炭黑—SiO_2双相纳米填料的制备及其复合材料的结构与性能研究
作者：焦海全
院校:北京化工大学
关键字:双相纳米填料;制备;结构;性能;补强;SSBR
学位：硕士
专业:应用化学
摘要:
本论文研究工作分为四个部分： 第一部分：采用价廉的水玻璃和HCL、MAA、CO2酸化体系为原料，通过材料配比、制备温度、时间、搅拌速度等工艺条件的研究，制备出比市场上销售的二氧化硅粒径更小的呈网络附聚体形态的SiO2粉体。提出一套较成熟的具有较佳性价比的用HCL作为酸化体系制备SiO2的工艺及技术。 第二部分：研究了自研制的和市售的SiO2粉体的化学结构、形态特征及对S-SBR的补强性能。研究了自合成的纳米二氧化硅填充胶料的物理特性、加工性能、动态力学性能，并与南吉沉淀法二氧化硅进行了对比。 第三部分：考察了HCL最佳浓度、反应温度、陈化时间、不同白炭黑百分含量对双相填料化学结构、掺杂形态和补强性能的影响，确定了双相填料的制备工艺：先制备SiO2粉体前驱液，基体选用炭黑N330，反应温度控制在70℃，最终PH值控制在7.5左右，陈化时间40－50min，白炭黑含量5％~10％，成功制备出了炭黑－SiO2粉体纳米双相填料。 第四部分：比较了炭黑、SiO2、炭黑/ SiO2物理混合填料、自制的双相填料对锡偶联S-SBR胶料的补强效果，结果表明双相填料比N330炭黑的补强性能、耐磨性能优异，动态性能基本与N330持平。
Abstract:
The research of the thesis can be divided into four parts: Part one. The cheap raw materials, such as soluble glass, HCl, MAA were used as reactant. A aggregation SiO2 powder with network-type was prepared by controlling the ratio of material, temperature, time, mixing speed, which has smaller size than that of products sold in the market. A new suitable and commercial technology for producing SiO2 made from acid system with HCl was supported. Part Two. The SiO2 made in Laborary and sold in market were characterized by chemical structure, morphological character and reinforcement for S-SBR. The physical character, processability and dynamic mechanic property of synthetic nanometer SiO2 were investigated and compared with that of precipitated SiO2. Part Three. The influence of HCl concentration, reaction temperature, aging timc,SiO2 content percent on chemical structure,doping state of dual phase filler and it’s reinforcement for SSBR were studied. A preparation technology was assured. Precursor solution of SiO2 powder was prepared firstly, carbon N330 was used as base, the reactive temperature was controlled at 70℃, the final pH value was limited around 7.5, aging time was 40-50min, the content of SiO2 was 5%~10%. At last, a two-state nanometer filler, carbon- SiO2 was manufactured successfully. Part Four. Various filler weights ration of carbon and SiO2, lab-made two-state nanometer filler, were used for comparing the reinforcement for S-SBR. It was shown that homemade two-state nanometer filler has better reinforcements and wear-resisting property than that of N330, dynamic mechanical property is similar with N330.