Pervaporative dehydration of ethanol-water solution through asymmetric PC membrane surface modified via residual air plasma-induced graft polymerization of HEMA

2010 ◽  
Vol 17 (1-3) ◽  
pp. 210-217 ◽  
Author(s):  
Manuel De Guzman ◽  
Kueir-Rarn Lee ◽  
Juin-Yih Lai
Keyword(s):  
Graft Polymerization ◽  
Water Solution ◽  
Membrane Surface ◽  
Air Plasma ◽  
Surface Modified ◽  
Residual Air

scholarly journals Studies on Modification of Surface Properties in Polycarbonate (PC) Film Induced by DC Glow Discharge Plasma

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
K. A. Vijayalakshmi ◽  
M. Mekala ◽  
C. P. Yoganand ◽  
K. Navaneetha Pandiyaraj
Keyword(s):  
Contact Angle ◽  
Glow Discharge ◽  
Plasma Treatment ◽  
Polymer Surface ◽  
Peel Test ◽  
Glow Discharge Plasma ◽  
Polar Component ◽  
Air Plasma ◽  
Modified Surface ◽  
Surface Modified

The polycarbonate film (PC) surface was treated using glow discharge low-pressure air plasma. The modified surface was characterized by contact angle, FTIR, XRD, AFM, and XPS analysis. The surface-modified samples were further investigated using T-peel test for technical applications. The surface energy of the sample was estimated by measuring contact angle. The results show that, after plasma treatment, the root mean square (RMS) roughness of PC film was gradually increased with exposure time. Plasma treatment modified the chemical composition of the polymer surface and it made the surface to be highly hydrophilic. It was found that the air plasma treatment increases the polar component of PC film.

Characterization of Reverse Osmosis Membrane Surface Modified by Silane-epoxy Using UV

2018 ◽  
Vol 28 (3) ◽  
pp. 169-179 ◽  
Author(s):  
Hee Min Park ◽  
◽  
Won Yong Yang ◽  
Yong Taek Lee
Keyword(s):  
Reverse Osmosis ◽  
Membrane Surface ◽  
Reverse Osmosis Membrane ◽  
Surface Modified

scholarly journals Effect of Plasma Pretreatment on Thermal Durability of Thermal Barrier Coatings in Cyclic Thermal Exposure

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Sang-Won Myoung ◽  
Zhe Lu ◽  
Yeon-Gil Jung ◽  
Byung-Koog Jang ◽  
Young-Soo Yoo ◽  
...  
Keyword(s):  
Bond Coat ◽  
Thermal Exposure ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Bond Coats ◽  
Thermal Durability ◽  
Thermomechanical Characteristics ◽  
Barrier Coating ◽  
Plasma Pretreatment ◽  
Surface Modified

Plasma pretreatment on the top and bond coats was performed and its influence on the thermal durability of thermal barrier coating (TBC) system was investigated through cyclic thermal exposure. Two types of bond coat were prepared by different methods, namely, air plasma spray (APS) and high-velocity oxy-fuel (HVOF), and two kinds of feedstock powder were employed for preparing the top coat in APS process. The better thermal durability was achieved in the vertically cracked TBC with the surface modified bond coat or with the bond coat prepared by APS process. The hardness and fracture toughness values of TBCs increased because of densification of the top coat during cyclic thermal exposure, and the bond coat prepared by HVOF process showed higher values than that by APS process. The TBCs with the surface modified bond coat were more efficient in improving adhesive strength than those without plasma pretreatment on the bond coat. The relationship between microstructure evolution and thermomechanical characteristics of TBCs with plasma pretreatment was discussed in cyclic thermal exposure.

PET Fiber Surface Modified with Amine Group

2014 ◽  
Vol 1081 ◽  
pp. 249-253
Author(s):  
Guo Liang Dai ◽  
Mei Wu Shi ◽  
Hong Xiao
Keyword(s):  
Chemical Structure ◽  
Graft Polymerization ◽  
Moisture Absorption ◽  
Fiber Surface ◽  
Amine Group ◽  
Excellent Performance ◽  
Reactive Groups ◽  
Pet Fibers ◽  
Amine Groups ◽  
Surface Modified

PET material has excellent performance and its modification of biocompatibility had been concerned for researchers. In this paper, graft polymerization of acrylamide on PET fiber by co-irradiation was investigated, and then treated in 5% available chlorine content of NaClO solution, which make the amide groups on the PET fiber surface into amine groups, and provide the reactive groups for further functional modification. The results showed that the moisture absorption of PET fiber increases after the grafting of acrylamide, and its hygroscopicity increases with the increase of grafting yields; after the amide groups converted into the amine groups, the hygroscopicity of PET fibers decreases. The chemical structure and surface morphology of PET fiber and modified products were characterized by ATR-FTIR and SEM, which certified that acrylamide had been successfully grafted on PET fibers and the amide groups on its surface had been converted into the amine groups.

Study on ELISA Plates Modified with Methylacrylic Acid by 60Co Irradiation

2014 ◽  
Vol 670-671 ◽  
pp. 219-223
Author(s):  
Di Chen ◽  
Hua Shan Wang
Keyword(s):  
Room Temperature ◽  
Volume Concentration ◽  
Water Solution ◽  
Carboxyl Group ◽  
Optimum Conditions ◽  
Water Contact ◽  
Radiative Intensity ◽  
Enzyme Label ◽  
Γ Ray ◽  
Surface Modified

Surface modified ELISA plates grafted with methylacrylic acid (MAA) were prepared by60Co γ-Ray irradiation at room temperature in MAA water solution. The optimum conditions of modification were decided by the water contact angle and the absorbency of polystyrene enzyme label plate. FTIR, XRD spectra and AFM images show that MAA and its polymer have been grafted to the surface of the ELISA plates induced by60Co γ-Ray irradiation. The volume concentration of MAA aqueous solutions reached 10%, and the radiative intensity was 10kGy, and correspondingly, the content of carboxyl group on the surface of ELISA plates reached 0.30mmol/cm2.

scholarly journals Characterization of Mussel Inspired Surface Modified and Metal Chelated Polymer Membrane

2020 ◽  
Vol 9 (3) ◽  
pp. 2847-2852
Keyword(s):  
Polyvinylidene Fluoride ◽  
Membrane Surface ◽  
Chelating Agent ◽  
Flux Analysis ◽  
Permeate Flux ◽  
Functional Protein ◽  
Metal Chelating ◽  
Coating Absorption ◽  
Surface Modified

Modification of a membrane surface is critical to help further functional protein binding on the membrane. Mussel inspired modification and metal chelating agent grafting on the polyvinylidene fluoride (PVDF) is proposed to increase the hydrophilicity, stability, and functionality of the membrane. This study carried out a four steps modification including polymerization of dopamine, grafting with poly (ethyleneimine) (PEI) and metal chelating agent and finally metal (ZnO) coupling. Characterization of the modified membrane was carried out using contact angle observation, permeate flux analysis, FT-IR spectrum and FESEM analysis. The results show a successful PDA and PEI deposition on PVDF membrane with significant improvement of the membrane hydrophilicity and wettability. Permeate flux analysis showed blockage on membrane surface due to the successful coating. Absorption peak increased slightly showing the deposition of PDA/PEI. Successful Zn2+ ion coupling can be seen clearly from the FESEM analysis

Construction of a Comb-like Glycosylated Membrane Surface by a Combination of UV-Induced Graft Polymerization and Surface-Initiated ATRP

Langmuir ◽  
2007 ◽  
Vol 23 (12) ◽  
pp. 6684-6690 ◽  
Author(s):  
Qian Yang ◽  
Jing Tian ◽  
Meng-Xin Hu ◽  
Zhi-Kang Xu
Keyword(s):  
Graft Polymerization ◽  
Membrane Surface
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