提高交联水性聚氨的抗水性和机械性质,使用糖基酸盐
Yong Rok Kwon1,2, Jun Ho Park1,3, Hae Chan Kim1,2
1User Convenience Technology R&D Department, Korea Institute of Industrial Technology (KITECH), 143, Hanggaul-ro, Sangnok-gu, Ansan-si 15588, Gyeonggi-do, Republic of Korea.
Polymers
|October 16, 2024
概括
这项研究使用糖基酸盐 (GC) 交叉链接剂增强了水性聚氨 (WPU). 循环化GC提高了机械强度和耐水性,为先进涂料提供了有前途的解决方案.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
背景情况:
- 水性聚氨 (WPU) 面临由于水性乳化剂的阻水性和机械强度的限制.
- 提高WPU性能对于扩大其在涂料中的应用至关重要.
研究的目的:
- 为了研究甘基基酸盐 (GC) 作为增强WPU性能的交叉连接剂的有效性.
- 评估GC中不同异酸盐结构 (异酸,环酸,芳香酸) 对WPU性能的影响.
主要方法:
- 合成了三种类型的甘基酸盐 (GC) 使用异酸,循环异酸和芳香异酸.
- 使用GC的环氧组与WPU中的碳酸和氨基组反应的交叉连接WPU.
- 以交叉连接密度,机械性能 (模块,硬度,抗拉强度),耐水性和颜色来表征由此产生的WPU薄膜.
主要成果:
- 基于芳香GC的WPU显示出最高的交联密度,模量,硬度和耐水性,但受到脆性和黄色的影响.
- 与纯净的WPU相比,基于循环化GC的WPU显著提高了拉伸强度 (增加了2.7倍),硬度 (增加了1.5倍) 和减少了水胀 (66%的减少).
- 基于GC的阿利法性WPU也显示出改善,尽管明显程度低于循环阿利法和芳香类型.
结论:
- 甘基酸盐交叉连接是一种有效的策略,可以提高WPU的抗水性和机械性能.
- 循环化GC提供了平衡的性能改善,克服了芳香GC的脆性问题.
- 开发的WPU材料适用于需要卓越耐用性和防水性的先进涂层应用.
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