天然胶乳中β-谷甾醇的提取分离及其对橡胶老化性能和热稳定性的影响  

Extraction and Separation of β-sitosterol from Natural Rubber Latex and Its Influence on Rubber Aging Properties and Thermal Stability

作　　者：马立胜[1] 廖小雪[1] 陈永平[1] 李新红[1] 廖双泉[1] 

机构地区：[1]海南大学材料与化工学院,海南海口570228

出　　处：《材料科学与工程学报》2011年第5期766-769,共4页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(50963001);973计划前期研究专项资助项目(2010CB635109);海南省教育厅高等学校科研资助项目(HJKJ2009-16)

摘　　要：以有机溶剂氯仿/甲醇为提取液,使用抽提方法从无氨新鲜天然胶乳中提取天然脂类物质。将所提取的脂类物质皂化分离出了β-谷甾醇。测试并分析了β-谷甾醇对天然橡胶(NR)、异戊橡胶(IR)老化性能及热稳定性的影响。实验结果表明,β-谷甾醇具有良好的抗氧化作用,是存在于NR中的天然防老剂,很好地改善了NR的老化性能,对IR也有良好的抗老化效果,并且从不同程度上提高了天然橡胶和异戊橡胶的热稳定性。Lipids existed in natural rubber latex were extracted by organic solvents（choroform/methanol mixes）.The β-sitosterol was separated after saponifing the lipids.Also the influence of β-sitosterol on aging properties and thermal stability of rubber were measured and studied.The results show that β-sitosterol is a natural antioxidant present in natural rubber.It can improve the anti-aging performance of natural rubber.In addition,β-sitosterol is also effective to cis-1,4-polyisoprene.The thermal stability of natural rubber and cis-1,4-polyisoprene have been improved in the different extents by adding β-sitosterol.

关 键 词：天然胶乳 Β-谷甾醇 老化性能 热稳定性 

分 类 号：TQ330[化学工程—橡胶工业]