Zhunuspayev Daulet E, Mun Grigoriy A, Hole Patrick, Khutoryanskiy Vitaliy V
School of Pharmacy, University of Reading, Whiteknights, P.O. Box 224, Reading RG6 6AD, United Kingdom.
Langmuir. 2008 Dec 2;24(23):13742-7. doi: 10.1021/la802852h.
The formation of hydrogen-bonded interpolymer complexes between poly(acrylic acid) and poly(N-vinyl pyrrolidone) as well as amphiphilic copolymers of N-vinyl pyrrolidone with vinyl propyl ether has been studied in aqueous and organic solutions. It was demonstrated that introduction of vinyl propyl ether units into the macromolecules of the nonionic polymer enhances their ability to form complexes in aqueous solutions due to more significant contribution of hydrophobic effects. The complexation was found to be a multistage process that involves the formation of primary polycomplex particles, which further aggregate to form spherical nanoparticles. Depending on the environmental factors (pH, solvent nature), these nanoparticles may either form stable colloidal solutions or undergo further aggregation, resulting in precipitation of interpolymer complexes. In organic solvents, the intensity of complex formation increases in the following order: methanol < ethanol < isopropanol < dioxane. The multilayered coatings were developed using layer-by-layer deposition of interpolymer complexes on glass surfaces. It was demonstrated that the solvent nature affects the efficiency of coating deposition.
已对聚丙烯酸与聚N-乙烯基吡咯烷酮以及N-乙烯基吡咯烷酮与乙烯基丙基醚的两亲性共聚物之间氢键合互聚物络合物的形成在水溶液和有机溶液中进行了研究。结果表明，由于疏水作用的贡献更大，将乙烯基丙基醚单元引入非离子聚合物的大分子中可增强其在水溶液中形成络合物的能力。发现络合是一个多阶段过程，涉及初级聚络合物颗粒的形成，这些颗粒进一步聚集形成球形纳米颗粒。根据环境因素（pH值、溶剂性质），这些纳米颗粒可能形成稳定的胶体溶液，也可能进一步聚集，导致互聚物络合物沉淀。在有机溶剂中，络合物形成的强度按以下顺序增加：甲醇＜乙醇＜异丙醇＜二氧六环。通过在玻璃表面逐层沉积互聚物络合物开发了多层涂层。结果表明，溶剂性质会影响涂层沉积的效率。
