Surface modification of polypropylene microporous membrane by grafting acrylic acid using physisorbed initiators method

2009 ◽  
Vol 112 (6) ◽  
pp. 3728-3735 ◽  
Author(s):  
Hui Wang ◽  
Yanhong Yin ◽  
Shuting Yang ◽  
Chengbin Li
Keyword(s):  
Surface Modification ◽  
Acrylic Acid ◽  
Microporous Membrane

Plasma Surface Modification of Silica and its Application in Epoxy Molding Compounds for Large-Scale Integrated Circuits Packaging

2010 ◽  
Vol 158 ◽  
pp. 184-188 ◽  
Author(s):  
Ming Shan Yang ◽  
Lin Kai Li ◽  
Jian Guo Zhang
Keyword(s):  
Surface Modification ◽  
Acrylic Acid ◽  
Integrated Circuits ◽  
Plasma Polymerization ◽  
High Speed ◽  
Large Scale ◽  
Treatment Time ◽  
Rf Plasma ◽  
Formaldehyde Resin ◽  
Molding Compounds

The surface modification of silica for epoxy molding compounds (EMC) was conducted by plasma polymerization using RF plasma (13.56MPa), and the modification factors such as plasma power, gas pressure and treatment time were investigated systematically in this paper. The monomers utilized for the plasma polymer coatings were pyrrole, 1,3-diaminopropane, acrylic acid and urea. The plasma polymerization coating of silica was characterized by FTIR, contact angle. Using the silica treated by plasma as filler, ortho-cresol novolac epoxy as main resin, novolac phenolic-formaldehyde resin as cross-linking agent and 2-methylmizole as curing accelerating agent, the EMCs used for the packaging of large-scale integrated circuits were prepared by high-speed pre-mixture and twin roller mixing technology. The results have shown that the surface of silica can be coated by plasma polymerization of pyrrole, 1,3-diaminopropane, acrylic acid and urea, and the comprehensive properties of EMC were improved.

scholarly journals SURFACE MODIFICATION OF TITANIUM DIOXIDE NANOPARTICLES WITH ACRYLIC ACID/ISOBUTYLENE COPOLYMER UNDER ULTRASONIC TREATMENT

2019 ◽  
Vol 16 (32) ◽  
pp. 338-344
Author(s):  
Nikolay A. BULYCHEV ◽  
Lev N. RABINSKIY
Keyword(s):  
Titanium Dioxide ◽  
Surface Modification ◽  
Composite Materials ◽  
Acrylic Acid ◽  
Ultrasonic Treatment ◽  
Titanium Dioxide Nanoparticles ◽  
Polymer Coatings ◽  
Pigment Surface ◽  
Electrokinetic Sonic Amplitude ◽  
Modification Of Titanium

The influence of the ultrasonic treatment of block copolymer solution on its solid-liquid interface behavior was investigated in detail. The surface modification of titanium dioxide nanoparticles in aqueous dispersions of specially tailor-made periodic acrylic acid/isobutylene copolymer by ultrasonic treatment was studied in order to get new approaches for the creation of hybrid composite materials or polymer coatings. The pigment surface modification by the above copolymer was comparatively investigated regarding conventional adsorption as contrasted to an ultrasonic treatment assisted procedure. The course and efficiency of the polymer adsorption onto the pigment surface were quantified by electrokinetic sonic amplitude measurements. The higher efficiency of the pigment surface coating by the copolymer as achieved by ultrasonic treatment in comparison to conventional adsorption is a consequence of ultrasonically induced pigment surface activation. Two perspective avenues of the utilization of the discovered effects for creation of organic-inorganic composite materials are anticipated: the nanoparticles could first be treated by ultrasound in the presence of polymers and so create a surface modifying coating and the second option is an entrainment of the nanoparticles into the monomer matrix which can be polymerized afterward yielding a polymer with immobilized nanoparticles.

Preparation and Surface Modification of Poly(acrylonitrile-co-acrylic acid) Electrospun Nanofibrous Membranes

2008 ◽  
Vol 61 (6) ◽  
pp. 446 ◽  
Author(s):  
Ai-Fu Che ◽  
Xiao-Jun Huang ◽  
Zhen-Gang Wang ◽  
Zhi-Kang Xu
Keyword(s):  
Surface Modification ◽  
Acrylic Acid ◽  
Photoelectron Spectroscopy ◽  
Platelet Adhesion ◽  
Coupling Reaction ◽  
Processing Parameters ◽  
Electrospinning Technique ◽  
Nanofibrous Membranes ◽  
Atr Spectroscopy ◽  
Poly Acrylonitrile

Poly(acrylonitrile-co-acrylic acid) (PANCAA) was synthesized and fabricated into nanofibrous membranes by an electrospinning technique. Scanning electron microscopy revealed that membranes composed of uniformly thin and smooth nanofibres were obtained under optimized processing parameters. Surface modification with chitosan on these nanofibrous membranes was accomplished by a coupling reaction between the carboxylic groups of PANCAA and the primary amino groups of chitosan. Fluorescent labelling, weight measurement, FT-IR/ATR spectroscopy, and X-ray photoelectron spectroscopy (XPS) were used to confirm the modification process and determine the immobilization degree of chitosan. Platelet adhesion experiments were further carried out to evaluate the hemocompatibility of the studied nanofibrous membranes. Preliminary results indicated that the immobilization of chitosan on the PANCAA nanofibrous membranes was favourable for platelet adhesion.

Surface modification of ethylene-co-acrylic acid copolymer films: Addition of amide groups by covalently bonded amino acid intermediates

2004 ◽  
Vol 92 (3) ◽  
pp. 1688-1694 ◽  
Author(s):  
Ning Luo ◽  
Michael J. Stewart ◽  
Douglas E. Hirt ◽  
Scott M. Husson ◽  
Dwight W. Schwark
Keyword(s):  
Surface Modification ◽  
Amino Acid ◽  
Acrylic Acid ◽  
Copolymer Films ◽  
Acid Copolymer ◽  
Covalently Bonded ◽  
Acrylic Acid Copolymer

Surface Modification with Poly(sulfobetaine methacrylate-co-acrylic acid) To Reduce Fibrinogen Adsorption, Platelet Adhesion, and Plasma Coagulation

2011 ◽  
Vol 12 (12) ◽  
pp. 4348-4356 ◽  
Author(s):  
Wei-Hsuan Kuo ◽  
Meng-Jiy Wang ◽  
Hsiu-Wen Chien ◽  
Ta-Chin Wei ◽  
Chiapyng Lee ◽  
...  
Keyword(s):  
Surface Modification ◽  
Acrylic Acid ◽  
Platelet Adhesion ◽  
Plasma Coagulation ◽  
Fibrinogen Adsorption

Surface Modification for Polystyrene Colloidal Particles with Controlled Charge Densities

2007 ◽  
Vol 7 (11) ◽  
pp. 3995-3999
Author(s):  
Jongman Lee ◽  
Oh-Sun Kwon ◽  
Kwanwoo Shin ◽  
Ju-Myung Song ◽  
Joon-Seop Kim ◽  
...  
Keyword(s):  
Surface Modification ◽  
Acrylic Acid ◽  
Surface Charge Density ◽  
Colloidal Particles ◽  
Mixed Solvent ◽  
Pure Water ◽  
Random Copolymer ◽  
Aqueous Dispersions ◽  
Charge Densities ◽  
Quenching Process

A significant amount of polystyrene sulfonated acid (PSSA) and poly(styrene-ran-acrylic acid) (PSAA) random copolymer can be adsorbed by dispersion of PS particles via a swelling-quenching process. A THF-water mixed solvent was used in the swelling process and a large amount of pure water was used, to give a low concentration of THF% in quenching process. Our results showed that functional PSSA groups were randomly and tightly adsorbed to the PS particles. When the mol.% of charged segments was increased, the progressive adsorption of PSSA chains to the PS particles leads to an increase in the electrophoretic mobility and zeta-potential of aqueous dispersions. Thus, we were able to obtain well-distributed surface charge density on the PS particles.

Sign in / Sign up

Export Citation Format

Share Document