高强度聚胺66复合材料增强了以花样纤维素纳米晶为基础的阻燃剂
Yunhui Chen1, Qinan Hou1, Jiefei Wang1
1Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China.
Carbohydrate polymers
|May 21, 2025
概括
一种新的生物基阻燃剂增强了聚胺66 (PA66) 的消防安全性和机械强度. 这种先进的复合材料为更安全的应用提供了优越的耐火性和改进的材料特性.
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
- 消防安全工程 消防安全工程
背景情况:
- 聚胺66 (PA66) 具有较差的耐火性,会排放有毒气体和烟雾.
- 目前用于PA66的阻燃剂通常会因为高负载要求而损害机械性能.
研究的目的:
- 为聚胺66 (PA66) 设计和合成一种新的生物基阻燃剂.
- 显著提高PA66复合材料的阻燃性和机械性能.
主要方法:
- 使用纤维素纳米晶 (CNC),胺聚酸盐 (MPP) 和酸 (ZB) 合成了一种类似花朵的生物基三混合阻燃剂.
- 采用连续接种和静电吸附来形成复合材料.
- 将15%的阻燃剂纳入PA66矩阵中.
主要成果:
- 复合材料呈现出球形排列结构,释放出不可燃气并形成保护性炭层.
- 将限制氧气指数 (LOI) 提高到28.7%,并获得UL-94 V-0评级.
- 与整洁的PA66.6相比,峰值热释放率降低了75%
- 显著增强机械性能,拉力应力和张力分别增加了225%和317%.
结论:
- 开发的生物基阻燃剂有效地提高了PA66的消防安全和机械完整性.
- 该战略为创建防火PA66应用程序提供了一个有前途的方法,保护生命和财产.
相关概念视频
01:22Fiber Reinforced Concrete
65
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
65
01:15Cellulose and Pectic Polysaccharides
3.4K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.4K