摘要
在聚苯乙烯-丙烯酸两亲共聚物(简称PAS)溶液中制备CaCO3,用XRD、FTIR和SEM等研究随着PAS的亲水AA和亲油St单元组成的变化所引起的聚合物分子链段、溶解性质和胶束空间构象等的改变对CaCO3晶型和形貌的影响。结果显示:随着亲水性AA单元组成的提高,可以由AA链段的晶面匹配成核调控碳酸钙为方解石纳米晶,并因PAS在水溶液中溶解性不同,形成了多种碳酸钙形貌的聚集体;当St和AA的物质的量比为3∶1时,合成出类珍珠岩层碳酸钙结构。根据PAS的结构性质和在水溶液中的溶解行为初步探讨了类珍珠岩层碳酸钙的形成机理,认为是PAS基质模板和羧酸根对钙的键合作用形成这一特殊形貌碳酸钙。
CaCO3 was synthesized in the presence of amphiphilic St/AA copolymer （PAS）. XRD, FTIR and SEM were employed to investigate the crystallization behavior and morphogenesis of CaCO3 while the different composition of PAS affects the array of functional group on the molecular chain/solubility and mieellization behavior. As the content of hydrophilie AA unit increases, PAS induces CaCO3 nucleation through match between AA unit and calcite lattice to form nano-size primary particles; in the meanwhile, under the influence of PAS solubility, CaCO3 particles are accordingly varied in morphology. Mechanisms of insoluble matrices are proposed for the formation of this unique structure.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2006年第7期1191-1195,共5页
Chinese Journal of Inorganic Chemistry
关键词
两亲共聚物
组成
碳酸钙
结晶行为
形貌形成
amphiphilic copolymer
composition
CaCO3
crystallization behavior
morphogenesis
