 |
Polymerization of trace amounts of monomer solution through the generation and diffusion of catalysts between "sandwich" structures
UV-induced surface-initiated atom transfer radical polymerization schematic
The National Key Laboratory of Solid Lubrication, Institute of Solid State Lubricants, Chinese Academy of Sciences, has made progress in the study of polymer brushes in cooperation with Nehemiah University and the Hong Kong Polytechnic University. Research work was published in the recently published Angew. Chem. Int. Ed. (2013, DOI: 10.1002 / anie.201304449) and Adv. Mater. (2013, 25, 3343-3350).
Surface-initiated Atom Transfer Radical Polymerization (SI-ATRP) is the main method for constructing the interface of brush-type soft materials on the substrate surface, but still faces outstanding problems: the reaction requires inert gas protection, waste of large amounts of monomer solution, and the growth of polymer chains. Poor control etc. The researchers used active metals such as Al, Zn, etc. to continuously reduce Cu(II) to Cu(I) in the presence of bipyridyl, using a “sandwich†structure polymerization device to achieve the polymerization of trace solutions, changing the shape and tilt angle of the metal A variety of gradient or textured polymer brushes can be prepared, and multiple polymer brushes can be grafted onto the same substrate in one simple step (Angew. Chem. Int. Ed. 2013). The article was highly praised by reviewers who thought that "This is a very innovative way to produce gradient polymer brushes on the macroscopic scale. Really nice work and surely of general significance for a broad readership. Publish as is!!" Hot and in-house articles by Angew. Chem. Int. Ed.
Using similar principles, the research group also developed a new method for photoinduced surface-initiated ATRP polymerization. TiO2 is an inorganic semiconductor material with excellent properties. It can generate electrons and holes when irradiated with ultraviolet light. The research team uses the excited electrons to reduce the stable Cu(II)/L in air to Cu(I)/L. Further catalyzed radical polymerization to achieve graft polymerization of various monomers and controllable preparation of polymer brushes, and to achieve autocatalytic in situ surface-initiated polymerization on the surface of TiO2 nanowires and nanotubes. This work was published in ACS Macro Lett. (2013, 2, 592-596), one of the top five papers that the magazine read the most in July.
The use of surface-initiated polymerization to prepare brushed soft material interfaces with controllable structure and composition has important research value in the fields of lubrication, antifouling, and surface property control.
The above research work was supported by the National Outstanding Youth Fund and General Program (21125316, 51171202), the key deployment project of the Chinese Academy of Sciences (KJZD-EW-M01) and the Ministry of Science and Technology “973†project (2013CB632300).
Particle Board is mainly used for furniture and carriage of bus, train.The bace&back are the Veneer surface, such as Okoume, Bintangor, Pine, Birch, Poplar, Pencil cedar, Maple, Cherry, White Oak, Sapele, Beech, Red Oak, Ash etc.Melamine paper is the most popular to be as the face board, it is abrasion resistant, heat resistant, fouling resistant, clean is simple.The Engineering wood is also as the face and back surface. It is more cheaper and beautiful, can reach the same wood grain effect as the veneer surface.And we have High Quality Particle board.LULI Group Co. Ltd, well known as the leading manufacturer for wooden, steel and paper products, located in Shouguang, Weifang, Shandong, China. Since the foundation in 1985, it focus on the production of Plywood , venner, MDF, particle board, Door skin , Blockboard , Finger joint board, OSB, paper, Steel etc.
Particle board Details:
size:1220*2440MM 1250*2000MM 1525*2440MM 1830*2440MM
THICKNESS:9MM-40MM
MATERIAL:POPLAR, COMBINE, PINE
GLUE:E0, E1, E2
CERTIFICATION:CARB, FSC, CE
Particle board
Particle Board,Melamine Particle Board,Particle Board Price,Melamine Laminated Particle Board
Luli Group Co.,Ltd. , http://www.plywoods.nl