酵母菌生物脱硫胎面胶粉及其填充天然橡胶的力学性能

Microbial desulfurizated ground tire rubber by saccharomyces cerevisiae and mechanical properties of natural rubber vulcanizates filled with it

用酵母菌对胎面胶粉(GTR)进行了生物脱硫实验,考察了酵母菌与GTR共培养脱硫过程中酵母菌的生长情况,对比了GTR和脱硫GTR(DGTR)填充天然橡胶(NR)硫化胶的交联密度、表面元素含量和力学性能。结果表明,在共培养脱硫过程中酵母菌依然可以保持较高的生物量,脱硫6 d后可获得生物脱硫的GTR。随着胶粉用量的增加,填充NR硫化胶的交联密度和力学性能逐渐降低。相比较GTR/NR硫化胶,DGTR/NR硫化胶的表面硫元素含量和交联密度更低,力学性能明显提高。

The microbial desulfurization of ground tire rubber（GTR） by saccharomyces cerevisiae was conducted.The biomass of saccharomyces cerevisiae was studied when the microbe was co-cultured with GTR,the crosslinking density,surface element contents,and mechanical properties of GTR/natural rubber（NR） and desulfurizated GTR（DGTR）/NR were campared.The results showed that accharomyces cerevisiae was still able to maintain a higher biomass and DGTR was obtained after cultivated for 6 days.With increasing the amount of waste rubber particles,the crosslinking density and mechanical properties of NR vulcanizates filled with GTR or DGTR decreased remarkably.Campared with GTR/NR,DGTR/NR vulcanizates possessed lower surface sulphur content,crosslinking density and higher mechanical properties.