海藻酸钠和氨基酸共同作用下Mg^2+、Sr^2+对类海水珍珠质仿生合成的研究  

Study on the effect of Mg^2+,Sr^2+on bionic synthesis of seawater nacre under the action of sodium alginate and amino acid

作　　者：刘艳茹 蔡鹰 杨磊 李程鹏 陈进 LIU Yan-ru;CAI Ying;YANG Lei;LI Cheng-peng;CHEN Jin(Faculty of Chemistry and Environmental Science,Guangdong Ocean University,Zhanjiang Guangdong 524088;Zhanjiang Jiahui Pearl Ltd.,Zhanjiang Guangdong 524001,China)

机构地区：[1]广东海洋大学化学与环境学院,广东湛江524088 [2]湛江市嘉辉珍珠有限公司,广东湛江524001

出　　处：《电子显微学报》2020年第2期164-172,共9页Journal of Chinese Electron Microscopy Society

基　　金：广东省科技发展专项资助项目(No.2016A020222013);湛江市海洋与渔业局资助项目(中央财政2017年暨2016年度渔业成品油价格改革财政补助资金湛江市级统筹部分项目(发展健康环保型水产养殖业方向),合同编号:zj[2018]008)。

摘　　要：采用气体扩散法,在海藻酸钠溶液中添加不同含量氨基酸,及添加Mg^2+和Sr^2+的条件下,研究两种金属离子在碳酸钙生成过程中的影响规律。利用傅里叶红外光谱仪(FT-IR)、X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、光电子能谱(XPS)对实验结果进行表征。结果表明:在海藻酸钠溶液中,添加等浓度、不同氨基酸溶液添加量的情况下,形成的碳酸钙晶型与劣质珍珠质的碳酸钙晶型接近,与优质海水珍珠质层中主要是文石晶体有差异;添加Sr^2+和Mg^2+都会对碳酸钙晶体的形貌产生影响,相比较而言Mg^2+更容易诱导片层文石的生成,而Sr^2+则多生成块状方解石和球状球文石。The effects of Mg^2+,Sr^2+and different contents of amino acids on the formation of calcium carbonate were studied by gas diffusion method.The experimental results were characterized by infrared spectrometer(FT-IR),X-ray diffraction(XRD),scanning electron microscope(SEM)and X-ray photoelectron spectroscopy(XPS).The results show that when sodium alginate solution is added with different concentration of amino acid solution,the crystal form of calcium carbonate is similar to that of low-quality pearls,and different from that of aragonite crystals which is the main composition in the pearl layer of high-quality seawater.The addition of Sr^2+and Mg^2+will affect the morphology of calcium carbonate crystals.In comparison,Mg^2+is more likely to induce the formation of lamellar aragonite,while Sr^2+is more likely to generate massive calcite and spheroidal aragonite.

关 键 词：海藻酸钠 氨基酸 碳酸钙 镁离子 锶离子 

分 类 号：O614.231[理学—无机化学] P34[理学—化学]