造纸黑液磺化及其改性氨基系减水剂的研究  

Sulphonation of black liquor and its modification on sulphanilic acid-phenol-formaldehyde condensates

作　　者：季栋[1] 马宏明[1] 史以俊[1] 何明[1] 罗振扬[1] 

机构地区：[1]南京林业大学理学院,南京210037

出　　处：《林业科技开发》2013年第1期78-81,共4页China Forestry Science and Technology

基　　金：国家自然科学基金(编号:50903043和51005123);江苏省生物质能源与材料重点实验室项目(编号:201001)

摘　　要：鉴于造纸黑液产量巨大以及氨基系减水剂(SPF)存在的弊端,以造纸黑液为原料制取磺化木质素,并将其用于改性SPF制得HSPF系列减水剂。考察了磺化木质素的磺化度与分子量,并在吸附量、Zeta电位、净浆流动度和泌水等方面考察了HSPF性能以及与GSPF系列减水剂(由市售木质素磺酸钠改性SPF制得)的差异。研究结果表明:磺化木质素中引入较多磺酸基,其磺化度为0.821 mmol/g,分子量为22.97 kDa;HSPF在吸附能力、吸附量、Zeta电位、净浆流动度等方面均优于GSPF,这缘于磺化木质素更高的磺化度和更适宜的分子量;磺化木质素更大的分子量也造成HSPF泌水率更低。Due to large amounts of black liquor and disadvantages of sulphanilic acid-phenol-formaldehyde condensates（SPF）,sulphonated lignin was prepared from black liquor and applied to the modification of SPF.A series of superplasticizers called HSPF were produced.The sulphonation degree and molecular weight of sulphonated lignin were investigated,as well as the properties of HSPF and differences between GSPF（commercially available sodium lignosulphonate modified SPF） in various aspects of adsorption,adsorption capacity,zeta potential,paste fluidity,and bleeding.The results showed that considerable sulphonic groups were brought into sulphonated lignin,and the sulphonation degree and molecular weight of which were 0.821 mmol/g and 22.97 kDa,respectively.HSPF exhibited better performance on adsorption,adsorption capacity,zeta potential,and paste fluidity,resulting from the higher sulphonation degree and more appropriate molecular weight of sulphonated lignin.The lower bleeding rate of HSPF was caused by the larger molecular weight of sulphonated lignin.

关 键 词：造纸黑液 磺化 减水剂 吸附 泌水 

分 类 号：TQ433.431[化学工程]