Study on the Structure Characterization and Swelling Properties of the CMSM

Abstract

Abstract In order to further understand the potential applications of cellulose membrane materials in adsorption, drug delivery, and biomedical applications, to optimize their material properties, improve their performance, and expand their application fields, carboxymethyl Salix powder (CMS) was prepared by etherification reaction using Salix powder (SPP) as the raw material. Carboxymethyl Salix powder membrane (CMSM) was subsequently prepared through wet spinning technology. The swelling properties of CMSM were investigated. The results showed that the swelling degree reached the maximum at 45 minutes, pH 5, temperature of 65°C, and a NaCl concentration of 0.04 mol/L, reaching 7.95 g/g. Through model fitting, it was found that CMSM fits well with the Fickian diffusion model in the early stage, while the entire swelling process fits well with the Schott model. Characterization results indicate that the structure of CMSM is loose, porous, and uneven on the surface. This structure facilitates the diffusion of water molecules and enhances the water absorption performance of CMSM. The structure of CMSM is similar to the disordered structure of glass or plastic, presenting an amorphous structure. Additionally, CMSM exhibits good thermal stability. Key wards: Cellulose membrane; Swelling property; SPP; CMS ———— Xiaokai Liu and Hao He contributed equally to this work.(779960624@qq.com; hehao030533@163.com) Corresponding author at: College of Material Science and Art Design, Inner Mongolia Agricultural University. Hohhot 010018, China E-mail address: wlndcl@126.com (Li.Wang)