Discovery of VOC-compliant TEOS sol and its application to SiO2/novolac hybrid coatings

Zheng, Shun Xing; Shen, Chao; Alunbate, M.; Deng, Jie; Han, ZuoXiang; Han-xiang, Tang

doi:10.1016/j.porgcoat.2012.10.025

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…Ice crystals and olefins sublimated to form pores after freeze‐drying. However, in addition to water and camphene, the TEOS, as a high volatile liquid, affected the pore structure of the PS fibers. Figure shows the morphologies of PS fibrous membranes obtained by electrospinning and freeze‐drying using solutions with different TEOS contents.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of hollow and porous polystyrene fibrous membranes by electrospinning combined with freeze‐drying for oil removal from water

Tang

Liu

Zhao

2018

J of Applied Polymer Sci

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A novel method was proposed to fabricate hollow and surface porous polystyrene (PS) fibrous membranes for the removal of oil from water. Spinning solutions were prepared by using camphene and tetraethoxysilane (TEOS) as pore‐forming agents, and hollow PS fibers with 100–400 nm pores on the surface were fabricated by electrospinning and freeze‐drying. The distribution and volatilization of camphene and TEOS, as well as the drying behavior of solvents in high relative humidity, were important factors in forming the porous structure of PS fibers. The specific surface area of obtained PS fibrous membranes was twice that of conventional electrospun PS fibrous membranes and displayed superhydrophobic properties. Moreover, the large adsorption storage space was formed due to the hollow structure and porous surface of PS fibers. The maximum oil adsorption capacity of the porous PS fibrous membrane was 105.4 g g−1, and was larger than that of the conventional PS fibrous membrane after repeated five times, thus making it a promising tool for oil spill cleanups. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47262.

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Section: Resultsmentioning

confidence: 99%

Fabrication of hollow and porous polystyrene fibrous membranes by electrospinning combined with freeze‐drying for oil removal from water

Tang

Liu

Zhao

2018

J of Applied Polymer Sci

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“…However, its wettability turned to be hydrophilicity (WCA is 37.78 ± 1°) via NaOH treatment. Further SiC nanowires coated by SiO 2 nanoparticles using chemical liquid deposition method 37 switched to superhydrophilicity with WCA close to 0°. Besides coating, PVP as surfactant decorated on the surface of SiC nanowires also displayed superhydrophilicity.…”

Section: Introductionmentioning

confidence: 99%

SiC Nanowires with Tunable Hydrophobicity/Hydrophilicity and Their Application as Nanofluids

et al. 2016

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In this paper, several methods including HF, NaOH, TEOS, and PVP treatment were adopted to modify the wettability of silicon carbide (SiC) nanowires switching from hydrophobic to hydrophilic. The phase and microstructure investigated by XRD, FT-IR, XPS, TGA, SEM, and TEM demonstrated SiC nanowires switching from hydrophobic to hydrophilic due to the surface-tethered hydrophilic layer as well as increasing interspace between nanowires. Besides this, SiC nanowires with hydrophilicity may effectively improve the thermal conductivity of a fluid. The thermal conductivity of aqueous SiC nanowires after TEOS treatment with just 0.3 vol % was remarkably improved up to ca. 13.0%.

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“…Coating delamination was examined visually and graded from 1 (highest adhesion) to 7 (lowest adhesion). The principle of the test method is similar to that of ISO 1518 (Zheng et al , 2013).…”

Section: Methodsmentioning

confidence: 99%

Double layer water-borne heat insulation coatings containing hollow glass microspheres (HGMs)

Zhang

Qian

et al. 2016

PRT

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Purpose This study aims to construct a double layer heat insulation coating based on hollow glass microspheres (HGMs) and to investigate the effect of particle size on barrier property and heat insulation performance. Design/methodology/approach The waterborne double layer coating was composed of an anticorrosive epoxy ester primer and an HGM-containing silicone acrylic topcoat. With varied HGM sizes (20 μm, 40 μm, 60 μm and a 1:3 w/w mixture of 20 and 60 μm particles), the coating was immersed in 3.5 wt% NaCl solution for 28 days and was then subjected to a salt spray test for 450 h. The barrier properties of the coating were evaluated through electrochemical impedance spectroscopy. Heat insulation performance was examined using a self-made device. Findings The addition of HGMs decreased the barrier properties of the coating by creating particle/resin interfaces for water penetration. In the HGMs-containing coatings, the use of larger HGMs showed relatively good barrier properties because of the lower particle density. The coating with smaller particles yielded a higher heat insulating capacity as indicated by lower equilibrium temperatures. Research limitations/implications Future work will be focused on improving the barrier properties of the coating. Field exposure tests should also be performed to assess the long-term performance of the coating. Practical implications The mechanical properties of the coatings in this study also implied that HGMs can be used to develop scratch-resistant and impact-resistant coatings. Other potential applications for further studies include the uses of HGMs for coatings with improved fire retardancy and electromagnetic interference shielding. Originality/value A double layer coating was developed to provide balanced performance on both anticorrosion and heat insulation. The effects of HGM size were particularly highlighted.

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Discovery of VOC-compliant TEOS sol and its application to SiO2/novolac hybrid coatings

Cited by 11 publications

References 22 publications

Fabrication of hollow and porous polystyrene fibrous membranes by electrospinning combined with freeze‐drying for oil removal from water

Fabrication of hollow and porous polystyrene fibrous membranes by electrospinning combined with freeze‐drying for oil removal from water

SiC Nanowires with Tunable Hydrophobicity/Hydrophilicity and Their Application as Nanofluids

Double layer water-borne heat insulation coatings containing hollow glass microspheres (HGMs)

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