摘要
在真空条件下,天然胶乳橡胶粒子会膨胀、破裂,从而引起天然胶乳的凝固.本研究首次将真空技术引入天然胶乳凝固领域.真空凝固天然胶乳可物理控速、凝固彻底、胶清清澈、污染低.与酸凝固天然胶乳的生胶及微生物凝固天然胶乳的生胶相比,真空凝固胶具备多孔、叠层结构,干燥失水快、抗氧指数(PRI)高、硫化速度较快,硫化后物理机械性能在3种硫化胶中最优.本研究为天然胶乳的凝固提供了一种新的物理方法.
Under vacuum natural rubber particles in natural rubber latex will expand, burst and coagulate. In this study, vacuum technology was applied to coagulate natural rubber latex. This vacuum coagulation of natural rubber latex could be controlled physically. The skim latex obtained as a byproduct during this procedure was cleaner than that obtained from other procedures; this procedure would therefore reduce pollution from latex processing. The natural raw rubber produced by vacuum coagulation had a porous and layered structure. Compared with the natural raw rubber coagulated by acid and microbiological methods, the natural raw rubber produced in this study was faster to dehydrate and vulcanize, and had a higher plasticity retention index. The vulcanized rubber from vacuum coagulation had better physical and mechanical properties than that prepared by acid or microbiological coagulation. The method developed in this work is a novel physical way to coagulate natural rubber latex.
出处
《科学通报》
EI
CAS
CSCD
北大核心
2011年第15期1184-1187,共4页
Chinese Science Bulletin
基金
国家现代农业产业技术体系资助项目(nycytx-17)
关键词
天然橡胶胶乳
真空
凝固
natural rubber latex, vacuum, coagulation
