Hydrophobic organic polymer surface hydrophilic organic polymer material can be widely used in textile, medicine, construction and other industries, has been the people's attention. In practice, the hydrophobic organic polymer materials due to the non-polar surface, resulting in the wet with the aqueous solution is not ideal, so that use of the material to bring a lot of limitations, for example: for the textile industry due to Dacron fiber hydrophobic surface of the material can not be absorbed by the body leading to its fabric sweat, is not conducive to doing laundry; used as contact lenses and silicone rubber material, if not a good solution in the eyes of pro and will not be practical. Thus, to improve the surface hydrophilic hydrophobic organic polymer materials is closely related to people's lives, has become a long-term concern. It found that: the surface structure can improve the interface with the state change certain properties and the suitability of materials, through the surface chemistry of hydrophobic organic polymer material and physical treatment to improve the hydrophilic properties of the material, making it better for human use. A wetting material exists between the wetting process is typically material surface with an aqueous solution principle can be expressed by Young's equation: C s- g = C s- l + C l- gco sH (1) wherein C s- g, C s- l, C l- g, respectively, solids and gases, liquids and solids and liquid and gas surface tension (surface energy), H is the contact angle, expressed as a solid, gas, liquid three-phase equilibrium when, from the junction point of the three-phase O at Take infinitesimal unit length along the liquid - gas interface tangent, with the angle between the solid-liquid interface (folder with liquid), as shown in Figure (1): From equation (1) can be seen: the surface energy of C s- g high Solid easily wetted with water occurs. Thus, in order to improve the hydrophilicity of the material, it is necessary to improve the surface energy of the material. Most of the surface of the organic polymer material is a non-polar functional groups, the surface energy is low, the performance of a hydrophobic material, these materials may be modified to increase the surface energy, in order to achieve the purpose of improving hydrophilicity. Young's equation in Figure 1 Principle diagram 2 ways to improve the hydrophilic long been in the theory and practice have found many ways to improve the hydrophobic organic polymer materials, from the modified method can be divided into chemical and physical methods two kinds. Wherein the chemical method of surface oxidation, graft modification method, the copolymerization method, a surfactant method; physical blending method, high energy radiation and the like. 2.1 chemical modification. Method 2 1.1 Surface oxidation Surface oxidation may also be referred to as liquid-phase chemical method, i.e., by a solution having strong oxidizing chemical reactions of the surface of the hydrophobic material, thereby changing the molecular structure of the material surface , generated in the surface layer of the hydrophilic polar groups, increasing the surface energy of the material surface, improving the hydrophilicity of the material. Common oxidants are nitric acid, sulfuric acid, potassium permanganate, sodium chlorate, sodium hypochlorite, potassium dichromate, sodium dichromate, ammonium persulfate and the like. One of the most characteristic examples are polypropylene hollow fibers with a certain percentage of the surface chemical treatment of potassium dichromate with sulfuric acid, hydroxyl, carboxyl and other polar group is formed on its surface, so that the polypropylene surface is easily wetted by aqueous contact Graft Polymerization Method The graft-modified method is external excitation under certain conditions, the hydrophilic monomer or polymer having introduced into the process as a branched hydrophobic polymer surface of the organic material is polymerized, the graft-modified can the surface of the surface material can greatly increase, thereby increasing the wettability of the aqueous solution. Produce graft polymerization, there are many external excitation conditions, such as chemical grafting, electrolysis polymerization, plasma graft polymerization, grafting and UV oxidation and high energy corona discharge method. Copolymerization method copolymerization method is a hydrophobic polymer material with other polymers by chemical polymerization reaction, thereby improving its affinity with water. For example, 4-ethyl pyridine, respectively with acrylonitrile, styrene copolymers to improve acrylonitrile, styrene hydrophilic surfactant-modified Application surfactant "parents" (both hydrophilic and lipophilic) features by chemical means to a hydrophobic organic material associated therewith a lipophilic group, and the hydrophilic groups exposed on the surface, the material exhibits a hydrophilic surface. Many such modified method of application, the key technology is the choice of surfactant, usually determined according to the choice of the surfactant properties of the various hydrophobic organic polymer material. Commonly used surfactants are: sodium lauryl sulfate surface energy forming a high molecular weight organic materials, to increase the hydrophilicity of hydrophobic material. As in the application of membrane material, the hydrophobic material of PVC film with polyisobutylene - maleic anhydride copolymer (IB - co- MH) blended with PVC to improve the hydrophilic [3]. 2. 2. 2 modified method uses high-energy radiation, plasma, A ray, C-rays, high-energy ultraviolet hydrophobic organic polymer material surface modification method called high-energy radiation irradiation. Generally high-energy radiation modified method can be divided into three types: ① rely on high-energy irradiation nonpolymerizable gas; ② using polymeric film forming polymeric gas; ③ rely on high-energy radiation. Generally modified in two stages: a first stage base material to generate active points, the second phase of the material in contact with the monomer after irradiation, graft polymerization, thus improving the hydrophobic surface of the hydrophilic organic polymer material. Kur iaka etc. as with N -. Vinylpyrrolidone surface of the membrane material 3 1 hydrophilic membrane to improve with the development of technology, people are increasingly demanding the membrane material, membrane separation processes have both high permeability again have high selectivity, usually can be controlled affinity between the membrane and the permeate through the surface modification of the membrane material, so as to achieve the unity of the permeability and selectivity. Membrane materials currently used CA, PSF, PA, PVC, etc., which PSF, PVC is more hydrophobic, through chemical modification and physical modification methods to improve them hydrophilic. Membrane materials, including materials chemically modified copolymer, graft, surface oxidation and surfactant-modified method, using grafting acrylic acid, acrylamide polymerization in the PVDF molecules to improve their hydrophilic; chemical modification method development of new polymer materials PEK- C, while retaining the original performance PEK molecule based on the increase phthalocyanine groups, improved hydrophilic material; greatly improve the wettability of the material; in the presence of oxidants physical modification methods treated with a strong base film material have blend method and plasma method. Studies hydrophobic PVC film material, blending different PMMA, VC- CO- V ac hydrophilic polymer, different degrees of hydrophilicity enhancing material; the PVC I B- CO- MH blend? Preparation alloy ultrafiltration membrane, with the increase of I B- CO- MH ratio, the surface energy of the film increases, hydrophilicity increases; hydrophobic polyethersulfone and sulfonated ether ketone alloying, to improve the hydrophilic film sex; polysulfone substrate for blended polyorthoesters - b- ethylene glycol, to prepare a much improved hydrophilic polysulfone membrane material; produced by plasma polymerization polytetramethylene vinylpyridine base film in PTFT deposition, to enhance the hydrophilicity of the material. 3.2 improve the fiber surface hydrophilic polypropylene fiber and other synthetic materials with light texture, high strength, good elasticity, corrosion resistance, not ball, etc., its unique wicking fabric makes it a good material, but because hydrophilic properties of such materials is poor, can not meet the fabric absorbent capacity, rapid absorption, etc., usually require modification. After the surface hydrophilic ways to improve the lot of synthetic materials, such as copolymerization, grafting method, surfactant method, blending and energy modification method will denier polypropylene fibers by electron irradiation, and acrylic acid grafted to expand the fiber surface area, greatly improving the absorbent fiber; through the atmosphere caused by low temperature plasma treatment of acrylamide graft polymerization polypropylene fibers to produce a hydrophilic group, improve hydrophilic fibers states: the current UK has developed a A steady state of the discharge plasma reactor, at atmospheric pressure utilizing CO 2, H2 or O2 into anti polypropylene hydrocarbyl carbonyl, carboxyl, hydroxyl and other polar groups, can significantly improve the hydrophilicity of the fibers; also Under acidic conditions, the fiber with sodium hypochlorite chlorination, chlorine can be grafted onto the polymeric backbone fiber can increase 88-absorbent material; Japan's Ube Nitto Kasei flow polypropylene mixed with paraffin, treated can be prepared after the porous microporous polypropylene fibers, greatly improved absorbent fibers; chromium or chromium chloride with sulfuric polypropylene fibers modified by chemical oxidation, increased hydrophilic material. 4 nonpolar hydrophilic material to improve resin plastic, polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, silicone rubber and other nonpolar plastics material widely used in the industries, aqueous coating, etc. purposes, such hydrophobic materials so in terms of adhesion to other materials is very difficult, often used to enhance their effect by surface modification. Physical and chemical methods using ECR plasma and sodium naphthalene solution corrosion respectively PTFE-based composites or roughened surface discharge may be appropriate to improve the hydrophilic material; with strong oxidant chemical surface modification of polypropylene filler, found that wetting and mass transfer properties of the material has significantly increased; OP emulsifier used to obtain a hydrophilic polypropylene blends with better materials; describes polystyrene powder and acrylamide, methyl methacrylate - A - glycolic ester formation reaction and the plasma irradiation graft good mechanism hydrophilic material. Conclusion The use of chemical and physical methods of hydrophobic organic polymer materials hydrophilic improved to varying degrees, in favor of such materials in membrane separation, plastic adhesive, water-based paint, a variety of fabrics and other aspects of the use of hydrophobic performance of organic polymer materials to further improve opened up a new path, and has broad prospects for development. Using contact angle measurement test material properties ShengDing precision instruments http://www.dgshengding.com http://www.gdshengding.com 

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