四川大学学报：工程科学版2012，Vol.44Issue(1)：166-172,7.
有机酸结构对α半水脱硫石膏晶体形貌的影响及其调晶机理
Influnce of Organic Acid Structure on Crystal Morphology of α-hemihydrate Desulfurization Gypsum and Its Crystal Modification Mechanism
摘要
Abstract
The influence of carboxyl number,carboxyl distance,and other auxiliary groups such as hydroxyl,double bond and its cis/trans-structure of organic acid on the crystal morphology of α-hemihydrate desulfurization gypsum were studied.The crystal modification mechanism of organic acids was analyzed from the point of adsorption and crystal growth.The results showed that monoacid has no crystal modifying effect,while dibasic acid or polybasic acid with carboxyl distance of three C atoms such as succinic acid and citric acid are highly efficient crystal modifying agents.Adjacent hydroxyl groups have aid-modifying function to organic acids.Cis-structure could slightly enhance the crystal modifying effects of organic acids,while the trans-structure damages synergy reaction among carboxyl groups,leading to the ability lose of its crystal modification.Two carboxylic of organic acid complexs with Ca2＋,selectively adsorbed on the（111） face of α-hemihydrate desulfurization gypsum,formating ring-shaped complex compound,which hinder Ca2＋ diffusion and crystal growth,weakens the rative advantage of growth rate on（111） face in c-axis directions,and thereby changes the crystal growth habit and morphology of α-hemihydrate desulfurization gypsum.关键词
α半水石膏/有机酸/晶体形貌/调晶机理Key words
α-hemihydrate gypsum/organic acid/crystal morphology/crystal modification mechanism分类
化学化工引用本文复制引用
彭家惠,陈明凤,张建新,瞿金东,邹辰阳..有机酸结构对α半水脱硫石膏晶体形貌的影响及其调晶机理[J].四川大学学报：工程科学版,2012,44(1):166-172,7.基金项目
国家自然科学基金资助项目 （）
