基于OCC的纤维素纳米纤丝制备及其对废纸造纸增强作用研究  

OCC-based Cellulose Nanofibril and Its Reinforcing Effect on Recycled Papermaking

作　　者：刘亚丽 张素风 李楠 李磊 朱新月 邓婷婷 LIU Yali;ZHANG Sufeng;LI Nan;LI Lei;ZHU Xinyue;DENG Tingting(Cllge of Bioresources Chemical and Materials Engineering,Shaani University of Science&Technology,Xi'an,Shaanxi Province,710021)

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021

出　　处：《中国造纸》2023年第2期20-28,共9页China Pulp & Paper

基　　金：陕西省专家服务计划(2022WGZJ-11);中国-中东欧大学联合办学项目(2021099);陕西省重点产业创新链项目(2020ZDLGY11-03);纤维素生物转化中酶/细胞共固定体系的构建及机制研究(20210407)。

摘　　要：采用高锰酸钾氧化预处理废旧箱纸板(OCC),使其达到微纤维分离点,结合轻微的均质处理高效获得OCC基纤维素纳米纤丝(OCNF),得率约为70%。最优条件下制备的OCNF具有良好的纳米尺寸,长径比高达313,Zeta电位-21.0 mV,结晶度为69.23%,OCNF薄膜具有良好的力学性能(应力为44.16 MPa,应变为5.82%,弹性模量为2.55 MPa)及光学性能(透光率约为60%)。添加5%OCNF所抄纸张的抗张指数、撕裂指数及耐折度分别提升了27.74%、40.97%和228.57%。同时,白水的质量也得以大幅改善,浊度、悬浮物、CODCr分别降低了59.10%、48.08%和42.17%。Old corrugated container(OCC) was pretreated oxidation by potassium permanganate, reaching the microfiber separation point, then combined with a slight homogenization treatment. The OCC-based cellulose nanofiber(OCNF) was efficiently obtained with a yield of approximate 70%. The OCNF had good nanometer size with the aspect ratio of 313, the Zeta potential was-21. 0 mV, and the crystallinity was 69. 23%. The OCNF films had good mechanical properties(stress of 44. 16 MPa, strain of 5. 82%, and elastic modulus of 2. 55 MPa) and optical properties(transmittance of approximate 60%). The obtained 5% OCNF was applied to OCC papermaking, and the tensile index, tear resistance index, and folding endurance of recycled paper increased by 27. 74%, 40. 97%, and 228. 57%, respectively. The quality of white water had also been greatly improved, and the turbidity, suspended solids, and CODCrhad been reduced by 59. 10%, 48. 08%, and 42. 17%, respectively.

关 键 词：OCC 高锰酸钾 纤维素纳米纤丝 废纸造纸 白水 

分 类 号：TS724[轻工技术与工程—制浆造纸工程]