微波加热下含铬革屑助废弃竹屑的半液化

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

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，用于竹木板材的粘合。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对比表征分析了竹粉半液化前后差别。在LS添加量为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%。液化率证明LS对竹粉具有催化液化作用，且制备的液化产品作为粘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，为两种废弃物的资源循化利用提供参考。

Abstract:

Using waste bamboo as raw materials, a semi-liquefied bamboo powder was prepared for the bonding of bamboo and wood boards under the action of a liquefaction aid formed by chromium-containing leather shavings (LS), hydrochloric acid and a small amount of phenol. Single factor experiment was used to investigate the influence of liquefaction time, liquefaction temperature, the dosage of LS and liquid-solid ratio on the effect of liquefaction. The difference of bamboo powder before and after semi-liquefaction was analyzed by FTIR, SEM and DSC. Under the conditions of 12% LS addition, a liquid-solid ratio of 5:1, and a microwave heating temperature of 150 ℃ for 15 min, the liquefaction rate of bamboo powder can reach 60.95%. The liquefaction rate proves that LS has a catalytic liquefaction effect on bamboo powder, and the prepared liquefied product can be used as a binder to prepare plywood to meet the category II plywood index in GB/T 9846-2015 "Ordinary Plywood". Therefore, it provides reference for the recycling utilization of two kinds of waste resources.is heated to the reaction temperature of 150 ℃ for 15 min. The liquefaction rate of bamboo powder reaches 60.95 %. It is proved that the chromium-containing leather shavings can catalyze the liquefaction of bamboo powders, and the liquefied product can meet the requirements of plywood adhesive, which provides a reference for the recycling utilization of two kinds of waste resources.