首页
最新动态 交流合作 科研项目 论文著作 精彩瞬间 招生招聘
  • 33.【J. Appl. Polym. Sci.】Ionic strength and anion-specificity effects on the interfacial behavior of double hydrophilic block copolymer PNIPAM-b-POEGA
  • 来源:文纲要教授个人网站 2024-03-10
  • In our prior paper, surface micelles with the core-shell-petal structure of the double hydrophilic block copolymer poly(N-isopropylacrylamide)-block-poly[oligo(ethylene glycol) acrylate] (PNIPAM-b-POEGA) were successfully evaluated. In this work, ionic strength (under acidic conditions) and anion-specificity effects (under neutral conditions) on the aggregation behavior of PNIPAM-b-POEGA at the air/water interface and the morphologies of its Langmuir-Blodgett (LB) films were systematically studied. Under acidic conditions, salting-out effect prevails to electrostatic shielding effect, and the amide group shells with slight protonation degree are covered up by the large POEGA petals. Under neutral conditions, the stretching degrees of POEGA blocks at low/moderate salt concentrations are close. At high salt concentration, the isotherms gradually shift to large molecular area in the order of the NaCl, Na2SO4, NaNO3, and NaSCN cases. The hysteresis degrees of the monolayers increase with the increase of salt concentrations due to the gradually increased interfacial stretching degree and compression-induced underwater solubility of POEGA blocks. All the initial LB films of PNIPAM-b-POEGA exhibit isolated circular micelles with small cores. Upon compression, the LB films exhibit slightly large micelles because of the possible coalescence of some neighboring cores.

    Article address: http://doi.org/10.1002/app.55462

    Read-only address: https://onlinelibrary.wiley.com/share/author/TSTCF7SUVHXVQBFUATV3?target=10.1002/app.55462

  • [来源:中国聚合物网]
  • 了解更多请进入: 文纲要教授个人网站
相关新闻
  • · 37.【Langmuir】Influences of Subphase Salt Conditions on the Interface Behavior of Triblock Copolymer PnBA-PNIPAM-PDMAEA.
  • · 36.【J. Phys. Chem. B】Interfacial Aggregation Behavior of Double Hydrophilic Block Copolymer of PDMAEMA-b-POEGMA
  • · 35.【J. Phys. Chem. B】Ultrafine Network-like Monolayer Structures of Amphiphilic Hyperbranched Copolymers Revealed by the Relative Aggregation Number Method
  • · 34.【Langmuir】Closely Packed Core-Shell Micelle Structures of Double Hydrophilic Mikto-Arm Star Copolymers at the Air/Water Interface

关于我们  |  联系我们  

网站:中国聚合物网

polymer.cn Copyright ©2017