3D打印纳米纤维素凝胶材料

3D printing nano cellulose gel material

纤维素纳米晶体(CNCs)具有较好的制备性能,结晶度高、机械刚度大、强度高。然而,CNCs的高分散性限制了其可纺丝性。研究表明,对纳米纤维素氧化改性可以提高和优化材料的整体性能。选择氧化的纳米纤维素获得带有羧基的区域氧化CNCs(RO-CNC),利用多硫化钠(Na_(2)S_(x))对CNCs末端区域进行氧化改性,制备了末端氧化纳米纤维素。对CNCs的形态进行表征,使用激光扫描制备的纤维素凝胶经诱导固化形成3D打印新材料。

Cellulose nanocrystals(CNCs)have high preparation properties,high crystallinity,high mechanical stiffness and strength.However,the high dispersion of CNCs results in its limited spinability.The results show that the overall properties of nanocellulose can be improved and optimized by oxidation modification.Oxidized nanocellulose is selected to obtain regional oxidized CNCs(RO-CNC)with carboxyl group,and sodium polysulfide(Na_(2)S_(x))is used to oxidize the end region of CNCs to prepare the end oxidized nanocellulose.The morphology of CNCs is characterized.The cellulose gel prepared by laser scanning is induced and solidified into a new material for 3D printing.