木钠、改性木钠的微观结构及其在煤表面吸附膜厚度的测定  

STUDY ON MICROMECHANISM AND ADSORPTION FILM THICKNESS OF LIGNOSULPHONATE AND MODIFIED LIGNOSULPHONATE

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510631 [2]华南理工大学化工与能源学院,广东广州510640

出　　处：《华南师范大学学报（自然科学版）》2007年第2期85-88,共4页Journal of South China Normal University(Natural Science Edition)

基　　金：广东省科技计划资助项目(2003A3030102)

摘　　要：采用环境扫描电镜和椭圆测厚仪分别测定了木质素磺酸钠(以下称木钠)及改性木钠在溶液中的微观结构和在光滑的煤表面的吸附膜厚度,从微观结构和吸附膜厚度两方面揭示了改性木钠制浆性能优于木钠的内在原因.研究表明:改性木钠球形结构更加分散,簇状结构明显减少,对提高吸附效率,增加吸附量,最大程度地改善煤表面的疏水性极为有利;改性木钠的空间位阻作用与未改性木钠相比较,其表面吸附膜厚度增加1倍左右.The micromechanism is determined by ESEM and the adsorption film thickness is determined by elliptical polarization, which the smooth surface of coal adsorbs the lignosul- phonate and modified lignosulphonate. It is disclosed that the intrinsic reason why the pulping property of modified lignosulphonate is better than lignosulphonate. It is shown that the global structure of modified lignosulphonate is dispersive and less cluster structure to benefit the adsorption efficiency, the adsorption capacity and to improve the lyophobic surface of coal ; the film thickness is doubled by the comparison of lignosulphonate and modified lignosulphonate in the respect of the space steric hindrance.

关 键 词：改性木钠 吸附膜厚度 空间位阻 

分 类 号：TQ536[化学工程—煤化学工程]