Functionalization of PDMS modified and plasma activated two-component polyurethane coatings by surface attachment of enzymes

REMOVED: Atmospheric-pressure DBD plasma-assisted surface modification of polymethyl methacrylate: A study on cell growth/proliferation and antibacterial properties

“…5(a) and (b)). It has been suggested that aging effect is mainly due to two processes: (1) reorientation of polar chemical groups towards the bulk of the material to reduce the surface energy, and (2) diffusion of polar chemical groups in the polymer matrix [45,46]. In some cases, the relative reduction in contact angle with time is observed that may be due to oxygen capture from ambient air and creation of more polar surfaces.…”

Large-Area and High-Throughput PDMS Microfluidic Chip Fabrication Assisted by Vacuum Airbag Laminator

“…After that, the force slowly decreased with R m . Therefore, the maximum force of 739 kPa was obtained under the conditions of R m = 12:1, T = 200 °C, and t h = 4 h, which is higher than the plasma-aided bonding and interference-assisted thermal bonding [ 29 , 32 ]. Such parameters were then used commonly for the rest of experiments in this work.…”

“…In addition, various issues like bonding strength, interfacial stress, microchannel fidelity, solvent compatibility, surface chemistry, and optical properties of the bonded microfluidic chips should all be taken into account for the selection of appropriate bonding methods. So far, a variety of bonding technologies have been developed to seal PDMS-based microfluidic chips, such as thermal bonding [ 22 ], solvent bonding [ 23 ], plasma-aided bonding [ 24 , 25 , 26 ], adhesive bonding [ 27 , 28 ], and ultrasonic welding [ 29 , 30 ]. However, the limitations of either fabrication size or materials selectivity are obvious for these methodologies.…”

NQS-Doped PDMS Solid Sensor: From Water Matrix to Urine Enzymatic Application

“…The functionalization mechanism for covalent urease enzyme immobilization on borosilicate glass balls support (5 mm diameter) was carried out following a combination of experimental procedures found in the literature for silicate-based materials [44][45][46]. Initially, glass balls were treated with a mixture of H 2 O:HCl (37%):H 2 O 2 (30%) (5:1:1) and continuously stirred for 2 h. Afterward, the mixture was removed, and the glass balls were washed with deionized water and air-dried.…”