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制备交叉连接粉的新型高效湿工艺:尿素对交叉连接性能的影响

Yan Min¹, Jie Yi², Rui Dai¹

¹College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China; Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China.

Carbohydrate polymers

|September 2, 2023

概括

这项研究引入了一种高效的湿过程,用于使用尿素和六甲酸盐 (SHMP) 进行交叉链接的粉. 尿素增强了粉的交叉连接,提高了效率和材料特性,用于更广泛的应用.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
生物化学生物化学

背景情况:

交叉链粉的潮湿工艺是有希望的,但面临的挑战是效率和盐的使用.
开发更绿色,更有效的粉修饰方法对于材料应用至关重要.

研究的目的:

提出一种高效,更绿色的湿工艺,用于使用尿素和六甲酸盐 (SHMP) 进行粉交联.
研究尿素对酸化粉的交联效率和性能的影响.

主要方法:

开发了一种新的湿工艺,使用SHMP进行尿素辅助化粉.
使用31P NMR和13C NMR进行了尿素化交叉链粉 (UPCS) 和常规化交叉链粉 (CPCS) 的特征.
评估结构差异和材料性能,包括热稳定性,耐水性和剪切耐受性.

主要成果:

对UPCS的最大替代度 (DS) (0.040在35°C) 显著高于CPCS (0.031在45°C),表明效率增加了29.03%.
尿素将最佳交叉连接温度降低了10°C,证明了增强的交叉连接性能.
与CPCS相比,UPCS表现出更好的热稳定性,耐水性,抗酸/性和稳定的剪切耐受性.

结论:

尿素有效地提高了湿过程中粉交叉链接的效率,可能是通过防止活性位点通过疏水相互作用关闭.
开发的用尿素辅助的方法提供了一个简单的途径,以生产具有优越性质的交叉链粉.
这种更绿色的方法为制造和应用先进的交联粉材料提供了一个有希望的替代方案.

关键词:

交叉链接是指交叉链接.疏水性相互作用疏水性相互作用土豆粉土豆粉六甲酸是的六甲酸.尿素氨基酸尿素氨基酸

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