林业工程学报2018，Vol.3Issue(2)：102-108,7.DOI:10.13360/j.issn.2096-1359.2018.02.017
硫氰酸钾/乙二胺(KSCN/ED)体系制备纤维素水凝胶
Preparation of cellulose hydrogels by potassium thiocyanate/ethylenediamine solvent
摘要
Abstract
In this study,the cellulose hydrogel was prepared by dissolving pulp fibers in the potassium thiocyanate/eth?ylenediamine(KSCN/ED)solvent.The effects of dissolution concentration,dissolution time and dissolution tempera?ture on the properties of hydrogel were explored. The transmittance,compression properties,morphological,spectro?scopic,crystal properties and thermal properties of hydrogel were investigated by using the rotary rheometer,UV?visi?ble spectrophotometer,electronic universal testing machine,scanning electron microscopy(SEM), Fourier transfor?mation infrared spectroscopy(FT?IR), X?ray diffraction(XRD)and thermographic analyzer(TGA). The results showed that,with the dissolution time duration of 4 h,dissolution temperature of 90℃ and cellulose concentration of 4%,the cellulose hydrogel presented high light transparency of more than 80%. The stress?strain curves showed a non?linear characteristic, indicating that the prepared material had good viscoelasticity. The cellulose hydrogels were composed of the uniform spherical particles with the diameter ranging from 10 nm to 50 nm and dense porous three?di?mensional network structure. The results of the X?ray diffraction patterns revealed that the pulp fiber had been trans?formed into the cellulose II crystal structure after the treatment with KSCN/ED solvent. The results of TGA analysis showed that the thermal decomposition temperature of cellulose hydrogels was 315.8℃,and the thermal stability was lower than that of pulp fibers. The cellulose hydrogels were successfully prepared by the method of cellulose dissolu?tion through KSCN/ED solvent. This method had many advantages in this dissolving system, e.g., the KSCN/ED solvent could dissolve the cellulose completely under mild temperature conditions,the reagents used were not expen?sive,and the preparation process of hydrogel was easy to operate. In summary,since the cellulose hydrogels prepara?tion method is simple,high?efficiency and recyclable,it can provide a new way for the efficient preparation of cellu?lose?based hydrogels. The cellulose hydrogels with the characteristics of high light transmittance and excellent mechan?ical properties have potential application in the field of biological tissue engineering.关键词
硫氰酸钾/乙二胺/纤维素/溶解/水凝胶Key words
potassium thiocyanate/ethylenediamine/cellulose/dissolve/hydrogel分类
农业科技引用本文复制引用
汪雪琴,李现艳,卢麒麟,林凤采,卢贝丽,林咏梅,黄彪..硫氰酸钾/乙二胺(KSCN/ED)体系制备纤维素水凝胶[J].林业工程学报,2018,3(2):102-108,7.基金项目
国家林业公益性行业科研专项(201504603) （201504603）
国家自然科学基金(31370560,21402027). （31370560,21402027）
