The reinforcement of the physical strength of PVA sponge through the double acetalization

Chang, Yu‐Wei; Chen, Jingwei; Cheng, Wei-You; Jang, Larry K.

doi:10.1016/j.seppur.2017.01.017

Cited by 23 publications

(8 citation statements)

References 10 publications

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“…In the previous studies, scanning electron microscopy (SEM) has been commonly used for imaging nanoparticles adsorbed on a PVA surface. 11,19,20,33 In addition, fluorescence microscopy has been employed for realtime observations of dynamic nanoparticle movements during the PVA brush scrubbing. 33,34 However, these methods do not allow us to directly measure the interaction forces acting between the nanoparticles and the PVA surfaces.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Among various methods used for post-CMP cleaning, the brush scrubbing method has been accepted as the most efficient way to remove contaminants. , In this method, a rotating poly(vinyl alcohol) (PVA) brush (Figure a) is pressed onto a laterally rotating wafer in an aqueous environment. To improve the efficiency of scrubbing, various process conditions and methods have been explored. − In addition, nanoparticle removal mechanisms have been studied from theoretical and experimental aspects. − However, these previous efforts mostly focused on nanoparticle–wafer interactions so that phenomena and mechanisms related to nanoparticle–PVA interactions have not been well understood, especially on the nanometer scale.…”

Section: Introductionmentioning

confidence: 99%

“…One reason for the absence of such studies lies in the difficulties inherent in the direct measurement of interactions between a nanoparticle and a corrugated PVA brush surface in a liquid environment. In the previous studies, scanning electron microscopy (SEM) has been commonly used for imaging nanoparticles adsorbed on a PVA surface. ,,, In addition, fluorescence microscopy has been employed for real-time observations of dynamic nanoparticle movements during the PVA brush scrubbing. , However, these methods do not allow us to directly measure the interaction forces acting between the nanoparticles and the PVA surfaces. Furthermore, PVA is known as a water-soluble polymer and, hence, the interface could present complicated three-dimensional (3D) mixtures of flexible polymer chains, water, and ammonia.…”

Section: Introductionmentioning

confidence: 99%

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Inhibition of Silica Nanoparticle Adhesion to Poly(vinyl alcohol) Surfaces by Ammonia-Mediated Hydration: Implications for Effective Post-Chemical–Mechanical Planarization Cleaning

Ikarashi

Yoshino

Nakajima

et al. 2020

ACS Appl. Nano Mater.

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Adhesion of silica abrasive nanoparticles to a poly(vinyl alcohol) (PVA) brush surface in a post-CMP (chemical mechanical planarization) cleaning leads to serious 1 problems in yield enhancement of semiconductor fabrication. However, the nanoscale adhesion mechanism and its correlation with process conditions have hardly been understood. In this study, we investigated the influence of ammonia in the cleaning solution on silica nanoparticle adhesion to a PVA surface. By atomic force microscopy (AFM), we directly measured adhesion forces between a nanoscale silica probe and a PVA brush surface in various solutions and found that ammonia has a significant inhibitory effect against silica nanoparticle adhesion to a PVA surface. Importantly, we found that this effect cannot be explained by the electrostatic interactions alone, but also involves steric repulsion between silica and hydrated PVA. We also performed molecular-scale three-dimensional scanning force microscopy (3D-SFM) imaging and contact angle measurements, and found that ammonia promotes hydration and swelling of PVA. Furthermore, we performed molecular dynamics simulations and found that ammonia promotes dynamic rearrangements of hydrogen bonding networks (HBNs) at a PVA-water interface, giving extra flexibility to the PVA chains. Such flexibility promotes local swelling of PVA and inhibits silica nanoparticle adhesion to a PVA surface. This provides important guidelines for optimizing nanoscale structures and interactions of brush surfaces and abrasive nanoparticles in post-CMP cleaning.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Inhibition of Silica Nanoparticle Adhesion to Poly(vinyl alcohol) Surfaces by Ammonia-Mediated Hydration: Implications for Effective Post-Chemical–Mechanical Planarization Cleaning

Ikarashi

Yoshino

Nakajima

et al. 2020

ACS Appl. Nano Mater.

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“…We used sodium alginate oxide (OSA) as a macromolecular crosslinking agent, which can provide abundant crosslinking sites through the reaction with the polyhydroxyl polymer. 27,28 The simple preparation process and no residual toxicity are the outstanding advantages of this crosslinking agent. In addition, we introduced photothermal therapy (PTT) to enhance the antibacterial property of the hydrogel for the treatment of infected wounds.…”

Section: Introductionmentioning

confidence: 99%

Injectable In Situ Photocrosslinked Hydrogel Dressing for Infected Wound Healing

Zhang

Dong

Jing

et al. 2023

ACS Appl. Bio Mater.

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A traditional injectable photocrosslinked hydrogel had disadvantages of the residual photoinitiator and toxic crosslinker, slow in situ curing, and a complex preparation process. At the same time, hydrogels cannot act as artificial skin to restore skin sensory function during the wound healing cycle. In this work, an injectable photocrosslinked hydrogel was prepared which can be quickly in situ cured without photoinitiator. Oxidized sodium alginate was used as a natural macromolecular crosslinking agent to form an injectable hydrogel framework with the photosensitive polymer polyvinyl alcohol bearing styrylpyridinium group (PVA-SBQ). In addition, the hydrogel was endowed with photothermal therapy property after the introduction of biomass-like polydopamine particles. When used as a wound dressing, the hydrogel exhibited an excellent antibacterial property, with an antibacterial rate of 99.56% Escherichia coli and 97.96% Staphylococcus aureus. As a result, the hydrogel could significantly accelerate the repair of infected wounds, with a wound healing rate of 96.45% after 14 days. Moreover, the hydrogel exhibited a sensitive and stable sensing property, making it promising to reconstitute the sensory function of damaged skin during treatment. This work provides an idea for the development of injectable photocrosslinked hydrogel dressing.

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“…Polyvinyl alcohol (PVA) sponge is a 3D porous material with low cost, high biocompatibility, and high porosity . It is often used in the fields of tissue engineering, adsorption materials, , and catalysts, while there are only a few studies on superhydrophobic PVA-based sponges for oil/water separation. − For example, Chen et al prepared a superhydrophobic PVA sponge by using a facile and environment-friendly route, and the as-prepared PVA sponge showed long stability for continuous oil/water separation .…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Shi

Kong

et al. 2022

ACS Omega

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Oily wastewater and oil spills pose a threat to the environment and human health, and porous sponge materials are highly desired for oil/water separation. Herein, we design a new superhydrophobic/superoleophilic TiO 2 -decorated polyvinyl alcohol (PVA) sponge material for efficient oil/water separation. The TiO 2 –PVA sponge is obtained by firmly anchoring TiO 2 nanoparticles onto the skeleton surface of pristine PVA sponge via the cross-linking reactions between TiO 2 nanoparticles and H 3 BO 3 and KH550, followed by the chemical modification of 1 H ,1 H ,2 H ,2 H -perfluorodecyltrichlorosilane. The as-prepared TiO 2 –PVA sponge shows a high water contact angle of 157° (a sliding angle of 5.5°) and an oil contact angle of ∼0°, showing excellent superhydrophobicity and superoleophilicity. The TiO 2 –PVA sponge exhibits excellent chemical stability, thermal stability, and mechanical durability in terms of immersing it in the corrosive solutions and solvents, boiling it in water, and the sandpaper abrasion test. Moreover, the as-prepared TiO 2 –PVA sponge possesses excellent absorption capacity of oils or organic solvents ranging from 4.3 to 13.6 times its own weight. More importantly, the as-prepared TiO 2 –PVA sponge can separate carbon tetrachloride from the oil–water mixture with a separation efficiency of 97.8% with the aid of gravity and maintains a separation efficiency of 96.5% even after 15 cyclic oil/water separation processes. Therefore, the rationally designed superhydrophobic/superoleophilic TiO 2 –PVA sponge shows great potential in practical applications of dealing with oily wastewater and oil spills.

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The reinforcement of the physical strength of PVA sponge through the double acetalization

Cited by 23 publications

References 10 publications

Inhibition of Silica Nanoparticle Adhesion to Poly(vinyl alcohol) Surfaces by Ammonia-Mediated Hydration: Implications for Effective Post-Chemical–Mechanical Planarization Cleaning

Inhibition of Silica Nanoparticle Adhesion to Poly(vinyl alcohol) Surfaces by Ammonia-Mediated Hydration: Implications for Effective Post-Chemical–Mechanical Planarization Cleaning

Injectable In Situ Photocrosslinked Hydrogel Dressing for Infected Wound Healing

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

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The reinforcement of the physical strength of PVA sponge through the double acetalization

Cited by 23 publications

References 10 publications

Inhibition of Silica Nanoparticle Adhesion to Poly(vinyl alcohol) Surfaces by Ammonia-Mediated Hydration: Implications for Effective Post-Chemical–Mechanical Planarization Cleaning

Inhibition of Silica Nanoparticle Adhesion to Poly(vinyl alcohol) Surfaces by Ammonia-Mediated Hydration: Implications for Effective Post-Chemical–Mechanical Planarization Cleaning

Injectable In Situ Photocrosslinked Hydrogel Dressing for Infected Wound Healing

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO2-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation

Contact Info

Product

Resources

About

Facile Preparation of Robust Superhydrophobic/Superoleophilic TiO₂-Decorated Polyvinyl Alcohol Sponge for Efficient Oil/Water Separation