表面改性纳米SiO2增强木质纤维/聚氯乙烯复合材料性能  

Properties of wood fiber/polyvinyl chloride composites reinforced by surface modified nano SiO_2

作　　者：谭林朋 袁光明[1,2] 罗卫华 胡云楚[1,2] 牟明明 陈世尧[1] TAN Linpeng1 , YUAN Guangming1, 2 , LUO Weihua1,2, HU Yunchu1,2, MOU Mingming1 , CHEN Shiyao1(1. College of Material Science and Engineering, Central South University of Forestry ＆ Technology, Changsha 410004, China; 2. Hu＇nan Collaborative Innovation Center for Effective Utilizing of Wood ＆ Bamboo Resource, Changsha 410004, Chin)

机构地区：[1]中南林业科技大学材料科学与工程学院,长沙410004 [2]"木竹资源高效利用"湖南省高校2011协同创新中心,长沙410004

出　　处：《复合材料学报》2018年第3期501-507,共7页Acta Materiae Compositae Sinica

基　　金：国家林业公益性行业科研专项资助项目(201504503);国家自然科学基金(31770606);湖南省科技重大专项(2017NK1010)

摘　　要：SiO_2粒子经偶联剂γ-氨丙基三乙氧基硅烷(KH550)表面改性后,与木质纤维、聚氯乙烯(PVC)及其它助剂通过熔融混炼制备改性SiO_2-木质纤维/PVC复合材料,用FTIR、SEM和同步热分析仪(STA)对SiO_2粒子和SiO_2-木质纤维/PVC复合材料的结构与性能进行测试与表征。FTIR分析表明,SiO_2粒子表面接枝了KH550的特征官能团,KH550成功地接枝到SiO_2粒子表面;SEM分析表明,改性纳米SiO_2粒子能在木质纤维/PVC复合材料中均匀分散,其粒径在100nm左右;添加改性的SiO_2粒子后,木质纤维和PVC结合更加紧密,孔洞间隙减少。纳米SiO_2质量分别占木质纤维质量的10%、8%和10%时,SiO_2-木质纤维/PVC复合材料的弹性模量、拉伸强度、冲击强度分别达到最优值4.66GPa、31.12 MPa和4.11kJ/m2,与未添加SiO_2的复合材料相比分别提高了50.29%、28.91%和16.65%。The surface modification of nano SiO2 particles withγ-aminopropyl triethoxysilane（KH550）was carried out,The SiO2-wood fiber/polyvinyl chloride（PVC）composites were prepared by melt-mixing with wood fiber,PVC and other additives.The structure and properties of SiO2 particles and SiO2-wood fiber/PVC composites were tested and characterized by FTIR,SEM and STA.FTIR analysis shows that the surface of SiO2 particles bond KH550 characteristic organic functional group,KH550 successfully grafts to the surface of SiO2 particles.SEM analysis shows that the modified nano-SiO2 particles can be dispersed uniformly in the SiO2-wood fiber/PVC composites with aparticle size of about 100 nm;After adding the modified SiO2 particles,the combination of wood fiber and PVC is more tight,the hole gap is reduced.When the mass ratio of nano SiO2 to wood flour mass is 10%,8%,10%,the mechanical property of the SiO2-wood fiber/PVC composites will reach the optimal state：elastic modulus,tensile-strength and impact-strength are 4.66 GPa,31.12 MPa and 4.11 kJ/m2,increased by 50.29%,28.91% and 16.65%,respectively.

关 键 词：表面改性 纳米SIO2 力学性能 复合材料 结构表征 

分 类 号：S781.2[农业科学—木材科学与技术] TB332[农业科学—林学]