34results about How to "Increase absorbance" patented technology

The invention relates to an extended-range resonant photoacoustic cell for acetylene detection and a detection method thereof, belongs to the technical field of partial discharge in a high-voltage insulating transformer, and provides the extended-range resonant photoacoustic cell for acetylene detection in order to solve the problem that a photoacoustic spectrum detection device is poor in sensitivity. Comprising a first buffer cavity, a second buffer cavity, a laser, four reflectors, a photoelectric detector and a controller which are arranged in a shell, and a resonance gas chamber is arranged between the first buffer cavity and the second buffer cavity so as to communicate the first buffer cavity with the second buffer cavity; the laser is located on one side of the first buffer cavity. The four reflectors are symmetrically arranged in the first buffer cavity and the second buffer cavity in pairs respectively; the photoelectric detector is used for detecting optical signals; the microphone is used for sound signals; the controller is used for processing the optical signal and the acoustic signal to obtain a detection result of the characteristic gas. The four reflectors not only can increase the absorbance, but also can realize continuous monitoring and improve the detection sensitivity.

According to the method, phosphomolybdic acid, copper chloride and ferric chloride serve as precursors, copper and iron-containing phosphomolybdic acid nano-enzyme (Cu, Fe-PMs) with peroxidase-like activity is synthesized through a microwave method, under the acidic condition, on one hand, the surface of Cu and Fe-PMs carries negative charges, high affinity is generated between Cu and Fe-PMs and a substrate TMB with positive charges, and on the other hand, the surface of Cu and Fe-PMs has negative charges; on the other hand, Cu / Fe / Mo three-metal redox couple accelerates the regeneration of Fe < 2 + > and plays an important role in the activity of peroxidase, and meanwhile, due to the introduction of sodium dehydroacetate, Cu and Fe in Cu and Fe-PMs and pyranoid ring and keto O in sodium dehydroacetate interact through coordinate bonds to cause electron interaction, so that the peroxidase-like activity of Cu and Fe-PMs is enhanced, and the peroxidase-like activity of Cu and Fe-PMs is improved. And the Fenton reaction is enhanced through transfer of electrons among the sodium dehydroacetate, the Cu and the Fe-PMs. When Cu and Fe-PMs oxidize TMB and H2O2, sodium dehydroacetate enhances the absorbance of the system, and on the basis, a novel colorimetric rapid detection method of sodium dehydroacetate is established.

The invention discloses a warpage marking device, and relates to the technical field of glass substrate warpage detection, the warpage marking device comprises a detection equipment main body, the middle position of the detection equipment main body is fixedly connected with a detection table, a driving pneumatic cylinder is installed above the detection table, and the output shaft end of the driving pneumatic cylinder is provided with a detector; the detector is located at the eccentric position above the substrate main body, so that detection is not limited to the central area of the plate, the surface of the substrate main body can be completely covered, more accurate surface data feedback analysis is achieved, the surface integrity of the substrate main body can be evaluated more accurately, and meanwhile the detection accuracy is improved through dynamic adjustment of the detection area in the process. Different detection positions of the detector are increased while the irradiation range of the detector is reduced, so that each part of the substrate can be subjected to uniform and sufficient detection feedback, the problem that in a traditional method, light is excessively focused on a central area and detection of an edge area is insufficient is solved, and uniform distribution and comprehensive coverage of detection light are ensured.

The invention discloses an application of a self-driven perovskite photoelectric detector in a visible light sensitive chip. The self-driven perovskite photoelectric detector comprises an electrode, a first charge transport layer, a second charge transport layer and a perovskite layer, wherein the perovskite layer is a thin film of an interdigital structure formed by low-dimensional and three-dimensional perovskite, and the low-dimensional perovskite is any one or a combination of more of zero-dimensional perovskite, one-dimensional perovskite and two-dimensional perovskite; the first charge transport layer is one or a combination of a hole transport layer and an electron blocking layer, and the second charge transport layer is one or a combination of an electron transport layer and a hole blocking layer; or the first charge transport layer is one or a combination of more of the electron transport layer and the hole blocking layer, and the second charge transport layer is one or a combination of more of the electron transport layer and the hole blocking layer. According to the perovskite photoelectric detector, the problem of limited application caused by insufficient visible light detection performance of the existing silicon-based and perovskite visible light detectors is solved.

The invention relates to a preparation method of an aluminum alloy corrosion-resistant composite coating, and belongs to the technical field of aluminum alloy treatment. The method comprises the following steps: firstly, mixing sodium phosphate, sodium silicate, sodium fluoride, ammonium metavanadate, sodium molybdate and sodium hydroxide according to a specific proportion to prepare a micro-arc oxidation liquid medicine, and carrying out micro-arc oxidation treatment on a pretreated aluminum alloy to form a black micro-arc oxidation coating; then, potassium permanganate and hydrogen peroxide are used for treating the multi-walled carbon nanotubes, zinc elements are introduced into the carbon nanotubes, the carbon nanotubes and the graphene oxide are combined through ball milling treatment, meanwhile, a silane coupling agent KH560 is added, compatibility is further enhanced, and the composite filler is obtained. And the composite filler is mixed with water-based acrylic resin emulsion, water-based polyurethane emulsion and the like to prepare an electrophoretic coating, and the aluminum alloy subjected to micro-arc oxidation is subjected to electrophoretic deposition treatment to obtain the composite coating. The aluminum alloy corrosion-resistant composite coating prepared through the method has excellent absorbance and good corrosion resistance.

The invention relates to a super-hydrophobic thermal management composite coating synthesized by modified spent bleaching clay and a preparation method thereof. The preparation method comprises the following steps: carbonizing a part of spent bleaching clay powder in a tubular furnace; carrying out air burning oxidation treatment on one part of spent bleaching clay powder in a tubular furnace; the method comprises the following steps: respectively adding two parts of spent bleaching clay powder into a mixed solution of hexadecyl trimethyl siloxane, tetraethyl silicate, ammonia water and ethanol, and carrying out hydrophobic treatment to obtain a dispersion liquid; sequentially centrifuging, washing and drying the dispersion liquid to obtain modified oxidized and carbonized spent bleaching clay powder; sequentially carrying out washing, drying and plasma treatment on the two surfaces of the substrate; mixing the oxidized and carbonized waste white clay powder with resin and a curing agent respectively, then adding the mixture into a solvent for stirring treatment, and preparing a spraying coating through ultrasonic oscillation treatment; the spraying paint is sprayed on the two faces of a prepared substrate respectively, and the modified spent bleaching clay synthesized super-hydrophobic thermal management composite coating is obtained after curing. The composite coating prepared by the method can obviously reduce the energy consumption in the aspects of heating and cooling.

The invention discloses a protection liquid for green light cutting and a preparation method and application thereof.The protection liquid is prepared from, by mass, 20-40 parts of water-soluble resin, 0.25-0.5 part of a green light absorbent and 50-100 parts of a solvent; wherein the water-soluble resin comprises water-soluble polyester and sodium polystyrene sulfonate; the green light absorbent comprises allura red and lac acid. The water-soluble resin is not easy to etch, the etching selection ratio is high, and the etching depth required by the base material can be met under the condition that the loss of the protective film layer is minimum; the relatively high solubility of sodium polystyrenesulfonate is beneficial to improving the solid content of the resin, improving the thickness of a film layer and improving the stability of the protection liquid; besides, the green light absorbent adopts the combination of allura red and lac acid, so that the solution stability and the light stability of the green light absorbent can be ensured, the addition amount of the absorbent is increased, and the absorbance is improved.

The invention discloses photovoltaic power generation panel self-cleaning equipment which comprises a photovoltaic module frame, a dustproof film, a film driving mechanism, a film cleaning mechanism and a photovoltaic panel fog and water removing mechanism. The photovoltaic module frame comprises a bottom plate, a rear side plate, a front side plate and a top inclined plate; the film driving mechanism comprises a guide roller combination and a driving roller combination; the membrane cleaning mechanism comprises a cleaning pump and a cleaning membrane piece; the photovoltaic panel fog and water removing mechanism comprises a photovoltaic surface scraping strip and a scraping strip back-and-forth pulling motor, and a layer of water absorbing sponge is arranged at the bottom of the photovoltaic surface scraping strip. The surface of the photovoltaic panel does not need to be cleaned, cleaning is convenient, automatic cleaning is achieved, the photovoltaic panel below the dustproof film is in a sealed state, water vapor agglutination can occur, and air water drops or fog layers can be discharged through the photovoltaic panel fog water removing mechanism at regular intervals, so that the surface glossiness of the photovoltaic panel is improved, and the light absorptivity is improved.

The utility model provides a battery assembly and a photovoltaic system. The battery assembly comprises a plurality of battery strings which are sequentially arranged in the first direction, each battery string comprises a plurality of battery pieces which are sequentially arranged in the second direction, and the first direction intersects with the second direction; the plurality of battery strings comprise a first battery string, a second battery string and a third battery string which are sequentially arranged along the first direction, and two ends of the second battery string in the first direction are respectively overlapped with the same sides of the first battery string and the third battery string. According to the battery assembly provided by the embodiment of the utility model, the two ends of the second battery string in the first direction are respectively overlapped with the same side of the first battery string and the third battery string, so that the string distance between the adjacent battery strings can be eliminated, and sunlight cannot penetrate out from the interval between the adjacent battery strings; the light absorption rate of the battery assembly can be improved, and the efficiency of the battery assembly is improved.

The application belongs to the field of organic photovoltaics, and relates to a kind of polymer photovoltaic material and its preparation method and application. Double bromide compound A and double side tin compound B are subjected to Stille cross coupling reaction under the action of palladium catalyst, and the polymer photovoltaic material is obtained. The polymer photovoltaic material prepared by the application has an ultra-wide absorption spectrum range from 300 nm to 1200 nm. Such material exhibits an ultra-wide spectral range and a high extinction coefficient, and embodies excellent light absorption capacity. The strong light absorption capacity of the polymer photovoltaic material prepared by the application will help to improve the device efficiency of organic photovoltaics and improve the energy conversion efficiency of the device. The polymer photovoltaic material prepared by the application provides reference value for the design of functional materials in many fields of organic photoelectricity and solar energy utilization and conversion.

The present invention provides a protective film agent and a method for processing a workpiece, the protective film agent being capable of forming a protective film suitable for processing with a laser beam. The protective film agent is coated on a workpiece when the workpiece is processed, the protective film agent comprising: a water-soluble resin; a light absorber having a flavone structure, a flavonol structure, or an isoflavone structure; and a solvent that dissolves the resin and the light absorber.

The invention relates to the technical field of phase change materials, and discloses an MXene / MWCNT reinforced charcoal-based composite phase change material and a preparation method thereof, the preparation method comprises the following steps: S1, preparing MWCNT and a metal salt to obtain a suspension; adding biomass into the suspension, and drying to obtain a precursor; s2, performing heat treatment on the precursor to obtain biochar; blending and drying the biochar and a perfluorooctanoic acid ethanol solution to obtain a support material; s3, blending and drying the support material and an MXene solution to obtain an enhanced support material; s4, the enhanced support material is subjected to a vacuum impregnation method, and the bio-based composite phase change material is obtained. Compared with paraffin and unreinforced composite PCM, the heat conductivity of the composite PCM prepared by the invention is respectively improved by 313.77% and 26.3%. And by adopting the biochar-based support material, the paraffin encapsulation efficiency is improved again and reaches 85.18%.

The invention provides a preparation method and application of modified titanium dioxide nanoparticles. The preparation method comprises the following steps: step 1, preparing a precursor solution of WO3; step 2, adding anatase TiO2 nano-microsphere powder into the precursor solution of WO3 in the step 1, adding a dispersing agent and oxalic acid dihydrate, and then sequentially carrying out ultrasonic dispersion and mechanical stirring to obtain a turbid mixed solution; 3, carrying out a hydrothermal reaction on the mixed solution obtained in the step 2, carrying out centrifugal separation to obtain a solid product, washing the solid product with deionized water and ethanol for three times in sequence, and drying the solid product; and 4, calcining the solid product obtained after drying in the step 4 for 2-3 hours, cooling, and grinding to obtain the TiO2 / WO3 nano composite particles. According to the TiO2 / WO3 nano composite particle obtained by the invention, the interface bonding of TiO2 and WO3 is enhanced, the separation efficiency of photon-generated carriers under light irradiation is favorably improved, the TiO2 / WO3 nano composite particle has good light absorption performance, the light absorption band edge is expanded to 476 nm, the absorbance is remarkably improved, and the TiO2 / WO3 nano composite particle can be used for preparing a photo-generated cathode anticorrosive coating from a photo-anode filler.

The invention discloses a photocuring forming preparation method of high-strength fused quartz ceramic, and belongs to the technical field of photocuring forming. Comprising the following steps: blending fused quartz powder with a modifier I and a modifier II to prepare mixed powder, performing wet grinding, drying and sieving to obtain modified fused quartz powder; mixing the prepolymer I, the prepolymer II, a resin monomer I, a resin monomer II, a photoinitiator I and a photoinitiator II to prepare a photosensitive resin system; adding a dispersing agent into the photosensitive resin system, uniformly mixing, then adding the modified fused quartz powder and SiC powder, and uniformly mixing, so as to prepare fused quartz ceramic photocuring slurry; carrying out printing forming, degreasing treatment and sintering on the fused quartz ceramic photocuring slurry to obtain fused quartz ceramic; the use amount of the SiC powder is 1wt%-5wt% of the mass of the modified fused quartz powder. The preparation method can reduce the curing depth of the fused quartz, improve the forming precision and improve the sintering density of the fused quartz.

The invention provides a method for additive manufacturing of a shape memory alloy based on blue laser. The method for additive manufacturing of the shape memory alloy based on the blue laser comprises the following steps that S1, alloy powder is prepared according to a preset molar ratio; s2, the alloy powder in the S1 is dried; s3, a 3D model is established, and a cuboid base body of a pre-printing area is arranged; s4, setting 3D printing parameters; s5, a scanning strategy is set in the cuboid base body, path planning is carried out, and blue laser is selected for scanning; and S6, the dried alloy powder is subjected to laser melting preparation, and the shape memory alloy is obtained. By changing the wavelength, controlling the absorptivity and optimizing parameter control and technological processes in the alloying process, the low-crack, low-hole and multi-dislocation NiTi alloy is obtained, and a new thought and technical support are provided for further development of the NiTi alloy in the medical field.

The invention relates to the technical field of semiconductor devices, and discloses a semiconductor device, a wafer and a wafer processing method. The semiconductor device includes: a substrate; an epitaxial layer; an ohmic contact layer; the device electrode layer is located on the side, away from the substrate, of the ohmic contact layer; the at least one interconnection layer is electrically connected with the device electrode layer in the device area and located on the side, away from the substrate, of the device electrode layer, and the at least one interconnection layer comprises a top interconnection layer farthest away from the substrate; the dielectric layer is located between the top interconnection layer and the device electrode layer; the heat absorption layer is located on the side, away from the substrate, of the dielectric layer, the heat absorption layer is at least located in the cutting edge area, and the absorptivity of the heat absorption layer to light of the preset wave band is larger than that of the dielectric layer to the light of the preset wave band. According to the semiconductor device provided by the embodiment of the invention, the problem of non-uniform heat distribution in the thickness direction during laser cutting in the process of manufacturing the semiconductor device can be relieved, so that the problem of cutting thermal damage to the edge of the semiconductor device is relieved.

The ecological floating island robot includes a floating ecological oxygenation device and a light-irradiated water purification treatment device connected to the floating ecological oxygenation device. The floating ecological oxygenation device includes a submersible water pump and a water pressure booster connected to the submersible water pump. A vertically arranged nozzle is connected to the water pressure booster. The water pressure booster is fixed on a floating frame and a ring net is also connected to the floating frame, which is sleeved on the circumference of the lower end of the nozzle. The floating frame is connected to a driving device and the driving device is connected to a solar power supply device. The light-irradiated water purification treatment device includes at least two annular floating tubes connected in sequence. Any one of the annular floating tubes is connected to the floating frame through a connecting structure. A black sponge block is connected to each annular floating tube. Two adjacent black sponge blocks are connected to each other or arranged at intervals. A water purification structure is provided on each black sponge block.

The present invention discloses an application of praseodymium oxide nanoparticles in a solar evaporator and a solar evaporator, belonging to the field of interface evaporators. The technical solution includes using praseodymium oxide nanoparticles as light absorbing materials in a solar evaporator to convert solar energy into thermal energy and use it for photothermal evaporation. The present invention is applied to solar evaporators to solve the problems of low solar energy conversion efficiency, low water transport and environmental risks in existing photothermal elements. It has the characteristics of integrating the triple capabilities of photothermal conversion, water transport and thermal insulation, and is efficient, environmentally friendly and low-cost.

A resin composition and a liquid composition, a pigment compound and an optical material comprising a pigment and a resin represented by Formula 1. In Formula 1, R 1 and R 2 Each independently represents an alkyl group or an aryl group, R 3 , R 4 , R 5 and R 6 Each independently represents a hydrogen atom or a substituent, R 5 With R 6 They can bond to each other to form a 6-membered ring. #imgabs0#

The invention discloses fluorine-doped CeO2 abrasive particles and a preparation method and application thereof.The preparation method includes the steps that a cerium source and a soluble carbonate precipitator are subjected to an aging reaction to obtain a cerium-based precursor, and the cerium-based precursor, fused salt and a fluorinating agent are mixed and then roasted to obtain the fluorine-doped CeO2 abrasive particles; the synthesis method is simple, the size is controllable, the particle size distribution is uniform, the dispersity is good, and the spherical fluorine-doped CeO2 abrasive particles are obtained; the fluorine-doped CeO2 abrasive particle polishing solution has the advantages of excellent chemical mechanical polishing property, good suspension stability, slow sedimentation rate, large absorbance and large Zeta potential absolute value; when the polishing solution prepared from the sphere-like fluorine-doped CeO2 abrasive particles synthesized by the method is used for processing the surface of quartz glass, the material removal rate reaches 819.89 nm / min, a high material removal rate is obtained, due to the fact that the fluorine-doped CeO2 abrasive particles synthesized by the two-step method have high chemical activity, the material removal rate is favorably improved, and a settlement test finds that the material removal rate is greatly improved. And the suspension dispersion stability of the fluorine-doped CeO2 abrasive particles is improved.

An object of the present invention is to provide a compound not affecting a material inside a device by absorbing light at a wavelength of 400 nm to 410 nm of sunlight, and having a high refractive index at a wavelength in range of 450 nm to 750 nm in order to prevent deterioration inside the device of an organic EL device and greatly improve light extraction efficiency. The present invention was achieved by focusing on the fact that arylamine-based materials have excellent thin film stability and durability and planning a diamine compound having a specific benzazole ring structure with a high refractive index, using the compound as materials constituting a capping layer, and an organic EL device having excellent luminous efficiency was obtained.

The present invention provides a method for preparing high-purity 3-morpholinepropanesulfonic acid, which comprises the following steps: (a) methanol is added to a reaction vessel, followed by sequentially dropping morpholine and 1,3-propane sultone, and the temperature is raised after the dropwise addition to carry out a condensation reaction; (b) the first mixture is centrifuged, and a white solid is taken to obtain a crude 3-morpholinepropanesulfonic acid product; (c) the crude 3-morpholinepropanesulfonic acid product is added to purified water for stirring and dissolving, and a coarse filtration is performed to obtain a 3-morpholinepropanesulfonic acid solution; (d) the 3-morpholinepropanesulfonic acid solution is introduced into an ultrasonic crystallization system for continuous and cyclic treatment to obtain a 3-morpholinepropanesulfonic acid clear liquid; (e) the 3-morpholinepropanesulfonic acid clear liquid is finely filtered, and then decolorized to obtain a refined 3-morpholinepropanesulfonic acid solution; (f) methanol is added to the refined 3-morpholinepropanesulfonic acid solution, and crystals are separated and dried to obtain 3-morpholinepropanesulfonic acid. It is not necessary to increase the purity by multiple recrystallizations to make its absorbance qualified.

The invention relates to the field of semiconductor materials, in particular to a photoresistor material and a preparation method thereof. During preparation, transition metal ions and rare earth metal ions are sequentially injected into sulfur quantum dots, and annealing is required in an argon environment after the ion injection. The annealing temperature is 250-350° C. and the annealing time is 10-60 min. The invention uses transition metal ions to inject sulfur quantum dots to form corresponding metal sulfide quantum dots, so that the metal sulfide quantum dots have a photoresistor effect. The injection of rare earth metal ions can not only promote the growth of metal sulfide quantum dots, but also reduce their optical band gap, improve the absorption of light by photosensitive materials, generate greater photocurrent under the same illumination conditions, and improve the photoelectric conversion efficiency. The invention broadens the application field of sulfur quantum dots and provides a new path for the preparation of photoresistor materials.

The invention belongs to the technical field of photo-thermal conversion materials, and particularly relates to a solar photo-thermal conversion material, a preparation method and application, the material comprises 2-5 parts of biomass, 2-10 parts of copper chloride, 5-10 parts of nano ceramic particles, 5-20 parts of 3-aminopropyltriethoxysilane, 10-20 parts of hydroxypropyl methyl cellulose, and 5-20 parts of felt cloth. Compared with the prior art, the solar photo-thermal conversion material, the preparation method and the application provided by the invention have the advantages that light reflection can be effectively inhibited, and the absorbance is improved; in addition, the biomass is enhanced through the kaolin nano ceramic particles, and the photothermal conversion efficiency can still be kept at a high level under the condition that the solar illumination intensity is increased.

This invention belongs to the field of photochromic nanomaterials, and relates to tungsten oxide nanoparticles, a gel electrolyte, their preparation method, and applications. It provides hydrated tungsten oxide prepared by a chemical reaction in solution without drying. The hydrated tungsten oxide is added to water and dispersed evenly, then ethylene glycol is added, making the volume ratio of water to ethylene glycol 2–10:4–10. After sealing, the mixture is heated to 70–110°C and reacted for 15–45 min to obtain the final product. The dispersion concentration after the reaction is 0.5–8 mg / mL. The tungsten oxide nanoparticles prepared by this invention exhibit photochromic properties, and the preparation method is simple, low-cost, and environmentally friendly.

The invention discloses a battery piece and a photovoltaic module. The battery piece comprises a substrate, and the surface of the substrate is provided with an N-type doped layer, a P-type doped layer and an isolation region arranged between the N-type doped layer and the P-type doped layer; the N-type doping layer and the P-type doping layer are arranged in an interdigital manner, each of the N-type doping layer and the P-type doping layer comprises a main body part and a finger-shaped part, the main body parts extend along a first direction, and the finger-shaped parts are arranged on at least one side of the main body parts along a second direction; the finger-shaped part is provided with a current collection electrode extending along a second direction; the first insulating layer is arranged at the position, close to the main body part of the opposite conductive type, of the finger-shaped part; the first insulating layer covers the end portion of the collector electrode, and the first insulating layer and the adjacent isolation region are arranged at an interval in the second direction. The first insulating layer is utilized to play an insulating and isolating role, meanwhile, the shielding area of the first insulating layer on the surface of the substrate is reduced, and the problem of poor local connection of the interconnector caused by the fact that the interconnector is heightened due to the fact that the first insulating layer partially extends below the interconnector can also be avoided.

The present invention provides a resin composition, a compound, a substrate, an optical filter, a solid-state imaging device, and an optical sensor device which have extremely high absorption at a wavelength near 700 nm to 750 nm or at a wavelength near 720 nm to 900 nm, have a large ratio of absorbance in the infrared region to absorbance in the visible light region, and have excellent light resistance (durability), a compound, a substrate, an optical filter, a solid-state imaging device, and an optical sensor device. A resin composition containing a resin and a compound represented by formula (I) [in formula (I), Cn + is a monovalent cation represented by formula (II), and An-is a monovalent anion]. Cn + A < n-I > # imgabs0 #

The application discloses an application of a self-driven perovskite photoelectric detector in a visible light photosensitive chip. The self-driven perovskite photoelectric detector comprises electrodes, a first charge transport layer, a second charge transport layer and a perovskite layer; wherein the perovskite layer is a thin film in an interdigital structure formed by low-dimensional and three-dimensional perovskite, and the low-dimensional perovskite is any one or a combination of zero-dimensional, one-dimensional and two-dimensional; the first charge transport layer is one or a combination of a hole transport layer and an electron blocking layer, and the second charge transport layer is one or a combination of an electron transport layer and a hole blocking layer; or the first charge transport layer is one or a combination of an electron transport layer and a hole blocking layer, and the second charge transport layer is one or a combination of an electron transport layer or a hole blocking layer. The perovskite photoelectric detector solves the problem that the application of the existing silicon-based and perovskite visible light detectors is limited due to the insufficient visible light detection performance.

The invention discloses a biodegradable mulching film for improving ground temperature as well as a preparation method and application thereof, and relates to the technical field of agricultural new materials. The material is prepared from the following components in parts by weight: 95-97 parts of one or more of copolyester toughened polylactic acid, a polylactic acid / gelatin / acetyl tributyl citrate blending material and a polylactic acid / poly (butylene adipate-co-terephthalate) resin material; and a thermal insulation material: 3-5 parts of one or more of a copper phosphate improved material and ammonium isopropoxide modified ammonium polyphosphate. The prepared degradable mulching film has the heat preservation characteristic, the soil temperature in the early stage of cultivation of winter-spring tomatoes in a solar greenhouse can be increased, and tomato plant growth is promoted; after the mulching film is used, the mulching film is turned over, and the thermal insulation material can be used as a microelement fertilizer required by plant production, so that the later yield and economic benefits are improved.

The present application relates to the field of photothermal materials, discloses a kind of photothermal coating preparation photothermal material composition and its application and photothermal composite film and its preparation method and application, the photothermal material composition contains chitosan, hydrophilic photothermal component and optional auxiliary, wherein, the content weight ratio of the chitosan, the hydrophilic photothermal component and optional auxiliary is 1:0.1-15:0-5, the photothermal composite film prepared by the photothermal material composition provided by the present application is strong, has higher light absorption rate, photothermal conversion efficiency and driving water evaporation rate.