聚酯调控生物质耐水解高剥离PU湿法树脂的研究

Study on polyester regulating hydrolysis resistance and high stripping PU wet resin for biomass

生物质耐水解树脂是一种极具市场潜力的PU合成革材料,但是其存在着剥离强度较低等问题,限制了其在鞋革、箱包革及球革等高剥离要求领域的广泛应用。本文设计合成几款纯聚醚类型的PU湿法树脂,研究不同聚醚之间比例的差异对最终成品湿法贝斯的物性影响,探讨了聚醚多元醇PPG-2000与PTMG-2000之间在PU湿法贝斯之间的协同增强效应,得出纯聚醚类性生物质耐水解PU湿法树脂的优化设计原则。在此基础上,设计聚酯调控生物质耐水解高剥离PU湿法树脂,研究聚酯对于聚醚剥离性能之间的构效关系原理,提出此类湿法贝斯的优化设计原则。本文揭示了高剥离耐水解树脂的形成机制,为生物质耐水解高剥离PU湿法树脂的设计提供了理论依据。通过本论文制得的生物质耐水解高剥离聚氨酯湿法贝斯,剥离强度可以达到47.27 N·kg^-1,在25%的NaOH水溶液中24 h后,剥离强度保持率依然达到了95%。并且本文所制备的湿法贝斯具有超软的手感,即绵中带弹,且有相当良好的湿蜡感。

Biomass hydrolysis-resistant resin is a PU synthetic leather material with great market potential,but it has problems such as low peel strength,which limits its wide range of requirements in high peeling requirements such as shoe leather,luggage leather and ball leather.application.In this paper,several pure polyether type PU wet resins were designed and synthesized.The influence of the difference between different polyethers on the physical properties of the final wet beak was studied.The polyether polyol PPG-2000 and PTMG-2000 were discussed.The synergistic enhancement effect between PU wet basses leads to the optimized design principle of pure polyether-based biomass hydrolysis-resistant PU wet resin.On this basis,the design of polyester-regulated biomass hydrolysis-resistant high-peeling PU wet resin was studied.The principle of structure-effect relationship between polyester and polyether stripping performance was studied.The optimal design principle of such wet-methas was proposed.This paper reveals the formation mechanism of high-stripping hydrolysis-resistant resin,and provides a theoretical basis for the design of biomass hydrolysis-resistant high-peeling PU wet resin.The peeling strength of the biomass hydrolyzed and highly exfoliated polyurethane wet bebes prepared in this paper can reach 47.27 N·kg^-1.After 24 h in 25%NaOH aqueous solution,the peel strength retention rate still reaches 95%.And the wet method prepared in this paper has a super soft hand,that is,a bullet in the cotton,and has a fairly good wet waxy feeling.