Role of Surface Molecular Architecture and Energetics of Hydrogen Bonding Sites in Adsorption of Polymers and Surfactants

Bjelopavlic, Mick; Singh, Pankaj Kumar; El‐Shall, H.; Moudgil, Brij M.

doi:10.1006/jcis.2000.6806

Cited by 37 publications

(33 citation statements)

References 9 publications

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“…(8) It is important to note that under the assumption of an independent distribution of the holes (in assumption 5) all the terms of eq 7, with the exception of the first term, are independent of the degree of polymerization of the blocks.…”

Section: (5)mentioning

confidence: 99%

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Adsorption of Block Copolymers from Selective Solvents on Curved Surfaces

Hershkovits

Tannenbaum

2008

Macromolecules

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We have investigated the adsorption of asymmetric poly(styrene-b-methyl methacrylate) block copolymers (PS-PMMA) from a selective solvent onto alumina (Al 2 O 3 ) particles having variable and controllable radii. The solvent used was a bad solvent for the PS block (block A) and a good solvent for the PMMA block (block B), which has a higher affinity of the surface. Such a case represents a new class of adsorption, where both blocks compete for the adsorption sites of the metallic surface. Two theoretical models, the modified drops model and the perforated film model, have been evaluated as appropriate representation of such an adsorption scenario. The experimental results indicated that the adsorption of the PS-PMMA block copolymer generated a patterned surface comprised of a homogeneous melt layer of the PS block perforated with holes having a variable PMMA structure, depending on the distance from the bottom of the hole (alumina surface) and the distance from walls of the hole. The density gradient of the PMMA moiety in the hole reverted to the classical brush morphology at a critical distance from the surface of the hole.

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Section: (5)mentioning

confidence: 99%

“…[6][7][8][9][10][11] Moreover, the polymer adsorption is facilitated by an interaction-multiplier effect, which is unique to chain molecules. [12][13][14] Any interaction that occurs with one segment is multiplied by the large number of identical segments in the macromolecule to generate a large intermolecular effect.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Block Copolymers from Selective Solvents on Curved Surfaces

Hershkovits

Tannenbaum

2008

Macromolecules

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“…For adsorption processes in porous media, the energy of solute/sorbent interactions governs the solute distribution between the interfacial zone and the liquid phase. 4 However, the size of pores is always heterogeneous. When the sample is placed in a dryer after immersion and the solvent vaporizes, surfactants separate from big pores and remain on the surfaces of fabrics or fibers.…”

Section: Sem Photographsmentioning

confidence: 99%

“…In the recent past, the most common method for the exploitation of the surface properties of a target surface involved the use of electrostatic interactions. 4 A model based on the competitive adsorption of surfactant mixtures exhibits both a maximum and a minimum, depending on the relative concentration of each surfactant. 5 Both this model and the mass action model assume that the surfactant monomer interacts with the surface and the micelle competitively.…”

Section: Introductionmentioning

confidence: 99%

Adsorption mechanism of surfactants on nonwoven fabrics

Cai

Zheng

et al. 2003

J of Applied Polymer Sci

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For improved surface properties, nonwoven fabrics of polypropylene and poly(ethylene terephthalate) were treated with several kinds of surfactants, including anionic, cationic, and nonionic types. The adsorption isotherms of the anionic, cationic, and nonionic surfactants on the nonwoven fabrics were different. The adsorption isotherm of the cationic surfactant (dodecyl dimethylbenzyl/ ammonium chloride) exhibited a maximum. The adsorption isotherm of the anionic surfactant (sodium dodecylbenzene sulfonate) was in the shape of the fifth Brunauer adsorption isotherm, and that of the nonionic surfactant (alkylphenol/ ethylene oxide condensate) was similar to the fourth Brunauer adsorption isotherm. The time of the adsorption equilibrium was constant for the same types of adsorbate and adsorbent, and it was not related to the initial concentration. The specific surface resistance of the nonwoven fabrics decreased substantially after the adsorption of ionic surfactants. The nonwoven fabrics with the surfactants were characterized with scanning electron microscopy and X-ray photoelectron spectroscopy.

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“…Hydrogen bonding interactions and their interplay with other adsorption forces play important roles for the adsorption of macromolecules onto various solid surfaces, for example, the adsorption of bacteria and proteins onto various solid surface [1][2][3][4][5][6][7][8][9][10][11]. Chapman et al [2] reported that removing hydrogen bond donor groups from polymer surface by acylation may help to resist the attachment of proteins and bacteria.…”

Section: Introductionmentioning

confidence: 99%