均质法和超声法制备NFC及其纳米纸性能研究

发布时间：2018-03-26 03:47

本文选题：均质　切入点：超声　出处：《中国造纸》2016年07期

【摘要】：以漂白硫酸盐桉木浆纤维为原料,进行TEMPO氧化预处理,再采用均质法和超声法及二者结合法分别制备出纳米纤丝纤维素(Nanofibrillated Cellulose,NFC),再经溶液浇铸法制备纳米纸。重点探讨了不同制备方法对NFC特性及其纳米纸性能的影响。结果表明,不同能耗下,超声2 h、4 h比均质2次、5次制备的NFC的透明性更好,长径比更大,直径更小,最小宽度可达19 nm。工艺能耗低于20 k Wh时,与均质处理相比,超声处理强度(能耗)的增加更有利于纳米纸拉伸强度和透湿率的提高,同时超声2 h、4 h比均质2次、5次制备的NFC纳米纸的光学性能更好,其中超声4h制备的NFC得到的纳米纸拉伸强度与透光率最高,分别为155.8 MPa、89.45%,优于一般的聚合物薄膜,有望应用于柔性显示电子器件的基材。
[Abstract]:The Bleached Eucalyptus Kraft pulp fiber as raw material, TEMPO oxidation pretreatment, using homogenization method and ultrasonic method and the combination of the two methods were prepared by nano cellulose fibrils (Nanofibrillated Cellulose, NFC), followed by the preparation of nano paper casting solution was discussed. The effects of preparation methods on the performance characteristics of NFC paper and nano. The results show that the different energy consumption under ultrasound 2 h and 4 h than homogeneous 2 times, 5 times of NFC prepared by transparency better, higher aspect ratio, smaller diameter, minimum width of up to 19 nm. process consumption below 20 K Wh, compared with the homogenization treatment, ultrasonic treatment intensity (energy) increased more conducive to nanopaper tensile strength and moisture increased, at the same time, ultrasonic time of 2 h, 4 h than homogeneous 2 times, 5 times the NFC nano paper better optical properties, including tensile nanopaper ultrasonic 4h NFC prepared by the strength and the highest light transmittance, respectively 1 55.8 MPa, 89.45%, superior to the general polymer film, is expected to be applied to the substrate of flexible display electronic devices.

【作者单位】：华南理工大学制浆造纸工程国家重点实验室;
【基金】：国家“973”计划项目(2010CB732206) 2013广东省部产学研专项资金技术前沿项目(2013B090500071)
【分类号】：TS71

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