Enawgaw Haymanot, Tesfaye Tamrat, Yilma Kelem Tiessasie, Limeneh Derseh Yilie
Biorefinery Research Center, Ethiopian Institute of Textile and Fashion Technology, Bahir Dar University, Bahir Dar P.O. Box 1037, Ethiopia.
Textile Chemistry Research and Innovation Center, Ethiopian Institute of Textile and Fashion Technology, Bahir Dar University, Bahir Dar P.O. Box 1037, Ethiopia.
Gels. 2021 Nov 27;7(4):236. doi: 10.3390/gels7040236.
Cellulose-based hydrogels were prepared by the extraction of cellulose from corncobs after the removal of lignin and hemicellulose with the use of alkali-acid treatment. Acrylate-based hydrogels presently available for personal hygiene uses are not biodegradable. In this study, a biodegradable cellulose-co-AMPS personal hygiene hydrogel was synthesized. The hydrogel was synthesized by graft co-polymerization of 2-acrylamido2-methyl propane sulfonic acid onto corncob cellulose by using potassium persulfate (KPS) as an initiator and borax decahydrate (NaBO·10HO) as a cross-linking agent. Structural and functional characteristics of the hydrogel such as swelling measurements, antimicrobial tests, FTIR spectra and thermogravimetric analysis were done. The hydrogel showed an average swelling ratio of 279.6 g/g to water and 83.3 g/g to a urine solution with a 97% gel fraction. The hydrogel displayed no clear inhibition zone and did not support the growth of bacteria, Gram-positive or -negative. The FT-IR spectra of the hydrogel confirmed the grafting of an AMPS co-polymer onto cellulose chains. The thermal properties of the hydrogel showed three-step degradation, with a complete degradation temperature of 575 °C.
通过使用酸碱处理去除木质素和半纤维素后，从玉米芯中提取纤维素来制备纤维素基水凝胶。目前可用于个人卫生用途的丙烯酸酯基水凝胶不可生物降解。在本研究中，合成了一种可生物降解的纤维素-共-AMPS个人卫生水凝胶。该水凝胶通过以过硫酸钾（KPS）作为引发剂、十水硼砂（NaBO·10HO）作为交联剂，将2-丙烯酰胺基-2-甲基丙烷磺酸接枝共聚到玉米芯纤维素上而合成。对该水凝胶的结构和功能特性进行了研究，如溶胀测量、抗菌测试、傅里叶变换红外光谱（FTIR）和热重分析。该水凝胶对水的平均溶胀率为279.6 g/g，对尿液溶液的平均溶胀率为83.3 g/g，凝胶分数为97%。该水凝胶没有显示出明显的抑菌圈，不支持革兰氏阳性或阴性细菌的生长。水凝胶的FT-IR光谱证实了AMPS共聚物接枝到纤维素链上。水凝胶的热性能显示出三步降解，完全降解温度为575℃。
