Understanding Thermal Behavior of Poly(ethylene glycol)-<i>block</i>-poly(<i>N</i>-isopropylacrylamide) Hydrogel Using Two-Dimensional Correlation Infrared Spectroscopy

Park, Yeonju; Kim, Minkyoung; Noda, Isao; Jung, Young Mee

doi:10.1177/00037028211006681

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…Compared with the original PDMS, the PDMS characteristic absorption peaks of all the coating samples are reduced in intensity, and new absorption peaks appear at 3347, 1654, and 1451 cm –1 . Among them, the antisymmetric and symmetric stretching vibration peaks of −NH at 3347 cm –1 and the stretching vibration peak of CO at 1654 cm –1 are ascribed to the stretching vibration absorption peaks of amides. , The 1451 cm –1 is the in-plane bending vibration peak of CH in the −CH 2 – group. , This analysis also shows that the surfaces of all of the coating samples are covered with a polymer layer, and the surface of the coating contains hydrophilic groups such as hydroxyl groups. This leads to excellent hydrophilicity.…”

Section: Resultsmentioning

confidence: 70%

“…Among them, the antisymmetric and symmetric stretching vibration peaks of −NH at 3347 cm −1 and the stretching vibration peak of C�O at 1654 cm −1 are ascribed to the stretching vibration absorption peaks of amides. 71,72 The 1451 cm −1 is the in-plane bending vibration peak of CH in the −CH 2 − group. 73,74 This analysis also shows that the surfaces of all of the coating samples are covered with a polymer layer, and the surface of the coating contains hydrophilic groups such as hydroxyl groups.…”

Section: ■ Introductionmentioning

confidence: 99%

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Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Chen,

Xu,

Tang

et al. 2023

Langmuir

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Polydimethylsiloxane (PDMS) has excellent physical–chemical properties and good biocompatibility. Thus, PDMS has been widely applied in biomedical applications. However, the low surface free energy and surface hydrophobicity of PDMS can easily lead to adverse symptoms, such as tissue damage and ulceration, during medical treatment. Therefore, the construction of a hydrophilic low-friction surface on the PDMS surface could be helpful for alleviating patient discomfort and would be of great significance for broadening the application of PDMS in the field of interventional medical catheters. Existing surface modification methods such as hydrogel coatings and chemical grafting suffer from several deficiencies including uncontrollable thickness, surface fragility, and low surface strength. In this study, a hydrophilic surface with ultra-low friction properties was prepared on the surface of PDMS by an ultraviolet light (UV) curing method. The monomer acrylamide (AM) was induced by a photoinitiator to form a coating on the surface of the silicone rubber by in situ polymerization. The surface roughness of the as-prepared coatings was regulated by adding different concentrations of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) to the monomer solution, and the coating properties were systematically characterized. The results indicated that the roughness and thickness of the as-prepared coatings decreased with increasing AMPS concentration and the as-prepared coatings had good hydrophilicity and low-friction properties. The Coefficient of Friction (CoF) was as low as 0.0075 in the deionized water solution, which was 99.7% lower than that of the unmodified PDMS surface. Moreover, the coating with a lower surface roughness exhibited better low-friction properties. The results reported herein provide new insight into the preparation of hydrophilic, low-friction coatings on polymer surfaces.

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Section: Resultsmentioning

confidence: 70%

Section: ■ Introductionmentioning

confidence: 99%

Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Chen,

Xu,

Tang

et al. 2023

Langmuir

View full text Add to dashboard Cite

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Diverse Applications of Two-Dimensional Correlation Spectroscopy (2D-COS)

Park,

Noda,

Jung

2024

Appl Spectrosc

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This second of the two-part series of a comprehensive survey review provides the diverse applications of two-dimensional correlation spectroscopy (2D-COS) covering different probes, perturbations, and systems in the last two years. Infrared spectroscopy has maintained its top popularity in 2D-COS over the past two years. Fluorescence spectroscopy is the second most frequently used analytical method, which has been heavily applied to the analysis of heavy metal binding, environmental, and solution systems. Various other analytical methods including laser-induced breakdown spectroscopy, dynamic mechanical analysis, differential scanning calorimetry, capillary electrophoresis, seismologic, and so on, have also been reported. In the last two years, concentration, composition, and pH are the main effects of perturbation used in the 2D-COS fields, as well as temperature. Environmental science is especially heavily studied using 2D-COS. This comprehensive survey review shows that 2D-COS undergoes continuous evolution and growth, marked by novel developments and successful applications across diverse scientific fields.

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Understanding Thermal Behavior of Poly(ethylene glycol)-block-poly(N-isopropylacrylamide) Hydrogel Using Two-Dimensional Correlation Infrared Spectroscopy

Cited by 2 publications

References 29 publications

Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Preparation and Properties of PDMS Surface Coating for Ultra-Low Friction Characteristics

Diverse Applications of Two-Dimensional Correlation Spectroscopy (2D-COS)

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