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  • ISSN 1006-3080
  • CN 31-1691/TQ

不同烷基链长度脂肪酸钾凝胶的微晶结构及热稳定性

巩涛 王小永

巩涛, 王小永. 不同烷基链长度脂肪酸钾凝胶的微晶结构及热稳定性[J]. 华东理工大学学报(自然科学版). doi: 10.14135/j.cnki.1006-3080.20220403001
引用本文: 巩涛, 王小永. 不同烷基链长度脂肪酸钾凝胶的微晶结构及热稳定性[J]. 华东理工大学学报(自然科学版). doi: 10.14135/j.cnki.1006-3080.20220403001
GONG Tao, WANG Xiaoyong. Crystalline Structure and Thermal Stability of Fatty Acid Potassium Gels with Different Alkyl Chain Lengths[J]. Journal of East China University of Science and Technology. doi: 10.14135/j.cnki.1006-3080.20220403001
Citation: GONG Tao, WANG Xiaoyong. Crystalline Structure and Thermal Stability of Fatty Acid Potassium Gels with Different Alkyl Chain Lengths[J]. Journal of East China University of Science and Technology. doi: 10.14135/j.cnki.1006-3080.20220403001

不同烷基链长度脂肪酸钾凝胶的微晶结构及热稳定性

doi: 10.14135/j.cnki.1006-3080.20220403001
基金项目: 国家自然科学基金资助项目(21573071)
详细信息
    作者简介:

    巩涛(1997—),男,安徽人,硕士生,主要从事表面活性剂相关研究

    通讯作者:

    王小永,E-mail:xiaoyong@ecust.edu.cn

  • 中图分类号: O647.2

Crystalline Structure and Thermal Stability of Fatty Acid Potassium Gels with Different Alkyl Chain Lengths

  • 摘要: 研究了月桂酸钾(LK)和棕榈酸钾(PK)凝胶的微晶结构、流变性质及热稳定性。室温下,偏光显微镜下的30%LK凝胶呈现条带状微晶交叉堆积状态,而30%PK凝胶呈现线状微晶纤维束。X射线衍射结果表明不同浓度的LK保持水合层状微晶,而增大浓度会使PK水合层状微晶转变为无水层状微晶。温度升高使LK水合层状微晶转变为六角相液晶和球形胶束,PK无水层状微晶转变为层状液晶。PK凝胶的储能模量和损耗模量分别是LK凝胶的50倍和15倍,且在20~60℃未出现突降,这说明由长烷基链脂肪酸钾形成的PK凝胶具有更强的微晶网络结构和更高的热稳定性。

     

  • 图  1  月桂酸钾和棕榈酸钾样品的偏光显微镜照片

    Figure  1.  Polarized optical micrographs of potassium laurate and potassium palmitate samples

    图  2  月桂酸钾和棕榈酸钾样品的XRD曲线(黑色曲线为无水脂肪酸钾固体)

    Figure  2.  XRD curves of potassium laurate and potassium palmitate samples (The black curve is for solid fatty acid potassium without water)

    图  3  月桂酸钾和棕榈酸钾凝胶的储能模量G′和损耗模量G"随角频率ω的变化曲线

    Figure  3.  Storage modulus G′ and loss modulus G" curves versus different angular frequency ω for potassium laurate and potassium palmitate gels

    图  4  月桂酸钾和棕榈酸钾凝胶的DSC加热曲线及偏光显微镜照片

    Figure  4.  DSC curves and polarized optical micrographs of potassium laurate and potassium palmitate gels during heating

    图  5  45 ℃时月桂酸钾和棕榈酸钾凝胶的XRD曲线

    Figure  5.  XRD curves of potassium laurate and potassium palmitate gels at 45 ℃

    图  6  脂肪酸钾凝胶的储能模量G′和损耗模量G"随温度t的变化曲线

    Figure  6.  Storage modulus G′ and loss modulus G" curves of potassium laurate and potassium palmitate gels during heating

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出版历程
  • 收稿日期:  2022-04-03
  • 网络出版日期:  2022-06-07

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