摘要
木质素磺酸盐用丙酮法从木材和荻苇亚硫酸盐制浆废液中分离出，并经SephadexG－50柱进一步纯化，然后测定官能团含量和分子量分布。在H2O2－Fe（Ⅱ）催化作用下，两种浓红液用丙烯酸进行接枝改性得共聚产物，然后作了表面张力试验和对水中难溶性盐如硅酸钙、磷酸氢钙和硫酸钙的分散性试验。结果表明，木材木质素磺酸盐比荻苇木质素磺酸盐分子最高、磺酸基和酚羟基含量高，但羧基含量低。接枝改性前后的样品均有一定的表面活性和分散性。改性后的样品比改性前的样品分散性能明显提高。但不论是改性前的样品还是改性后的样品均显示出木材优于荻苇。
Lignosulfonates were obtained from the sulfite pulping spent liquor of wood andreed by adding acetone and were purified by passing the sephadex G-50 column. Then, thecontents of the sulfonic acid, carboxyl and phenolic-hydroxyl group and the molecularweight distribution pattern were determined. The lignosulfonates were modified by graftingwith acrylic acid in a H2O2-Fe (Ⅱ) redox system. The surface tension and dispersion test forCaSiO3, CaSO4 and CaHPO4 of the lignosulfonates and graft copolymiers were determined.The results showed that the wood Hgnosulfonate had higher contents of suLfonic acid andphenolic-hydroxyl, a lower content of carboxyl and a higher average moLecuLar weight thanthe reed lignosulfonate; all sample could slightly reduce the surface tention: the woodlignosulfonate had a higher dispersive properties than the reed lignosulfonate. The graftcopolymerization of lignosulfonates with acrylic acid could greatly improve the dispersiveproperties. The two graft copolymers all had a good dispersive properties.
出处
《纤维素科学与技术》
CAS
CSCD
1996年第2期31-36,共6页
Journal of Cellulose Science and Technology
基金
国家自然科学基金
关键词
木质素磺酸盐
丙烯酸
接枝共聚
分散性
水处理剂
lignosulfonate, acrylic acid, graft copolymerization, dispersive property
