木质素磺酸钠、改性木质素磺酸钠用作水煤浆添加剂在煤表面吸附膜厚度的测定  

Determination of Adsorption Film Thickness of Lignosulphonate and Modified Lignosulfonate on Coal Surface as Coal-water Slurry Additives

作　　者：张延霖[1] 邱学青[2] 杨东杰[2] 

机构地区：[1]华南师范大学化学与环境学院,广东广州510006 [2]华南理工大学化工与能源学院,广东广州510640

出　　处：《林产化学与工业》2007年第4期47-50,共4页Chemistry and Industry of Forest Products

基　　金：广东省科技计划项目资助(2003A3030102)

摘　　要：简要介绍了木质素磺酸钠(简称木钠,LS)用作水煤浆添加剂的改性方法及结果,并采用椭圆偏振法测定了木钠及改性木钠(MLS)在光滑的煤表面和载波片表面的吸附膜厚度,定量地对比了添加剂在固体表面吸附的空间位阻作用的大小。通过研究可知:改性木钠的空间位阻作用与木钠相比较,其表面吸附膜厚度增加1倍左右,改性木钠的分散作用大大增强;木钠及改性木钠在疏水性和亲水性固体表面的吸附层厚度不同,其分子疏水链段的增加有利于增大其在疏水性(煤)表面的吸附厚度。It is introduced briefly the modification way and result of lignosulphonate （LS） as coal-water slurry （CWS） additive and determination of the adsorption film thicknesses of the LS and modified lignosulphonate （MLS） on the smooth surface of coal and microscopic slide by the method of elliptical polarization. The size of the space steric hindrance between LS and MLS adsor- bing on the solid surface were quantitatively compared. Results showed that the adsorption film thickness of MLS is doubled com- paried to LS. The thicknesses are different on the lyophobic surface and hydrophilic surface. It is favorable for the increase of the adsorption film thickness by increasing the lyophobic chain. The determination of adsorption film thickness verifies the validity of the modification result.

关 键 词：木质素磺酸钠 吸附膜厚度 椭圆偏振 环境扫描电镜 

分 类 号：TQ53[化学工程—煤化学工程]