、33.17 kJ/m^(2),24 h吸水率为9.29%。The BF/PE composite was prepared by hot pressing using the self-made bamboo fiber(BF)with length of 10mm-25mm and average aspect ratio of 285.7 as reinforcement phase and polyethylene(PE)as matrix.The effects of hot pressing temperature and fiber content on the mechanical properties and water absorption of the composite were analyzed.The results showed that hot pressing can improve the melting flow of PE and the surface permeability of bamboo fiber,and promote the physical-mechanical bonding between bamboo fiber and PE.When the hot pressing temperature increased from 150℃to 180℃,the mechanical properties of the composites were enhanced.The mechanical properties of PE-based composites can be improved with the addition of proper BF amount,but its water resistance reduced.With the increase of fiber content,the tensile and bending properties of BF/PE composites increased first and then decreased,and the impact strength decreased continuously.When the fiber content was 30%,the comprehensive mechanical properties of the composites were better.The composite tensile strength,bending strength,bending modulus and impact strength were 18.57 MPa,27.17 MPa,2238.22 MPa and 33.17 kJ/m^(2),respectively;and the 24 h water absorption was 9.29%.

关 键 词：竹原纤维 竹纤维增强复合材料 热压 力学性能 吸水性 

分 类 号：TB332[一般工业技术—材料科学与工程] TS721.2[轻工技术与工程—制浆造纸工程]