硅灰石表面改性及其在顺丁橡胶中的应用  

SURFACE MODIFICATION OF WOLLASTONITE AND ITS APPLICATION IN BUTADIENE RUBBER

作　　者：陈佳敏 汪称意 董卫龙 赵彦冰 缪培峰 徐建平 Chen Jiamin;Wang Chengyi;Dong Weilong;Zhao Yanbing;Miao Peifeng;Xu Jianping(School of Materials Science and Engineering,Changzhou University,Changzhou,Jiangsu 213164;Changzhou Shunxiang New Materials Technology Co.,Ltd.;Jiangsu Peida Plastic Co.,Ltd.)

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]常州市顺祥新材料科技股份有限公司 [3]江苏培达塑料有限公司

出　　处：《石油炼制与化工》2024年第10期118-123,共6页Petroleum Processing and Petrochemicals

基　　金：江苏省研究生科研与实践创新计划项目(KYCX22-3030)。

摘　　要：采用硬脂酸对硅灰石进行表面改性,考察硅灰石尺寸、改性前后硅灰石份数对顺丁橡胶(BR)力学性能、硫化性能及止滑性能的影响。红外光谱及接触角测试证明:硬脂酸与硅灰石表面羟基发生反应,使其疏水性明显提高;力学性能及硫化性能测试表明:相同用量下,添加改性硅灰石的BR复合材料拉伸强度和断裂伸长率明显提升,硫化速率变小;止滑性能测试结果表明:添加改性硅灰石可以使BR复合材料在冰面和油润滑玻璃表面的摩擦因数显著提高;扫描电子显微镜表征显示:未改性的硅灰石与橡胶间界面间隙清晰,而改性后的硅灰石与橡胶间界面间隙模糊。在本试验配方条件下,添加40份改性硅灰石的BR复合材料,其拉伸强度为10.77 MPa,断裂伸长率为803%,油润滑玻璃表面和冰面摩擦因数达到了0.48,具有较好的力学性能和止滑性能。Stearic acid(SA)was used to modify wollastonite,and the effects of wollastonite size and the amount of wollastonite before and after modification on the mechanical properties,vulcanization performance and slip resistance of butadiene rubber(BR)were investigated.The results of infrared spectroscopy and contact angle tests showed the hydrophobicity of wollastonite was obviously improved by the reaction between stearic acid and hydroxyl groups on the surface of wollastonite.The results of mechanical and vulcanization performance tests indicated that the tensile strength and elongation at break of BR composite material with modified wollastonite were significantly improved under the same dosage,while the vulcanization rate decreased.The results of antislip performance test showed that adding modified wollastonite could significantly improve the friction coefficient of BR composite materials on ice and oil surfaces.The scanning electron microscope indicated that the interface gap between unmodified wollastonite and rubber was clear,but the interface gap was blurred after modification.Under the conditions of formula,the tensile strength of BR composite with 40% modified wollastonite was 10.77 MPa,the elongation at break was 803%,and a friction coefficient between oil surface and ice surface was 0.48,which had good mechanical and slip resistance properties.

关 键 词：硅灰石 表面改性 顺丁橡胶 力学性能 止滑性能 

分 类 号：TQ333.2[化学工程—橡胶工业]