Surface modification of FO membrane by plasma-grafting polymerization to minimize protein fouling

2020 ◽  
Vol 38 ◽  
pp. 101633
Author(s):  
Watsa Khongnakorn ◽  
Weerapong Bootluck ◽  
Panitan Jutaporn
Keyword(s):  
Surface Modification ◽  
Grafting Polymerization ◽  
Protein Fouling ◽  
Plasma Grafting

The Effect of Surface Modification of Polytetrafluoroethylene (PTFE) on the Properties of POM/PTFE Fiber Composites

2015 ◽  
Vol 642 ◽  
pp. 253-258 ◽  
Author(s):  
Chi Yuan Huang ◽  
Mei Chuan Kuo ◽  
Min Lih Roan
Keyword(s):  
Surface Modification ◽  
Plasma Polymerization ◽  
Frictional Coefficient ◽  
Fiber Composites ◽  
Wear Factor ◽  
Grafting Polymerization ◽  
Plasma Grafting ◽  
Ptfe Composites ◽  
The Impact ◽  
Effect Of Surface

Surface modification of polytetrafluoroethylene (PTFE) fiber by plasma grafting polymerization with acrylamide (AAm) was studied to improve the compatibility between polyacetal (POM) and PTFE. The best modified PTFE manufactured by self-designed plasma polymerization was investigated and denoted as AAm (20wt%)-g (plasma 30min)-PTFE. The grafting polymerization is successful and shown by ESCA spectra of modified PTFE fibers. It is also proved by SEM photographs and the improvement of properties of the POM/PTFE composites. As a result, the friction coefficients, Taber wear factors, and impact strengths of composites with 85wt% of POM and 15wt% of a variety of PTFEs were investigated. The frictional coefficient of POM/ AAm (20wt%)-g (plasma 30min)-PTFE deceased to 0.162; while that of POM/PTFE was 0.174. Taber wear factor of the composite significantly decreased from 5.2 to 1.5 when the PTFE was replaced by AAm-g (plasma)-PTFE. Meanwhile, the impact strength increased from 6.1 kg-cm/cm (POM/PTFE) to 9.3kg-cm/cm (POM/ AAm-g (plasma)-PTFE). Besides, the multi-yield behaviors were found in the Stress-Strain curves of composites with modified PTFE fibers.

Controlled surface modification of silicone rubber by gamma-irradiation followed by RAFT grafting polymerization

2020 ◽  
Vol 134 ◽  
pp. 109817 ◽  
Author(s):  
Kathleen A. Montoya-Villegas ◽  
Alejandro Ramírez-Jiménez ◽  
Arturo Zizumbo-López ◽  
Sergio Pérez-Sicairos ◽  
Benjamín Leal-Acevedo ◽  
...  
Keyword(s):  
Surface Modification ◽  
Gamma Irradiation ◽  
Silicone Rubber ◽  
Grafting Polymerization

Improving Blood Compatibility of Cardiovascular Devices by Surface Modification

2007 ◽  
Vol 342-343 ◽  
pp. 801-804 ◽  
Author(s):  
Nan Huang ◽  
Ping Yang ◽  
Yong Xiang Leng ◽  
Jun Ying Chen ◽  
Jin Wang ◽  
...  
Keyword(s):  
Surface Modification ◽  
Artificial Heart ◽  
Heart Valves ◽  
Blood Compatibility ◽  
Artificial Heart Valve ◽  
Cardiovascular Devices ◽  
Inorganic Films ◽  
Artificial Heart Valves ◽  
Plasma Grafting ◽  
Circulation Tube

This paper presents recent activities on the surface modification of blood contacting biomaterials and devices in the author’s laboratory. Surface coating of inorganic films on materials for artificial heart valves, ventricular pumps and coronary stents, such as titanium, stainless steel and low temperature isotropic pryolitc carbon, etc, shows a significant improvement in the anticoagulation behavior. Further, the formation of functional groups such as hydroxyl or amino groups and the binding of biomolecules as well as seeding of endothelial cell shows the promise of biomimetic surface formation. Plasma grafting on materials for artificial heart valve sewing cuff, extracorporeal circulation tube, etc, such as PET, PU, PVC polymers, revealed a significant improvement of anti-platelet adhesion as well as anti-bacterial properties.

Immobilization of Silk Fibroin as Scaffold for Cell Culture by Plasma Grafting Polymerization

2013 ◽  
Vol 802 ◽  
pp. 53-58 ◽  
Author(s):  
Somruthai Tunma ◽  
Eakkarach Kanjai ◽  
Jompak Nuandee ◽  
D. Boonyawan
Keyword(s):  
Porous Structure ◽  
Silk Fibroin ◽  
Treatment Time ◽  
Cell Attachment ◽  
Argon Plasma ◽  
Rf Power ◽  
Working Pressure ◽  
Grafting Polymerization ◽  
Plasma Grafting ◽  
Low Efficiency

According to the low efficiency of cell attachment and proliferation on commercial polystyrene (PS) dish, scaffold with porous structure on the polystyrene dish is required to improve the cell attachment and proliferation efficiency on the dish. The scaffold with porous structure was fabricated from a solution of powdered silk fibroin by plasma grafting polymerization technique. Argon plasma was utilized by a 13.56 MHz capacitively coupled discharge (CCP) reactor at working pressure of 100 mTorr. Rf power, plasma treatment time, and the cycle of grafting on the dish were varied. The proper treatment time and rf power set to 10 minutes and 100 W, respectively. The experimental results showed the uniformly and highly distributed of porosity of fibroin scaffold on the PS dish surface. The Ar-treated dish had lower UV-Vis absorbance than the untreated dish indicating the efficiency of grafting between fibroin structure and treated PS surface is better than the untreated surface. The absorbance spectra of phanyalanine at 280 nm affirmed the success of the fibroin amino acid grafting to PS aromatic structure.

Surface Modification of Low-Density Polyethylene Films via Photografting Polymerization Technique

2006 ◽  
Vol 11-12 ◽  
pp. 437-440 ◽  
Author(s):  
Wei Ning ◽  
Jian Ping Deng ◽  
Wan Tai Yang
Keyword(s):  
Surface Modification ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Xps Analysis ◽  
Step Method ◽  
Grafting Polymerization ◽  
Polyethylene Films ◽  
Ldpe Film ◽  
One Step

Surface modification of low-density polyethylene (LDPE) films was carried out via a novel photografting polymerization technique with acrylamide (AAm) as the monomer. The photografting polymerization can be achieved via one-step method and two-step method. The photografting polymerization reactivity of AAm was examined with benzophenone (BP) as the photoinitiator and low-density polyethylene (LDPE) film as the substrate with “sandwich” assembly. Moreover, the occurrence and evolution of grafting polymerization of AAm on the substrate was demonstrated XPS analysis and SEM pictures.

Research in Surface Modification and Anti-Fouling of Polypropylene Porous Membrane

2013 ◽  
Vol 634-638 ◽  
pp. 353-356
Author(s):  
Chao Lin Miao ◽  
Hui Wang
Keyword(s):  
Surface Modification ◽  
Photoelectron Spectroscopy ◽  
Membrane Surface ◽  
Porous Membrane ◽  
Grafting Polymerization ◽  
X Ray ◽  
Force Microscopy ◽  
Polypropylene Membrane ◽  
Atomic Force ◽  
Scanning Electron

Surface modification of microporous polypropylene membrane was performed by grafting polymerization of acrylamide.The morphological and microstructure changes of the membrane surface were confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and atomic force microscopy. The results indicate that the pore size of the grafted membrane was reduced.

A facile approach to modify poly(dimethylsiloxane) surfaces via visible light-induced grafting polymerization

2015 ◽  
Vol 3 (4) ◽  
pp. 629-634 ◽  
Author(s):  
Xinhong Xiong ◽  
Zhaoqiang Wu ◽  
Jingjing Pan ◽  
Lulu Xue ◽  
Yajun Xu ◽  
...  
Keyword(s):  
Surface Modification ◽  
Visible Light ◽  
Room Temperature ◽  
Functional Surface ◽  
Grafting Polymerization

We have demonstrated a simple and effective approach for the functional surface modification of poly(dimethylsiloxane) (PDMS) via visible light-induced grafting polymerization at room temperature.

Surface modification of PVDF membranes with sulfobetaine polymers for a stably anti-protein-fouling performance

2012 ◽  
Vol 125 (5) ◽  
pp. 4015-4027 ◽  
Author(s):  
Qian Li ◽  
Bo Zhou ◽  
Qiu-Yan Bi ◽  
Xiao-Lin Wang
Keyword(s):  
Surface Modification ◽  
Protein Fouling
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