期刊论文

Qing, Yan(qingyan0429@163.com)

英文

Chemical Engineering Journal

1385-8947

2021

416

129078

10.1016/j.cej.2021.129078

As shown in Fig. 1a, in the hydrolysis process of SHC surface preparation with SiO2 and VTES, the three ethoxys of one VTES molecule are transformed into hydroxyl groups with the catalysis of NaOH and energy provided by ultrasound [48]. With the drive of IM forces between –OH groups, the hydrolyzed VTES (VTES-OH) molecules take self-polycondensation and graft on the hydrophilic SiO2 nanoparticle. This grafting process of VTES-OH is a critical procedure in the modification of low-surface-energy.

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Island-like structure induced by hydroxyl groups has been demonstrated to pose significant influence on tuning surface morphology and wettability. Herein, with an intention to better understand this structural transformation, hydroxyl groups both from nanoparticles and substrates were controlled during the thermally-driven deposition procedure. The results show that hydroxyl groups originated from nanoparticles facilitate the fabrication of island-like structure, while these groups from substrates confine. Representatively, hydroxyl-rich TiO2 n...