咪唑-1-乙酸改性壳聚糖仿生合成碳酸钙

发布时间：2018-10-22 13:36

【摘要】：以咪唑-1-乙酸改性壳聚糖(IACS)为生物模板仿合成碳酸钙,探讨了体系pH值和陈化时间等因素对碳酸钙的晶型和形貌的影响,利用场发射扫描电镜(FESEM)、X射线粉末衍射分析仪(XRD)、傅里叶红外光谱分析仪(FT-IR)对所合成的碳酸钙进行表征。结果表明,在纯水体系中所合成单一的立方体方解石晶型,而在组氨酸、咪唑-1-乙酸、咪唑-1-乙酸改性壳聚糖单独体系中则还有球状球霰石晶体呈现。在投加咪唑-1-乙酸改性壳聚糖有机基质体系中,当pH值从6.00升至9.00时,仿生合成球状球霰石的含量从75.9%缓慢降至54.6%;而缩小陈化时间,则有利于形成球霰石晶体。因此,利用IACS有机基质可以有效调控碳酸钙的晶型和形貌,也为仿生合成其它生物矿物提供借鉴。
[Abstract]:Calcium carbonate was synthesized by imidazole-1-acetic acid modified chitosan (IACS) as a biological template. The effects of pH value and aging time on the crystal shape and morphology of calcium carbonate were investigated. The synthesized calcium carbonate was characterized by field emission scanning electron microscope (SEM) (FESEM), X ray powder diffraction analyzer (XRD),) Fourier transform infrared spectroscopy (FT-IR). The results showed that a single cubic calcite crystal was synthesized in pure water system, while in the single system of histidine, imidazole-1-acetic acid, imidazole-1-acetic acid modified chitosan, there were spherical vaterite crystals. In the organic matrix system with imidazole-1-acetic acid modified chitosan, when the pH value increased from 6.00 to 9.00, the content of bionic spherical vaterite decreased slowly from 75.9% to 54.6%, while the reduction of aging time was beneficial to the formation of spheroidal crystal. Therefore, the use of IACS organic matrix can effectively regulate the crystal shape and morphology of calcium carbonate, and also provide a reference for bionic synthesis of other biological minerals.
【作者单位】：莆田学院环境与生物工程学院福建省新型污染物生态毒理效应与控制重点实验室;
【基金】：国家自然基金青年基金资助项目(21103095和21206079) 福建省自然科学基金资助项目(2015J01644,2015J01057) 福建省教育厅A类资助项目(JA15450,JAT160431) 国家级大学生创新创业训练计划资助项目(201611498016) 莆田学院育苗基金资助项目(2015060);莆田学院资助项目(2016015,2016065)
【分类号】：TQ132.32

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