Related Experiment Video
Updated: Jan 2, 2026
Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
Published on: July 11, 2012
Cellulose nanofibril-polymer hybrids for protecting drilling fluid at high salinity and high temperature
Xiongli Liu1, Zhaoyang Yuan2, An Wang1
1Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, China; Tianjin Woodelf Biotechnology Co. Ltd., Tianjin, 300457, China.
Abstract:
A copolymer (PADH) was first synthesized from 2-acrylamido-2-methylpropane sulfonic acid (AMPS), N,N-dimethylacrylamide (DMA), and 2-Hydroxyethyl acrylate (HEA) by UV-induced polymerization. Subsequently, cellulose nanofibrils (CNFs) were introduced into the copolymer through ironic cross-linking between ferric ions and carboxylate groups as well as sulfonic acid groups to produce a hybrid product (PADHC-Fe3+-3). The salt tolerance and thermal stability of the copolymers and the hybrid product were investigated. The results showed that the optimum HEA dosage was 5% (in relation to the total mass of AMPS and DMA). In addition, the fluid loss test showed that the hybrid product PADHC-Fe3+-3 had excellent salt tolerance (maximum tolerance: 26.5 wt% NaCl and 32 wt% combined salts) and thermal stability (maximum tolerance: 200 °C). The SEM images indicated that the filter cakes became denser after the addition of PADHC-Fe3+-3. The results demonstrated that the cross-linked hybrid product was very promising for industrial application in drilling engineering.
