谢美然
Xie Meiran
人物简介
用点击化学将杜仲胶从硬橡胶变为软橡胶的高分子化学家
事迹
谢美然是华东师范大学化学与分子工程学院教授，长期从事易位聚合与功能高分子研究。他针对杜仲胶常温下结晶发硬、难以作为弹性体使用的问题，提出'侧链工程'概念，利用丁基/乙基己基/己基壬基三唑啉二酮对杜仲胶进行Alder-ene点击化学改性，将生物基杜仲胶由硬橡胶转变为室温高弹性软橡胶，改性后Teh30样品断裂伸长率达1311%、弹性回复率92%，各项指标与天然橡胶相当。
他还突破了高分子量杜仲胶成纤难题，通过湿纺、电纺工艺制备直径10~100μm的杜仲胶弹性纤维，其强度超越氨纶弹性纤维甚至媲美UHMWPE和芳纶1414等特种纤维，为高弹力运动护具和纺织材料提供了全新生物基选项，相关成果获授权发明专利并在杜仲产业论坛多次作大会报告。
重要活动 / 事件
- 2018年12月在2018中国杜仲产业发展高峰论坛作'杜仲胶弹性化和弹性纤维'报告
- 2019年11月在贵阳全国杜仲产业发展高峰论坛作'杜仲胶改性——从硬橡胶到软橡胶的转变'大会报告
代表贡献
- 提出改善杜仲胶弹性和阻尼性的'侧链工程'概念，拓展硬橡胶室温分子弹性理论
- 用三唑啉二酮(TAD)类点击化学调控杜仲胶结晶度，制得断裂伸长率1311%、弹性回复率92%的高弹软橡胶，各项指标与天然橡胶相当
- 发明'一种生物基杜仲胶弹性纤维和纤维膜及其制备方法与应用'专利(CN108893870B)，纤维断裂伸长率最高达700%，强度超氨纶
- 主持国家自然科学基金项目6项，承担杜仲综合利用国家地方联合工程实验室开放基金重点项目'杜仲胶易位改性和杂化橡胶性能研究'(NLE201602)
- 在Nat. Commun.、Polym. Rev.、Chem. Mater.等期刊发表系列成果
Profile
A polymer chemist who used click chemistry to turn Eucommia rubber from a hard rubber into a soft rubber.
Story
Xie Meiran is a professor at the School of Chemistry and Molecular Engineering, East China Normal University, long engaged in metathesis polymerization and functional polymers. To address the problem that Eucommia rubber crystallizes and hardens at room temperature, making it unusable as an elastomer, he proposed the 'side-chain engineering' concept, modifying Eucommia rubber via Alder-ene click chemistry with butyl/ethylhexyl/hexylnonyl triazolinediones, transforming bio-based Eucommia rubber from a hard rubber into a room-temperature highly elastic soft rubber. The modified Teh30 sample achieved 1311% elongation at break and 92% elastic recovery, comparable in all indicators to natural rubber.
He also broke through the difficulty of fiber formation from high-molecular-weight Eucommia rubber, preparing Eucommia rubber elastic fibers of 10-100 micrometers in diameter by wet spinning and electrospinning, whose strength surpasses spandex fibers and even rivals specialty fibers such as UHMWPE and aramid 1414 - providing an entirely new bio-based option for high-elasticity sports protectors and textile materials. The results are protected by granted invention patents and were presented as keynote talks at multiple Eucommia industry forums.
Milestones
- In December 2018, delivered the report 'Elasticization of Eucommia rubber and elastic fibers' at the 2018 China Eucommia Industry Development Summit Forum
- In November 2019, gave the keynote 'Modification of Eucommia rubber - the transformation from hard rubber to soft rubber' at the National Eucommia Industry Development Summit Forum in Guiyang
Key Contributions
- Proposed the 'side-chain engineering' concept for improving the elasticity and damping of Eucommia rubber, extending the theory of room-temperature molecular elasticity of hard rubber
- Used triazolinedione (TAD)-type click chemistry to regulate the crystallinity of Eucommia rubber, producing a highly elastic soft rubber with 1311% elongation at break and 92% elastic recovery - properties comparable to natural rubber
- Invented the patent 'A bio-based Eucommia rubber elastic fiber and fiber membrane, and preparation method and application thereof' (CN108893870B); fiber elongation at break up to 700% with strength exceeding spandex
- Led 6 National Natural Science Foundation of China projects; undertook the key open-fund project 'Study on metathesis modification of Eucommia rubber and properties of hybrid rubber' (NLE201602) of the National-Local Joint Engineering Laboratory for Eucommia Comprehensive Utilization
- Published a series of results in journals including Nature Communications, Polymer Reviews and Chemistry of Materials
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