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基于层层组装技术制备了聚烯丙基胺-葡聚糖微凝胶(记作PAH-D)/透明质酸钠(HA)膜,将包覆有芘分子的十二烷基硫酸钠(SDS)表面活性剂胶束基于静电作用力负载到PAH-D/HA微凝胶膜中,实现了疏水分子芘在微凝胶膜中的高效负载.紫外-可见吸收光谱和荧光光谱证实了SDS胶束包覆的芘分子被稳定地负载在PAH-D微凝胶膜中.透过光谱表明负载有芘分子的(PAH-D/HA)*10微凝胶膜在可见光区仍保持良好光学透过性.芘在膜中的负载量可以通过改变PAH-D/HA微凝胶膜的沉积周期数和SDS胶束中包覆芘分子的浓度而实现调控.具有光致变色性质的螺吡喃分子同样可以借助SDS胶束负载到PAH-D/HA微凝胶膜中,制备具有光致变色性质的层层组装膜.本工作为疏水有机分子在层层组装聚合物膜中的高效负载提供了一种简便、易行的方法.
A polyallylamine-dextran microgel (referred to as PAH-D) / sodium hyaluronate (HA) membrane was prepared based on the layer assembly technique. A mixture of sodium lauryl sulfate coated with pyrene molecules SDS) surfactant micelles were loaded into the PAH-D / HA microgel membrane based on electrostatic force, which achieved high efficiency loading of hydrophobic molecule pyrene in the microgel membrane.UV-Vis absorption spectra and fluorescence spectra confirmed that SDS Micelle-coated pyrene molecules are stably supported in the PAH-D microgel membrane.Phosphorescence-loaded (PAH-D / HA) * 10 microgel membranes show good optical properties in the visible region Permeability. The loading of pyrene in the membrane can be controlled by changing the number of deposition cycles of the PAH-D / HA microgel membrane and the concentration of pyrene molecules coated in the SDS micelles. Molecularly charged molecules can also be loaded onto the PAH-D / HA microgel membrane by means of SDS micelles to prepare a layer-assembled film with photochromic properties. This work is a highly efficient loading of hydrophobic organic molecules in the layer-by-layer assembly of polymer films Provides a simple and easy way.