304results about How to "Easy to batch" patented technology

The invention specifically relates to a mixture containing fluororesin and a preparation method thereof, belonging to the field of communication materials. A prepreg prepared by impregnating a glass fabric in dispersion liquid of the mixture containing fluororesin and then carrying out drying and the like has uniform glue content, good impregnation quality, strong resin adhesion, smooth surface and appropriate toughness and viscosity. The invention also relates to a high-frequency copper clad laminate prepared from the prepreg, or a film or copper foil made of the mixture containing fluororesin. The prepared copper clad laminate has good thermal-mechanical properties, excellent dielectric properties and high copper foil strength, and can meet requirements on the comprehensive properties of substrate materials in the field of high-frequency communication. According to the invention, the processing properties of traditional fluororesin are greatly improved by using fluorine-containing resin with a low melting point; and a coupling agent is cooperatively used, so interaction between an inorganic filling material and glass fabric and a resin matrix is improved, dispersibility of the inorganic filling material, processing aids and the like in the fluororesin is enhanced, and the overall performance of the copper clad laminate is made more stable.

The invention discloses a method for preparing a graphene / MOF (metal-organic framework) porous composite material aquagel and a graphene / MOF porous composite material aerogel. The method comprises the following steps: taking a clean container, adding a graphene or graphene oxide dispersion solution into the container, adding MOFs crystal powder into the container until the mass ratio of the MOFs crystal powder to the graphene or graphene oxide is (1:100)-(100:1), sealing the container, and performing oscillation or stirring to promote the formation of a graphene or graphene oxide self-assembled three-dimensional framework structure and the uniform compounding between the MOFs crystals and graphene sheets or graphene oxide sheets, thereby obtaining the graphene / MOF porous composite material aquagel; and finally, performing freeze-drying to obtain the graphene / MOF porous composite material aerogel. The graphene / MOF porous composite material aerogel has a self-supporting porous structure, and maintains the structural integrity of the graphene or graphene oxide and MOFs. The preparation method is mild in conditions and simple to operate, and can effectively prevent the graphene sheets or graphene oxide sheets and the MOFs crystals from aggregation.

The invention provides a method for preparing a polymer micro lens array, and relates to the field of micro mechanical machining. The problems that in an existing hot press molding method, the cycle is long, cost is high, efficiency is low, and the dimensional precision and the shape of micro lenses can not be guaranteed easily are solved. The method comprises the steps that a graphical photoresist mask is formed on the surface of a silicon substrate; a microporous array is etched through a dry method; the microporous array is evenly covered with a dimethyl silicone polymer thin film, the microporous array is in sealing connection with a cavity, the pressure of a cavity is adjusted to change the ball coronary deformation of the dimethyl silicone polymer thin film, and the pressure is kept constant; photosensitive gel is poured on the dimethyl silicone polymer thin film, and a photosensitive gel convex mold is obtained through ultraviolet curing demolding; a mixture of dimethyl silicone polymer prepolymer and a curing agent is poured in the photosensitive gel convex mold to be heated and cured to obtain a dimethyl silicone polymer concave mold; the concave mold is used for conducting hot pressing on carbonic ester base materials, and a carbonic ester base micro lens array is obtained after demolding. The method for preparing the polymer micro lens array is easy to operate, high in efficiency, low in cost, small in error, good in repeatability, lossless in demolding and suitable for mass production.

The invention belongs to the technical field of a heat conduction polymer composite material, and particularly relates to an epoxy composite material with high heat conductivity and a preparation method thereof. Firstly, electronegative graphene oxide nanosheets or boron nitride nanosheets are repeatedly deposited on the surface of commercial melamine sponge through layer-by-layer self assembly; a composite sponge framework with a three-dimensional filling network is formed; then, the composite sponge is subjected to epoxy resin encapsulation; the final heat conduction composite material is obtained. The materials can build and form a three-dimensional heat conduction network under the condition of extremely low filling adding quantity; when the boron nitride content is 1.7 weight percent and the graphene content is 0.74 weight percent, the heat conductivity in the vertical surface of the materials respectively reaches 0.62 W / Mk and 0.73 W / Mk. The method has the advantages that the operation is simple; the production cost is very low; the batch and scale production is easily realized; wide application prospects are realized.

The invention discloses a processing technology of chilli oil bamboo shoot and relates to a food processing technology, wherein the processing technology comprises the following steps: processing raw materials, bleaching, preparing ingredients and spicing, wherein the step of preparing ingredients comprises preparation of the chilli oil ingredients and brine. Another pot is selected after the spicing, the chilli oil ingredients of appropriate amount is poured into the pot, the spiced bamboo shoots are into the pot, and the mixture is fried for 5 to 10 minutes to obtain the finish product. The processing technology of chilli oil bamboo shoots has a uniform salt deduction effect, can save water and can make uniform salinity. The formula is regulated based on a lot of experiments and according to tastes, is beneficial to process and mass production, ensures a stable and uniform taste, has a relatively popular taste, is adaptable to consumer demands and has good practicability.

The invention discloses a processing technology of bamboo shoots with pickled peppers, and relates to a food processing technology. The processing technology comprises the concrete steps of processing materials, boiling, distributing and pickling, wherein in the distributing step, mountain pepper water is prepared; and the preparation method comprises the steps of strictly putting various materials into a pot according to the ratio; and evenly stirring for 3-5 minutes to take out from the pot. According to the processing technology, the fading effect is even, and consistent in salinity control; water consumption is saved; the ratio of pickling liquid to fed materials is strictly controlled; the pickling temperature and the pickling time are controlled; the streamline operation is carried out; consistent mouthfeel of the product is ensured; the processing technology has good practicability.

The invention discloses a terahertz artificial birefringence device based on a periodic chirped grating. According to the terahertz artificial birefringence device, an artificial birefringence effect is formed through etching a submillimeter-scale relief grating structure on the surface of a high-resistance silicon chip, thereby realizing functions of terahertz wave phase shift and polarization state transition. According to the device, a specific period chirped structure is adopted. Not only is periodicity of the grating kept, but also the chirped structure is introduced. Compared with a common periodic grating, the terahertz artificial birefringence device is advantageous in that the birefringence coefficient and the birefringence bandwidth of the device are improved; a high birefringence coefficient which is larger than 0.35, broadband birefringence flatness and a good linear phase shift characteristic are realized in a terahertz waveband; a highest phase shift coefficient reaches deltaphi=1.6pi; and polarization conversion rate exceeds 99% when the terahertz artificial birefringence device is used as a one-half wave plate. Compared with a metal grating and a metal hypersurface structure, the terahertz artificial birefringence device is made of a full dielectric material and greatly improves transmittance of the device; low loss and broad band are realized; and the terahertz artificial birefringence device can be widely used for regulating terahertz wave phase and polarization.

The invention discloses a mutual shielding type electric field sensor based on torsional vibration. The mutual shielding type electric field sensor comprises a substrate, an electric field sensing structure, torsional elastic beams connected with movable torsional electrodes and a driving structure, wherein the electric field sensing structure comprises at least one group of fixed electrodes and movable torsional electrodes, the fixed electrodes and the movable torsional electrodes are sensing electrodes and are mutual shielding electrodes, namely the fixed electrodes and the movable torsionalelectrodes produce relative movements and are mutually shielded when the movable torsional electrodes perform torsional vibration, and meanwhile the fixed electrodes and the movable torsional electrodes produce sensing charge change. The driving structure drives the movable torsional electrodes to perform torsional vibration around the torsional elastic beams, so that relative position change isproduced between the fixed electrodes and the movable torsional electrodes. The electric field sensor is simple in structure, small in size, high in sensing efficiency, wide in use range, suitable forcommon machining and micromachining technology preparation, easy to assemble and integrate and suitable for batched-type and large-scale production.

The invention belongs to the technical field of membranes, and particularly relates to a SiO2@sPS-modified polymer hybrid proton exchange membrane and a preparation method thereof. The proton conductivity of the SiO2@sPS-modified polymer hybrid proton exchange membrane prepared by uniformly dispersing SiO2@sPS in a polymer matrix is greatly higher than that of the pore polymer proton exchange membrane. Besides, the silicon sphere kernel is etched to obtain the sulfonated hollow polystyrene (h-sPS) / polymer hybrid proton exchange membrane to further enhance the water retaining capacity of the hybrid proton exchange membrane, so that the proton conductivity of the h-sPS / polymer hybrid proton exchange membrane is further enhanced; and meanwhile, the fuel permeability of the hybrid proton exchange membrane is further inhibited. Therefore, the h-sPS / polymer hybrid proton exchange membrane has higher selectivity. The method has the advantages of simple operational process, mild preparation conditions and lower production cost, can easily implement mass large-scale production, and has wide application prospects.