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题名	基于人工大分子体系的碳酸钙矿化机理研究
作者	卢翠香
学位类别	硕士
答辩日期	2009-05-21
授予单位	中国科学院过程工程研究所
授予地点	过程工程研究所
导师	杜竹玮
关键词	生物矿化 碳酸钙 有机基质 水凝胶 自组装膜
其他题名	Study on Biomineralization Mechanism of Calcium Carbonate based on Artificial Macromolecular System
学位专业	生物化工
中文摘要	生物矿物是在特定生物条件下形成的，具有特殊微观结构及宏观性质的材料，其形成的核心机理是有机质调控下无机晶体的成核生长过程。本文即采用聚电解质自组装膜水凝胶两种人工有机大分子体系，模拟碳酸钙的生物矿化，研究有机基质诱导下碳酸钙的成核结晶过程。 以聚二烯丙基二甲基氯化铵(PDAC)、苯乙烯磺酸钠(PSS)为原料，于洁净玻璃基底表面交替组装制备PDAC/PSS自组装膜，研究玻璃基底、静电作用对CaCO3诱导成核结晶的影响。结果表明：诱导过饱和溶液中碳酸钙生长的过程中，自组装膜厚度决定玻璃基底的影响，当达到一定厚度且膜表面规整时，CaCO3 晶体生长过程以自组装膜诱导异相成核主导，生成的晶体形貌、尺寸均一；–SO3－与–(CH2=CH-CH2)N+(CH3)2两种离子诱导生成的碳酸钙具有不同的特征，且以晶体的形貌特征差异最为显著，因此静电作用在矿化过程中对CaCO3晶体的形貌有显著影响。 以聚丙烯酰胺为原料光引发聚合制备了大孔普通水凝胶与微孔溶致液晶(LLC)型水凝胶，并在LLC水凝胶中引入—COOH、—SO3H阴离子基团，研究有机基质的空间限制作用及官能团组成对CaCO3诱导结晶的影响。结晶聚集体特征研究结果表明：规则微孔结构的LLC水凝胶能提高碳酸钙晶体的取向度，菱形亚晶的(104)面平行于聚集体的表面。引入阴离子基团使得CaCO3晶体亚晶的排列更加紧密，其中-COOH对晶体取向无明显影响，而-SO3H则有效改变晶体取向，亚晶与(104)面垂直的面平行于聚集体表面。
英文摘要	Natural biominerals are materials with special microstructure and properties tailored to their respective function forming in specific biological environment. The distinct feature of biomineralized process is matrix controlled nucleation and growth of inorganic crystals. In this paper, two kinds of artificial maromolecular systems, polyelectrolyte self -assembled multilayers and hydrogels were used to simulate the biomineralization of calcium carbonate and study the nucleation and growth of CaCO3 under the inducement of matrices. PDAC/PSS self-assembled multilayers were prepared by alternate adsorption of PDAC and PSS on clean glass substrates. The influences of glass substrate and electrostatic effect on the CaCO3 nucleation and growth were studied. The results indicated that, thickness of the self-assembled multilayer decided the influences of glass substrate on CaCO3 deposition from supersaturated solution. Multilayers with certain thickness and regular surface induced heterogeneous nucleation of CaCO3, and the morphology and size of crystals were homogeneous. CaCO3 crystals induced by -SO3－ and -(CH2=CH-CH2)N+(CH3)2 had different characters, especially in morphology, indicating that, electrostatic effect is one of the key factors in morphology control of CaCO3 crystals. Traditional hydrogels with irregular macroporous and lyotropic liquid crystalline (LLC) hydrogels with regular microporous were preparaed by light-initiated polymerization using acrylamide. LLC hydrogel was further modified with –COOH, -SO3H groups. The effects of space-constraints, functional groups on the CaCO3 nucleation and growth were studied. The obtained crystal congeries indicates that LLC hydrogels with regular microporous could effectively control the crystal orientation, with (104) face of the rhombohedra subcrystals parallel to the surface of the macrocrystals. The modification of anion made CaCO3 rhombohedra subcrystals align more tightly. –COOH groups had minor influences on the crystal orientation, and –SO3H groups could change the crystal orientation effectively, the face perpendicularity to the (104) face parallel to the surface of the congeries.
语种	中文
公开日期	2013-09-16
页码	77
内容类型	学位论文
源URL	[http://ir.ipe.ac.cn/handle/122111/1291]
专题	过程工程研究所_研究所（批量导入）
推荐引用方式 GB/T 7714	卢翠香. 基于人工大分子体系的碳酸钙矿化机理研究[D]. 过程工程研究所. 中国科学院过程工程研究所. 2009.

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