沙柳液化预处理及产物制备保温材料与研究.pdf

摘要

为减少能源消耗,开发低碳环保的保温材料,本文运用生物质液化技术将沙柳
木粉的液化产物生产墙体保温材料。为提高其生产可行性,本文对液化前的预处理
和保温材料的性能影响因素进行了探究。结果如下:
1、利用微波处理分别与化学处理进行组合可以强化预处理效果。一是由于酸、
碱或盐的加入,使体系中带电粒子数量增加,强化了微波处理的效果;二是由于微
波的作用可以提高植物纤维的渗透性、增大化学试剂与沙柳接触的可及度并能提高
预处理温度,强化了化学处理的效果。在微波与 1%H2SO4 溶液的复合预处理 7min,
沙柳木粉在 30min 内几乎完全液化。
2、经过分析,复合处理没有改变沙柳木粉的化学结构,但复合预处理降解了部
分木质素、半纤维素和纤维素,降低了沙柳纤维的结晶度。
3、在利用沙柳液化产物进行聚氨酯发泡时,通过调节催化剂、成核剂和异氰酸
酯用量等因素改善材料的性能。结果发现:锡类催化剂对材料性能影响较大;成核
剂会使泡沫材料的泡孔细密且分布均匀;异氰酸酯的用量是材料性能的重要影响因
素之一。综合来说,在催化剂辛酸亚锡用量 6%、成核剂 CaCO3 用量 4%、异氰酸酯用
量 100%的情况下,泡沫材料的密度和保温材料的力学性能都达到最佳值。

关键词:沙柳;液化;预处理;保温材料
Research on the liquefaction pretreatment of salix and their
products preparation insulation Materials

Abstract
The development of low-carbon environmental protection Insulation materials to
reduce energy consumption, we use of biomass liquefaction technology to liquefied S.
psammophila and product wall insulation materials with liquefied products. To increase
production feasibility, We studied pretreatment prior to liquefaction and factors
influencing the Performance on insulation material. Results are as follows:
1. The use of microwave bined with chemical treatment can
strengthen the effect of pretreatment. First, because of the acid, alkali or salt added, so
that increase in the number of charged particles in the system to enhance the effect of the
microwave , The role of the microwave can improve the permeability of
plant fiber, increase and degreethe of Salix wood flour and chemical reagents and can
improve the pretreatment temperature to strengthen the effect of the chemical treatment.
posite pretreatment in the microwave with 1% H2SO4 solution in 7min, Salix
wood flour pletely liquefied in 30 minutes.
2. After analysis, posite processing does not change the chemical structure of
Salix wood flour ,posite pretreatment degradation of lignin, hemicellulose and
cellulose, reducing the degree of crystallinity of the fibers of salix.
3. I