125results about How to "Non-toxic and harmless" patented technology

The invention relates to a preparation method of high flame retardant expansible graphite, which comprises the following steps: dissolving the graphite into a mixing solution of perchloric acid and concentrated nitric acid, wherein the dosage of the solution is 100-600% of the mass of the solution; oxidizing the graphite by using solid oxidant of which the dosage is 0.5-50% of the mass of the oxidant to obtain the primary expansible graphite, wherein the temperature of the expansible graphite is 20-80 DEG C, and the reaction time is 20-300min; dissolving tripolycyanamide or the derivants thereof and the solid oxidant into phosphoric acid of which the mass fraction is 85+/-10% to form a phosphoric acid solution, wherein the dosage of the solid oxidant is 0.5-50% of the mass thereof, and the mass concentration of the tripolycyanamide or the derivants thereof of the formed phosphoric acid solution is 0.02-2g/ml; carrying out reaction of the primary expansible graphite and the phosphoric acid solution at the temperature of 20-80 DEG C for 20-300min to prepare the high flame retardant expansible graphite. The method has the advantages that the tripolycyanamide or the derivants thereof are inserted between the expansible graphite layers, thereby improving the expansibility, start expansion temperature and fire resistance of the expansible graphite, and can be widely used for the flame retardant of multiple materials such as plastic, rubber, paint, foam and the like.

The invention relates to a manufacturing method of a plant resin specimen for teaching. The method comprises the following steps that (1) plant specimens are collected and are subjected to conventional pretreatment; (2) anhydrous silica gel is ground into powder; the powdery anhydrous silica gel and aluminum oxide powder are uniformly mixed according to a certain proportion to obtain mixed drying powder; (3) the plant specimens are put into a drying box, are completely embedded by the obtained mixed drying powder, and are then subjected to drying treatment; (4) the dried and treated plant specimens are taken out from the drying box, the redundant mixed drying power on the surface is cleared away, and then, a 30W ultraviolet lamp is irradiated for 3 to 5 minutes for sterilization inactivation treatment; (5) the treated plant specimens are put into a mold to be subjected to epoxy resin glue embedding; (6) after the epoxy resin glue is solidified, the plant resin specimen is obtained. The specimen manufactured by the method has the characteristics of transparency, sealing, oxidation resistance, long-time color retention, lightweight, portability, no toxicity, no harm and the like; the problem that the existing resin specimen cannot perfectly protect the plant pigment can be solved.

The invention discloses a water-based evaporation drying type gravure ink composition applicable to multiple base materials. The water-based evaporation drying type gravure ink composition applicable to multiple base materials comprises the following components in percentage by weight: 20-60% of an ink linking material, 1-30% of a flaky functional material, 0-30% of an alcohol solvent, 0-10% of auxiliaries, 0-0% of a curing agent and the balance of water. The water-based evaporation drying type gravure ink composition applicable to multiple base materials contains no phenyl ketone and no ester solvent, has the characteristics of safety, no toxicity, no harm, noninflammability, non-explosiveness, nearly zero VOC and the like and is beneficial to human health and environmental safety, and defects of water-based ink composition in onboard stability and ink drying property are overcome; and by selecting resin of a specific structure, the problems of the water-based ink composition in the aspects of binding strength on a base material and printing product materialization tolerance are solved, and the ink composition can be applicable to multiple base materials such as paper and plastic.

The invention relates to a biological pesticide. The biological pesticide is characterized by being prepared from the raw materials in percentage by weight: 10-60wt% of cinnamyl aldehyde and toosendan fruit extracts, 8-10wt% of surfactant, 0.01-0.5wt% of chitosan, 10-50wt% of synergist and the balance of 95% ethanol, turpentine oil, lavender essential oil, ageratum oil and purple perilla leaf oil. According to the biological pesticide disclosed by the invention, the cinnamyl aldehyde and toosendan fruit extracts are taken as main active ingredients, so that the biological pesticide has non-toxic and harmless properties and has good volatility, and the disadvantages of pesticide residue increase and ecological environment destruction can be overcome; although the cost of the biological pesticide is slightly higher than that of chemical pesticides currently, the social benefit is better, the environmental pollution is less, and thus, the biological pesticide has a lot of advantages in the long run.

The invention provides an anti-fog self-cleaning film and a method for preparing the same. The film is characterized in that: Fe2O3, SiO2 and TiO2 are mixed to form a ternary inorganic nanometer composite sol according to the molar ratio of (0.1-0.4):(10-40):100, and a water soluble macromolecular substance of which the molecular weight is between 400 and 10,000 is added to the composite sol according to the concentration of (0.1-4.0)g.L. The anti-fog self-cleaning film can achieve the advantages of super-hydrophilicity, strong hydrophilic retention capability, high transmittance, high photocatalytic activity, high capability of adhering to base materials, and good anti-fog self-cleaning effects.

The invention relates to plant-source biopesticide for preventing strawberry diseases. The biopesticide is prepared from 10-60wt% of cinnamyl aldehyde and Szechwan chinaberry fruit extracts as well as allicin and capsaicine, 8-10wt% of surfactant, 8-10wt% of pythium oligandrum, 0.01-0.5wt% of chitosan, 10-50%wt% of synergist and the balance being 95% ethyl alcohol and turpentine as well as lavender essential oil, palchouli oil and perilla oil. The biopesticide takes the cinnamyl aldehyde and cinnamyl aldehyde extracts as main active ingredients, thereby having no toxicity and harm and good volatility and overcoming the defects that pesticide residue is increased and ecological environment is destroyed. Besides, even though the biopesticide is higher than chemical pesticide in cost at present, the biopesticide has many advantages on a long view due to good social benefit and less environmental pollution.

The invention discloses a negative pole of an enzymatic biofuel cell as well as a preparation method and application of the negative pole. The negative pole is prepared by taking carbon paper as an electrode substrate, an enzyme as a catalyst and a carbon nano-tube/cibacron blue composite as an enzyme carrier, wherein the carbon nano-tube/cibacron blue composite is a carbon nano-tube modified by cibacron blue. The negative pole of the enzymatic biofuel cell disclosed by the invention has rich surface active groups which provide rich bonding sites for the load of enzyme, and has favorable conductivity; an enzymatic biofuel cell electrode prepared by the negative pole of the enzymatic biofuel cell can be used for greatly increasing the power density of the enzymatic biofuel cell.

The invention discloses a water-based plastic track and a preparation method thereof. The water-based plastic track comprises an elastic layer and an antiskid layer, wherein the elastic layer is formed by mixing a polymer emulsion and white cement at mass ratio of 1.5-1.75, then adding waste rubber crumbs to the mixture, uniformly stirring the materials and then paving and curing the obtained mixture; the antiskid layer is prepared from a polymer emulsion, white cement, pigments and EPDM (Ethylene-Propylene-Diene Monomer) granules. The water-based plastic track is simple in process and low in cost, and not only has elasticity and skid resistance of a polyurethane rubber track, but also has the advantages of being non-toxic, harmless, excellent in performance, safe, environmentally-friendly and the like.

The invention discloses a preparation method of a far-infrared ceramic liner for an electric rice cooker. According to the preparation process, a low-expansion spodumene-based ceramic liner body is firstly prepared, wherein the ceramic liner meets rapid cooling and rapid heating in the range of 500 DEG C-20 DEG C, and the water absorption rate is less than 0.5%. The preparation process of the ceramic liner body comprises the steps of mixing and ball-milling; mud squeezing; mud stirring; rolling and forming; drying; trimming; and firing, then glaze firing with a low-expansion inner glaze, and coating with an ordinary coating outside to obtain the ceramic liner. The far-infrared ceramic liner for the electric rice cooker, prepared according to the preparation method disclosed by the invention, can be widely used for replacing aluminum liners of the electric rice cookers; the ceramic liner has the advantages that the surface which is in contact with foods is environment-friendly and durable, and the ceramic liner has a far-infrared radiation function after being heated; when the ceramic liner is used for cooking rice and other foods, a certain through heating effect is realized, so that the heating of the rice is uniform and thorough, and the rice has relatively good shape, taste and fragrance.

The invention relates to a preparation method of a carboxymethyl cellulose based reversible photochromic hydrogel. The preparation method comprises the following steps: dissolving carboxymethyl cellulose of different substitution degrees into water to prepare a carboxymethyl cellulose aqueous solution, preparing a phospho-tungstic acid aqueous solution, mixing the phospho-tungstic acid solution and the carboxymethyl cellulose aqueous solution under the condition of continuous stirring, controlling addition manner and dosage of phospho-tungstic acid, and finally stopping stirring and standing for 2h so as to obtain the carboxymethyl cellulose based hydrogel.

The invention relates to a method for synthesizing copper-based perovskite powder by a low-temperature solvent method. The method comprises the following steps: adding CsX and CuX into a polar organicmixed solution, and stirring for 4-6 hours at 40-70 DEG C, wherein the polar organic mixed solution is a mixed solution of N, N-dimethylformamide (DMF)and dimethyl sulfoxide (DMSO), the CsX is cesiumchloride, cesium bromide or cesium iodide, and the CuX is copper chloride, copper bromide or copper iodide. According to the synthesis process, constant-temperature growth on a hot plate is not needed, synthesis is directly conducted on a magnetic stirrer, the synthesis process has the advantages of being short in manufacturing period, low in cost, simple in growth step, environmentally friendlyand the like, and Cs3Cu2X5 powder with high crystallization quality is separated out within 5 hours.

The invention belongs to the technical field of composite materials, and relates to a thermoplastic composite material floor and a preparation method and a preparation apparatus thereof. The thermoplastic composite material floor consists of thermoplastic resin and continuous filaments which are dispersed in the thermoplastic resin in parallel along the horizontal direction of the floor in a lamelleted shape. Compared with the prior art, the preparation method has the advantages that the technology is simple, the operation is easy, the floor can be directly formed, the forming is easy, and the forming period is short; compared with the defects of mutability, easiness in wear and the like of the traditional solid wood floor and wood plastic composite floor, the floor obtained by the preparation method has the advantages that the deformation resistance is more excellent, the permanent deformation does not occur, the durability is better, and the weather ability and the corrosion resistant capacity are better.

The invention discloses a detachable carpet, and belongs to the technical field of carpets. The detachable carpet comprises a base cloth layer. Waterproof layers are arranged on the top and the bottomof the base cloth layer, clamping strips are arranged on the left sides and the right sides of the top and the bottom of the base cloth layer, fixing grooves matched with the clamping strips are formed in the joints of the two sets of waterproof layers and the base cloth layer, clamping blocks are arranged on the left sides and the right sides of the two sets of waterproof layers, and clamping grooves cooperating with the clamping blocks are formed in the joints of the two sets of waterproof layers and the clamping blocks. The polyurethane layers are low in mass and environmentally friendly,and have good waterproof performance, the waterproof layers arranged on the top and the bottom of the base cloth layer can be conveniently detached and manually cleaned, the structural shapes of the waterproof layers cannot be damaged, the original use performance of the waterproof layers is kept, detaching and mounting of the waterproof layers and the base cloth layer are achieved through the cooperation of the clamping strips and the fixing grooves, and the structure can be firmly connected through the cooperation of the clamping blocks and the clamping grooves.

The invention discloses a preparation method and application of a cerium dioxide nanowire, and belongs to the technical field of material preparation and environmental governance. The method comprises the following steps: carrying out a strong alkaline hydrothermal reaction on an aqueous solution of a molybdenum source and an aqueous solution of a cerium source to generate a mixture of a cerium oxide precursor and the molybdenum source, and uniformly mixing the mixture through hydrothermal stirring; and finally, carrying out high-temperature calcination in an air atmosphere to obtain the cerium dioxide nanowire. After cerium dioxide is modified with molybdenum, the morphology of cerium dioxide can be changed, the yield of carbon dioxide can be increased, precious metal can be replaced to achieve the purpose of increasing the yield of carbon dioxide, and the cost is remarkably reduced. The method has the advantages of simple operation, easily available raw materials, low cost, low energy consumption and the like; the stability is good, the activity is high, and the efficiency of photo-thermal catalytic combustion of volatile organic compounds is high.

The invention discloses an environmentally-friendly automobile engine coolant which is prepared from the following raw materials in parts by weight: 30-70 parts of propylene glycol glucoside, 30-70 parts of water, 0.5-0.7 part of sodium hydroxide, 0.4-0.6 part of sodium nitrite, 0.5-0.7 part of sebacic acid and 0.2-0.4 part of benzotriazole. The novel environmentally-friendly automobile engine coolant, disclosed by the invention, is prepared by carrying out chemical reaction on starch and propylene glycol which are utilized as the raw materials in the presence of a catalyst (acid) at a certain temperature, using a generated product (propylene glycol glucoside) as a matrix of a deicing fluid, and preparing a small number of an antirusting agent, an antifouling composition and a foam suppressor. The environmentally-friendly automobile engine coolant adopts the propylene glycol glucoside for the deicing fluid; the propylene glycol glucoside has the advantages of no toxicity, harmlessness, good biodegradability and the like; the propylene glycol glucoside per se also has functions of sterilization and corrosion prevention; and the environmentally-friendly automobile engine coolant is completely environmentally-friendly.

The invention discloses an asphalt flame retardant, a preparation method and application of the asphalt flame retardant. Flame-retardant asphalt is formed by mixing 75-85% of SBS modified asphalt and15-25% of a flame retardant, the flame-retardant asphalt has good flame-retardant performance, an active oxide formed through heating decomposition of a metal hydroxide is a good fireproof material and covers the surface of the asphalt to form an insulation layer, flowing of combustible volatile substances is stopped, the situation is also slowed down that external oxygen permeates into the asphalt, so that a sufficient oxidation reaction of the burning surface is difficultly conducted, and accordingly the flame retardance and smoke inhibition function is achieved; the highest limit oxygen index reaches 29.2%, the synergistic flame retardance efficiency can reach 1.34, the influence on various technical indexes of the asphalt and an asphalt mixed material is small, no poisonous gas is generated, the asphalt flame retardant is safe and environmentally friendly, the production technology is simple, the quality is table, the cost is low, and the asphalt flame retardant has high economic applicability.

The invention relates to a water-based cleaning agent for high-speed railway maintenance. The water-based cleaning agent comprises, by weight, a main material and the balance of water, wherein the main material comprises, by weight, 1-5% of isomeric alcohol polyoxyethylene ether, 1-5% of sodium hydroxide, 1-5% of ethylenediaminetetraacetic acid, 3-5% of a surfactant Berol 226, 2-3% of coconut oilfatty acid diethanolamide, and 3-5% of isohexanediol. The preparation method comprises: dissolving, stirring and standing. According to the present invention, the water-based cleaning agent has advantages of scientific and reasonable components, scientific and reasonable component ratio, high decontamination and cleaning ability, low use cost, non-toxic and harmless raw materials, no irritating odor, no harm to human body, no atmospheric pollution and no environment pollution, and can be widely used for maintenance or flaw detection and equipment maintenance and cleaning of high-speed rail electrical power, bogies, gearboxes, axles and other equipment perennially exposed to wind and sand, salt mist and dampness-heat and humid harsh environments.

The invention discloses a water-retaining agent for bamboo willow in drought regions and relates to the technical field of fast-growing tree planting. The water-retaining agent is prepared from the following raw materials in parts by mass: 50-60 parts of plant starch, 40-45 parts of polyacrylic acid, 20-25 parts of carboxymethyl chitosan, 15-20 parts of montmorillonite, 15-20 parts of nano calcium carbonate, 12-15 parts of gelatin, 10-12 parts of calcium sulfate, 8-10 parts of white carbon black, 5-8 parts of urea, 5-8 parts of phosphorus pentoxide, 2-3 parts of benzoyl peroxide, 30-40 parts of isopropanol and 100-120 parts of water. The water-retaining agent is capable of improving the soil water absorptivity and suitable for the drought regions, and has the water absorption rate within the range from 400 to 450; besides, the water-retaining agent has the characteristics of non-toxicity and innocuousness and automatic degradation, does not cause pollution to plants and soil underground water and is high in safety.