纤维素酸盐在不同水性条件下的降解特征
Jiao Tan1, Yinchun Liang2, Lihui Sun2
1State Key Laboratory of Food Science and Resources, China-Canada Joint Laboratory of Food Science and Technology (Nanchang), Key Laboratory of Bioactive Polysaccharides of Jiangxi Province, Nanchang University, Nanchang 330047, China.
Polymers
|January 17, 2024
概括
纤维素 (CA) 在性或酸性溶液中降解最快,在自然水中降解最小. 环境pH值和盐度显著影响CA水解,而微生物因素影响生物降解.
科学领域:
- 聚合物科学 聚合物科学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 纤维素酸 (CA) 是过器和片中广泛使用的聚合物.
- 它的抗退化能力给环境污染带来了重大挑战.
- 了解CA降解对于制定有效的处置和利用策略至关重要.
研究的目的:
- 为了研究CA在各种水性环境中的降解性能.
- 评估pH值,盐度和微生物对CA降解的影响.
- 在不同的条件下阐明CA的降解机制.
主要方法:
- 在16周的时间里,CA拖和薄膜在HCl,NaOH,河水,海水和家庭制造的海水中进行了降解.
- 通过体重减轻率,替代程度,水友性,分子结构和表面形态分析来评估降解.
主要成果:
- 在NaOH溶液中,CA降解速度最快 (40.29%的重量损失在拖上,39.63%的重量损失在薄膜上) 和HCl溶液中.
- 与CA薄膜相比,CA拖表表现出更好的降解性能.
- 在河水,海水和家庭制造的海水中降解是最小的 (<3%的体重损失).
结论:
- 环境的酸度和度强烈促进了CA的非酶性水解.
- 高度的无机盐也可以增强CA水解.
- 微生物种群和类型是CA生物降解的关键决定因素.
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