改性钢渣微粉/麦秸秆纤维/PVC复合材料性能  

Properties of Modified Steel Slag Micropowder/Wheat Straw Fiber/PVC Composite

作　　者：李利 晋强[1] 何春霞[2] 朱琳[1] 胡荻 LI Li;JIN Qiang;HE Chunxia;ZHU Lin;HU Di(College of w ater Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi,Xinjiang 830052,China;College of Engineering,Nanjing Agricultural University,Nanjing,Jiangsu 210031,China;Urumqi City Building Materials Science Research Institute,Urumqi,Xinjiang 830000,China)

机构地区：[1]新疆农业大学,水利与土木工程学院,新疆乌鲁木齐830052 [2]南京农业大学,工学院,江苏南京210031 [3]乌鲁木齐市建筑建材科学研究院,新疆乌鲁木齐830000

出　　处：《塑料》2020年第4期99-104,共6页Plastics

基　　金：自治区区域协同创新专项(科技援疆计划)(2019E0241)。

摘　　要：将钢渣微粉(SSM)、麦秸秆纤维(WSF)作为填料,通过挤出成型工艺制得聚氯乙烯(PVC)基复合材料,分别研究了不同配比(0∶10、1∶9、2∶8、3∶7、4∶6)的改性钢渣微粉和麦秸秆纤维对复合材料的力学性能、吸水特性、尺寸热稳定性能的协同作用以及微观形貌的影响。结果表明,钢渣微粉经偶联剂改性后,分散性及与PVC基体的相容性得到改善,制得的复合材料力学性能较好,拉伸强度、弯曲强度、弯曲模量、冲击强度分别提升9.8%、5.45%、13.10%、2.95%。随改性钢渣微粉/麦秸秆纤维配比的增加,复合材料的力学性能先上升后下降,其综合力学性能在配比为3∶7时,达到最优。材料的拉伸强度、弯曲强度、弯曲模量、冲击强度分别为16.67%、20.76%、4.64%、34.41%;吸水率及吸水厚度膨胀率均明显下降,分别为7.19%和4.74%,综合吸水特性在配比为3∶7时,达到最佳;尺寸热稳定性逐渐下降,当改性钢渣微粉/麦秸秆纤维配比从0∶10增加到4∶6时,复合材料的热膨胀系数LTEC值增加了26.31%。Taking Steel slag micropowder(SSM) and wheat straw fiber(WSF) as fillers,through extrusion molding process,polyvinyl chloride(PVC) based composite was prepared,at the same time the influences of different modified SSM/WSF ratios(0∶ 10,1∶ 9,2∶ 8,3∶ 7,4∶ 6) on the composite’s mechanical properties,water absorption characteristics,synergy of dimensional thermal stability and microscopic morphology were investigated.The results showed that the SSM’s dispersibility and compatibility with PVC matrix were improved after SSM was modified by the coupling agent,and the obtained composite’s mechanical properties were better,whose tensile strength,bending strength,bending modulus and impact strength increased by respectively 9.89%,5.45%,13.10% and 2.95%.With the increase of the modified SSM/WSF ratio,the mechanical properties first increased then decreased,whose general mechanical properties reached the best at the ratio of 3 ∶ 7,in which case composite’s tensile strength,bending strength,bending modulus and impact strength were respectively 16.67%,20.76%,4.64% and 34.41%.Water absorption and water absorption thickness expansion rate decreased,and comprehensive water absorption characteristics reached the top at the ratio of 3∶ 7,where the water absorption and water absorption thickness expansion rate were respectively 7.19% and 4.74%.Dimensional thermal stability decreased,and the thermal expansion coefficient of composite increased by 26.31% when the ratio of modified SSM to WSF increased from 0∶ 10 to 4∶ 6.

关 键 词：麦秸秆纤维 钢渣微粉改性 力学性能 吸水特性 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]