In Situ Fabrication of a Superhydrophobic ORMOSIL Coating on Wood by an Ammonia–HMDS Vapor Treatment

Yue, Decai; Feng, Qifan; Huang, Xuanting; Zhang, Xin‐Xiang; Chen, Hanxian

doi:10.3390/coatings9090556

Cited by 16 publications

(19 citation statements)

References 26 publications

(27 reference statements)

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“…Organically modified silicates (ORMOSILs) are hybrid silicon xerogels that combine the mechanical, thermal, and structural rigidity and stability of inorganic materials with the flexibility and functionality of organic molecules [ 1 ]. These properties favor their utilization as chemical and optical sensors [ 2 , 3 , 4 , 5 , 6 , 7 ], catalysts [ 8 , 9 ], coatings [ 10 , 11 , 12 , 13 , 14 ], chromatographic agents [ 15 , 16 ], nanoprobes, and photovoltaic cells [ 17 , 18 ], among others.…”

Section: Introductionmentioning

confidence: 99%

Novel Organochlorinated Xerogels: From Microporous Materials to Ordered Domains

et al. 2021

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Hybrid silica xerogels combine the properties of organic and inorganic components in the same material, making them highly promising and versatile candidates for multiple applications. They can be tailored for specific purposes through chemical modifications, and the consequent changes in their structures warrant in-depth investigation. We describe the synthesis of three new series of organochlorinated xerogels prepared by co-condensation of tetraethyl orthosilicate (TEOS) and chloroalkyltriethoxysilane (ClRTEOS; R = methyl [M], ethyl [E], or propyl [P]) at different molar ratios. The influence of the precursors on the morphological and textural properties of the xerogels was studied using 29Si NMR (Nuclear Magnetic Resonance), FTIR (Fourier-Transform Infrared Spectroscopy), N2, and CO2 adsorption, XRD (X-ray Diffraction), and FE-SEM (Field-Emission Scanning Electron Microscopy). The structure and morphology of these materials are closely related to the nature and amount of the precursor, and their microporosity increases proportionally to the molar percentage of ClRTEOS. In addition, the influence of the chlorine atom was investigated through comparison with their non-chlorinated analogues (RTEOS, R = M, E, or P) prepared in previous studies. The results showed that a smaller amount of precursor was needed to detect ordered domains (ladders and T8 cages) in the local structure. The possibility of coupling self-organization with tailored porosity opens the way to novel applications for this type of organically modified silicates.

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Section: Introductionmentioning

confidence: 99%

Novel Organochlorinated Xerogels: From Microporous Materials to Ordered Domains

et al. 2021

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“…The hydrophobization of the micro-/nanoscale architecture could also be achieved by replacing the resins with low surface free energy components [113][114][115][116][117][118][119][120][121][122][123][124][125][126][127][128][129][130][131][132]. As a general rule, these coatings showed superhydrophobicity (contact angle > 150 • , roll-off angle < 10 • ), high resistance to mechanical wear (abrasion, cutting, etc.…”

Section: Organic-inorganic Composite Coatingsmentioning

confidence: 99%

“…These methods were adopted in different publications presented in this review to improve the characteristics of the wood surfaces, such as mechanical properties, thermal stability, dimensional stability and resistance to biodegradation. They were particularly prevalent to cast inorganic [115][116][117][118]121,122,132,147,148,150,151,153,154,[156][157][158][160][161][162][163][164][165][166]170,172] and organicinorganic composite [87,88,103,[105][106][107][109][110][111][112][113][114][125][126][127][129][130][131][134][135][136][137]…”

Section: Economical Aspectsmentioning

confidence: 99%

Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

Blanchet

Pepin

2021

Coatings

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Increasing the use of wood in buildings is regarded by many as a key solution to tackle climate change. For this reason, a lot of research is carried out to develop new and innovative wood surface improvements and make wood more appealing through features such as increased durability, fire-retardancy, superhydrophobicity, and self-healing. However, in order to have a positive impact on the society, these surface improvements must be applied in real buildings. In this review, the last five years of research in the domain of wood surface improvements and modifications is first presented by sorting the latest innovations into different trends. Afterward, these trends are correlated to specifications representing different normative, ecologic and economic factors which must be considered when expecting to introduce a wood treatment to the market. With this review, the authors hope to help researchers to take into consideration the different factors influencing whether new innovations can leave the research laboratory or not, and thereby facilitate the introduction of new wood surface treatments in the society.

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“…Organically modified silicon xerogels (ORMOSILs) are attracting considerable interest for their application in new-generation technologies, being utilized in chemical and optical sensors [ 1 , 2 , 3 , 4 , 5 , 6 ], for catalysis [ 4 , 5 ], in coatings [ 6 , 7 , 8 , 9 , 10 ], for chromatography [ 11 , 12 ], and in pharmacy [ 13 ]. They have great chemical versatility and can be efficiently modified for specific applications due to their combination of highly varied mechanical, optical and textural properties [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Xerogels: Study of the Sol-Gel Process and Local Structure by Vibrational Spectroscopy

et al. 2021

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The properties of hybrid silica xerogels obtained by the sol-gel method are highly dependent on the precursor and the synthesis conditions. This study examines the influence of organic substituents of the precursor on the sol-gel process and determines the structure of the final materials in xerogels containing tetraethyl orthosilicate (TEOS) and alkyltriethoxysilane or chloroalkyltriethoxysilane at different molar percentages (RTEOS and ClRTEOS, R = methyl [M], ethyl [E], or propyl [P]). The intermolecular forces exerted by the organic moiety and the chlorine atom of the precursors were elucidated by comparing the sol-gel process between alkyl and chloroalkyl series. The microstructure of the resulting xerogels was explored in a structural theoretical study using Fourier transformed infrared spectroscopy and deconvolution methods, revealing the distribution of (SiO)4 and (SiO)6 rings in the silicon matrix of the hybrid xerogels. The results demonstrate that the alkyl chain and the chlorine atom of the precursor in these materials determines their inductive and steric effects on the sol-gel process and, therefore, their gelation times. Furthermore, the distribution of (SiO)4 and (SiO)6 rings was found to be consistent with the data from the X-Ray diffraction spectra, which confirm that the local periodicity associated with four-fold rings increases with higher percentage of precursor. Both the sol-gel process and the ordered domains formed determine the final structure of these hybrid materials and, therefore, their properties and potential applications.

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In Situ Fabrication of a Superhydrophobic ORMOSIL Coating on Wood by an Ammonia–HMDS Vapor Treatment

Cited by 16 publications

References 26 publications

Novel Organochlorinated Xerogels: From Microporous Materials to Ordered Domains

Novel Organochlorinated Xerogels: From Microporous Materials to Ordered Domains

Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

Hybrid Xerogels: Study of the Sol-Gel Process and Local Structure by Vibrational Spectroscopy

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