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同时增强强度和性:双块移植纤维素纳米纤维单元纳米复合材料

Sikai Chen¹, Peng Lin¹, Jinglin Yuan¹

¹School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China.

International journal of biological macromolecules

|October 18, 2024

概括

新的纤维素纳米纤维 (CNF) 纳米复合材料与双块接种聚合物显示了提高的高温机械性能和可调节的性. 这些先进材料为各种应用提供了增强的强度和灵活性.

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
纳米技术纳米技术

背景情况:

同聚合物移植纤维素纳米纤维 (CNF) 的纳米复合材料面临着局限性.
开发基于CNF的先进材料对于提高性能至关重要.

研究的目的:

为了合成和表征双块植入的CNF纳米复合材料.
研究这些新型材料的热,形态和机械性能.

主要方法:

通过可逆失活激进聚合 (RDRP) 合成CNF-g-(聚乙烯酸乙-聚甲基甲酸) .
化学结构和比例确认.
热分析 (T_g),热力学分析和机械测试 (拉伸强度,破裂时的延伸).

主要成果:

双块移植的CNF表现出两种不同的玻璃过渡温度 (T_g) 和相分离形态.
接种密度影响了形态学:密集接种的岛屿结构,稀疏接种的连续结构.
纳米复合材料在高温下保持机械性能,抗拉强度高达43.7MPa,破裂时的延长率为70.3%.

结论:

密集移植的CNF增强了模量和强度.
稀疏地移植的CNF表现出类似于热塑性弹性体的行为 (较低的模量,更高的延长).
双块接种的CNF纳米复合材料提供可调节的机械性能和更好的高温性能.

关键词:

区块共聚合物区块共聚合物纤维素纳米纤维是一种纤维素纳米纤维.纳米复合材料的使用方法

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