Hydrophobic Modification of Silica Surfaces via Grafting Alkoxy Groups

Luo，Ting1,4; Zeng，Wei Wang1,4; Zhang，Ruidan2; Zhou，Chuanyao1; Yang，Xueming1,3; Ren，Zefeng1

2021

10.1021/acsaelm.1c00017

ACS Applied Electronic Materials   影响因子和分区

2637-6113

The surface modification of hydrophobicity on silica is important in industrial applications. Silane adhesives, such as chlorosilane, hexamethyldisilazane, and polydimethylsiloxane, are widely used in surface hydrophobicity modification, but most silane reagents are toxic and expensive. In addition, this approach suffers from the complexity and duration of preparative methods. Here, an operable, feasible, and environmental friendly method for the hydrophobic modification on silica surfaces has been realized by grafting alkoxy groups on the surfaces via the alkoxylation reaction of alcohol molecules, for which no additional solvents are needed except alcohols. The hydrophobicity of the modified silica surface was characterized by measuring the water contact angle, larger than 90°. The origin of hydrophobicity was investigated by probing the vibrational spectra of alkoxy species on silica with surface-sensitive sum-frequency vibrational spectroscopy. Our work not only provides guidelines for efficiently designing surface structures to improve the hydrophobic performance but also is expected to replace the traditional surface modification processes using silane adhesives in industry.

alcohol alkoxylation hydrophobic modification silica sum frequency vibrational spectroscopy

SCI ; EI

英语

其他

Ministry of Science and Technology[2018YFA0208700] ; Chinese Academy of Sciences[XDB17000000] ; National Natural Science Foundation of China[21688102,91645125]

Engineering ; Materials Science

Engineering, Electrical & Electronic ; Materials Science, Multidisciplinary

WOS:000645434400018

AMER CHEMICAL SOC

20211910309386

Adhesives ; Contact angle ; Grafting (chemical) ; Hydrophobicity ; Silanes ; Silica ; Silicones

Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1 ; Physical Properties of Gases, Liquids and Solids:931.2

2-s2.0-85105077032

Scopus

1.State Key Laboratory of Molecular Reaction Dynamics,Dynamics Research Center for Energy and Environmental Materials,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,457 Zhongshan Road,116023,China
2.Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials,College of Physics and Energy,Fujian Normal University,Fuzhou,350117,China
3.Department of Chemistry,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Road,518055,China
4.University of Chinese Academy of Sciences,Beijing,19A Yuquan Road,100049,China

Luo，Ting,Zeng，Wei Wang,Zhang，Ruidan,et al. Hydrophobic Modification of Silica Surfaces via Grafting Alkoxy Groups[J]. ACS Applied Electronic Materials,2021,3(4):1691-1698.

Luo，Ting,Zeng，Wei Wang,Zhang，Ruidan,Zhou，Chuanyao,Yang，Xueming,&Ren，Zefeng.(2021).Hydrophobic Modification of Silica Surfaces via Grafting Alkoxy Groups.ACS Applied Electronic Materials,3(4),1691-1698.

Luo，Ting,et al."Hydrophobic Modification of Silica Surfaces via Grafting Alkoxy Groups".ACS Applied Electronic Materials 3.4(2021):1691-1698.