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共价交联的功能多层膜在药物负载、可控释放方面的研究
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摘要
本文利用共价层层组装的方法先后制备了PAH/GO以及PAH/PAA-CD多层膜,然后将双官能团光交联剂(DAS)后渗透进入多层膜中,紫外辐照形成共价交联的多层膜,并研究了薄膜对于分子的可控渗透或释放特性。PAH/GO多层膜对亚甲基蓝、罗丹明B、荧光素钠等小分子具有控速渗透的性能,而多肽、蛋白质等大分子则不能透过薄膜~([1])。利用层层组装方法对薄膜厚度的精确调控,实现了对小分子渗透速率的调控。PAH/PAA-CD多层膜中,由于环糊精(Cyclodextrin,CD)分子与其客体分子间具有分子识别作用,对修饰有金刚烷的多肽(Ad-SGK(Rh B)-SGRGD)的负载量远高于没有修饰金刚烷多肽(RhB-SGSGRGD),且对客体修饰的多肽的负载量受平衡溶液的浓度影响敏感。主客体作用使得多肽在薄膜中的扩散减慢,因此释放曲线变缓,从而证明修饰环糊精的多层膜对客体分子的负载和释放具有较强的控制能力。
In this paper we use conventional layer-by-layer(Lb L) assembly method to obtain GO-PAH multilayers and PAH/PAA-CD multilayers,then a photoactive bi-functional small molecule DAS was infiltrated into the multilayer followed by UV-induced cross-linking to stabilize the as-prepared multilayer. We have studied the properties of multilayer films among molecular load and controlled release. Through layer-by-layer(Lb L) assembly technique, we can regulate the thickness of the multilayer film exactly and study the long-term steady delivery(release or permeation) of these small molecules with adjustable and controllable speeds. Supramolecular interactions, such as Cyclodextrin molecules and its guest molecules by host-guest interactions can form a stable self-assembled system, We using β-cyclodextrin(β-CD)-grafted poly(acrylic acid)(PAA, Mw~100,000)(PAA-CD) and PAH fabricated PAH/PAA-CD multi-layer film. Owing to Supramolecular interactions between β-cyclodextrin and adamantine, the amount of PAH/PAA-CD multi-layer film load adamantane grafted peptide(Ad-SK(Rh B)-SGRGD) was much higher than without adamantane grafted peptide(RhB-SGSGRGD).
引文
[1]Huang,T.;An,Q.;Luan,X.;Zhang,Q.;Zhang,Y.Nanoscale,2016,8:2003-2010.

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