有机湿法改性白炭黑对天然橡胶复合材料性能的影响  

Effect of Silica Modified by Organic Wet Process on Properties of NR Composites

作　　者：王兵辉[1] 王魁业 熊玉竹[1,2] WANG Binghui;WANG Kuiye;XIONG Yuzhu(Guizhou University,Guiyang 550025,China;Guizhou Province Engineering Laboratory for Rubber Composites,Guiyang 550025,China)

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]贵州省橡胶复合材料工程实验室,贵州贵阳550025

出　　处：《橡胶工业》2020年第11期803-811,共9页China Rubber Industry

基　　金：国家自然科学基金资助项目(51663003);黔科合支撑项目([2019]2166)。

摘　　要：分别采用双-[3-(三乙氧基硅)丙基]-四硫化物(偶联剂Si69)、离子液体1-丁基-3-甲基咪唑六氟磷酸盐(BMI)、离子液体1-烯丙基-3-甲基氯化咪唑(AMI)对白炭黑进行改性,制备改性白炭黑/天然橡胶(NR)复合材料。研究改性剂对改性白炭黑/NR复合材料的微观结构、硫化特性、物理性能和动态力学性能的影响。结果表明:改性白炭黑的粒径明显减小,其在橡胶基体中的分散性改善,与橡胶基体之间的相互作用增强;改性白炭黑/NR复合材料的硫化速率加快,物理性能明显提高;与偶联剂Si69相比,两种离子液体明显提高改性白炭黑/NR复合材料的硫化效率和物理性能;在相同的应变和频率下,白炭黑/NR复合材料的储能模量从大到小的填料顺序为AMI改性白炭黑、BMI改性白炭黑、偶联剂Si69改性白炭黑、未改性白炭黑;AMI改性白炭黑/NR复合材料的综合性能最好。Modified silica/natural rubber(NR)composite materials were prepared by using the silica modified by bis-[3-(triethoxysilyl)propyl]-tetrasulfide(coupling agent Si69),ionic liquid 1-butyl-3-methylimidazole hexafluorophosphate(BMI)and ionic liquid 1-allyl-3-methylimidazole chloride(AMI),respectively.The effects of modifier on the microstructure,vulcanization properties,physical properties and dynamic mechanical properties of the modified silica/NR composite were investigated.The results showed that the particle size of the modified silica decreased significantly,the dispersion of the modified silica in the rubber matrix was improved,and the interaction between the modified silica and rubber matrix was enhanced.The curing rate of the modified silica/NR composite was accelerated,and the physical properties were significantly improved.Compared with the coupling agent Si69,the two ionic liquids significantly improved the curing efficiency and physical properties of the modified silica/NR composite.Under the same strain or high frequency,the energy storage modulus of the composite decreased in the following order of fillers:AMI modified silica,BMI modified silica,coupling agent Si69 modified silica,and unmodified silica.AMI modified silica/NR composite had the best overall performance.

关 键 词：白炭黑 改性 偶联剂 离子液体 天然橡胶 复合材料 分散性 动态力学性能 

分 类 号：TQ330.383[化学工程—橡胶工业] TQ332.6