AUTHOR=Bi Zhanjian , Teng Haifeng , Li Qiujing , Zhang Shukun 

TITLE=Enhanced Carboxymethylcellulose Sponge for Hemostasis and Wound Repair

JOURNAL=Frontiers in Materials

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2022.944274

DOI=10.3389/fmats.2022.944274

ISSN=2296-8016

ABSTRACT=<p>Skin is the interface between human beings and the outside world. After skin injury, bleeding control and wound protection is urgently needed. In the study, the carboxymethyl cellulose/carboxymethyl chitosan-polydopamine (CMC/CMCS-PDA) sponge is prepared for skin hemostasis and repair. The self-polymerization of dopamine (DA) and cross-linking between DA and CMCS are simultaneously completed by Michael addition reaction to form CMCS-PDA under alkaline conditions. CMCS-PDA is introduced into the CMC sponge by EDC/NHS to improve the hemostasis ability and wound repair. By increasing the dosage of CMCS to get CMC/CMCS-PDA<sub>1</sub>, CMC/CMCS-PDA<sub>2,</sub> and CMC/CMCS-PDA<sub>3</sub> sponges, and the stability of CMC/CMCS-PDA sponge is improved with the increasing addition of CMCS. Compared with a simple CMC/PDA sponge, CMC/CMCS-PDA sponge has a high hemostatic effect for its dispersion stability and CMC/CMCS-PDA2 exhibits the best hemostatic ability with proper crosslinking. At the same time, the prepared CMC/CMCS-PDA sponge has good antibacterial and antioxidant properties. Rat skin wound model showed that CMC/CMCS-PDA sponge can better promote wound repair. Therefore, CMC/CMCS-PDA sponge could be a potential wound dressing for skin hemostasis and repair.</p>