Design and fabrication of recyclable and reshape vitrified elastomer reinforced with renewable cellulose nanocrystal

编号 020037901

推送时间 20230123

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 Design and fabrication of recyclable and reshape vitrified elastomer reinforced with renewable cellulose nanocrystal

来源期刊 Composites Communications

期 第379期

发表时间 20220601

关键词 Cellulose nanocrystals;  Interfacial exchangeable bonds;  Reprocessable; 

摘要 Developing the recyclable elastomeric vitrimer with dynamic covalent bonds is a very promising strategy to alleviate the burden of traditional vulcanized rubber materials on the environment. In this work, we proposed to introduce epoxidized soybean oil (ESO) as a cross-linking agent into carboxyl nitrile butadiene rubber (XNBR)/ TEMPO-oxidized cellulose nanocrystals (TO-CNC) composites, and successfully prepared ESO-cured XNBR/TOCNC elastomeric vitrimer with dynamic 0-hydroxyl ester bonds, which are formed between the epoxy group of ESO and the carboxyl group of XNBR or TO-CNC. The TEMPO oxidation of CNC is validated by a series of characterizations such as FTIR, conductometric titration, and element analysis. The formation of the 0-hydroxyl esters is as well evidenced by the FTIR analysis and the curing curves. Interestingly, the TO-CNC exhibits good dispersion in the composite, and a remarkable mechanical reinforcement is observed for ESO-cured XNBR/TOCNC elastomer, for instance, the tensile strength of the composite with 15 phr TO-CNC was 2.4 times greater than that of the unfilled sample. Moreover, this composite as well shows good reshaping capability and reprocess ability. Generally, this work offers a novel approach to preparing green cross-linked elastomer/bio-based CNC composites that can potentially overcome the bottleneck of the non-recycling of traditional vulcanized rubber.

服务人员 尚玮姣

服务院士 宋湛谦

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