竹炭负载氯化钙复合干燥剂的研究  

Study on Bamboo Charcoal/Calcium Chloride Composite Desiccant

作　　者：张文标[1] 宋海桐[1] 方小龙[1] 华文礼[2] 

机构地区：[1]浙江林学院工程学院,临安311300 [2]浙江省遂昌县林业局,遂昌323300

出　　处：《林产工业》2009年第3期17-19,共3页China Forest Products Industry

基　　金：浙江省科技厅重大招标项目《利用竹材生产功能炭素的关键设备及生产工艺的研发》

摘　　要：笔者利用竹炭和氯化钙作为原材料,通过三种不同负载工艺,研制了竹炭、氯化钙的复合干燥剂。采用静态法测定三种竹炭复合干燥剂在高、低湿度下的吸湿量的变化情况,并与变色硅胶比较。同时运用电子扫描电镜观察氯化钙在竹炭表面的分布情况,结果表明:(1)三种工艺生产的竹炭复合干燥剂的吸湿性能都优于硅胶。(2)第三种工艺生产的竹炭复合干燥剂吸湿性最好,在RH=(80±1)%,T=(20±1)℃的高湿条件下,吸湿量达到40%;在RH=(40±1)%,T =(20±1)℃的低湿条件下,吸湿量达到24%。(3)通过电子扫描电镜观察,氯化钙分布在竹炭的内外表面,两者结合良好。因此,利用竹炭环保、价廉等特性,开发新型的竹炭基复合干燥剂是可行的。3 kinds of bamboo charcoal/calcium chloride desiccant were prepared by using 3 different loading processes respectively. The hygroscopic capabilities of the composite desiccants were determined with static method and compared to that of silica gel. The result showed ： （ 1 ） The hygroscopic capabilities of all kinds of composite desiccants were better than that of silica gel. （2） The composite desiccant prepared using 3rd process had the best hygroscopic capability ; under the high humidity condition [ RH=（80±1）%,T=（20±1）℃] its hygroscopic capacity reached 40%, while under low humidity condition [ RH = 40%, T = （20±1）℃] reached 24%. （ 3 ） SEM results showed calcium chloride was located on inside and outside surface of bamboo charcoal and well coalesced. Because bamboo charcoal/calcium chloride composite desiccant has excellent hygroscopic capacity and is free from pollution and low cost, it is feasible to development the new composite desiccant.

关 键 词：竹炭 复合干燥剂 吸湿性能 

分 类 号：O647.3[理学—物理化学]