71results about How to "Barrier" patented technology

The invention provides a high-block degradable membrane product and its manufacturing method, in particular, a degradable membrane using carbon dioxide resin as a barrier material. The high-block degradable membrane of the invention comprises a layer structure having at least two outer layers and a barrier layer, the barrier layer is nanometer polymers or degradable nanometer polymers; the outer layers are polyolefin or degradable polyolefin. The high-block degradable membrane of the invention has good transparency, gas barrier property, heat sealing property, printing ability, solves a problem that a current domestic and foreign dry type composite or coextruded plastic food membrane bag have no environmental protection characteristics, satisfies characteristic request of generally used thermoduric cooking food packing membranes and bags, is capable of being degraded to small molecule materials under action of light and / or organism, is a high performance environmental protection product.

The invention discloses PVC / PE / PVCD solid medicine using composite hard sheet manufacturing technology. It includes the following steps: unreeling for PVC basis material; corona treatment for its surface; coating adhesive; drying; unreeling for PE film; compositing the PVE basis material and PE film; solidifying; dying; corona treatment for the PE film surface; coating adhesive; coating PVCD glue; drying to form PVCD film; repeating coating the PVCD glue on the PE film; drying; rolling, solidifying to form PVCD film again; patting cut and detecting.

A nanometre-class polymer / laminated inorganic substance composite material features that it is prepared by use of the millstone-shaped force chemical reactor, which has a unique 3-D shear structure to provide strong squeeze-shear force field for grinding inserting, dispersing, and mixing to prepare the polymer / laminated inorganic substance composite powder, and then the said nanometre-class composite material is prepared by the universal processing method.

The invention discloses a PET / PP alloy material and a preparation method thereof. The invention discloses a PET / PP alloy material, which is prepared from the following components according to the mass percentage proportions: 20-50% of PET, 20-50% of PP, 3-8% of compatibilizer, 10-30% of reinforcing agent, 15-20% of composite fire retardant, 0.5-2% of lubricant, and 0.1-1% of anti-oxidant. The beneficial effects reside in that: the PET / PP blending alloy material provided by the invention has both advantages of PET and PP, has excellent comprehensive properties; simultaneously, proper amounts of reinforcing agent and composite fire retardant are added, in order to effectively improve mechanical properties and flame retardation performance of the PET / PP alloy material, and make the PET / PP blending alloy material have advantages of high notch impact strength, excellent bendability, and good flame retardation effect; and the PET / PP blending alloy material is widely applied in the fields of automobile, household electrical appliance, toy and machinery, and has a wide application prospect.

The invention discloses a phase change type reflective thermal insulation coating and a preparation method thereof. According to the specific implementation scheme, the invention provides a phase change type reflective thermal insulation coating, emulsion, water, titanium dioxide, phase change microcapsules (MicroPCMs), thermal insulation powder, coarse whiting powder, kaoline and aids are taken as main ingredients, and the coating comprises the following components in percentage by mass: 25-45 percent of emulsion, 5-15 percent of water, 5-10 percent of titanium dioxide, 3-5 percent of MicroPCMs, 5-10 percent of thermal insulation powder, 5-15 percent of coarse whiting powder, 5-8 percent of kaoline, 5-8 percent of talcum powder, 2-3 percent of propylene glycol and 1.5-6 percent of aids. The phase change type reflective thermal insulation coating and the preparation method thereof disclosed by the invention have the beneficial effects that compared with an existing thermal insulation coating, the phase change type reflective thermal insulation coating disclosed by the invention has the advantages that 1, phase change microcapsules (MicroPCMs) materials are fused, so that the temperature difference between day and night in coating application is reduced, and a phenomenon that the thermal insulation property of the coating is reduced due to extremely large surface temperature difference is avoided; and 2, the three adopted modes such as surface heat reflection, internal heat absorption and heat barrier are combined, the thermal insulation efficiency is improved, and the thermal insulation effect is improved by over 50 percent compared with that of a common thermal insulation coating under the same thickness.

The invention discloses a starch-containing biodegradable barrier thin film, as well as a preparation method and application thereof. The biodegradable barrier thin film is prepared from 0-80% of biodegradable homopolyester, 0-80% of biodegradable copolyester, 1-30% of aliphatic polycarbonate, 5-60% of starch and 2-30% of polylol. The biodegradable barrier thin film disclosed by the invention is formed by mixing the biodegradable homopolyester with higher biodegradation speed, the biodegradable copolyester with better processing performance and the aliphatic polycarbonate with good barrier property according to different proportions, and the thin film prepared from an obtained composition has biodegradability and barrier property, and can be widely applied to the packaging field, in particular to the food and medicine packaging field.

The invention relates to a preparation method of a microcapsule fire retardant, and belongs to the technical field of fire retardant. According to the preparation method, magnesium hydroxide, ammoniumpolyphosphate, and melamine phosphate are mixed for coating of zeolite molecular sieve, wherein melamine phosphate is capable of achieving flame resistance at a condensed phase and a gas phase, a large amount of latent heat is absorbed through sublimation, volatilization, and evaporation, inert gas is generated, and gas state substances such as MA steam, water vapor, N2, CO2, and NH4 are generated, the concentrations of oxygen and combustible gas at a combustion zone are reduced through dilution, and at the same time, coating of material surface is realized; charing is promoted, formation ofmolten drops from some polymers is promoted, so that a part heat energy is taken away, and combustion reaction is terminated; the zeolite molecular sieve is a crystal aluminosilicate formed by SiO4 and Al2O3 tetrahedrons through oxygen bridges; not only uniform pore structures, and large specific surface area, but also extremely high surface polarity is achieved. The zeolite molecular sieve possesses excellent absorption effect and certain catalyst effect, and flame resistance of the microcapsule fire retardant is improved.

The invention discloses a production of nanometer degradable high-obstruct packaging film and the method for preparation, specifically a degradable complex film prepared with degradable nanometer polymer as the obstruct material. Said complex film has a layer structure containing at least two outer layers and one interlayer, at least one layer among which is the obstruct layer, the obstruct layer being made up of degradable nanometer polymer, and others being made up of degradable polyolefin or polyolefin. The high-obstruct degradable film is transparent and has obstruct to oxygen and aqueous vapor. Modified by nanometer inorganic material, it can prepare 3- 7 layer film, which has high obstruct and makes the article packaged have long shelf retention period and can be degraded after one or two years, and has the same effect with dry complex and coextrusion complex film.

The invention discloses glycine-modified graphene oxide, a polyvinyl alcohol halogen-free flame-retarding material and a preparation method thereof. The glycine-modified graphene oxide is prepared through the following steps: 1) adding the graphene oxide to water with ultrasonic dispersion to prepare a graphene oxide dispersed liquid; and 2) performing a reaction to a glycine solution and the graphene oxide dispersed liquid at 90-95 DEG C for 8-12 h, and separating and drying a reaction product, wherein the mass ratio of the glycine to the graphene oxide is 1-5:1. The glycine is grafted to the lamella of the graphene oxide, on the other hand, the graphene oxide lamella has certain air insulation and flame-retarding property, and on the other hand, an electronegative carboxyl group can be used for targeted induction of MgAl-LDH lamella, thereby uniformly dispersing the MgAl-LDH. The method achieves a cooperative flame-retarding effect between graphene and the MgAl-LDH and improves the flame-retarding effect of a PVA substrate.

The invention discloses a nanometer silicon dioxide modified epoxy resin coating. The nanometer silicon dioxide modified epoxy resin coating comprises the following raw materials by weight: 55 to 70 parts of epoxy resin, 8 to 15 parts of chlorinated rubber, 5 to 18 parts of silicone resin, 9 to 15 parts of alkyd resin, 1 to 3 parts of graphene oxide, 3 to 8 parts of nanometer silicon dioxide, 2 to8 parts of charcoal powder, 1 to 3 parts of silicon carbide, 0.3 to 1.8 parts of nanometer titanium black, 2 to 6 parts of precipitated barium sulfate, 0.7 to 3 parts of bamboo fiber, 3 to 9 parts ofbasalt flakes, 2 to 8 parts of nanometer aluminium oxide, 9 to 25 parts of a curing agent, 0.1 to 1 part of 1-pyrenebutyric acid, 20 to 30 parts of a solvent and 0.2 to 1.5 parts of an auxiliary agent, wherein the curing agent is a mixture of n-butyl trimellitate anhydride, 2-ethyl-4-methyl imidazole, zinc acrylate and a boron-amine curing agent 594. The nanometer silicon dioxide modified epoxy resin coating provided by the invention has high strength, good heat resistance and wear resistance and excellent corrosion resistance.

The invention relates to a heatproof anticorrosion coating with the ion barrier ability and selectivity, a preparation method thereof, a purpose of the heatproof anticorrosion coating in metal materials, especially steel materials, and corresponding anticorrosion processing methods of the metal materials. The anticorrosion coating of the invention comprises an anionic selectivity layer and a cationic selectivity layer, wherein the anionic selectivity layer and the cationic selectivity layer are films comprising a matrix material and a layered inorganic material intercalation, the Zeta potential of the layered inorganic material is from -50mV to 50mV, and the matrix material is an anticorrosion polymer which is an epoxy resin, a phenolic resin, acrylic resin or a polyamide polymeric material. The anticorrosion coating of the invention, which can be applied to steel materials in a high chloride ion content corrosion environment, underground pipelines, sea platforms, seabed pipelines, steamships and the like, has a good anticorrosion performance.

The invention provides a preparation method for an aerated concrete block, belonging to the field of building materials. According to the invention, high-temperature-resistant polypropylene fibers arereasonably used, so the segregation of aggregate is effectively hindered, the formation of settlement cracks is prevented, and the crack resistance of the aerated concrete block is greatly improved;the dehydration catalyst ammonium polyphosphate in the invention is decomposed with heat to produce an acidic substance, a hydroxyl group on the charring agent melamine is dehydrated and carbonized toform a non-flammable three-dimensional carbonaceous layer, and a porous sponge-like foam carbonaceous layer is finally formed under the framework action of the carbonaceous layer, so the prepared aerated concrete block has light weight and good thermal insulation performance; and since graphene oxide has barrier action on gas molecules, smog and solid particles, when the graphene oxide is uniformly dispersed in a permeable polymer matrix, the smoke production capacity of the aerated concrete block is significantly reduced.

The invention provides Portland cement. The Portland cement is prepared from the following raw materials in parts by weight: 50-60 parts of Portland cement, 15-25 parts of polyurethane composite cyclodextrin modified grafted bentonite, 10-20 parts of a synergistic auxiliary agent, 5-15 parts of dispersed polyaniline and 1-6 parts of a surfactant lauryl sodium sulfate. According to the preparation method disclosed by the invention, the bentonite is firstly calcined, lamellas of the bentonite are expanded, interlayer spacing is increased, the bentonite is used for dispersing raw materials, and compared with shrinkage and dispersion in the prior art, the dispersity of the polyurethane composite cyclodextrin modified grafted bentonite in the raw materials can be improved; and the bentonite adopts an acrylic emulsion and a silane coupling agent KH560, and then an initiator is added for polymerization.

The invention discloses a weather-resistant degradable plastic bottle and a preparation method thereof. The weather-resistant degradable plastic bottle contains the following components in parts by weight: 50-70 parts of polylactic acid, 15-25 parts of attapulgite / polymethyl methacrylate hybrid particles, 1-5 parts of nano-titanium dioxide, 1-5 parts of nano-zinc oxide, 5-10 parts of glass fibers,0.01-1 part of a plasticizer and 0.05-1.2 parts of a compatibilizer. The plastic bottle prepared by virtue of the preparation method is environment-friendly and degradable, can be applied outdoors and can resist weather, and modified attapulgite-grafted polymethyl methacrylate is introduced, so that the mechanical property and weather resistance of polylactic acid are improved; and meanwhile, byadding nanoparticles, the plastic bottle has the excellent ultraviolet-resistant, sterilization and anti-pollution characteristics.

The invention discloses an aspergillus flavus infection resistance method for xanthan gum composite membrane covered peanuts, comprising the following steps of adding peanut shell powder into a citric acid solution, conducting microwave extraction, leaching and concentrating the solution; adding absolute ethyl alcohol into the solution; standing, centrifuging, precipitating, freezing and drying; smashing to obtain peanut water-soluble dietary fiber; adding the peanut water-soluble dietary fiber into distilled water, and mixing uniformly; adding the xanthan gum under a stirring condition; removing bubble in vacuum to obtain xanthan gum water-soluble dietary fiber composite membrane coating materials; coating the coating materials on peanuts; packaging the peanuts; and storing the peanut at a normal temperature. The xanthan gum composite membrane covered peanuts prepared by the method can resist the aspergillus flavus infection, restrains the growth of the aspergillus flavus, prevents the peanut fat from being oxidized and is stored for a long term and suitable for industrial production.

The invention discloses a preparation process of aqueous silvery vacuum aluminized paper and a transfer coating used for the preparation process. The transfer coating is uniformly coated on a transfer transparent base film to form a uniform and compact transfer coating and then a continuous bright metal aluminum layer is plated to form a transfer film; the transfer film is adhered to bottom paper by using a transfer adhesive; the base film is separated from the paper sheet, so that only the transfer adhesive, the aluminum layer and the coating are remained on the surface of the paper sheet; the stripped base film can be newly coated and reutilized; the transfer coating consists of aqueous acrylic resin emulsion, matting paste, de-ionized water and absolute ethanol; and the mass ratio of the aqueous acrylic resin emulsion to the matting paste to the de-ionized water is 9-11:1.0-1.5:0.4-0.6. The process has higher temperature resistance level, and also has the characteristics of good viscous resistance, water resistance and leveling property. The aqueous transfer coating has the characteristics of no toxicity, no smell, transparency, stability, environmental friendliness and safety, the cost can be effectively saved, and the displacement of VOC (Volatile Organic Compounds) can be greatly reduced.

The invention discloses an anti-color-infiltration red oak two-component aqueous woodware coating structure, which sequentially comprises a two-component aqueous woodware sealing primer coating, a two-component aqueous woodware burnishing primer coating and a two-component aqueous woodware topcoat coating on a red oak substrate surface, wherein the two-component aqueous woodware sealing primer, the two-component aqueous woodware burnishing primer and the two-component aqueous woodware topcoat respectively comprise a main agent, a curing agent and water. According to the present invention, eachlayer of the structure comprises the two components of the acrylic acid dispersion containing the OH functional group and the aqueous curing agent containing the NCO functional group, wherein the densely-cross-linked structure of the two-component system can barrier and block the pigment tannic acid of the red oak substrate, such that the problem that the infiltration of the tannic acid in red oak can cause the discoloration of the paint coating film can be solved; and the sealing primer coating and the burnishing primer coating have characteristics of strong adhesion and easy burnishing, andthe topcoat coating has characteristics of good smoothness, good flatness, scratch resistance, good paint film hardness and excellent stain resistance.

The invention relates to a preparation method of high-barrier-performance vinylidene chloride and acrylonitrile copolymer latex. The preparation method is characterized in that the raw material adopted in the preparation method comprises the following components in parts by weight: 90 to 96 parts of vinylidene chloride monomer, 3 to 5 parts of acrylonitrile monomer, 1 to 2 parts of acrylic acid functional monomer, 0.4 to 3 parts of compound emulsifier, 0.05 to 0.3 part of pH (Potential of Hydrogen) modifier, 0.05 to 0.5 part of initiator, 5 to 35 parts of seed latex, 0 to 3.0 parts of stabilizer, 0 to 3.0 parts of antioxidant, and 100 parts of water. The lax shows white color for a long term, cannot be yellowed after being coated, and has high stability; the prepared latex can be directly coated on the surfaces of substrates such as PP (Polypropylene) hard sheets, PET (Polyethylene Terephthalate) hard sheets and PVDC (Polyvinyl Dichloride) hard sheets; a film formed by coating the latex or formed through the coated and dried latex has barrier performance, moisture resistance, fragrance holding performance, resistance to chemical medicines, flame resistance, etc.; and the coated film is transparent and not yellowed for a long time.

The presesnt invention relates to perovskite transparent photovoltaic glass and the preparation method thereof, a wide bandgap perovskite material is adopted as a light absorption layer, ultraviolet light can be absorbed for power generation, meanwhile, visible light can penetrate through the perovskite transparent photovoltaic glass, and the light transmission of the glass is not affected. The absorption layer of the photovoltaic cell is wide bandgap perovskite which is prepared by a two-step deposition method and contains Cl and Br, and the transparent electrode is an ultrathin metal or transparent conductive oxide film. The method is simple in process and easy to operate, the visible light region transmittance of the obtained photovoltaic cell is larger than 60%, the photoelectric conversion efficiency is larger than 1%, and the method is expected to be applied to building curtain walls and car windows. The transparent photovoltaic cell can also be integrated with an electrochromic device to form self-powered intelligent photochromic glass which is expected to be applied to the fields of flight goggles, intelligent windows and the like. The transparent photovoltaic cell can be laminated with a common solar cell panel to reduce the damage of ultraviolet rays, improve the photoelectric conversion efficiency and improve the stability of the cell.

The invention relates to high-temperature-resistant flame-retardant nylon and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the method, traditional nylon 6 or nylon 66 is modified, 1-5% of a cross-linking agent of a polyfunctional monomer, 1%-8% of a heat stabilizer, 5-25% of a flame retardant and 1-8% of EVA particles are added into a preparation formula for melt blending extrusion, then a cobalt source or an electron accelerator is used for irradiation treatment, and the irradiation dose is 10-200 kGy. Compared with the traditional nylon 6 / nylon 66, the cross-linked nylon 6 / nylon 66 prepared by the invention has the advantages that the temperature resistance and the flame retardance are improved, the flame retardance can reach the V0 level, the high temperature of 280 DEG C or above can be continuously resisted, and meanwhile, the stability and the ductility are good.

The invention discloses a pest preventing strip coil suitable for fruit trees. The pest preventing strip coil comprises a coiling drum and a pest preventing strip. The pest preventing strip is composed of a flat-sheet-shaped elastic rubber strip, a yarn braiding layer, a pest sticking glue layer with pesticides and release paper. The pest preventing strip is coiled at the outer diameter end of the coiling drum in the length direction to be of a coil-shaped structure. The yarn braiding layer is braided on the flat-sheet-shaped elastic rubber strip in the length direction to form an integral structure. The pest sticking glue layer is arranged on the whole surface of the yarn braiding layer in the length direction in a coated mode. The release paper is stuck to the lower end of the pest sticking glue layer in the length direction. The length of the pest preventing strip is not limited, and the width of the pest preventing strip ranges from 0.5 cm to 8 cm. The pest preventing strip is taken down from the coiling drum, wound around the base portion of a trunk by one to two circles, properly tensioned and sheared through scissors, and then the head end and the tail end of the pest preventing strip are stuck together. By means of the pest preventing strip coil, operation is easy, the working efficiency is obviously improved, the physical barrier action and the pesticide toxic action are achieved on fruit tree pests such as cicadas, inchworms and snails at the same time, and the preventing and treating effect is remarkably improved.

The invention relates to the technical field of composite material manufacturing, in particular to a rubbing-resistant flexible composite material, wherein a flexible anti-aging layer, a bonding layer, a barrier layer, a bonding layer, a buffer layer, a bonding layer, a force bearing layer, a bonding layer and a heat sealing layer are sequentially arranged from outside to inside; the anti-aging layer and the barrier layer, the barrier layer and the buffer layer, the force bearing layer and the heat sealing layer are respectively bonded with a bonding layer, and the layers are compounded through laminating compounding into an integrated material; both the buffer layer and the heat sealing layer are made of thermoplastic polyurethane films, and are bonded with the force bearing layer and thebarrier layer by using a polyurethane adhesive, the thickness is 12-25 microns, certain barrier performance is achieved, meanwhile, rubbing of external force on the barrier layer and the anti-aging layer can be buffered through the self flexibility, a capsule material is protected, and penetrating pinholes do not appear after the capsule material is rubbed for 300 times.

The invention discloses an oil-stain-resistant ceramic sheet, which is prepared from the following raw materials in parts by weight: 20 to 30 parts of mullite, 10 to 20 parts of cordierite, 5 to 10 parts of talcum powder, 4 to 6 parts of fiber-reinforced graphene, 2 to 6 parts of wollastonite hybrid modified alpha-aluminum oxide, 1 to 3 parts of silicon nitride composite nano powder and 1 to 5 parts of barium carbonate sintering aids. The oil-stain-resistant ceramic sheet is composed of mullite, cordierite, talcum powder and other raw materials, and the prepared product is resistant to oil stain and excellent in strength performance through the composite proportion of fiber-reinforced graphene, wollastonite hybrid modified alpha-aluminum oxide and silicon nitride composite nano powder.

The invention discloses a composite filter rod with an embedded mixed material section. The composite filter rod is formed by arranging, combining and processing an ordinary filter section, the embedded material section and an ordinary filter section according to a certain ratio. The embedded material section consists of a transparent outer coating layer and multiple small particles positioned inthe outer coating layer; the surface morphology of each of the small particles is loose and porous, and each of the small particles is a color particle or a mixture of multiple color particles; a capsule can be embedded in each of the small particles and consists of a wall material and core liquid. When a cigarette made by the composite filter rod disclosed by the invention is smoked, fingers cancrush the capsules, and the core liquid infiltrates the small particles, so that the smoke aroma and the abilities of adsorption and damage reduction of smoke are increased.

The invention relates to a stop valve. The stop valve comprises a valve body, and the upper top of the valve body is connected with a liquid inlet; a liquid outlet is formed opposite to the liquid inlet, and the top ends of the liquid inlet and the liquid outlet are provided with reinforcing plates; the reinforcing plates are provided with installing holes; the communicating position of the liquidinlet and the liquid outlet is provided with a buffering plate which is provided with small holes; the small holes are connected with a filter screen; the upper side of the liquid inlet is connectedwith a hole frame which is provided with a communicating hole; the communicating hole is provided with a silencer; the top of the hole frame is connected with a flexible graphite sealing ring which isconnected with a filler cavity; the lower end of the filler cavity is connected with a plunger; a sealing ring is arranged at the bottom of the plunger and is connected with a buffering device; the upper end of the filler cavity is connected with a valve rod, a spacer is used for isolation, and the two ends of the bottom of the valve rod are provided with limiting pins; a column nut is used for fixing, and the upper side of the valve rod is connected with an inlet of a valve deck; an abrasion-resistant plate is welded to the inlet of the valve deck and is provided with an O-shaped sealing ring; and the abrasion-resistant plate is connected with a cap nut. The stop valve is good in sealing performance, high in anti-impacting force, good in buffering performance, high in stability, resistant to abrasion, corrosion-proof and resistant to high temperature, and long in service life.

The invention discloses a transparent ultrahigh-barrier composite film and a preparation method thereof. A base material layer is prepared by combining a multi-layer co-extrusion process with corona treatment, and then evaporation enhanced coating, inorganic oxide evaporation and surface coating of a protective layer are carried out, so that the ultrahigh-barrier composite film is prepared. The ultrahigh-barrier composite film is sequentially provided with a coating protection layer, an inorganic oxide evaporation barrier layer, an evaporation enhancement layer and a base material layer; wherein the base material layer is a multi-layer co-extrusion biaxially oriented polyamide film and is sequentially provided with an upper surface layer, a first secondary surface layer, a middle layer, asecond secondary surface layer and a lower surface layer; the upper surface layer is a biaxially oriented polyamide film layer subjected to corona treatment and is compounded with the evaporation enhancement layer; the middle layer is an EVOH layer; and the lower surface layer is an anti-blocking smooth layer. The ultrahigh-barrier composite film is transparent, can be boiled in water and heated by microwaves, has excellent barrier property and excellent odor barrier property on oxygen and water vapor, and is particularly suitable for various high-grade packaging fields.

The invention discloses a high-resistant and high-contractive film using polyvinyl alcohol as the middle layer and its making method. The structure of the film is 3-7 layers, and the three-layer structure is PO / PVA / PO, the five-layer structure is PO / glue / PVA / glue / PO, and the seven-layer structure is PO / glue / PA / PVA / PA / glue / PO or PO / glue / PVA / PVA / PVA / glue / PO. The invention adopts the high-molecular material and degraded PVA resin as the obstructing layer. The said PVA resin is the polyvinyl alcohol of the middle layer, PO is polyolefin resin, and PA is polyamide, the glue is the bond. The making method adopt a plurality of plasitification coextrusion machines to implement. Put the materials of each layer into the extrusion machine, pass through coextrusion head, upper cool winding, the draught, the heating and synchronous double-directional extension to get the product. The invention is suitable for the packaging films of various goods and can replace the PVD and ethylene-ethenol polymer.

The invention discloses a preparation method and a use method of a silk protein environment stimulation response actuator. Silk is treated in a low eutectic depth solvent to prepare filaments with micrometer scales and nano-scales, preparation conditions are controlled to generate new surface micro-topographies and structural change of the filaments, the filaments are further self-assembled into afilm device, and environments such as temperature and humidity and difference of gas in the environments on two sides of the device are controlled to achieve movement behaviors such as folding, bending and supporting by the aid of selective adsorption and permeation performance of the filaments. The actuator has a wide application prospect in the field of environmental response, artificial intelligence and the like.

The present invention discloses a method for improving taste of brown rice. The method uses the brown rice as a raw material. The method successively comprises the following steps: brown rice is washed and disinfected; after the disinfection treatment, sterile water is added into the brown rice for soaking; the soaked brown rice is drained, the drained brown rice is put still in a film coating solution, the coated brown rice is taken out to be air-dried, and the air-dried brown rice is loaded in dishes; the brown rice in the dishes are subjected to cycle freezing-thawing; and the obtained brown rice is dried to moisture content of 11-12.2%, the dried brown rice is soaked in the soybean protein film coating solution for second soaking and coating, the coated brown rice is air-dried, and theair-dried brown rice is vacuum-packaged. The method of soaking, film coating, repeated freezing-thawing and second film coating is used to improve the taste of the brown rice and increases shelf life.

The invention provides a high-strength high-barrier fresh-keeping plastic film used for vegetable and fruit packaging and a preparation method of the plastic film. The method comprises the following steps: performing ultrasonic dispersion on activated argil and surface-modified amphiphilic graphene oxide in a solvent to obtain a uniform dispersion liquid, coating the surface of a hyperbranched film substrate with the dispersion liquid, performing drying solidification to form a composite film, and finally coating the surface of the graphene oxide with a layer of SiO2 film through magnetron sputtering to obtain the high-barrier plastic film with a three-layer composite structure. The method provided by the invention overcomes the defects that bonding strength among composite layers in a current layer compounding technology is not high, the mechanical properties of the film substrate are reduced because a gas adsorbing porous substance is directly mixed into a plastic film, and service life and hand feeling of a barrier material are affected, the mechanical properties of the plastic film as a fruit and vegetable packaging film is greatly improved, the barrier properties of the film and the service life of the film are improved, and the storage time of fruits and vegetables is prolonged.