3-巯基丙酸自组装单层控制碳酸钙晶型及形貌的研究.pdf

第29卷第1期
无机化学学报
Vol29 No.1
2013年1月
CHINESE JOURNAL, OF INORGANIC CHEMISTRY
31-35
3-巯基丙酸自组装单层控制碳酸钙晶型及形貌的研究
张素王海水*
(华南理エ大学化学与化エ学院,广州510640)
摘要:采用碳酸铵分解产生的NH3和CO2扩散并溶人氯化钙溶液中,得到了碳酸钙晶体。研究结果表明,3-巯其丙酸自组装单
层和溶液温度对碳酸钙晶体的晶型和形貌具有重要影响。25℃条件下,纯溶液中得到了方解石、文石和球霰石三种品型的混合
沉淀物,而在自组装单层存在条件下只得到了表面光滑的菱面体方解石。改变温度,自组装单层调控得到的方解石品体具有不
同的形貌。在60℃得到了多孔方解石,与25℃时典型菱面体方解石有重要区别。XRD分析表明自组装膜上所得碳酸钙晶体为
沿着(104)和(06)晶面取向生长的方解石
关键词:碳酸钙;生物矿化;3…豌基丙酸;自组装单层;方解石
中图分类号:0614-23文献标识码:A文章编号:1001-4861(2013)010031-05
DOI:10.3969/issn.1001-4861.2013.00.036
Control of Crystalline Forms and Morphologies for Caco; Crystals
on 3-mercaptopropionic Acid Self-assembled Monolavers
ZHANG Su WANG Hai-shui
( School of Chemistry and hemical Engineering South China Uniersity of echnolo, Guanghou 510640, China)
Abstract: In the present study, the crystals of Caco were obtained by the slow diffusion of NH and CO2 into
the Cac solutions. Experimental results showed that both 3-mercaptopropionic acid self-assembled monolayers
(SAMS )and solution temperature have significant influence on the crystalline forms and morphologies of calcium
carbonates crystals. The precipitations of calcium carbonate were easily obtained from solutions at 25 C but with
polymorphism including calcite, vaterite and aragonite, while on the self-assembled monolayers there exist calcit
crystals only. The morphologies of calcite crystals can be mediated by temperature. For example, the calcite
precipitated at 25 C has smooth surface while that precipitated at60 C has porous structure even though they
were obtained on the same SAMS. XRD analysis showed that the growth of calcite on SAMS were along(104)and
(00)pl
Key words: calcium carbonate: biomineralization; 3-mercaptopropionic acid; self-assembled monolayer, calcite
0引言
因此实际工业生产中对碳酸钙的晶型和形貌等都
有特定的要求。无水磯酸钙通常有3种晶型:方解
碳酸钙作为一种重要的生物矿化材料,同时也石,文石,球霰石。方解石是3种晶型中最稳定的,
是一种非常重要的无机化工产品已被广泛应用于属于三方晶系:文石的稳定性次于方解石,属于斜
建材,橡胶,涂料,油墨,造纸,塑料,医药等行业方晶系,常存在于生物体的骨骼和壳体;而球霰石
中。不同的应用领域对材料性质有不同的要求,是3种晶型中最不稳定的,属于六方晶系,潮湿环
收稿日期:2012-07-06。收修改稿日期:2012-08-30。
国家自然科学基金(No,20873136资助项目。
通讯联系人。E-mail: wangshe@scut.edu.en