基于多个氢键和动态硼酸键的生物基单组分湿固化聚氨酯弹性体，具有超高的机械强度和韧性

IF 6.3 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-09-10 DOI:10.1016/j.jtice.2025.106385

Weijie Li , Ruibin Mo , Binglin Mai , Weiwei Liu , Xiang Jiang , Xinya Zhang

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引用次数: 0

摘要

单组分湿固化聚氨酯（1C-MCPU）已广泛应用于各个领域。然而，目前以不可再生的汽油为原料制备的c - mcpu的力学性能较差，制约了其实际应用和可持续发展。以呋喃二甲酸二甲酯和水合肼为原料合成了生物基肼扩链剂（F-HZ），并以4-羟基苯基硼酸和1,2,6-己三醇为原料首次合成了动态硼酸扩链剂（B-OH）。然后将制备好的F-HZ和B-OH掺入其中，成功制备了具有超高力学性能的生物基c - mcpu。方法用氢键指数反映酰基氨基脲（ASCZ）中肼与异氰酸酯基团反应形成的多个氢键。用原子力显微镜对微相分离结构进行了表征。异氰酸酯在固化过程中与水分的高反应性，有利于将线性动态硼酸键转化为硼基交联，从而提高了1C-MCPU的强度和拉伸性。c - mcpu的抗拉强度和伸长率分别达到50.63 MPa和1683.14%，分别是相关ASTM（ASTM D6947/D6947 - 16:4.14 MPa和350%）技术规范的12.23倍和4.81倍。这项工作为提高c - mcpu的可持续性和机械性能提供了一种新的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

A bio-based one-component moisture curing polyurethane elastomer with ultrahigh mechanical strength and toughness based on multiple hydrogen bonds and dynamic boronate bonds

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A bio-based one-component moisture curing polyurethane elastomer with ultrahigh mechanical strength and toughness based on multiple hydrogen bonds and dynamic boronate bonds

Background

One-component moisture curing polyurethane (1C-MCPU) has been widely used in various fields. Nevertheless, the poor mechanical properties of 1C-MCPU, which currently always prepared from non-renewable petrol-based resource restrict its practical application and sustainable development. A bio-based hydrazide chain extender (F-HZ) was synthesized from dimethyl furandicarboxylate and hydrazine hydrate and a dynamic boronate chain extender (B-OH) was prepared by using 4-hydroxyphenylboronic acid and 1,2,6-hexanetriol at first. And then a bio-based 1C-MCPU with ultrahigh mechanical properties was successfully fabricated by incorporating the as-prepared F-HZ and B-OH.

Methods

The multiple hydrogen bonds formed among acylsemicarbazide (ASCZ) groups by the reaction between hydrazide and isocyanate groups are reflected in H-bonding index. The microphase separation structure was characterized by AFM. The high reactivity of isocyanate with moisture during the curing process facilitates the conversion of linear dynamic borate bonds into boroxy cross-links, and thus enhancing the strength and stretchability of 1C-MCPU.

Significant Findings

The tensile strength and elongation of 1C-MCPUs is up to 50.63 MPa and 1683.14 %, respectively, which are 12.23 times and 4.81 times higher than the relevant ASTM(ASTM D6947/D6947–16:4.14 MPa and 350 %) technical specifications. This work provides a new strategy to enhance the sustainability and mechanical performance of 1C-MCPUs.

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.