MilliporeSigma
  • Home
  • Search Results
  • Salt-Responsive Zwitterionic Polymer Brushes with Tunable Friction and Antifouling Properties.

Salt-Responsive Zwitterionic Polymer Brushes with Tunable Friction and Antifouling Properties.

Langmuir : the ACS journal of surfaces and colloids (2015-08-08)
Jintao Yang, Hong Chen, Shengwei Xiao, Mingxue Shen, Feng Chen, Ping Fan, Mingqiang Zhong, Jie Zheng
ABSTRACT

Development of smart, multifunction materials is challenging but important for many fundamental and industrial applications. Here, we synthesized and characterized zwitterionic poly(3-(1-(4-vinylbenzyl)-1H-imidazol-3-ium-3-yl)propane-1-sulfonate) (polyVBIPS) brushes as ion-responsive smart surfaces via the surface-initiated atom transfer radical polymerization. PolyVBIPS brushes were carefully characterized for their surface morphologies, compositions, wettability, and film thicknesses by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), contact angle, and ellipsometer, respectively. Salt-responsive, switching properties of polyVBIPS brushes on surface hydration, friction, and antifouling properties were further examined and compared both in water and in salt solutions with different salt concentrations and counterion types. Collective data showed that polyVBIPS brushes exhibited reversible surface wettability switching between in water and saturated NaCl solution. PolyVBIPS brushes in water induced the larger protein absorption, higher surface friction, and lower surface hydration than those in salt solutions, exhibiting "anti-polyelectrolyte effect" salt responsive behaviors. At appropriate ionic conditions, polyVBIPs brushes were able to switch to superlow fouling surfaces (<0.3 ng/cm(2) protein adsorption) and superlow friction surfaces (u ∼ 10(-3)). The relationship between brush structure and its salt-responsive performance was also discussed. This work provides new zwitterionic surface-responsive materials with controllable antifouling and friction capabilities for multifunctional applications.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Imidazole buffer Solution, BioUltra, 1 M in H2O
Sigma-Aldrich
Trimethoxysilane, 95%
Sigma-Aldrich
1,3-Propanesultone solution, 1 M in THF
Sigma-Aldrich
Copper(I) bromide, AnhydroBeads, -10 mesh, 99.99% trace metals basis
Sigma-Aldrich
Sodium chloride solution, 5 M
Sigma-Aldrich
Sodium chloride solution, 5 M in H2O, BioReagent, for molecular biology, suitable for cell culture
Sigma-Aldrich
Sodium chloride, BioXtra, ≥99.5% (AT)
Sigma-Aldrich
Sodium chloride, BioReagent, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, ≥99%
Sigma-Aldrich
Sodium chloride solution, 0.9% in water, BioXtra, suitable for cell culture
Sigma-Aldrich
Sodium chloride, tablet
Sigma-Aldrich
Sodium chloride, meets analytical specification of Ph. Eur., BP, USP, 99.0-100.5%
Sigma-Aldrich
Sodium chloride, for molecular biology, DNase, RNase, and protease, none detected, ≥99% (titration)
Sigma-Aldrich
Imidazole, ACS reagent, ≥99% (titration)
Sigma-Aldrich
Imidazole, ≥99% (titration), crystalline
Sigma-Aldrich
1,3-Propanesultone, 98%
Sigma-Aldrich
Sodium chloride, AnhydroBeads, −10 mesh, 99.99% trace metals basis
Sigma-Aldrich
Sodium chloride, AnhydroBeads, −10 mesh, 99.999% trace metals basis
Sigma-Aldrich
Copper(I) bromide, 99.999% trace metals basis
Sigma-Aldrich
1,3-Propanesultone, ≥99%
Sigma-Aldrich
Sodium chloride, BioUltra, for molecular biology, ≥99.5% (AT)
Sigma-Aldrich
Sodium chloride solution, BioUltra, for molecular biology, ~5 M in H2O
Sigma-Aldrich
Imidazole, BioUltra, ≥99.5% (GC)
Sigma-Aldrich
Imidazole, BioUltra, for molecular biology, ≥99.5% (GC)
Sigma-Aldrich
Imidazole, puriss. p.a., ≥99.5% (GC)
Sigma-Aldrich
Imidazole, ReagentPlus®, 99%
Sigma-Aldrich
Sodium chloride, 99.999% trace metals basis
Sigma-Aldrich
Sodium chloride-35Cl, 99 atom % 35Cl
Sigma-Aldrich
Sodium chloride, random crystals, optical grade, 99.9% trace metals basis
Sigma-Aldrich
Imidazole, for molecular biology, ≥99% (titration)
Sigma-Aldrich
Sodium chloride solution, 0.85%