无机填料对PP木塑复合材料物理力学性能的影响  

Effect of Inorganic Fillers on Physical and Mechanical Properties of PP Wood-plastic Composites

作　　者：孟令宇 李祥瑞 刘明利[1] 李春风[1] 孟黎鹏[2] Meng Lingyu;Li Xiangrui;Liu Mingli;Li Chunfeng;Meng Lipeng(School of Materials Science and Engineering,Beihua University,Jilin 132000;Jilin Forestry Science Research Institute,Changchun 130000)

机构地区：[1]北华大学材料科学与工程学院,吉林吉林132000 [2]吉林省林业科学研究院,长春130000

出　　处：《工程塑料应用》2022年第1期155-160,共6页Engineering Plastics Application

基　　金：吉林省预算内基本建设资金(创新能力建设)项目(2021C036-8)。

摘　　要：为了利用无机填料开发出更加高效、环保、友好的新型木塑制品,考察了无机填料种类及含量对木塑复合材料物理力学性能的影响。以杨木粉纤维、聚丙烯(PP)、碳酸钙、硅灰石、硅藻土为原料,采用熔融共混和热压成型的方法制备PP木塑复合材料,测试并分析了复合材料的弯曲性能、吸水率、吸水厚度膨胀率和表面耐磨性能。结果表明,随着无机填料含量的增加,木塑复合材料的静曲强度、弹性模量、表面耐磨性等性能整体呈现先上升后下降的趋势,添加质量分数10%硅藻土的木塑复合材料静曲强度和表面耐磨性能提升最大,静曲强度较未添加无机填料的复合材料提升了42.9%,磨耗值降低至18.2 mg/100 r;添加质量分数20%硅灰石的木塑复合材料弹性模量提升最大,提升了41.1%;碳酸钙对复合材料吸水率及吸水厚度膨胀率的降低作用优于另两种无机填料。In order to use inorganic fillers to develop new wood-plastic products that are more efficient,environmentally and friendly,the effects of inorganic filler types and contents on the physical and mechanical properties of wood-plastic composites were investigated.Poplar wood flour fiber,polypropylene(PP),calcium carbonate,wollastonite,and diatomite were used as raw materials to prepare PP wood-plastic composites by melt blending and hot pressing,and tests and analyses of bending properties,water absorption rate,thickness swelling rate,and surface wear resistance of the composites were conducted.It is concluded that with the increase of inorganic filler content,the static flexural strength,elastic modulus and surface wear resistance of the wood-plastic composites show a trend of first increasing and then decreasing in general.The static flexural strength and surface wear resistance of the wood-plastic composite with 10wt%diatomite increase the most,the static flexural strength increases by 42.9%compared with the composite without inorganic fillers and the wear value decreases to 18.2 mg/100 r.The elastic modulus of the wood-plastic composite with 20wt%wollastonite increases the most,which increases by 41.1%compared with the composite without inorganic fillers.Calcium carbonate is better than the other two inorganic fillers in reducing the water absorption rate and thickness swelling rate of the composites.

关 键 词：无机填料 聚丙烯 木塑复合材料 

分 类 号：V254.3[一般工业技术—材料科学与工程] TQ321.5[航空宇航科学与技术—航空宇航制造工程]