造纸竹浆黑液的接枝磺化工艺及高效减水剂  

Graft Sulfonation Process of Bamboo Pulp Black Liquor Used as Superplasticizer

作　　者：楼宏铭[1] 刘青[1] 张海彬[1] 吴玲英[1] 邱学青[1] 

机构地区：[1]华南理工大学化学与化工学院,制浆造纸工程国家重点实验室,广东广州510640

出　　处：《高分子材料科学与工程》2009年第6期103-106,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20676040);广东省自然科学基金重点项目(05103536);广东省科技计划项目(2006A37002001)

摘　　要：对竹浆黑液的接枝磺化工艺进行了优化,研究了亚硫酸钠、甲醛用量及温度对磺化产品减水分散性能和特性黏度的影响规律。结果表明,亚硫酸钠及甲醛用量对磺化改性产品的分散性能影响较大。优化的磺化工艺为:m(S)∶m(L)=0.72,m(F)∶m(L)=1.82,磺化温度为55℃,缩合温度为98℃。优化产品GCL1-JB的特性黏度为6.7mL/g,磺化度为2.3mmol/g。掺GCL1-JB的水泥净浆流动度达到FDN的水平,GCL1-JB具备一定的缓凝效果。The graft sulfonation process of bamboo pulp black liquor was optimized in this paper. The effect of sodium sulfite, formaldehyde and temperature on the performance of sulfonated product was researched in experiments. The results show that sodium sulfite and formaldehyde affect evidently the dispersion to cement of sulfonated product. The optimizing product GCL1-JB is prepared in condition of m（s） ： m（L） = 0.72, m（F） ： m（L） = 1.82, sulfonation reaction temperature of 55 ℃ and condensation reaction temperature of 98 ℃. The product gets best dispersion when its inherent viscosity and sulfonation degree is 6.7 mL/g and 2.3 mmol/g respectively. The fluidity of cement paste mixed with GCL1-JB can reach FDN. GCL1-JB also has a retardation effect.

关 键 词：造纸竹浆黑液 接枝磺化 混凝土 高效减水剂 

分 类 号：TQ316.343[化学工程—高聚物工业]