Non-supercritical drying sol–gel preparation of superhydrophobic aerogel ORMOSIL thin films with controlled refractive index

Zhang, Xin‐Xiang; Su, Wenmu; Lin, Mingyue; Miao, Xiaowei; Ye, Longqiang; Yang, Wenbin

doi:10.1007/s10971-015-3638-z

Cited by 20 publications

(9 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our previous study indicated that the average pore radius of sol-gel silica from nitrogen adsorption/desorption analysis is about 2.6 nm, which indicates the pore diameter of sol-gel silica AR coating is about 5.2 nm. 41 The theoretical molecule weight of 0.2PMHS, 1.0PMHS and 1.5PMHS is calculated to be about 12 036, 2416 and 1602, respectively, and then the length of extended chains is estimated to be about 47 nm, 10 nm and 7 nm, respectively. (See ESI: † theoretical calculation of molecule weight and estimation of chain length of PMHS).…”

Section: Speculation and Verication Of Pmhs Surface Modication Processmentioning

confidence: 99%

A simple method to control the microstructure and properties of sol–gel silica antireflective coatings

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Speculation and Verication Of Pmhs Surface Modication Processmentioning

confidence: 99%

A simple method to control the microstructure and properties of sol–gel silica antireflective coatings

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…While fabrication of thin-films with graded index profiles is challenging, a variety of methods for fabricating high-quality thin-films with a range of optical properties, including oblique angle deposition, plasma-enhanced chemical vapor deposition, and sol-gel processes exist and they are presently being developed for greater control over film properties [32][33][34][35][36][37][38][39]. Furthermore, recent research has been directed towards the development of transparent films with very low indices of refraction, such as mesoporous and aerogel films [40][41][42][43]. Future research will focus on using low-index films to reduce the number of layers required for fabricating the TPCHMs because the amount of thermal radiation they reflect increases with increasing contrast between their high-and low-index of refraction layers.…”

Section: Resultsmentioning

confidence: 99%

Transparent Photonic Crystal Heat Mirrors for Solar Thermal Applications

2020

View full text Add to dashboard Cite

Numerical calculations are performed to determine the potential of using one-dimensional transparent photonic crystal heat mirrors (TPCHMs) as transparent coatings for solar receivers. At relatively low operating temperatures of 500 K, the TPCHMs investigated herein do not provide a significant advantage over conventional transparent heat mirrors that are made using transparent conducting oxide films. However, the results show that TPCHMs can enhance the performance of transparent solar receiver covers at higher operating temperatures. At 1000 K, the amount of radiation reflected by a transparent cover back to the receiver can be increased from 40.4% to 60.0%, without compromising the transmittance of solar radiation through the cover, by using a TPCHM in the place of a conventional transparent mirror with a In2O3:Sn film. For a receiver operating temperature of 1500 K, the amount of radiation reflected back to the receiver can be increased from 25.7% for a cover that is coated with a In2O3:Sn film to 57.6% for a cover with a TPCHM. The TPCHM that is presented in this work might be useful for high-temperature applications where high-performance is required over a relatively small area, such as the cover for evacuated receivers or volumetric receivers in Sterling engines.

show abstract

“…Absorption bands at 1161, 1108, 1056, and 1032 cm −1 were attributed to C-O-C vibrations in the cellulose intra-and intermolecular structure [51,52]. For PMHS-modified cotton fabric, the grafting of PMHS chains on cotton fabrics is demonstrated by the appearance of bands from 2965, 1260, 835, and 765 cm −1 that correspond to the vibration of the Si-CH 3 group [53][54][55][56][57] of the PMHS chain and by an absorption band located at 2165 cm −1 that corresponds to the Si-H asymmetric stretch mode of the PMHS chain [58]. The obvious appearance of an -Si-H absorption band was attributed to the steric effect of plentiful -CH 3 groups on the PMHS chains.…”

Section: Chemical Structure Analysismentioning

confidence: 99%

Highly Hydrophobic Cotton Fabrics Modified by Poly(methylhydrogen)siloxane and Fluorinated Olefin: Characterization and Applications

Lin

Liao

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

Highly hydrophobic cotton fabrics were obtained with poly(methylhydrogen)siloxane (PMHS) and a further fluorinated olefin modification. The chemical structures and microstructures of PMHS-modified cotton fabrics were characterized, and application of the resultant cotton fabrics in stain resistance and oil–water separation was demonstrated. PMHS chains with very low surface energy were grafted onto cotton fabric by the dehydrogenation reaction between –Si–H of PMHS and –OH groups of cotton fabric at room temperature. The water contact angle of PMHS-modified cotton fabric was 141.7°, which provided the modified cotton fabric with good stain resistance to waterborne pollutants. The separation efficiency of diesel from water was higher than 92% for 20 repeatable separation cycles. A further improvement in stain resistance to oil was also demonstrated by a further addition reaction of 1H,1H,2H-perfluoro-1-decene with PMHS-modified cotton fabric.

show abstract

Non-supercritical drying sol–gel preparation of superhydrophobic aerogel ORMOSIL thin films with controlled refractive index

Cited by 20 publications

References 40 publications

A simple method to control the microstructure and properties of sol–gel silica antireflective coatings

A simple method to control the microstructure and properties of sol–gel silica antireflective coatings

Transparent Photonic Crystal Heat Mirrors for Solar Thermal Applications

Highly Hydrophobic Cotton Fabrics Modified by Poly(methylhydrogen)siloxane and Fluorinated Olefin: Characterization and Applications

Contact Info

Product

Resources

About