Synthesis and Characterization of Cellulose Acetate Blend Ultrafiltration Membranes： The Effect of Degrees of Substitution

Abstract

Cellulose acetate (CA), a hydrophilic membrane material, was selected to prepare ultrafiltration membrane for the aim of achieving high-performance membranes with respect to flux and rejection characteristics. In order to prepare membranes with improved properties, blending of cellulose acetates with different degrees of substititution(DS) has been attempted. In this study, polymeric blend ultrafiltration membranes based on cellulose acetate with different DS were prepared by phase inversion technique. Scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle are used to understand the influence of DS on the properties of modified membranes. The blend membranes prepared were subjected to the separation of egg albumin (EA). The separation and permeate flux efficiencies of the blend membranes were discussed.

High Performance Study of Lithium Carboxymethylcellulose as Water‐Soluble Binder for Lithium Supplementation in Lithium Batteries

“…Binders are an indispensable part of lithium-ion batteries and play an important role in improving the performance of lithiumion batteries, especially in the cycle performance. [1][2][3] Due to the hydroxyl and carboxymethyl groups contained in Carboxymethyl cellulose Sodium (CMC-Na), it is easier to connect with siliconbased or C-based negative electrode materials through chemical bonds (covalent bonds or hydrogen bonds), and the bonding force is stronger, which can maintain the connection with Si particles. [4] And it is easy to form a good coating of the solid electrolyte phase interface film (SEI) to inhibit the decomposition of the electrolyte.…”