The thioacetamide derivative(TD)-composite preservation system(TDCPS)exhibits superior preservation effects on natural rubber latex(NRL)and significantly enhances its vulcanization efficiency and mechanical properties...The thioacetamide derivative(TD)-composite preservation system(TDCPS)exhibits superior preservation effects on natural rubber latex(NRL)and significantly enhances its vulcanization efficiency and mechanical properties.This study primarily investigated the principal chemical groups and mechanism of action of TDCPS in promoting NRL vulcanization through a comparative analysis.The results indicated that the key functional groups(thioamide and pyridine)in TDCPS synergistically accelerated crosslinking,reducing the vulcanization time by 41.18%compared to the high-ammonia(HA)preservation system.At an optimal TDCPS dosage of 5 mmol·L^(−1),vulcanized films achieved a tensile strength of 34.18 MPa,with a sulfur content of 1.5 phr further improving the strength by 42.26%.TD outperformed the conventional accelerators 2-imidazolidinethione(ETU)and 3-hydroxypyridine(3-Hp)in promoting the crosslinking density and mechanical performance while eliminating ammonia-related environmental risks.This eco-friendly system demonstrates the industrial potential for sustainable rubber production.展开更多
通过对羧基丁腈胶乳微生物污染情况及防腐剂残留量的测试,发现在高温海运条件下,原用于胶乳中的防腐剂卡松(通常其活性成分氯甲基异噻唑啉酮与甲基异噻唑啉酮的质量比为3/1)容易失效,导致胶乳腐败变质。防腐剂活性物在50℃下的热储实验...通过对羧基丁腈胶乳微生物污染情况及防腐剂残留量的测试,发现在高温海运条件下,原用于胶乳中的防腐剂卡松(通常其活性成分氯甲基异噻唑啉酮与甲基异噻唑啉酮的质量比为3/1)容易失效,导致胶乳腐败变质。防腐剂活性物在50℃下的热储实验表明,甲基异噻唑啉酮在经历了初期的迅速降解后,在热储中保持稳定,降解率均值54.5%;氯甲基异噻唑啉酮在热储14 d内几乎完全降解。进而考察了含有甲基异噻唑啉酮的防腐剂Acticide M 10和Acticide M 10 S对羧基丁腈胶乳的防腐效果,结果显示,添加浓度为450×10^(-6)的防腐剂Actidice M 10的羧基丁腈胶乳,经过高温海运后仍有良好的防腐效果。展开更多
基金the Ministry of Agriculture and Rural Affairs of Chinathe Department of Science and Technology of the Hainan Province for their support+2 种基金financially supported by the National Key R&D Program of China(No. 2022YFD2301201)Hainan Province Science and Technology Special Fund (No. ZDYF2024XDNY284)Earmarked Fund for China Agriculture Research System (No.CARS-33-JG1)
文摘The thioacetamide derivative(TD)-composite preservation system(TDCPS)exhibits superior preservation effects on natural rubber latex(NRL)and significantly enhances its vulcanization efficiency and mechanical properties.This study primarily investigated the principal chemical groups and mechanism of action of TDCPS in promoting NRL vulcanization through a comparative analysis.The results indicated that the key functional groups(thioamide and pyridine)in TDCPS synergistically accelerated crosslinking,reducing the vulcanization time by 41.18%compared to the high-ammonia(HA)preservation system.At an optimal TDCPS dosage of 5 mmol·L^(−1),vulcanized films achieved a tensile strength of 34.18 MPa,with a sulfur content of 1.5 phr further improving the strength by 42.26%.TD outperformed the conventional accelerators 2-imidazolidinethione(ETU)and 3-hydroxypyridine(3-Hp)in promoting the crosslinking density and mechanical performance while eliminating ammonia-related environmental risks.This eco-friendly system demonstrates the industrial potential for sustainable rubber production.
文摘通过对羧基丁腈胶乳微生物污染情况及防腐剂残留量的测试,发现在高温海运条件下,原用于胶乳中的防腐剂卡松(通常其活性成分氯甲基异噻唑啉酮与甲基异噻唑啉酮的质量比为3/1)容易失效,导致胶乳腐败变质。防腐剂活性物在50℃下的热储实验表明,甲基异噻唑啉酮在经历了初期的迅速降解后,在热储中保持稳定,降解率均值54.5%;氯甲基异噻唑啉酮在热储14 d内几乎完全降解。进而考察了含有甲基异噻唑啉酮的防腐剂Acticide M 10和Acticide M 10 S对羧基丁腈胶乳的防腐效果,结果显示,添加浓度为450×10^(-6)的防腐剂Actidice M 10的羧基丁腈胶乳,经过高温海运后仍有良好的防腐效果。
