木质素磺酸钠在浓溶液中聚集行为的研究  

Researches on Aggregation Behaviors of Sodium Lignosulfonate in Concentrated Solutions

作　　者：邱学青[1] 汤潜潜[1] 周明松[1] 许锐林 杨东杰[1] 

机构地区：[1]华南理工大学化学与化工学院广东省绿色化学产品技术重点实验室,广州510640

出　　处：《高分子学报》2014年第12期1585-1592,共8页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号21476092);国家国际科技合作专项(项目号2013DFA41670);国家重点基金研究发展计划(973计划;项目号2012CB215302);广东省重大科技专项(项目号2012A080105012)资助项目

摘　　要：利用流变和电导等实验手段研究了木质素磺酸钠(SL)在浓溶液中的聚集行为,讨论了无机盐(Na Cl、Na2SO4)、尿素及直链醇(甲醇、乙醇、正丙醇)对SL聚集行为的影响.结果表明,无机盐会促使较大SL聚集体的形成,而尿素可破坏聚集体的形成;少量直链醇加入将不利于SL聚集体的形成,但是过量醇的加入又会有利于SL聚集体的形成.从静电、氢键和疏水作用等不同角度对SL在浓溶液中的聚集行为进行了合理解释.Rheology and conductivity techniques were used to systematically investigate the aggregation behaviors of sodium lignosulfonates（SL） in the concentrated solutions,and the influences of inorganic salts（Na Cl,Na2SO4）,ureas and straight-chain alcohols（methanol,ethanol,n-propanol） on the aggregation behaviors of the concentrated SL solutions were also explored.The experimental results indicated that the addition of inorganic salts was in favor of the electrostatic repulsion shielding effect and the solvent polarity enhancement,which promoted the formation of larger SL aggregates,however,the result was just opposite after the addition of ureas due to the destruction of hydrogen bondings and the weakening of aggregation interactions.In the meantime,when a small amount of straight-chain alcohols were added in the SL solutions,their non-polar carbon chains could insert into the hydrophobic cores of SL aggregates,which resulted in the decrease of the aggregation degree.However,the excessive addition of straight-chain alcohols was favorable to the formation of aggregates.This may be attributable to the increase of the hydrophobic interaction and the aggregation degree,which was caused by the raised p H.Based on electrostatic repulsions,hydrogen bondings and hydrophobic interactions,the aggregation behaviors of SL in the concentrated solutions were explained reasonably.

关 键 词：木质素磺酸钠 浓溶液 聚集行为 流变行为 机理 

分 类 号：O631.1[理学—高分子化学]