纤维素科学与技术2018，Vol.26Issue(2)：24-30,7.DOI:10.16561/j.cnki.xws.2018.02.10
利用碱处理纳米纤维素制备三维网状水凝胶的研究
Study on Three-Dimensional Network Cellulose Nanofiber Hydrogel by Using Alkali Treatment
摘要
Abstract
In this paper, pinus sylvestris wood flour was used as raw material. Cellulose nanofibers (CNF) were obtained by chemical and mechanical treatment. Wet CNF membrane was prepared by filtration. Then the wet CNF membrane was treated in NaOH solution of different concentrations to prepare CNF hydrogel. The shrinkage, crystal structure, morphology and mechanical properties of the hydrogel were analyzed. X-ray diffraction analysis shows that when the concentration of alkali solution is greater than 12%(wt), the crystalline form of the hydrogel is transformed from cellulose Ⅰ to cellulose Ⅱ. Scanning electron microscope observation reveals that the surface morphology of CNF wet film is changed greatly after strong alkali treatment, and interlacing between nanofibers appears, showing a continuous tangled three-dimensional network structure and porous structure. The mechanical analysis shows that the optimum NaOH concentration for preparing high strength hydrogel is 18%(wt). And the high strength hydrogel with tensile strength of 4.8 MPa, elastic modulus of 11.7 MPa and elongation at break of 31.2% was made by 18%(wt) NaOH treatment.关键词
纳米纤维素/碱处理/水凝胶/晶型结构/力学性能Key words
cellulose nanofiber/alkali treatment/water hydrogel/crystal structure/mechanical property分类
通用工业技术引用本文复制引用
王海莹,陈诺,丁颖,潘婷婷,李大纲..利用碱处理纳米纤维素制备三维网状水凝胶的研究[J].纤维素科学与技术,2018,26(2):24-30,7.基金项目
江苏省自然科学青年基金(BK20150875) （BK20150875）
江苏高校品牌专业建设工程资助项目(TAPP) （TAPP）
国家自然基金(NSFC 31670555). （NSFC 31670555）
