Grafted polymeric nanostructures patterned bottom–up by colloidal lithography and initiated chemical vapor deposition (iCVD)

Trujillo, Nathan J.; Baxamusa, Salmaan H.; Gleason, Karen K.

doi:10.1016/j.tsf.2009.01.034

Cited by 19 publications

(12 citation statements)

References 24 publications

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“…It is generally known that the CC stretching vibration at 1640 cm −1 in monomers HEMA and METAC is quite remarkable according to previous studies, whereas we found that the absorption peak at 1640 cm −1 was very weak in gels p, pc, pcpL10% and pcpS10% as shown in the figure. In detail, before polymerization, there was much CC in the reaction medium which led to the strong absorption peak at 1640 cm −1 . And after reaction, the gels was obtained and there was little CC in the gels which resulted in the weak absorption peak.…”

Section: Resultsmentioning

confidence: 97%

Salt and pH sensitive semi‐interpenetrating polyelectrolyte hydrogels poly(HEMA‐co‐METAC)/PEG and its BSA adsorption behavior

Zhang

Fang

et al. 2014

J of Applied Polymer Sci

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A novel semi-interpenetrating poly(2-hydroxyethyl methacrylate) (pHEMA) based polyelectrolyte hydrogel [p(HEMA-co-METAC)/PEG] was prepared by copolymerizing HEMA with the cationic monomer 2-methacryloyloxyethyltrimethyl ammonium chloride (METAC) in the presence of polyethylene glycol (PEG) with different content and molecular weight (MW 4000 and 400). The chemical structure of the gels was confirmed by FT-IR spectroscopy, morphology study was performed by scanning electron microscope (SEM), thermal stability was revealed by thermogravimetric analysis (TGA), and the mechanical properties were determined by electronic universal testing machine. Swelling studies showed introduction of cationic monomer METAC led to high water content, and the obvious salt and pH sensitive properties were observed which proved the smart behavior of the semiinterpenetrating polymer networks (IPNs) gels. In addition, the effect of temperature and some important biological solution on swelling behavior were reported. Cytotoxicity test demonstrated that synthesized gels owned satisfactory cytocompatibility and were convenient for the application as biomaterials. Finally, the weak bovine serum albumin (BSA) adsorption on semi-IPNs by introducing METAC and controlling the content of PEG in gels demonstrated that they were of good protein resistance effect in biomedical applications.

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Section: Resultsmentioning

confidence: 97%

Salt and pH sensitive semi‐interpenetrating polyelectrolyte hydrogels poly(HEMA‐co‐METAC)/PEG and its BSA adsorption behavior

Zhang

Fang

et al. 2014

J of Applied Polymer Sci

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“…Unlike plasma-deposited polymers, which are inherently crosslinked due to the extensive fragmentation of monomers in the harsh plasma discharge during the depositions, the iCVD homopolymers are usually linear and hence they are soluble in common solvents. 25 Therefore, crosslinking through the introduction of one or more comonomers are usually preferred to obtain robust crosslinked films. By introducing two or even three monomers into iCVD chamber results in the deposition of copolymers and terpolymers.…”

Section: Introductionmentioning

confidence: 99%

“…Although initial iCVD works mostly concentrated on the synthesis of functional homo‐polymers, the need for strong, non‐soluble, and durable coatings, as well as the demand for surfaces having multi‐functional and tunable properties increased the interest in copolymerization and crosslinking by iCVD. Unlike plasma‐deposited polymers, which are inherently crosslinked due to the extensive fragmentation of monomers in the harsh plasma discharge during the depositions, the iCVD homopolymers are usually linear and hence they are soluble in common solvents 25 . Therefore, crosslinking through the introduction of one or more comonomers are usually preferred to obtain robust crosslinked films.…”

Section: Introductionmentioning

confidence: 99%

Vapor deposition of stable copolymer thin films in a batchiCVDreactor

Yılmaz

Şakalak

Gürsoy

et al. 2020

J of Applied Polymer Sci

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This study demonstrates the deposition of poly(ethylhexyl acrylate-co-ethylene glycol dimethacrylate) (P(EHA-co-EGDMA)) copolymer thin films in a batch type initiated chemical vapor deposition (iCVD) reactor. Crosslinked copolymers are desired for many applications because of their high stable properties. iCVD polymers derived by monomers bearing only one vinyl bond are usually linearly structured polymers and hence they are not durable, which is unfavorable for many real-world applications. Robust crosslinked iCVD films can be produced with the help of crosslinkers. In a typical iCVD process, copolymer thin film is produced by constantly feeding monomer vapor and crosslinker into the reactor. The monomer/crosslinker ratio should be precisely controlled for fabrication of reproducible thin films. In order to eliminate problems caused by adjusting the flowrates of precursors, a closed-batch type iCVD reactor was used for the first time in this study to produce copolymer thin films. The variation of precursors' partial pressures allowed control over the copolymer thin film structures. As compared with homopolymer, copolymers showed the better chemical and thermal stable properties. Almost 40% of the copolymer thin film remained on the substrate surface at an annealing temperature of 300 C, whereas the homopolymer film was completely removed at an annealing temperature of 280 C.

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“…3 One of the main advantages of the iCVD process over liquid phase processing is the ability to coat three-dimensional objects, such as pillars, membranes, and textiles, because there are no solvent tension effects such as wetting or de-wetting. 4,5 Although several techniques have recently been employed to pattern iCVD polymer films such as colloidal lithography, 6 electron-beam lithography, 7,8 and capillary force lithography, 9 these patterning techniques have been limited to flat surfaces and the ability to pattern three-dimensional porous materials has not yet been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional patterning of porous materials using vapor phase polymerization

2011

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The ability to pattern porous materials with functional polymeric coatings is important for the fabrication of next-generation microfluidic platforms, membranes, tissue scaffolds, and optical devices. Here, we demonstrate for the first time that solventless initiated chemical vapor deposition (iCVD) can be used for three-dimensional patterning of porous substrates. The individual fibers of hydrophilic chromatography paper were uniformly coated with a thin layer of hydrophobic photoresponsive poly(o-nitrobenzyl methacrylate) (PoNBMA). X-Ray photoelectron spectroscopy and contact angle measurements confirmed that the PoNBMA coating penetrated the entire depth of the paper and scanning electron microscope images confirmed that the porosity and hierarchical structure of the paper were retained during the coating process. The PoNBMA coating was then patterned through the entire depth of the paper by exposure to ultraviolet light followed by rinsing in biologically compatible buffer. We demonstrated the utility of our patterning process by fabricating three-dimensional hydrophilic and hydrophobic regions into the chromatography paper for use as paper-based microfluidic devices. Our patterning process represents an environmentally friendly method to pattern three-dimensional materials since no organic solvents are used during the polymerization process or patterning step.

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Grafted polymeric nanostructures patterned bottom–up by colloidal lithography and initiated chemical vapor deposition (iCVD)

Cited by 19 publications

References 24 publications

Salt and pH sensitive semi‐interpenetrating polyelectrolyte hydrogels poly(HEMA‐co‐METAC)/PEG and its BSA adsorption behavior

Salt and pH sensitive semi‐interpenetrating polyelectrolyte hydrogels poly(HEMA‐co‐METAC)/PEG and its BSA adsorption behavior

Vapor deposition of stable copolymer thin films in a batchiCVDreactor

Three-dimensional patterning of porous materials using vapor phase polymerization

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