在离子液体[C_(16)imC_8]Br和[C_(16)imC_8]Br与β环糊精形成的蠕虫状胶束中的仿生合成CaC_2O_4
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- 英文论文题名：The biomimetic synthesis of CaC_2O_4 in the C_(16)-C_8/H_2O wormlike micelles and the C_(16)-C_8/β-CD/H_2O wormlike micelles
- 论文作者：胡益民 ; 郭荣
- 英文论文作者：Yimin Hu ; Rong Guo ; School of Chemistry and Chemical Engineering ; Yangzhou University
- 年：2016
- 作者机构：扬州大学化学化工学院;
- 论文关键词：[C_(16)imC_8]Br ; 蠕虫状胶束 ; β-CD ; 离子液体 ; CaC_2O_4
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十一分会：胶体与界面化学
- 语种：中文
- 分类号：O614.231
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十一分会 ; 胶体与界面化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：384k
- 原文格式：D
- 会议级别：全国
摘要
以盐诱导C_(16)-C_8以及以C_(16)-C_8/β-CD所形成的蠕虫状胶束形成为模板,使用CaCl_2和Na_2C_2O_4,在室温下均能成功合成了不同结构的CaC_2O_4。流变学研究表明,随着CaCl_2、Na_2C_2O_4和β-CD浓度的升高,C_(16)-C_8体系的黏弹性先增加然后减小。TEM研究表明C_(16)-C_8体系CaC_2O_4为蔷薇花形结构,而β-CD的加入可以使合成的CaC_2O_4空心结构变的蓬松。射线衍射技术(XRD)研究表明本体系中所合成的草酸钙纳米粒子的晶型结构为CaC_2O_4·H_2O。结合蠕虫状胶束的性质以及CaC_2O_4的形貌,在C_(16)-C_8体系中CaC_2O_4的可能生长机理是离子先吸附在胶束的表面成核,然后在富Ca~(2+)晶面上优先生长。而C_(16)-C_8/β-CD体系中,C_(16)-C_8的疏水链插入到β-CD的疏水内腔中,外部的亲水性部分能为草酸钙晶体提供成核位点,形成一定的空心结构。因此蠕虫状胶束体系为研究尿结石的仿生合成提供一条新的途径和思路。
In this work,the influence of different additives on the viscoelastic property of an ionic liquid-type surfactant C_(16)-C_8 aqueous solution is studied.A series of additives such as CaCl_2,Na_2C_2O_4 and β-CD are proven to promote the viscoelasticity of the wormlike micelle formed by the C_(16)-C_8 aqueous solution.Nanostructures of CaC_2O_4have been prepared in the surfactant wormlike micelle by CaCl_2 and Na_2C_2O_4 for the first time.TEM study showed that CaC_2O_4 synthesized in the C_(16)-C_8/H_2O system has the rose flower shaped structure.However,CaC_2O_4 synthesized in the C_(16)-C_8/β-CD/H_2O wormlike micelles has the hollow fluffy rose flower structure.The XRD patterns of the nanomaterials exhibits pure CaC_2O_4·H_2O.The Ca~(2+) is located on the surface of the micelle by electrostatic attraction with Br~-.When Na_2C_2O_4 is added into the C_(16)-C_8 aqueous solution,the CaC_2O_4nucleaties on the surface of the micelle and then minerlizates.When β-CD is added into the C_(16)-C_8 aqueous solution,the hydrophobic chains of C_(16)-C_8 insert into the hydrophobic cavity of β-CD beta.The hydrophilic external parts of β-CD provide nucleation sites to CaC_2O_4 crystals,which induces the formation of hollow structure.The synthesis of nanomaterials in wormlike micelles thus provides a new approach for the study of biomimetic synthesis of urinary calculi.
In this work,the influence of different additives on the viscoelastic property of an ionic liquid-type surfactant C_(16)-C_8 aqueous solution is studied.A series of additives such as CaCl_2,Na_2C_2O_4 and β-CD are proven to promote the viscoelasticity of the wormlike micelle formed by the C_(16)-C_8 aqueous solution.Nanostructures of CaC_2O_4have been prepared in the surfactant wormlike micelle by CaCl_2 and Na_2C_2O_4 for the first time.TEM study showed that CaC_2O_4 synthesized in the C_(16)-C_8/H_2O system has the rose flower shaped structure.However,CaC_2O_4 synthesized in the C_(16)-C_8/β-CD/H_2O wormlike micelles has the hollow fluffy rose flower structure.The XRD patterns of the nanomaterials exhibits pure CaC_2O_4·H_2O.The Ca~(2+) is located on the surface of the micelle by electrostatic attraction with Br~-.When Na_2C_2O_4 is added into the C_(16)-C_8 aqueous solution,the CaC_2O_4nucleaties on the surface of the micelle and then minerlizates.When β-CD is added into the C_(16)-C_8 aqueous solution,the hydrophobic chains of C_(16)-C_8 insert into the hydrophobic cavity of β-CD beta.The hydrophilic external parts of β-CD provide nucleation sites to CaC_2O_4 crystals,which induces the formation of hollow structure.The synthesis of nanomaterials in wormlike micelles thus provides a new approach for the study of biomimetic synthesis of urinary calculi.
引文
[1]参考文献:Zhang,J.J.;Shen,X.H.J.Phys.Chem.B 2013,117,1451.