Porous polymer films cast from latex–glucose dispersions

Fogden, Andrew

doi:10.1016/j.colsurfa.2009.08.003

Cited by 2 publications

(4 citation statements)

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“…Examples of pore forming agents tested include small molecule additives (e.g., urea, glycerol, glucose, sucrose, etc.) [ 34 , 35 , 36 , 37 , 38 , 39 ] and water-soluble polymers (WSPs) (e.g., polyvinyl pyrrolidone (PVP), polyethylene glycol (PEG), etc.) [ 40 , 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Porous Film Coating Enabled by Polyvinyl Pyrrolidone (PVP) for Enhanced Air Permeability of Fabrics: The Effect of PVP Molecule Weight and Dosage

Jiang

Shen

et al. 2020

Polymers

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This study developed a versatile and facile method for creating pores and tuning the porous structure in the polymer latex films by selectively etching the added functional polyvinyl pyrrolidone (PVP) molecules. The pore formed in the latex films had a similar morphology to that of PVP aggregation before etching. This observation promotes us to regulate the pore morphology that determines the film’s property, such as air permeability through varying the PVP molecule weight and dosage. To this end, the effects of PVP molecule weight and dosage on the pore formation were systematically studied. The results showed that the average pore size of porous film decreased from >10 μm to sub-micron (about 0.4 μm) as the molecular weight or the dosage of PVP increased. This was ascribed to the strong adsorption affinity of PVP molecule onto the latex particle surface, which further hindered the diffusion and self-assembly of PVP molecule. In addition, this interaction became much stronger when the higher molecule weight of PVP or the higher dosage of PVP was employed, leading to the decreased size of PVP aggregation, as well as the formed pores in the latex films. Furthermore, the addition of PVP had little effect on the color of coated fabric based on the results of CIE L*a*b* measurement. The proposed facile method can be used to improve the air permeability of coated fabrics.

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Section: Introductionmentioning

confidence: 99%

Porous Film Coating Enabled by Polyvinyl Pyrrolidone (PVP) for Enhanced Air Permeability of Fabrics: The Effect of PVP Molecule Weight and Dosage

Jiang

Shen

et al. 2020

Polymers

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“…Porosity in latex coatings involves exceeding the critical pigment concentration, 8 using porous pigments, 9 or otherwise has included incorporation of some sort of poragen. 5,10 In this study we follow the report of Yan and Texter of nanolatexes derived from the ionic liquid surfactant acrylate, ILBr with MMA (methylmethacrylate) comonomer, and that exhibited colloidal stability in high salt. 11 Nanolatexes in this system were prepared at the 0.07/0.07/0.86 ILBr/MMA/water weight ratio composition.…”

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confidence: 96%

“…Porosity in coatings has been found useful in diverse applications including anticorrosion treatments, antislip coatings, perfumed coatings, and antireflective coatings. − Coating is generally done in order to preserve or protect a substrate from environmental effects. Semipermeable coatings, however, can provide barriers to certain components and fields while allowing certain chemical components to easily pass, and porosity in coatings can provide desired optical effects, changes in interfacial adhesion, and a variety of flow and filtration effects.…”

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confidence: 99%

“…Semipermeable coatings, however, can provide barriers to certain components and fields while allowing certain chemical components to easily pass, and porosity in coatings can provide desired optical effects, changes in interfacial adhesion, and a variety of flow and filtration effects. Porosity in latex coatings involves exceeding the critical pigment concentration, using porous pigments, or otherwise has included incorporation of some sort of poragen. , …”

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confidence: 99%

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Stimuli-Responsive Nanolatexes: Porating Films

2012

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Nanolatex Synthesis and CharacterizationOur nanolatexes were prepared via microemulsion polymerization, a special type of dispersion polymerization, from aqueous acrylate/methacrylate microemulsions stabilized by reactive ionic liquid surfactants. To exemplify our process we used methylmethacrylate (MMA) as a comonomer along with the ionic liquid reactive acrylate surfactant 1-(11acryloyloxyundecyl)-3-methylimidazolium bromide (ILBr) to compose the nanolatex precursor solution (microemulsion). ILBr was prepared as described in Refs. 11, 17, and 26 of the main text. This monomer contains an approximately 1% cross-linker, 1,3-bis(11acryloyloxyundecyl)imidazolium bromide as a preparative impurity from alkyl group scrambling in the quaternization step. Ionic liquids are defined as salts, mostly organic, that melt below 100°C; ILBr melts at about 50°C. Microemulsion PolymerizationA partial ternary phase diagram of this system is illustrated in Fig. S1, where one of the compositions for microemulsion polymerization we utilized is indicated by the "✕" in the lower left corner. The microemulsion domain is a thermodynamically stable and somewhat exotic single phase solution. In the illustrated domain, MMA swollen micelles of ILBr are the most prevalent complexes, although irregular bicontinuous microstructure exists at higher surfactant levels.The latexes were prepared by diluting a stock solution of 60% ILBr (w/w) in MMA with the appropriate amounts of water to reach a total volume of 25 ml for each composition. AIBN initiator was present in the MMA stock solution at 0.5% (w/w) with respect to total monomer weight. The clear microemulsion solutions were then heated overnight at 60 °C in a temperature controlled bath.The compositions ranging from 2 -4% ILBr content showed an increasing presence of a light blue Tyndall haze. This increasing blue haze indicated particles were present and that a dispersion had formed. Another indicator of particle formation was the increasing suspension viscosity with increasing ILBr/MMA content.Portions of each sample were dialyzed against daily changes of deionized water for three days in order to remove unreacted monomer. Dialysis was performed by placing approximately 1.5 ml of latex sample inside a 7 cm piece of regenerated cellulose dialysis

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Porous polymer films cast from latex–glucose dispersions

Cited by 2 publications

References 21 publications

Porous Film Coating Enabled by Polyvinyl Pyrrolidone (PVP) for Enhanced Air Permeability of Fabrics: The Effect of PVP Molecule Weight and Dosage

Porous Film Coating Enabled by Polyvinyl Pyrrolidone (PVP) for Enhanced Air Permeability of Fabrics: The Effect of PVP Molecule Weight and Dosage

Stimuli-Responsive Nanolatexes: Porating Films

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