天然胶乳硫化胶膜N-亚硝胺含量影响因素的研究  

Factors Influencing N-Nitrosamine Content in Vulcanized Natural Latex Film

作　　者：谭海生[1] 刘亚娟[1] 刘磊 周松茂 

机构地区：[1]海南大学材料与化工学院,海南海口570228 [2]海南经纬乳胶丝有限责任公司,海南澄迈571924 [3]苏州嘉乐威企业发展有限公司,江苏苏州215000

出　　处：《橡胶科技》2017年第12期16-21,共6页Rubber Science and Technology

基　　金：国家自然科学基金项目(51163006)

摘　　要：采用硫黄硫化体系,考察碱土金属氢氧化物氢氧化镁、氢氧化钙和氢氧化钡,N-亚硝胺消除剂抗坏血酸(VC)和α-生育酚(VE),低亚硝胺型促进剂ZBEC和ZDi BC,以及水沥滤和硫化温度对天然胶乳硫化胶膜N-亚硝胺含量的影响。结果表明:氢氧化镁、氢氧化钙和氢氧化钡能显著降低硫化胶膜的N-亚硝胺含量,氢氧化钡的降低作用最显著,随氢氧化钡用量增大,硫化胶膜的N-亚硝胺含量降低程度提高;VC和VE能显著降低硫化胶膜的N-亚硝胺含量,VE用量为0.5份可使N-亚硝胺含量降低97.56%,VC用量为0.5份可使N-亚硝胺含量降低至检测限(0.01 mg·kg^(-1))以下;水沥滤可降低硫化胶膜的N-亚硝胺含量;提高硫化温度,采用传统促进剂ZDC的硫化胶膜的N-亚硝胺含量降低,采用促进剂ZDi BC的硫化胶膜的N-亚硝胺含量提高;氢氧化钡和N-亚硝胺消除剂以及水沥滤可有效降低硫化胶膜的可亚硝基化物质含量。In this study, the factors influencing the N-Nitrosamine content in the sulfur vulcanized natural latex film were investigated. The studied factors included： alkaline earth metal hydroxides, such as magnesium hydroxide, calcium hydroxide and barium hydroxide; N-nitrosamine elimination agents, specifically,ascorbic acid （VC） and a-tocopherol （VE） ;accelerators with low N-nitrosamine generation, i. e. ZBEC and ZDiBC; water leaching process and vulcanization temperature. The test results showed that the N-nitrosamine content could be effectively reduced with the addition of magnesium hydroxide, calcium hydroxide and barium hydroxide, in which barium hydroxide possessed the most significant effect. It was found that with the increase of the added amount of barium hydroxide, the decrease rate of N-nitrosamine content was even higher. VC and VE could significantly reduce the N-nitrosamine content of the vulcanized film. It was found that 0.5 part of VE could reduce the N-nitrosamine content by 97.56%, and 0.5 part of VC could reduce the N-nitrosamine content to under the detection limit （0.01 mg · kg-1）. The water leaching process could also reduce the N-nitrosamine content. With traditional accelerator ZDC and high vulcanization temperature, the N-nitrosamine content was reduced. In contrast, with accelerator ZDiBC, the N-nitrosamine content was higher. In order to effectively reduce the N-nitrosamine content of the vulcanized film, it was recommended to use barium hydroxide, N-nitrosamine elimination agent, and water leaching process.

关 键 词：天然胶乳 硫化胶膜 N-亚硝胺 碱土金属氢氧化物 N亚硝胺消除剂 促进剂 水沥滤 硫化温度 

分 类 号：TQ331.2[化学工程—橡胶工业] TQ330.385