白炭黑增强天然橡胶的热氧再生  

Thermal-oxidative reclamation of natural rubber reinforced with silica

作　　者：成元海 路永春 张震 吕弘煜 丁明强 王仕峰[3] CHENG Yuan-hai;LU Yong-chun;ZHANG Zhen;LÜ Hong-yu;DING Ming-qiang;WANG Shi-feng(Gansu Public Aviation Travel Low Carbon Technology Co Ltd,Lanzhou 730070,China;Shanghai Municipal Engineering Design Institute(Group)Co Ltd,Shanghai 200092,China;Department of Polymer Science and Engineering,School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]甘肃公航旅低碳科技有限公司,兰州730070 [2]上海市政工程设计研究总院(集团)有限公司,上海200092 [3]上海交通大学化学化工学院高分子材料研究所,上海200240

出　　处：《合成橡胶工业》2024年第3期210-215,共6页China Synthetic Rubber Industry

基　　金：科技部重点研发计划项目(2021YFE0105200);上海市“科技创新行动计划”启明星项目(杨帆专项:23YF1442200);中国博士后科学基金资助项目(2023M732329)。

摘　　要：研究了使用少量大豆油溶胀白炭黑增强天然橡胶(SNR)在不同温度和时间下的再生规律,并测定了再生产物的化学组分和微观形态。结果表明,在160~240℃温度范围内,经过20份(质量)大豆油溶胀后的SNR中溶胶含量随着温度升高而不断增加,当在220℃时再生15 min后再生产物中溶胶质量分数增至50.5%,而在200℃时再生产物中溶胶质量分数仅为28.7%,表明220℃是SNR再生中重要的转折温度;再生产物中氧元素含量的增加源于SNR在再生过程中发生了剧烈的氧化反应。此外,随着再生程度的增加,白炭黑表面松散层结合胶层厚由25 nm减至8 nm,表明热氧再生能够实现纳米白炭黑与其表面结合胶的高度剥离。The reclamation law of natural rubber reinforced with silica(SNR)swollen by a small amount of soybean oil at different temperatures and in different time was studied,and the chemical composition and micromorphology of the reclaimed pro-ducts were determined.The results showed that within the temperature range of 160 and 240℃,the sol content of SNR increased continuously with the increasing temperature after swollen by soybean oil of 20 phr(mass),and when reclaimed at 220℃ for 15 min,the mass fraction of sol in the reclaimed product increased to 50.5%,and the mass fraction of sol in the reclaimed product was only 28.7% at 200℃,which indicated that 220℃ was an important turning point temperature in the reclamation process of SNR.The increase in oxygen content in the reclaimed product was due to the violent oxidation reaction of SNR during the reclamation process.In addition,as the degree of reclamation increased,the thickness of bound rubber of loose strata on the surface of silica decreased from 25 nm to 8 nm,indicating that thermal-oxidative reclamation could achieve a high degree of detachment between nano silica and its surface bound rubber.

关 键 词：绿色轮胎 白炭黑 天然橡胶 大豆油 增强 氧化再生 松散层结合胶 

分 类 号：TQ332[化学工程—橡胶工业]