Phase and Rheological Properties of a Curcumin-Encapsulated Cubic Liquid Crystal
Phase and Rheological Properties of a Curcumin-Encapsulated Cubic Liquid Crystal
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姜黄素封装的立方液晶的相和流变特性
DOI：
10.1007/s11743-017-1935-y
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发表时间：
2017
影响因子：
1.6
通讯作者：
Xin Zhao
中科院分区：
文献类型：
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作者：
Zhongni Wang;Lei Fu;Xin Liu;Li Zhang;F. Guo;Xin Zhao
为了包封姜黄素的目的，使用Brij 97-NaDC（表面活性剂）/IPM-PEG 400（油）/H2O系统以4：1的恒定Brij 97/NaDC比率和9：1、8：2、7：3、6：4、5：5、4：6和3：7的变化IPM/PEG 400比率构建立方液晶。具有固定的表面活性剂/油/水组成和不同IPM/PEG 400比例的立方液晶样品经历了从Im 3 m到Im 3 mandIa 3 das共存的结构转变，这通过小角X射线散射（SAXS）测量确定。对IPM/PEG 400比例为5：5的立方体样品的SAXS和流变学研究表明，在IPM或PEG 400中包封姜黄素后，立方体液晶变得更稳定，如由较长的特征弛豫时间所指示的。通过在IPM和PEG 400两者中饱和姜黄素，在IPM/PEG 400比率小于5：5时，与相应的不含姜黄素的样品相比，观察到姜黄素包封的液晶的更高的弹性模量、更大的q值和更强的第一散射峰强度。这些结果表明了一种调整所研究的姜黄素包封的立方液晶的稳定性和温度敏感性的方法。
For the purpose of encapsulating curcumin, cubic liquid crystals were constructed using a Brij 97‐NaDC (surfactant)/IPM‐PEG 400 (oil)/H2O system, at a constant Brij 97/NaDC ratio of 4:1 and varied IPM/PEG 400 ratios of 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, and 3:7. The cubic liquid crystal samples, possessing a fixed surfactant/oil/water composition and different IPM/PEG 400 ratios, underwent a structure transition fromIm3mto the coexistence ofIm3mandIa3das determined by small‐angle X‐ray scattering (SAXS) measurements. SAXS and rheological investigations on the 5:5 IPM/PEG 400 ratio cubic samples suggested that the cubic liquid crystals became more stable after encapsulating curcumin in either IPM or PEG 400, as indicated by the longer characteristic relaxation time. By saturating curcumin in both IPM and PEG 400, at an IPM/PEG 400 ratio less than 5:5, higher elastic modulus, largerqvalue, and stronger intensity of the first scattering peak for the curcumin‐encapsulated liquid crystals were observed as compared to the corresponding curcumin‐free samples. Also, clearly different melting points for these systems were found. These results indicate a method of tailoring the stability and the temperature sensitivity of the investigated curcumin‐encapsulated cubic liquid crystals.
DOI：
10.1016/j.colsurfa.2005.06.061
发表时间：
2005-11
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
影响因子：
--
作者：
C. Rodríguez‐Abreu;Durga P. Acharya;K. Aramaki;H. Kunieda
通讯作者：
C. Rodríguez‐Abreu;Durga P. Acharya;K. Aramaki;H. Kunieda