415results about How to "Raw material environmental protection" patented technology

The invention relates to a water-soluble chitosan quaternary ammonium salt antibiotic finishing agent. The invention is characterized in that the antibiotic finishing agent is names as O-methacrylamide-N-hydroxypropyl alkyl dimethyl ammonium chloride chitosan and the concrete structural formula is as follows. The preparation thereof includes that: alkyl dimethyl tertiary amide and epichlorohydrin are taken as raw materials to synthesize 2, 3-epoxy alkyl dimethyl ammonium chloride, then the 2, 3-epoxy alkyl dimethyl ammonium chloride is introduce onto the ammonium group of chitosan, so as to obtain N-hydroxypropyl alkyl dimethyl ammonium chloride chitosan HDCC, and then crosslinking is carried out on the HDCC and hydroxymethyl acrylamide is carried out, thus obtaining NMA-HDCC. The quaternary ammonium salt antibiotic finishing agent contains water-soluble group and fibrous reactivity group and has good water solubility, the bacterial inhibition rate of finished cotton fabrics is close to 100%, and the finishing agent can be combined with cellulose fiber by covalent bond and is wash-resistant; and cost is low, raw material is environmental friendly, environmental pollution is less, thus having industrialization application prospect.

The invention relates to an amination lignin containing reactive aminos and a preparation method and an application of the amination lignin. The amination lignin containing the reactive aminos has a structural formula as shown in the description. The preparation method comprises the following steps: taking alkaline lignin and epoxy chloropropane as raw materials to synthesize epoxy lignin containing a plurality of epoxide groups under a certain condition; allowing the epoxy lignin derivatives and polyamine compound to react so as to prepare the amination lignin which contains a plurality of active groups such as primaquine groups and secondary amine groups. The amination lignin reserves favorable heat resistance of the alkaline lignin, and is a favorable base material for preparing a macromoleclar polymer material. Moreover, the amination lignin takes biomass which is a recycled material as the raw material, and is low in cost, environment-friendly in raw material, and generates less environment pollution, and therefore has an industrialized application prospect.

The invention provides a pressure injection method for integral forming of a non-pneumatic tire. The method includes the following steps that firstly, configured raw materials for manufacturing the non-pneumatic tire are placed into a material storage box and are evenly stirred; secondly, the temperature of a pre-heating pressure injection machine is raised to 180-190 DEG C; thirdly, pressure of the pre-heating pressure injection machine is increased to 50-60 Pa; fourthly, the material inflow speed is adjusted to 10-20 m / s; fifthly, the pressure holding time is adjusted to 2-3 min; sixthly, the raw materials for manufacturing the non-pneumatic tire in the first step are injected into the pressure injection machine, and operation is started according to a preset mode; seventhly, after mold assembly, injection, hot melting, cooling and mold disassembly are sequentially performed, the non-pneumatic tire is obtained. The technology is simple, multi-time machining is not needed, one-time forming is achieved, operation is convenient, and cost is low; the obtained non-pneumatic tire is uniform and reasonable in structure and is not divided into an inner tire and an outer tire, friction force and resistance between the inner tire and the outer tire are eliminated, dynamic balance is good, and the non-pneumatic tire is resistant to abrasion and rolling and durable.

The invention belongs to the field of electro-conductive paste and particularly relates to a method for preparing a submicron silver powder for the electro-conductive paste, comprising the step of adding a dispersing agent and a reducing agent into a silver salt aqueous solution to reduce the elemental silver. The method is characterized in that nano-silver particles are added into the silver salt aqueous solution before the dispersing agent and the reducing agent are added, wherein the nano-silver particles have the size of 5-10nm, and the addition amount of the nano-silver particles is 0.3-0.6 per mill of the mass of the silver salt which is the solute in the silver salt aqueous solution. The method is simple in process and has a low requirement for equipment. The raw materials are environmentally friendly and cause less pollution. The submicron silver powder prepared by adopting the method has uniform particle size and a narrow distribution range.

The invention discloses polyamide hot melt adhesive. Main raw materials of the polyamide hot melt adhesive are pentamethylene diamine and aliphatic dicarboxylic acid, wherein at least one of the main raw materials is prepared through a biological method. The hot melt adhesive has the advantages of environmental friendliness and renewability, the mechanics property is equivalent to that of the existing hot melt adhesive, and the hot melt adhesive can substitute the existing hot melt adhesive to be applied to the fields such as fiber textile adhesion, shoemaking lasting, electric appliances, mechanical industry, metal, manufacturing of plastic layering composite material, automobile, civil construction and furniture and has a promising application prospect.

The invention relates to an effective environment protective acid fixing agent that is prepared by a polypropylene acid fixing agent, an addition agent and a solvent which are matched. The polypropylene acid fixing agent is prepared by the following steps: mixing isopropanol, methacrylic acid, 2-acrylamido-2-methylpropane sulfoacid, acrylic acid and sodium persulfate in deionized water to be reacted for 1 to 5 hours at 80 to 90 DEG C and acquiring a reaction product, namely, the polypropylene acid fixing agent by post treatment. The preparation method of the effective environment protective acid fixing agent includes: adding proper water, adding all the materials under the condition of stirring at 40 to 50 DEG C in sequence to be mixed for 2 to 3 hours, uniformly dissolving, filtering, discharging and controlling the pH to be 6 to 7. The materials of the invention are environment-protective, can reduce the treatment cost of waste water and can generate remarkable social and economic benefits.

The invention discloses a preparation method and an application of a cotton environment-friendly flame retardant. The method comprises the following steps: respectively preparing an aldehyde-free flame retardant, a phosphorus-nitrogen-silicon ternary flame retardant and a phosphorus-element synergistic flame retardant; and mixing the prepared flame retardants to prepare the environment-friendly flame retardant. The flame retardant has the advantages of high efficiency, low smoke, low toxicity, and small in injury to fabric; the raw materials are environment-friendly and low in price; and the preparation method is simple in process and high in production rate. The invention further designs application of the cotton environment-friendly flame retardant. The flame retardant is applied to the fabric; the arranged fabric is relatively good in flame retardant effect, and the softness of the fabric is not greatly affected.

The invention relates to a microwave-assisted aqueous two-phase extraction method for separating kudzu root total flavone, which comprises the following steps: 1) preparation of an aqueous two-phase system: taking an inorganic salt, adding water to dissolve the inorganic salt, and adding an organic solvent to obtain a aqueous two-phase extractant; and 2) microwave-assisted aqueous two-phase extraction: adding kudzu root powder into the aqueous two-phase extractant obtained in the step 1), carrying out microwave-assisted extraction, and carrying out vacuum filtration to obtain an obvious phase-separated kudzu root flavone extracting solution. Compared with the prior art, the method provided by the invention has the following advantages: (1) the method is simple to operate and does not need to wait for phase separation; 2) the process is integrated; 3) the extraction process is quick and efficient; 4) the extraction solvent is low in toxicity; 5) the interfacial tension is small, thereby being beneficial to mass transfer between the two phases; 6) abundant impurities can be removed along with solid matters, thereby being beneficial to purifying the sample; and 7) the extraction method does not have obvious scale-up effect, can easily implement technique amplification and continuous operation, and can be directly connected with the subsequent purification procedure without special treatment.

The invention relates to a releasing agent special for bare concrete and a preparation method thereof. The releasing agent special for the bare concrete is a water dispersion solution and comprises raw materials including organic modified silicone oil accounting for 62%-75% of the total mass of the raw materials, polyacrylamide accounting for 0.01%-0.05% of the total mass of the raw materials, fatty acid amide accounting for 3%-5% of the total mass of the raw materials, organic amine accounting for 0.01%-0.2% of the total mass of the raw materials, polyoxypropylene glycerol ether accounting for 10%-15% of the total mass of the raw materials and water accounting for 11%-18% of the total mass of the raw materials. The polyacrylamide is firstly solved in the water, the temperature is improved to be 35-55 DEG C, other components are added after even stirring, natural cooling is performed after re-stirring to obtain the releasing agent special for the bare concrete. The appearance effect of a bare concrete cement product can be improved, the surface of the bare concrete cement product can be smooth and free of air bubbles, the releasing agent special for the bare concrete is environmentally friendly, free of pollution and low in cost, 1-7.5 times of water can be added for dilution when the releasing agent is used, 3-4 times of continuous releasing can be performed through one-time spraying, and performance is stable.

The invention discloses an environmental-friendly disposable plant fiber tableware which comprises the following raw materials in parts by weight: 10-18 parts of rice husk, 15-25 parts of corn straw, 10-20 parts of dried straw, 2-4 parts of starch, 8-14 parts of an adhesive, 4-10 parts of processing aids, 2-4 parts of plant albumen glue and 1-3 parts of plant polysaccharide. The disposable tableware disclosed by the invention is non-toxic and harmless, is relatively good in mechanical property, relatively good in mechanical strength and toughness, green and environmental-friendly in raw material, relatively good in degradability, wide in raw material source, safe and reliable in component, harmless to human bodies, low in cost, safe and convenient, simple in preparation process and has relatively high practical values and good application prospects, both resources are saved and environment pollution is reduced, and comprehensive utilization of agricultural wastes is achieved.

The invention discloses a preparation method of a ZnIn2S4 photocatalyst by hydrothermal synthesis of ionic liquid microemulsion. The preparation method comprises the following steps: (1) adding a sulfur source into the ionic liquid and a surfactant, heating, and stirring until the sulfur source is dissolved to obtain a mixture A; (2) fully dissolving a divalent zinc salt and a trivalent indium salt in deionized water to obtain a mixture B; (3) transferring and mixing the mixture A and the mixture B in an autoclave having polytetrafluoroethylene lining and uniformly stirring; (4) closing the autoclave, placing the autoclave at 50-90 DEG C and reacting for 4-24 hours and naturally cooling at room temperature to obtain a yellow precipitate; and (5) respectively washing the yellow precipitate with deionized water and anhydrous ethanol, transferring to a drying oven and drying overnight at 40-90 DEG C to obtain the final product. The preparation process is simple, rich in raw materials and low in cost, and the product has the advantages of large specific surface area, high catalytic activity and high hydrogen generation efficiency.

The invention discloses a deep eutectic solvent. A hydrogen bond donor of the deep eutectic solvent is a protonic acid; a hydrogen bond acceptor of the deep eutectic solvent is an ammonium salt containing a specific functional group; and the specific functional group is alkylene, a sulfonic acid group, a carboxyl group, an ether group, an amino group or a sulfhydryl group. The deep eutectic solvent can efficiently hydrolyze celluloses to glucose. The invention also discloses a method of preparing the glucose by using the deep eutectic solvent to hydrolyze cellulose biomasses. The method comprises the following steps of: adding the cellulose biomass and the deep eutectic solvent to a reactor, and reacting at the temperature of 80-120 DEG C for 0.5-10h to obtain the hydrolysate glucose. Themethod has the characteristics of high reduction selectivity and high yield of glucose products in the process of using the cellulose biomass to prepare the glucose, can ensure that the glucose product meets the production quality requirements, and has very good economic, environmental and social benefits.

The invention relates to an Apocynum venetum L. blended yarn and applications thereof. The yarn is prepared by blending Apocynum venetum L. fiber and Tencel fiber so that the Apocynum venetum L. and Tencel blended yarn is used to weave textiles, wherein the Tencel belongs to a kind of cellulose fiber and has green and environmentally friendly production process; the Apocynum venetum L. belongs to a kind of natural fibrilia which contains various pharmaceutical components such as flavonoids, cardenolide, quercetin and amino acids and can emit far-infrared rays, thus bringing the biological effect of human body, improving the microcirculation, activating tissue cells, improving metabolization function, increasing immunity, achieving the effects of strengthening health and curing diseases and inhibiting the generation of germs; and the Apocynum venetum L. fiber is blended with the Tencel fiber, thus the blended yarn has smooth surface, soft hand feeling and bright color and also has hydroscopicity and air permeability. The home textile fabric has good comfort to the skin the and green and environmentally friendly raw material, thus the aim of the invention can be realized.

The invention provides a light carbon fiber epoxy resin composite eco-friendly plate. The light carbon fiber epoxy resin composite eco-friendly plate comprises, by weight, 10-18 parts of carbon fibers, 35-50 parts of epoxy resin, 5-15 parts of polytrimethylene terephthalate, 3-8 parts of hollow micropowder, 10-25 parts of starch, 2-5 parts of expanded perlite, 3-8 parts of polyethylene wax, 15-30 parts of eco-friendly glue and 0.5-2.5 parts of an antioxidant. The light carbon fiber epoxy resin composite eco-friendly plate utilizes the epoxy resin as a matrix, carbon fibers and polytrimethylene terephthalate, has good mechanical properties and processability, has low density and a large weight loss rate, utilizes eco-friendly raw materials and has a wide application range and a large market potential.

The invention provides a lignin epoxy resin / carbon fiber reinforced composite material. The lignin epoxy resin / carbon fiber reinforced composite material is obtained by cross-linking and solidifying lignin epoxy resin and a carbon fiber material; the carbon fiber material is enhanced by the specific enzymatic hydrolysis lignin epoxy resin; under the condition of the same use amount of the carbon fiber materials, the strength and the toughness of the obtained composite material are significantly more excellent than the data of the material using the conventional bisphenol A type epoxy resin; and under the condition that the use amount of the carbon fiber is reduced by 16.7 percent, the strength of the obtained composite material still can be higher than the level of the common bisphenol A type epoxy resin / carbon fiber composite material, negative influence on other properties of the composite material is avoided and the cost of the carbon fiber composite material is reduced; furthermore, the raw materials are more environmentally-friendly and the lignin epoxy resin / carbon fiber reinforced composite material is very suitable for industrial production and commercial popularization.

The invention discloses a sludge autoclaved brick. The sludge autoclaved brick comprises the following raw material components in parts by weight: 20-60 parts of sludge dehydrated mud cakes, 11-25 parts of first fly ash, 0-10 parts of carbide slag or first lime, 22-39 parts of furnace slag and 1-6 parts of a reinforcing agent, wherein the sludge dehydrated mud cakes comprise the following raw material components in parts by weight: 33-66 parts of sludge, 15-33 parts of second fly ash, 15-33 parts of second lime and 1-5 parts of a coagulating agent. The autoclaved brick is prepared from industrial wastes as main raw materials, and is low in energy consumption, non-sintered, safe, healthy and stable for a long time. The invention also discloses a preparation method of the sludge autoclaved brick. According to the preparation method, the sludge water content is controlled in a mode of conditioning at first and then dehydrating to form the sludge dehydrated mud cakes, and the fly ash and the like are added to perform hydration reaction. The autoclaved brick prepared by the method can meet performance requirements of a standard brick, and the production process is simple, low in energy consumption and environment-friendly.

The invention discloses a rose essential oil microcapsule emulsion, and a preparation method and application thereof. The rose essential oil microcapsule emulsion is prepared a wall material A, a wallmaterial B and a core material through blending, emulsifying and crosslinking, wherein the wall material A is Arabic gum, gelatin or chitosan, the wall material B is polyvinyl alcohol or sodium alginate, and the core material is rose essential oil. A water-based coating containing the rose essential oil microcapsule can be prepared by adding the rose essential oil microcapsule emulsion into a water-based coating. The rose essential oil microcapsule emulsion prepared in the invention is long in service life, good in slow release effect, good in durability, high in compatibility with a coatingand easy to be uniformly dispersed in the coating; moreover, due to the unique pharmacological properties and bactericidal action of the rose essential oil, the water-based coating containing the roseessential oil microcapsule can effectively avoid the use of bactericides in the coating, is safe and environment-friendly, and has good conditioning effect on people with long-term insomnia and irritable mood.

The invention relates to the field of building boards and in particular relates to a novel composite board and a preparation method thereof. The novel composite board comprises a bottom board and a panel layer which is stuck on the bottom board, wherein the bottom board comprises the following raw materials in parts by weight: 90-110 parts of PVC particles, 40-60 parts of calcium carbonate powder, 3-6 parts of a stabilizer, 1.0-1.4 parts of a foaming agent, 6-8 parts of a foaming regulator, 0.3-0.5 part of polyethylene wax, 0.3-0.4 part of internal lubricant, 0.2-0.4 part of oxidized polyethylene wax, 4-6 parts of chlorinated polyethylene, 0.5-1.5 parts of an internal lubricant additive and 9-11 parts of wood powder. The novel composite board has the good waterproof and damp-proof effects and solves the problem that common boards in the prior art are soaked by water so as to seriously deform. The novel composite board also has the recycling characteristic and solves the technical problem that a large amount of wood needs to be consumed in wooded boards in the prior art.

The invention discloses a coating material based on a graphene nanometer container, and a self-repairing coating, a preparation method and applications thereof, wherein the coating material comprisesa first component and a second component, the first component comprises 20-40 parts by weight of an epoxy resin, the second component comprises, by weight, 0.1-2 parts of a graphene nanometer container loading a corrosion inhibitor, 1 part of a diluent, 30-60 parts of an epoxy curing agent, 1 part of an antifoaming agent and 1 part of a leveling agent, the graphene nanometer container loading thecorrosion inhibitor comprises graphene grafted with cyclodextrin and a corrosion inhibitor reversibly combined with the cyclodextrin. According to the invention, the preparation process is simple, theraw materials are environmentally friendly, cheap and easy to obtain, and the self-repairing coating formed by the coating material is excellent in protection performance, has good shielding performance (passive corrosion resistance) and self-repairing performance (active corrosion resistance), and can be widely applied to the fields of metal anticorrosive coating materials for ocean facilities,ship equipment, nuclear power industry and the like.

The invention relates to an environment-friendly material with flame-retardant effect, which comprises 5-8 parts by mass of plastics, 1-3 parts by mass of kaolin, 0.5-1.5 parts by mass of bamboo powder, 2-4 parts by mass of flame retardants, 0.5-1 parts by mass of chemical additives. When compared with current products, the material of the invention has low cost and good kaolin viscosity, and can substitute 3%-5% of plastics; because of certain flame-retardant effect of kaolin, 3%-5% of flame retardants can be relatively reduced; and thus the cost is reduced, and large industrial demands become possible. The application scope of the new product is improved, and the market share is extended.

The invention discloses an environmentally friendly soil curing agent and a preparation method. The environmentally friendly soil curing agent comprises 30 parts of papermaking sludge, 15 parts of slag powder, 32 parts of sodium polyacrylate, 36 parts of glycerol, 26 parts of sulfonated oil, 18 parts of an exciting agent, 9 parts of an oxidant, 10 parts of a dispersant, 2 parts of a polymeric additive, 0.6 part of a surfactant, 4 parts of lignin fiber, 10 parts of amino silanol, and 3-6 parts of a water absorbing agent. The environmentally friendly soil curing agent of the invention can be processed in a wide range, the hardness of obtained cured soil is in a high range, the obtained cured soil has the advantages of high durability, strong permeability and good water resistance, and the curing agent has the advantages of low production cost, environmental protection and no pollution.

The invention discloses a bacterial cellulose membrane / porous carbon adsorbent and preparation thereof. The bacterial cellulose membrane / porous carbon adsorbent is prepared by taking a bacterial cellulose membrane as a matrix, taking different saccharides as carbon sources and using a hydrothermal carbonization method; due to the anchoring function of a large number of hydroxyls on the surface of the bacterial cellulose, the porous carbon can be preferably dispersed in the bacterial cellulose membrane and different nano pore diameters can be obtained by adjusting the growth process of the bacterial cellulose membrane. The adsorbent combines the filtration of the nano pore diameters of the membrane and the adsorption of the porous carbon, is used for adsorbing and dispelling PM2.5 smoke and poisonous gas and has the advantages f being environmentally friendly and high in efficiency.

The invention discloses a preparation method of a double-component non-solvent polyurethane adhesive used for food-grade packaging. The polyurethane adhesive is prepared from an end NCO component A and a component B, wherein the component A is prepared from aliphatic diisocyanate and end-OH polyether polyol, and the component B is castor oil-based polyester polyol which is prepared from castor oil, glycerin and hexahydro-phthalic anhydride in an ester exchange and esterification reaction mode, and the two components are proportioned according to NCO / OH functional groups. Solvent and organic tin catalysts are not used, the polyurethane adhesive does not contain benzene ring components, the vegetable oil is introduced to reduce dependency on petroleum polyhydric alcohol, and the polyurethane adhesive is safe, environmentally friendly, free of pollution and capable of meeting the compositing requirement of a food packaging composite film and has excellent adhesive performance.

The invention discloses a bactrocera dorsalis slow-release type attractant which includes the following components by mass percent: 80-90% of methyl eugenol, 5-10% of a synergist and 5-15% of a slow-release agent, wherein the synergist adopts one or more of orange oil, psidium guajava essential oil, mango essential oil, loquat flower essential oil and carambola essential oil; the slow-release agent adopts one or more of vegetable oil and gutter oil. The bactrocera dorsalis slow-release type attractant provided by the invention adopts a simple, effective and pollution-free slow-release and synergistic technology, and includes not only methyl eugenol active substances but also plant essential oil which has a synergistic effect, as well as the slow-release drug for increasing the drug effect duration, so as to prolong the attraction time and improve the attraction effect of the bactrocera dorsalis attractant, and satisfy technology requirements for effective and long-lasting prevention and control. The raw materials used by the bactrocera dorsalis slow-release type attractant have the characteristics of being environment-friendly, low in cost and long in drug effect duration.

The invention relates to cable materials and a preparation method thereof, in particular to a low-smoke flame-retardant rubber cable material and the preparation method thereof. The low-smoke flame-retardant rubber cable material is composed of the following raw materials including, by weight, 40-100 parts of natural rubber, 40-80 parts of chloroprene rubber, 30-40 parts of nitrile rubber, 4-5 parts of stearic acid, 4-5 parts of a coupling agent, 5-6 parts of zinc oxide, 5-6 parts of antioxidant BHT, 3-5 parts of accelerator, 100-120 parts of a fire retardant and 60-100 parts of a filling agent. The main component of the natural rubber is polyisoprene which is one of the air-dried rubber piece and crepe; the accelerator is rubber accelerator TMTD; the chloroprene rubber is an elastic body generated through alpha-polymerization with chloroprene as a main raw material. The low-smoke flame-retardant rubber cable material and the preparation method thereof have the advantages that low-smoke, fire-retardant and weather-resistance effects of the cable material are achieved, environmental-protection and safety are achieved, the physical and mechanical properties and the machining processing property of the prepared cable material are good, the machining is easy, the raw materials are more environmental, the toxicity is low, and the popularization strength is large.

The invention relates to a cable material and a preparation method thereof and concretely relates to a high temperature-resistant low-smoke flame-retardant rubber cable material and a preparation method thereof. The high temperature-resistant low-smoke flame-retardant rubber cable material comprises, by weight, 40-100 parts of natural rubber, 40-80 parts of chloroprene rubber, 30-40 parts of nitrile rubber, 4-5 parts of stearic acid, 4-5 parts of a coupling agent, 5-6 parts of zinc oxide, 4-5 parts of a stabilizing agent, 3-5 parts of a promoter, 100-120 parts of a fire retardant and 60-100 parts of a filler. The natural rubber mainly comprises polyisoprene and is one of an air-dried rubber sheet and crepe. The promoter is a rubber promoter TMTD. The chloroprene rubber is an elastomer formed by alpha-polymerization of chloroprene as a main raw material. The cable material has the advantages of low smoke, flame resistance, weather resistance, environmental friendliness, safety, excellent physical and mechanical properties and processability, processing easiness, environmentally friendly raw materials, low toxicity and good generalization performance.

The invention relates to a vegetable oil modified fluoride-containing water repellent finishing agent as well as a preparation method and an application thereof. The general structural chemical formula is shown in the right. The preparation comprises: (1) adding hot water and NaOH into the vegetable oil, carrying out water bath heating at 80 DEG C to obtain sodium aliphatate;(2) dissolving the sodium aliphatate with water and adding sulfuric acid for acidification to obtain higher fatty acid; and (3) reacting the higher fatty acid with CF3-(CF2)n-CH2OH at 60 DEG C for 4-8h to obtain the vegetable oil modified fluoride-containing water repellent finishing agent. The water repellent finishing agent of the invention does not have obvious influence on the air permeability, whiteness and breaking strength of cellulosic fiber; and synthesis process is simple, cost is low, raw material is environment-friendly, and environment pollution is slight.

The invention provides a solidified and modified lignin epoxy resin / carbon fiber reinforced composite material and a preparation method and application. The solidified and modified lignin epoxy resin / carbon fiber reinforced composite material is prepared from lignin epoxy resin and a carbon fiber material through cross-linking and solidifying, wherein an anhydride solidifying agent contains anhydrides formed by connecting siloxane chain segments. The lignin epoxy resin / carbon fiber reinforced composite material solidified by the solidifying agent is excellent in comprehensive mechanical property, while other mechanical properties of the composite material are not affected, the toughness of the material is greatly enhanced, the impact strength is obviously improved, the application rangeis expanded, the surface life is prolonged, and the composite material is very suitable for industrial production and commercial popularization.

The present invention discloses a double-component solid bag-hanging carbon dioxide delayed release gas fertilization agent. Said invention includes two solid components of delayed release agent and solid carbonate, they are chemically-modified diatomite and ammonium hydrogen carbonate respectively. Said invention also provides its concrete preparation method and its application method.

The invention discloses a halogen-free phosphorus-containing flame retardant and a preparation method thereof. The halogen-free phosphorus-containing flame retardant has a structural general formula described in the specification, wherein -R1 to R12 are selected from one or more of alcoholic amino groups or phenolic amino groups, and the halogen-free phosphorus-containing flame retardant integrates a bio-based acid source and a carbon source, and is high in flame retardant efficiency, simple in synthesis process, pollution-free, green and environment-friendly in raw materials and low in cost.The invention also discloses a bio-based halogen-free flame-retardant polylactic acid material prepared from the flame retardant. The bio-based halogen-free flame-retardant polymerized emulsion with excellent flame-retardant property and better mechanical property is obtained by adding a small amount of the flame retardant and optionally adding a flame retardant aid and an antioxidant. When the addition amount of the flame retardant accounts for 0.5-8.9% of the mass fraction of polylactic acid, the limit oxygen index of the obtained bio-based halogen-free flame-retardant polylactic acid reaches 24-33%. The preparation method of the bio-based halogen-free flame-retardant polylactic acid material is simple, free of solvent influence, easily available in raw materials, easily controllable intechnological process and suitable for large-scale industrial production.