表面改性

Abstract(#br)Gas transport behaviors of oxygen (O 2 ), nitrogen (N 2 ) and propylene (C 3 H 6 ) in polydimethylsiloxane (PDMS) mixed matrix membranes (MMM) containing modified silica (SiO 2 ) nanoparticles are presented. Two surface modified SiO 2 nanoparticles, silica dimethyloctyl silane (Si-DMOS) and silica dimethylphenyl silane (Si-DMPS), were used as fillers. Surface modification was carried out through silanization, which was confirmed via Fourier transform infrared spectroscopy.

Abstract(#br)We observed the variation in the size of microwrinkles according to the number of unit processing cycles, which consist of polydimethyl siloxane (PDMS) casting followed by the deposition of Al. As the number of processing cycles increases, the width of the microwrinkles narrows and their height increases. After five processing cycles were completed, the width of the microwrinkles stood at 1.7–3.7\u003cce:hsp sp=\"0.25\"/\u003eμm.

Abstract(#br)We propose a simple method to elaborate a filler-free stretchable PDMS surface strong enough to resist to successive elongation/retraction cycles even at high degree of stretching. It consists in creating free radicals on a filler-containing PDMS surface by argon plasma exposure and reacting them with a filler-free PDMS resin during the crosslinking step. Changes of physical and chemical properties upon plasma modification are monitored by FTIR and XPS spectroscopies, contact angle measurements and atomic force microscopy.

Abstract(#br)In-situ modification of originally hydrophobic polymer surfaces by local plasma enhanced oxidation and its application in electrically controlled fluid capillary systems are demonstrated. A microfabricated coplanar dielectric barrier discharge (DBD) plasma source was developed [1,2], integrated and applied to modify in-situ the surface properties of polydimethylsiloxane (PDMS) capillary channels.

Abstract(#br)This study aimed to improve surface polarity of polydimethylsiloxane (PDMS) membranes and provide surface active sites which were easy to react with other chemicals. 3-Aminopropyltriethoxysilane (APTES) containing an amino group was introduced into a PDMS membrane by crosslinking to prepare polyacrylonitrile hollow fiber-supported PDMS membranes with an amino-functionalized surface. Fourier transform infrared and X-ray photoelectron spectroscopic analyses proved the existence of APTES and its amino group in the PDMS membrane.

Abstract(#br)Micro directional wrinkles are widely used to functionalize the surface inside micro chips. In this paper, a nano-second laser, with the assistance of pre-strain stress, was applied to prepare tunable wrinkles on the surface of PDMS (polydimethylsiloxane). Experiments were carried out to investigate the impact of the pre-strain stress and the laser fluence on the wrinkles, like the direction and the wavelength. It was noticed that wrinkles prepared in the process grown vertically to the direction of the pre-strain stress.

Abstract(#br)A low-cost antireflection (AR) coating of polydimethylsiloxane (PDMS) with wrinkle surface structure is demonstrated. The surface modulations with controllable amplitude and period are experimentally performed by plasma surface oxidation of a pre-stretched PDMS followed by removal of the applied mechanical strain. The period and the aspect ratio of the PDMS wrinkle are dependent on plasma treatment time in the process of surface modification.

ˆ␀翗ˆ␀翗

Improvement of PDMS graphene transfer method through surface modification of target substrategraphene;dry transfer method;surface modification;polydimethylsiloxane;surface energy;In this paper, we study the dry transfer technology utilizing PDMS (Polydimethylsiloxane) stamp of a large single-layer graphene grown on Cu-foil as catalytic metal by using Chemical Vapor Deposition (CVD). By changing the surface property of the target substrate through $UV/O_3$ treatment, we can transfer the graphene on the target substrate while minimizing mechanical damages of graphene layer.