Wang Yitong, Xin Xia, Li Wenzhe, Jia Chunyu, Wang Lin, Shen Jinglin, Xu Guiying
National Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan 250100, PR China; Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, PR China.
National Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan 250100, PR China; Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan 250100, PR China.
J Colloid Interface Sci. 2014 Oct 1;431:82-9. doi: 10.1016/j.jcis.2014.06.013. Epub 2014 Jun 17.
Luminescent hydrogels were facilely designed through supramolecular self-assembly of biological surfactant (sodium deoxycholate, NaDC) and lanthanide salt (Eu(NO3)3). The microstructures of the hydrogels were characterized by transmission electron microscopy (TEM), high-resolution TEM (HR-TEM) and field emission scanning electron microscopy (FE-SEM), from which nanofibers and tiny particles were observed. The arrangement of the deoxycholate and metal ions was proposed according to small-angle X-ray scattering (SAXS) and X-ray powder diffraction (XRD) measurements. Rheological measurements revealed that the mechanical strength of the hydrogels increased with increasing concentration of NaDC and Eu(NO3)3, while the maximum emission of the fluorescence of the gels appeared at a stoichiometry between Eu(NO3)3 and NaDC of 1:3. It is expected that the incorporation of luminescent lanthanide ions could impart versatile functionalities for practical applications to the hydrogels.
通过生物表面活性剂（脱氧胆酸钠，NaDC）和镧系盐（Eu(NO3)3）的超分子自组装，轻松设计出了发光水凝胶。用水透射电子显微镜（TEM）、高分辨率TEM（HR-TEM）和场发射扫描电子显微镜（FE-SEM）对水凝胶的微观结构进行了表征，从中观察到了纳米纤维和微小颗粒。根据小角X射线散射（SAXS）和X射线粉末衍射（XRD）测量结果，提出了脱氧胆酸盐和金属离子的排列方式。流变学测量表明，水凝胶的机械强度随着NaDC和Eu(NO3)3浓度的增加而增加，而凝胶荧光的最大发射出现在Eu(NO3)3与NaDC的化学计量比为1:3时。预计掺入发光镧系离子可为水凝胶的实际应用赋予多种功能。
