1,2-双硫环戊烷封端的硅烷偶联剂改性白炭黑及其橡胶复合材料的制备与性能  

Preparation and Properties of 1,2-Dithiocyclopentane End-Capping Silane Coupling Agent Modified Silica and Its Rubber Composite Materials

作　　者：邓硕 徐林竹 赵青云 曾碧榕[1,2] 何凯斌 戴李宗[1,2] Shuo Deng;Linzhu Xu;Qingyun Zhao;Birong Zeng;Kaibin He;Lizong Dai(College of Materials,Xiamen University,Xiamen 361005,China;Fujian Provincial Key Laboratory of Fire Retardant Materials,Fujian Provincial Industry Technology Innovation Research Institute of Flame Retardant and Fireproof Materials,Xiamen 361005,China)

机构地区：[1]厦门大学材料学院,厦门福建361005 [2]福建省防火阻燃材料重点实验室,福建省高分子阻燃与防火材料产业技术创新研究院,福建厦门361005

出　　处：《高分子材料科学与工程》2025年第1期30-42,共13页Polymer Materials Science & Engineering

基　　金：福建省中央引导地方科技发展资金项目“多功能绿色轮胎橡胶复合材料研发与产业化应用”(2022L3002)。

摘　　要：为了提升硅烷偶联剂对白炭黑的改性效果,文中提出新型含双硫环戊烷硅烷偶联剂的设计与应用研究。首先通过酰胺化反应使硫辛酸和氨丙基三乙氧基硅烷反应,合成了一种以1, 2-二硫环戊烷封端的新型硅烷偶联剂5-(1, 2-二硫代烷基-3-基)-N-(3-(三乙氧硅烷基丙基)丙基)戊酰胺(LATES);进而通过水解缩合反应对白炭黑A200的表面进行改性。最后使用不同添加量的LATES-A200为填料制备了LATES-A200/NR橡胶复合材料并表征其性能。结果表明,LATES有效提升了白炭黑A200在橡胶中的分散性,添加量45 phr的10%LATES-A20045/NR橡胶复合材料的综合性能最好。与未改性的A200/NR相比,10%LATES-A20045/NR橡胶拉伸强度从19.51 MPa提高到25.74 MPa,60℃时的tan δ从0.111降低到0.071,表明橡胶的滚动阻力降低,结合胶的含量和交联密度增加。在应用相同处理方法及添加量情况下,LATES改性的二氧化硅对NR性能的影响效果优于Si69改性的二氧化硅,可为“绿色轮胎”橡胶复合材料的发展提供新的助剂选择。In order to enhance the modification effect of silane coupling agent on silica,this paper proposed the design and application study of a novel silane coupling agent containing dithiocyclopentane.Firstly,a new silane coupling agent 5-(1,2-dithiolan-3-yl)-N-(3-(triethoxysilylpropyl)propyl)valeramide(abbreviated as LATES)was synthesized by reacting lipoic acid and aminopropyltriethoxysilane through amidation reaction;then the surface of silica A200 was modified by hydrolysis condensation reaction.Finally,LATES-A200/NR rubber composites were prepared and characterized using different amounts of LATES-A200 as fillers.The results show that LATES can effectively enhance the dispersion of silica A200 in rubber,and the 10%LATES-A20045/NR rubber composite with 45 parts per million of additive shows the best overall performance.Compared with the unmodified A200/NR,the tensile strength of 10%LATES-A20045/NR rubber increases from 19.51 MPa to 25.74 MPa,and the tanδat 60℃decreases from 0.111 to 0.071,indicating a decrease in the rolling resistance of the rubber and an increase in the content of the binding rubber and crosslinking density.Under the same treatment method and addition amount,the effect of LATES-modified silica on performance of NR is better than that of Si69-modified silica,which can provide a new choice of additives for the development of rubber composites for green tires.

关 键 词：硅烷偶联剂 双硫环戊烷 改性白炭黑 橡胶复合材料 分散性 

分 类 号：TB332[一般工业技术—材料科学与工程]