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3 results about "Plasma polymerization" patented technology

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Plasma polymerization (or glow discharge polymerization) uses plasma sources to generate a gas discharge that provides energy to activate or fragment gaseous or liquid monomer, often containing a vinyl group, in order to initiate polymerization. Polymers formed from this technique are generally highly branched and highly cross-linked, and adhere to solid surfaces well. The biggest advantage to this process is that polymers can be directly attached to a desired surface while the chains are growing, which reduces steps necessary for other coating processes such as grafting. This is very useful for pinhole-free coatings of 100 picometers to 1 micrometre thickness with solvent insoluble polymers.

Bonding method, bonded body, droplet ejection head, and droplet ejection apparatus

InactiveUS20100193120A1Lamination ancillary operationsAdhesive processes with surface pretreatmentPlasma polymerizationMaterials science

A bonding method of manufacturing a bonded body is provided. The bonding method comprises: after providing a first object on which a first plasma polymerization film is formed on a first base member, and the first plasma polymerization film having a surface, selectively applying an energy to a part of a predetermined region of the surface of the first plasma polymerization film to activate the part of the predetermined region of the surface of the plasma polymerization film; after providing a second object having a surface; and bonding the surface of the second object and the surface of the activated first plasma polymerization film so that the surface of the first plasma polymerization film is partially bonded to the surface of the second object at the part of the predetermined region to obtain the bonded body.

Bonding method, bonded body, droplet ejection head, and droplet ejection apparatus

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Owner:SEIKO EPSON CORP

Plasma preparation method of polystyrene fluorescent microspheres and reaction equipment of plasma preparation method

ActiveCN105713126ALong fluorescence lifetimeImprove thermal stabilityLuminescent compositionsOrganic synthesisPolystyrene

The invention discloses a plasma preparation method of polystyrene fluorescent microspheres and reaction equipment of the plasma preparation method, and relates to the technical field of organic synthesis of fluorescent microspheres. A rare earth organic complex is adopted as a starting raw material, plasma of polystyrene is polymerized on the surface of the rare earth organic complex to coat the surface of the rare earth organic complex with a layer of polystyrene, and thus polystyrene fluorescent microspheres are formed. The method includes the main steps of 1, performing plasma pretreatment of the rare earth organic complex; 2, performing plasma polymerization, wherein plasma of polystyrene monomers is polymerized and deposited on the surface of the rare earth organic complex. The polystyrene fluorescent microspheres obtained through the preparation method have a long fluorescent lifetime and good heat stability, and the preparation process is simple, easy to perform and free of environmental pollution.

Owner:HEBEI NATAI CHEM IND CO LTD

Preparation method of polyacrylamide reverse-phase emulsion

InactiveCN107226875AImprove securityLess heat of polymerizationPolymer scienceEmulsion

The invention belongs to the field of water-soluble high molecular materials, and in particular relates to a method for industrially preparing polyacrylamide reverse-phase emulsion. A polyacrylamide reverse-phase emulsion product is obtained by adopting a multi-step polymerization step. The method comprises the following steps: step 1, by taking acrylamide and acrylic acid or 2-acrylamido-2-methylpropanesulfonic acid as a polymerization monomer and taking Span and octylphenol polyoxyethylene ether (OP) as an emulsifier, carrying out a small amount of polymerization to prepare the polyacrylamide reverse-phase emulsion, wherein polymerization heat is less so as to ensure that implosion dangers, caused by the fact that heat is not dissipated in time, do not occur in a polymerization process; step 2, polymerizing: carrying out further polymerization on the basis of the polymerization in the step 1, wherein partial polymerization is carried out, so that polymerization heat generated by the polymerization in step 2 is greatly reduced, an implosion phenomenon does not occur, and gel or emulsion breaking is not generated in the polymerization process. In a subsequent polymerization process, the released amount is determined according to the size of a polymerization kettle and heat releasing efficiency when one part of product is released each time. By adopting the method provided by the invention, the safety of polymerization reaction is greatly improved, the large-size polymerization kettle can be utilized, and the implosion possibility does not need to be worried, so that industrial production can be stably and safely carried out.

Owner:SHANDONG UNIV

3 results about "Plasma polymerization" patented technology

Bonding method, bonded body, droplet ejection head, and droplet ejection apparatus

Plasma preparation method of polystyrene fluorescent microspheres and reaction equipment of plasma preparation method

Preparation method of polyacrylamide reverse-phase emulsion

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