微波加热下含铬革屑助废弃竹屑的半液化  

Chromium-containing leather shavings assisted semi-liquefaction of waste bamboo under microwave heating

作　　者：蒲红霞 戴睿[1] 单志华[1] PU Hongxia;DAI Rui;SHAN Zhihua(National Engineering Research Center for Tannery Clean Technology,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]四川大学制革清洁技术国家工程研究中心,四川成都610065

出　　处：《精细化工》2021年第6期1264-1270,共7页Fine Chemicals

基　　金：四川大学-自贡2019年校地科技合作专项资金项目(2019CDZG-10)。

摘　　要：以废弃竹屑为原料,在含铬革屑(LS)、盐酸和少量苯酚微波辅助形成的液化助剂作用下,制备了一种半液化竹粉,用于竹木板材的黏合。采用单因素实验,考察液化时间、液化温度、LS用量以及液固比[m(水)∶m(竹粉)]对液化效果的影响。用FTIR、SEM与DSC表征分析了竹粉半液化前后差别。在LS用量为12%(以竹粉质量为基准,下同),液固比为5∶1,微波加热温度150℃反应15 min的条件下,竹粉的液化率可达60.95%。结果表明,LS对竹粉具有催化液化作用,且制备的液化产品作为黏合剂制备胶合板能满足GB/T 9846—2015《普通胶合板》中Ⅱ类胶合板指标。该研究为两种废弃物的资源化利用提供参考。A semi-liquefied bamboo powder for the bonding of bamboo and wood boards was prepared using waste bamboo as raw material under the action of a liquefaction aid formed by chromium-containing leather shavings(LS), hydrochloric acid and a small amount of phenol under microwave heating. The effects of liquefaction time, liquefaction temperature, LS dosage and liquid-solid ratio [m(water)∶m(bamboo powder)] on the liquefaction effect were investigated by single-factor experiments. The difference of bamboo powder before and after semi-liquefaction was analyzed by FTIR, SEM and DSC. When LS addition amount was 12%(based on the mass of bamboo powder, the same below), liquid-solid ratio was 5∶1, microwave heating temperature was 150 ℃ and reaction time was 15 min, the liquefaction rate of bamboo powder could reach 60.95%. The results showed that LS had a catalytic liquefaction effect on bamboo powder, and the prepared liquefied product could be used as a binder to prepare plywood and met the category Ⅱ plywood index in GB/T 9846—2015 "Plywood for general use". This study provides a reference for the resource recycling of the two wastes.

关 键 词：废弃竹子 铬革屑 半液化 催化 微波 黏合剂 

分 类 号：X72[环境科学与工程—环境工程]