Feasible Fabrication of a Durable Superhydrophobic Coating on Polyester Fabrics for Oil-Water Separation

Li, Yang; Wang, Jiadao; Fan, Lining; Chen, Darong

doi:10.3866/pku.whxb201601131

Cited by 8 publications

(3 citation statements)

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“…Dow Corning offers MQ-1600 as an isolated solid resin in addition to many silicone formulations containing MQ resins, Momentive Performance Products offers SX1000 as a solid resin, Wacker produces an MQ resin powder 803TF, Shin-Etsu markets MQ resins as components of emulsifiers, BlueStar sells numerous MQ resins as powders or dissolved in organic solvents, SilTech has a library of MQ resins which range from viscous liquids to solids and come pure or in solvent, and Gelest sells vinyl and hydride functional MQ resins. Literature reports describe samples obtained primarily from Dow Corning − but also from Wuhan Green Chemical Technology, Shandong Dayi Chemical, Shanghai Ai Shi Bo Silicon Material, Shenzhen Haili Chemical, Runhe Chemical Industry, and GuangZhou Gigantic Silicon Material . MQ-1600 stands out among these possible choices.…”

Section: Resultsmentioning

confidence: 99%

Rediscovering Silicones: MQ Copolymers

Flagg

McCarthy

2016

Macromolecules

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Organic solvent-soluble trimethylsiloxysilicate polymers (MQ copolymers) were prepared with controlled molecular weight using kinetically controlled, sulfuric acid-catalyzed, hydrolysis/condensation reactions of tetraethoxysilane (TEOS, tetraethyl orthosilicate) and subsequent (end-capping) reactions with hexamethyldisiloxane. We have simplified what is a complex, variable-dependent, industrial preparative procedure that involves competitive sol growth and end-capping reactions to one that separates these reactions into discrete steps and can be carried out with control in a common academic lab. These MQ copolymers are model compounds of commercial MQ resins that are important commodity materials with unique impact in a range of applications. Although they are recognized for their broad utility, they are not widely appreciated as (or even considered) unusual molecules with special structures and properties. The number-average molecular weight of the copolymers reported here can be controlled from ∼2000 to ∼15 000 g/mol and their composition is ∼70 mol % silica (Q), yet they are readily soluble in hydrocarbon solvents and liquid silicones. In addition to reporting a synthetic procedure, we make comments and conjectures concerning their polycyclic molecular structures based on their characterization using IR, 1H, 29Si, and diffusion NMR, dynamic light scattering, gel permeation chromatography, and transmission electron microscopy. Derivatives of these materials that contain vinyldimethylsilyl- and hydridodimethylsilyl-M units were prepared with the objectives of demonstrating that our synthetic approach is chemically versatile and preparing MQ copolymers that are reactive toward hydrosilylation. We expect that these inorganic/organic hybrid materials, which could be termed “molecular nanoparticles”, could serve as a platform upon which chemical derivatization will permit rational implementation in a wider range of applications and technologies than is currently served by commercial MQ resins.

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Section: Resultsmentioning

confidence: 99%

Rediscovering Silicones: MQ Copolymers

Flagg

McCarthy

2016

Macromolecules

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“…The peaks at 1040.16 eV may be the result of the bond between the hydroxyl and residual hydroxyl groups with zinc ions in the reaction process. The primary characteristic peak of Si 2p was located near 101.6 eV, as shown in Figure 3e, belonging to the Si−CH 3 (R 3 −Si−O), Si−O, and Si−N bonds in organosilanes, 46,47 and the splitting peak at 100.2 eV belonged to Si 2p 1/2 , which is mainly caused by Si−C and Si−O bonds. 44,48 Figure 3f shows the XPS spectrum of F 1s.…”

Section: Structural Characterization Of Fzs Compositementioning

confidence: 95%

Nanosized ZnO/SiO₂-Based Amphiphobic Coatings for Stone Heritage Protection

Chai

Wang

Shi

et al. 2022

ACS Appl. Nano Mater.

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Exploring and developing an efficient protective coating for precious stone heritages that have been exposed to sunlight and rain for a long time is crucial. The UV resistance properties of nano-ZnO are apparent. Nano-SiO2 has a stable chemical structure and is one of the main components of stone. This paper introduces the synergistic protective effect of ZnO nanoparticles (ZnO-NPs) and SiO2 nanoparticles (SiO2-NPs) on stone, which is novel in this field. The functional nanocomposite coating (FZS coating) was obtained by spraying the ultrasonic mixture of ZnO-NPs and SiO2-NPs, cross-linked with a silane coupling agent, and modified by fluorocarbon. Wettability and UV aging tests showed that the sandstone deposited by FZS coating had excellent amphiphobicity (water contact angle (WCA) > 160°, oil contact angle (OCA) < 140°). The hydrophobicity was almost changeless after 300 h of UV irradiation, indicating high UV absorption capacity and durability. Interestingly, the amphiphobicity remains unchanged after alternating treatments of temperature and humidity, expressing superior weathering stability. This facile functional coating has potential applications protecting outdoor stone heritages.

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“…Traditional oil-water separation methods, including centrifugation, skimming, flotation, and oil absorbing technology, suffer from the limitation of low separation efficiency, high cost, and secondary pollutants [11][12][13][14][15][16] . To overcome these drawbacks, the filtration technique by using the separation membrane with special wettability has been developed to separate the oil-water mixtures owing to its high efficiency and low power consumption [17][18][19][20][21][22][23][24] . Because of the higher density of water than most oils, the fabrication of membranes with superhydrophilicity/underwater superoleophobicity has attracted intensive research interest, which are prone to interact with water and form a barrier to repel the immiscible oils 19,[25][26][27][28][29][30][31][32][33][34] .…”

Section: Introductionmentioning

confidence: 99%

Zeolite-Coated Anti-Biofouling Mesh Film for Efficient Oil-Water Separation

Wang¹,

吉林大学化学学院²,

Wang³

et al. 2020

Acta Physico-Chimica Sinica

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The development of the global economy has been accompanied by frequent oil spills caused by accidental leaks and industrial manufacturing, which have seriously threatened the aquatic environment and human health. Traditional methods for the treatment of oily wastewater include centrifugation, skimming, flotation, oil-absorbing technology, etc., which are limited by low separation efficiency as well as secondary pollution during the post-processing of oil absorption materials. Recently, separation technologies utilizing the special wettabilities of filtration membranes have been developed to enrich and recycle oils from wastewater. Among these, the fabrication of superhydrophilic/underwater superhydrophobic membranes have attracted intensive research interest, which can selectively allow the passage of water through the membrane while blocking the oils. However, microorganisms are more likely to breed on these hydrophilic surfaces, eventually leading to the blockage of the membranes. In this study, ZSM-5 zeolite crystals (MFI topological structure) were coated onto the stainless-steel meshes by means of seeding and secondary hydrothermal growth. Then, 70% of the total Na + ions in the zeolite channels were substituted by Ag + ions via an ion exchange process. The resultant membranes (Ag@ZCMFs) were superamphiphilic in air, with both water contact angle and oil contact angle of approximately 0°. However, they became superoleophobic when immersed in water, and the underwater oil contact angle reached 151.27° ± 4.34°. In terms of special wettability, Ag@ZCMF achieved efficient separation for various oil-water mixtures with separation efficiencies above 99%. The water flux and intrusion pressure of Ag@ZCMF depended on the diameter of pinholes in the membrane, which could be modulated by altering the time of secondary hydrothermal growth. For instance, the average diameter of pinholes in Ag@ZCMF with optimum secondary growth time of 14 h (Ag@ZCMF-14) reached approximately 21 μm, giving rise to the water flux and intrusion pressure of 54720 L•m −2 •h −1 and 4357 Pa, respectively. The anti-corrosion test and rubbing test confirmed the high chemical and mechanical stability of

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Feasible Fabrication of a Durable Superhydrophobic Coating on Polyester Fabrics for Oil-Water Separation

Cited by 8 publications

References 0 publications

Rediscovering Silicones: MQ Copolymers

Rediscovering Silicones: MQ Copolymers

Nanosized ZnO/SiO₂-Based Amphiphobic Coatings for Stone Heritage Protection

Zeolite-Coated Anti-Biofouling Mesh Film for Efficient Oil-Water Separation

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Feasible Fabrication of a Durable Superhydrophobic Coating on Polyester Fabrics for Oil-Water Separation

Cited by 8 publications

References 0 publications

Rediscovering Silicones: MQ Copolymers

Rediscovering Silicones: MQ Copolymers

Nanosized ZnO/SiO2-Based Amphiphobic Coatings for Stone Heritage Protection

Zeolite-Coated Anti-Biofouling Mesh Film for Efficient Oil-Water Separation

Contact Info

Product

Resources

About

Nanosized ZnO/SiO₂-Based Amphiphobic Coatings for Stone Heritage Protection