Konya Food and Agriculture University, Faculty of Engineering and Architecture, Department of Bioengineering, Dede Korkut Mah. Beysehir Cad. No: 9, 42080 Konya, Turkey.
Carbohydr Polym. 2016 Aug 1;146:174-80. doi: 10.1016/j.carbpol.2016.03.037. Epub 2016 Mar 19.
Polyelectrolyte multilayer (PEM) films composed of two natural polysaccharides (hyaluronic acid and chitosan) were deposited through layer-by-layer (LbL) assembly on top of biocompatible mesoporous silica nanoparticles (MSNPs). Polyelectrolyte multilayer coated mesoporous silica nanoparticles (PEM-MSNPs) were characterized by using attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen adsorption-desorption isotherms, UV-vis and fluorescence spectrophotometer. A commercially available and industrially used optical brightener, 4,4'-distyrylbiphenyl sulfonate sodium salt (CBSX) was loaded into nanocontainers (CBSX@PEM-MSNPs) to evaluate their use for the pH-sensitive release. The controlled release of CBSX from nanocontainers in response to pH is monitored by using UV-vis and fluorescence spectrophotometer in water and the almost 100% of encapsulated CBSX is released within 2h at pH 7. The increase in both whiteness and total color change at pH 7 on a cellulose fabric demonstrates the great potential of nanocontainers as pH-sensitive whitening agents for optical bleaching of cellulose fabrics.
通过层层自组装（LbL）技术，将两种天然多糖（透明质酸和壳聚糖）组成的聚电解质多层（PEM）薄膜沉积在生物相容性介孔硅纳米粒子（MSNPs）上。采用衰减全反射傅里叶变换红外光谱（ATR-FTIR）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、氮气吸附-脱附等温线、紫外-可见分光光度计和荧光分光光度计对聚电解质多层包裹的介孔硅纳米粒子（PEM-MSNPs）进行了表征。将一种市售的、工业上使用的光学增白剂 4,4'-二苯乙烯基联苯磺酸钠盐（CBSX）负载到纳米容器（CBSX@PEM-MSNPs）中，以评估其用于 pH 敏感释放的用途。通过在水和荧光分光光度计中监测纳米容器中 CBSX 在 pH 响应下的受控释放，在 pH 7 时，几乎 100%的包封 CBSX 在 2 小时内释放。在纤维素织物上，pH 7 时的白度和总色差值的增加表明纳米容器作为 pH 敏感增白剂在纤维素织物的光学增白方面具有巨大的潜力。
