Layer-by-layer deposition: A tool for polymer surface modification
Layer-by-layer deposition: A tool for polymer surface modification
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DOI：
10.1021/ma961096d
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发表时间：
1997-01-13
期刊：
影响因子：
5.5
通讯作者：
McCarthy, TJ
中科院分区：
文献类型：
--
作者：
Chen, W;McCarthy, TJ
报道了一种在聚对苯二甲酸乙二酯（PET）薄膜上逐层沉积聚电解质的方法。聚（烯丙基胺盐酸盐）（PAH）和聚（苯乙烯磺酸钠）（PSS）依次吸附到未改性的（中性）PET以及PET样品，已被表面改性含有羧酸盐（PET-CO2-）和铵（PET-NH3+）功能。XPS和接触角数据表明，这些层非常薄（2-6埃）并且分层到显著的程度。多层膜的润湿性由最外层的润湿层和各层的厚度控制（子层在具有较薄层的多层中具有影响）。衬底表面化学控制多层组件中所有层的厚度以及沉积工艺的化学计量（铵离子：磺酸根离子比）。中性衬底（PET）的情况下，研究了离子强度的影响的反渗透溶液;单独的层厚度和沉积化学计量的离子强度的影响。剥离测试表明，多层组件具有显著的机械强度。
Layer-by-layer deposition of polyelectrolytes onto poly(ethylene terephthalate) (PET) film is reported as a method for polymer surface modification. Poly(allylamine hydrochloride) (PAH) and poly(sodium styrenesulfonate) (PSS) were sequentially adsorbed to unmodified (neutral) PET as well as PET samples that had been surface modified to contain carboxylate (PET-CO2-) and ammonium (PET-NH3+) functionality. XPS and contact angle data indicate that the layers are extremely thin (2-6 Angstrom) and stratified to a significant extent. The wettability of the multilayer films is controlled by the outermost polyelectrolyte layer and the thickness of the individual layers (sublayers have an influence in multilayers with thinner layers). The substrate surface chemistry controls the thickness of all of the layers in the multilayer assembly as well as the stoichiometry (ammonium ion:sulfonate ion ratio) of the deposition process. The effect of the ionic strength of the polyelectrolyte solutions was studied for the case of the neutral substrate (PET); both the individual layer thickness and deposition stoichiometry are affected by ionic strength. Peel tests indicate that the multilayer assemblies have significant mechanical strength.