磷酸化壳聚糖包覆蒙脱土纳米材料的制备及其性能

兰州理工大学学报 ›› 2024, Vol. 50 ›› Issue (6): 28-32.

磷酸化壳聚糖包覆蒙脱土纳米材料的制备及其性能

高瑜^*, 康成虎

吕梁学院物理与电子信息工程系, 山西吕梁 033001

收稿日期:2023-12-22 出版日期:2024-12-28 发布日期:2025-01-13
通讯作者: 高瑜(1989-),男,山西吕梁人,助教.Email:20181089@llu.edu.cn
基金资助:
山西省青年科学基金(202103021223385),山西省高等学校科技创新计划(2022L563)

Preparation and properties of montmorillonite nanosheets modified with phosphorylated chitosan

GAO Yu, KANG Cheng-hu

Department of Physics and Electronic Information Engineering, Lyuliang University, Lyuliang 033001, China

Received:2023-12-22 Online:2024-12-28 Published:2025-01-13

摘要/Abstract

摘要： 通过机械球磨法用羟基硅油对钠基蒙脱土(MMT)进行纳米化与表面修饰,并将壳聚糖磷酸化.经油浴处理,在羟基硅油改性纳米化钠基蒙脱土表面进一步包覆磷酸化壳聚糖.借助X射线衍射仪(XRD)、傅立叶红外吸收光谱仪(FT-IR)、接触角测量仪(CA)、比表面积及孔径分析仪(BET)、热重分析仪(TGA)研究了MMT表面包覆磷酸化壳聚糖前后的晶型结构、表面特性、比表面积以及热稳定性的变化规律.结果表明:MMT经羟基硅油改性以及磷酸化壳聚糖表面包覆后,晶型结构没有发生明显变化,而在(001)晶面对应的衍射峰发生宽化,层状结构变差,片层发生剥离化.对于磷酸化壳聚糖包覆的MMT,表面疏水性增强,水接触角为62.7°,比表面积为13.812 m²/g,在MMT表面形成较厚的包覆层.

关键词: 钠基蒙脱土, 磷酸化壳聚糖, 纳米化, 表面特性

Abstract: Nanosizing and surface modification of Na-MMT were carried out using hydroxysilicone oil via mechanical ball milling techniques, and chitosan was phosphorylated. The phosphorylated chitosan was further applied to decorate exfoliated montmorillonite under oil bath treatment. The crystal structure, surface characteristics, specific surface area and thermal stability of MMT before and after surface modification with phosphorylated chitosan were systematically studied using X-ray diffraction (XRD), Fourier transform infrared absorption spectroscopy (FT-IR), contact angle measurement (CA), specific surface area and pore size analyzer (BET), and thermogravimetric analyzer (TGA). The results showed that after modification with hydroxysilicone oil and surface coating with phosphorylated chitosan, the crystal structure of MMT does not significantly changes. Nevertheless, the diffraction peak corresponding to the (001) crystal plane is widened, which means that the layered structure of Na-MMT is deteriorated and exfoliated. Furthermore, the surface hydrophobicity of MMT coated by phosphorylated chitosan is improved, with a water contact angle of 62.7°, and a specific surface area of 13.812 m²/g. In short, the phosphorylated chitosan presents a thicker coating layer on the surface of Na-MMT.

Key words: Na-MMT, phosphorylated chitosan, nanosizing, surface properties

中图分类号:

TB34

高瑜, 康成虎. 磷酸化壳聚糖包覆蒙脱土纳米材料的制备及其性能[J]. 兰州理工大学学报, 2024, 50(6): 28-32.

GAO Yu, KANG Cheng-hu. Preparation and properties of montmorillonite nanosheets modified with phosphorylated chitosan[J]. Journal of Lanzhou University of Technology, 2024, 50(6): 28-32.

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