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Method for preparing wide wave reflective film by using polymer stabilized cholesteric phase liquid crystal material

InactiveCN101706625AControl the degree of swellingTo achieve the purpose of broadband reflectionNon-linear opticsOrganic solventMass ratio
The invention belongs to the field of application of liquid crystal materials, and provides a method for preparing a wide wave reflective film by using a polymer stabilized cholesteric phase liquid crystal material. The polymer stabilized cholesteric phase liquid crystal material can be widely used in the fields of light enhancement films of liquid crystal displays, energy-saving glass sticking films and the like. The method comprises a process that the wide wave reflective film is prepared by evenly mixing a non-photopolymerisable nematic phase micro-molecule liquid crystal, a photopolymerisable nematic phase liquid crystal monomer, a chiral compound and a photoinitiator in a certain mass ratio; and a polymer network is formed through ultraviolet radiation. In the method, a liquid crystal box is soaked in organic solvent to extract the unreacted micro-molecule liquid crystal so as to obtain a pure polymer network; a coarse-pitch cholesteric phase liquid crystal is injected into the system; and ultraviolet polymerization is performed again to fix the swelling process of the polymer network so as to form the polymer stabilized cholesteric phase liquid crystal material with wide wave reflection. The method has the advantages that the material system and the manufacturing process are simple, the material source is extensive, and the reflected wave width and the reflection position of the system can be adjusted by changing the reflection positions of the polymer network and the injected cholesteric phase liquid crystal.
Owner:UNIV OF SCI & TECH BEIJING

Mobile-type laser processing device for on-line processing surface of steel rail

The invention discloses an online double-station mobile-type laser processing device for strengthening, toughening and repairing the surface of a steel rail by lasers. The online double-station mobile-type laser processing device particularly comprises a double-station mobile-type laser processing device, two sets of laser processing heads, two sets of laser beam motion actuating mechanisms, a control system and a laser guiding system. The mobile-type laser processing device of the invention has the advantages of small size and light weight, so the mobile-type laser processing device is suitable for manual transportation; by using the dedicated control system, the control is convenient; the operation can be conducted during the 'skylight' time for rail overhaul, particularly, the mobile-type laser processing device can simultaneously strengthen, toughen and repair various parts of the surfaces of linear steel rails, curved steel rails, guard rails, turnout junction and other double rails, more particularly, the rails are subjected to laser phase-change quenching, laser surface-melting quenching, laser cladding, laser alloying, laser texturing, laser shock processing and other treatment, thus greatly increasing the abrasion resistance of the strengthened steel rails. The online double-station mobile-type laser processing device has the characteristics of high processing efficiency, high portability, high processing accuracy and easy control.
Owner:WUHAN HIVALUE INTELASER LTD
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