720results about How to "The preparation method is simple and environmentally friendly" patented technology

The invention provides a preparing method of an environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane. The preparing method is characterized by comprisingthe steps of 1, preparing a high-molecular polymer solution with water or environment-friendly alcohols being solvents, adding a corresponding water-soluble or alcohol-soluble water repelling agent and cross-linking agent, and preparing a hydrophobic fiber membrane through an electrostatic spinning technology; 2, conducting aftertreatment on the fiber membrane to trigger a chemical crosslinking reaction between a polymer matrix and the cross-linking agent, reinforcing the water resistance of the fiber membrane and regulating the pore structure of the fiber membrane to obtain the environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane. In the production process, no waste gas, waste water and solid waste are generated, the environment cannot be damaged, the prepared waterproof and moisture-permeable membrane does not contain toxic solvents, and in the actual application, the healthy of a wearer cannot be damaged; the resistance to water pressure of the fiber-based waterproof and moisture-permeable membrane is larger than or equal to 150 kPa, the moisture permeability is larger than or equal to 15,000 g/m<2>/d, the tensile breaking strengthis larger than or equal to 30 MPa, and the environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane has a large application prospect in the field of functional protective clothes.

The invention relates to a preparation method of a titanium dioxide/graphene composite photocatalyst. The invention is to solve the technical problems that titanium dioxide in a titanium dioxide/graphene compound prepared by the traditional method has a large particle size and low photocatalytic efficiency. The preparation method comprises the following steps that: tetrabutyl titanate is added to a graphene oxide dispersion solution, a concentrated acid is added to adjust the acidity after ultrasonic dispersion, and then deionized water is added to continue to carry out ultrasonic treatment to obtain sol; and then the sol is transferred to a hydrothermal reaction kettle to be subjected to hydrothermal reaction, and then is washed and dried to obtain the titanium dioxide/graphene composite photocatalyst. The particle size of the titanium dioxide in the composite photocatalyst provided by the invention is 5 to 10nm, and the composite photocatalyst can be used for visible light catalytic degradation of methyl orange, and the catalytic efficiency can reach 75% within 2 hours. The titanium dioxide/graphene composite material provided by the invention can be used as a photocatalytic material, a solar cell material and a lithium ion battery cathode material.

The invention relates to a flexible resistance type pressure transducer which can be applied to human body pulse detection. Polymer micro-nano fibers prepared by adopting an electrospinning technique are taken as a framework, and graphene is taken as a conductive active layer and coats the outer layer of the framework, so that a sensitive layer of the transducer is formed; and then the sensitive layer is transferred onto a polydimethylsiloxane (PDMS) substrate, and finally another PDMS thin film covers a composite material for encapsulation, so that a device is formed. The device can be arbitrarily made into an n*m transducer array as required, so that the flexible resistance type pressure transducer is made. The flexible resistance type pressure transducer provided by the invention has extremely high sensitivity, extremely high response and restoration speed and stable response performance on a weak pressure and has good detectability on human body pulse.

The invention provides a preparation method and application of a supported metal oxide catalyst for removing ammonia nitrogen in water through catalytic ozonation. The preparation method comprises the steps of impregnating a catalyst carrier subjected to activating treatment in an impregnating solution formed through mixing any two metal salts of cobalt, manganese, cerium, iron, nickel, magnesium and copper for a certain time, then drying, and roasting to obtain the supported metal oxide catalyst. The preparation method is green and environmental-friendly, simple to operate, and easy for industrialization. By applying the supported metal oxide catalyst prepared by the invention, ammonia nitrogen can be converted into nitrogen at the normal temperature and the normal pressure so as to be effectively removed. Co3O4-Al2O3 is adopted as a catalyst for reacting for 6h, and the removal rate of the ammonia nitrogen of 200mg/L of ammonium chloride stimulated wastewater approximates to 100 percent, so that the supported metal oxide catalyst has a better effect on removing the ammonia nitrogen through catalytic ozonation.

The invention discloses a water phase preparation method of a spherical silver nanoparticle with adjustable size, which comprises the following steps of: 10, preparing a silver seed solution : 101, mixing deionized water with a sodium citrate solution, and obtaining a stabilizer solution after stirring; 102, heating the stabilizer solution to the temperature of water bath, adding an AgNO3 solution, and then adding a NaHB4 solution; and 103, utilizing the deionized water to obtain a constant volume after cooling at room temperature, and obtaining the silver seed solution; 20, preparing the spherical silver nanoparticle: 201, adding deionized water to a flask, then adding sodium citrate solution to obtain a reducer solution, and heating the reducer solution to a boiling state; 202, adding the silver seed solution to the reducer solution, and then adding the AgNO3 solution; and 203, cooling at room temperature to obtain the spherical silver nanoparticle. The preparation method can be used for preparing the spherical silver nanoparticle with favorable monodispersity, and the size of the spherical silver nanoparticle can be adjusted.

The invention discloses a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a transparent conductive substrate, a hole transport layer, a decoration layer, a perovskite layer, an electron transport layer, a barrier layer and a metal electrode. The surfaces of PEDOT: PSS, NiOx and the hole transport layer are decorated by ionic liquid based on imidazole, atomic force microscope graphs before and after the decoration are compared, and the decorated surface appearance is more smooth, which is conducive to inhibiting the compounding of dark current. The perovskite layer is a new perovskite material 3MAI: PbAc2.xH2O (x is not smaller than 0 and is not greater than 3), and is prepared by quickly preheating a substrate and heating a perovskite precursor solution, namely instant heating assisted spray coating technology (HASP) at a low temperature (lower than 100 DEG C), which is conducive to increasing the grain size of perovskite and reducing the defects between perovskite grains so as to greatly improve the efficiency of the perovskite battery. The photoelectric conversion efficiency of the final battery device is greater than 19%, the flexible device efficiency is 10.8%, no hysteresis effect is formed, and thus the preparation method has a broad application prospect.

The invention relates to a kind of globe-form cellulose absorbent with iron carrying and its manufacturing and application. The carrying agent of the invention is globe-form cellulose, and the active center is the hydroxide of iron in the specific form, which has the high absorption activity. The manufacturing feature is as follows: dropwise alkali solution tardily into the solution of cellulose bead and molysite; in stirring condition, iron can load the cellulose bead by dispersing and hydrolyzing; after loading repeatedly and frequently, use the alkali solution to stabilize the ferruginous form. The manufacturing method of the absorbent has the advantages of environmental protection, novelty, simplicity and low cost. Moreover, it can remove arsenic, fluorine and other heavy metal with high efficiency and high selectivity, and the absorbent has excellent usage-prospect in nowadays.

The invention provides a sulfur-fixing combustion-supporting high-temperature profile control agent, and a preparation method and application thereof. By taking the total weight of the sulfur-fixing combustion-supporting high-temperature profile control agent as 100%, the profile control agent is prepared from the following raw materials in percentage by weight: 3-5% of soft oil sludge, 2-4% of silicon sludge, 1-2% of low sulfur coal powder, 0.8-1.5% of sodium bentonite, 0.5-1.2% of plant fiber particle, 0.2-0.3% of saltpetre powder, 0.1-0.2% of coal gangue powder, 0.2-0.4% of limestone powder, 0.1-0.2% of polyanionic cellulose, 0.08-0.15% of alpha-sodium olefinsulfonate, 0.1-0.2% of sodium tripolyphosphate and the balance of water. The profile control agent has favorable stratum compatibility, causes no damage to the oil reservoir, does not pollute the stratum, and has favorable temperature tolerance; and meanwhile, the profile control agent has sulfur-fixing and combustion-supporting functions, thereby being completely applicable to a profile control technology for a thick oil fireflood chemical profile control gas injection well.

The invention belongs to the technical field of a cathode material for a lithium primary battery, particularly relates to the field of preparation of the cathode material for a fluorocarbon battery, and in particular to a composite carbon fluoride cathode material for the lithium primary battery, a preparation method and an application thereof. The material is a composite material prepared by ballmilling and mixing a porous carbon fluoride material having a high tap density and a carbon fluoride material having a high graphitization degree and then fluorinating the mixture. The composite material has a carbon content of 38-60%, a fluorine content of 40-62% and a tap density of greater than 0.8g/ml; the mixing mass ratio is in the range of 1:0.1-1:10; and the composite material has high specific surface area, high tap density and high graphitization degree. Due to the high tap density of the material, the overall high volumetric specific energy of the material is guaranteed; through anion diffusion channel composed of porous carbon fluorides, the voltage hysteresis phenomenon at the initial stage of the battery discharge is effectively improved and the overall discharge performance of the material is improved.

The invention relates to preparation of a carboxymethyl cellulose-chitosan composite material and identification of a tryptophan enantiomer by a modified electrode of the composite material through an electrochemical process. The preparation comprises the following steps of: preparing the carboxymethyl cellulose-chitosan composite material; preparing the electrode modified by the carboxymethyl cellulose-chitosan composite material; and identifying the tryptophan enantiomer through the electrochemical process. The preparation and the identification, provided by the invention, have the beneficial effects that the preparation method of the carboxymethyl cellulose-chitosan composite material is simple and environmentally friendly; the electrode modified by the carboxymethyl cellulose-chitosan composite material has a relatively good identification capability on the tryptophan enantiomer. Carboxymethyl cellulose and chitosan have a selectively synergistic effect on the tryptophan enantiomer.

The invention discloses a terylene fabric deepening agent copolymer emulsion and preparation method thereof. Organic silsesquioxane is prepared, epoxy chloro alkyl compound of amino silicone oil is modified, and then the organic silsesquioxane and modified epoxy chloro alkyl compound of amino silicone oil are compound. The organic silsesquioxane with smaller molecular weight and particle size is prepared by using the emulsion polymerisation technology according to the invention, and the silicon content in the object is high, and the silicon one of the main component of the deepening agent, and the preparation method is environmental protection without pollution, and the epoxy chloro alkyl compound of amino silicone oil containing double-amino with suitable molecular weight is appropriately modified, and a epoxide group is introduced, and after the fabric is processed, the hydrophility keeps unchangeable. The invention has an obvious color increasing effect, and after the fabric is treated by the deepening agent, no residual harmful substances are on the fabric surface, so the product belongs to the green environmental protection finishing agent.

The invention discloses a porous carbon, and a preparation method and applications thereof. The preparation method of the porous carbon comprises the following steps: (1) under the non-oxidizing condition, calcining at least one of alginic acid, sodium alginate, kalium alginate, lithium alginate, magnesium alginate and calcium alginate to obtain the porous carbon precursor; (2) treating the porous carbon precursor, which is obtained in step (1), with water or acid solution to obtain wet porous carbon; and (3) drying the wet porous carbon obtained in step (2) to obtain porous carbon. When the porous carbon is used as an electrode material for electrochemical capacitors, due to abundant multilevel pore structures and oxygen functional groups, the porous carbon can fully utilize the surface area in the structures and provide additional pseudo capacitance, so that the porous carbon has the advantages of higher capacity, energy density, power density and electrochemical stability. The preparation method is green and environment-friendly, and is very suitable for large-scale production.

The invention discloses a preparation method for a silicon-carbon composite negative electrode material. The preparation method comprises the steps of performing dispersing on nanometer silicon, graphite and an organic matter separately and mixing in proportion; next, performing heating and drying and heating until the temperature reaches an organic matter softening point temperature or above, and performing fusing and binding and low-temperature carbonization to obtain an organic matter cracked carbon-coated primary coating material; performing dispersing on the organic matter and the primary coating material separately and mixing in proportion; and next, performing heating and drying and heating until the temperature reaches an organic matter softening point temperature or above, and performing fusing and coating and high-temperature carbonization to obtain an organic matter cracked carbon-coated secondary coating material, namely the silicon-carbon composite negative electrode material provided by the invention. The initial reversible capacity of the negative electrode material prepared by the method can reach 649mAh/g, and the capacity retention ratio after 50 cycles can be maintained at 85.36%, and quite excellent cycling performance is shown; and in addition, the preparation method has a simple and environment-friendly process, low energy loss, rich silicon and graphite raw material resource, low cost and high safety, and is suitable for industrial production and use.

The invention discloses self-healing hydrogel capable of promoting wound healing and cancer therapy and preparation method thereof. The self-healing hydrogel is FCB hydrogel which is prepared by Schiff base reaction among a polyether-cationic polymer water solution with a mass concentration as 8% to 50%, a polyether-p-hydroxy benzaldehyde water solution with a mass concentration as 10% to 40% anda dopamine modified biological active inorganic material water solution with a mass concentration as 2% to 10%, the water solutions are mixed according to a volume ratio of (22 to 28) to (7 to 10) to(4 to 10), the F is polyether-cationic polymer, the C is polyether-p-hydroxy benzaldehyde, and the B is a dopamine modified biological active inorganic material. The self-healing hydrogel has good biological compatibility, better photo-thermal character and stronger antibacterial property; under laser radiation, the self-healing hydrogel can effectively inhibit animal cancer growth; furthermore, the self-healing hydrogel can promote mouse skin damage repair. The preparation method has the advantages of simpleness, no organic solvent residue, environment-friendly synthesizing method, convenience in operation and low raw material cost.

The invention belongs to the technical field of synthesis of inorganic porous materials and particularly relates to a preparation method of a house-of-cards-like hierarchical porous ZSM-5 molecular sieve which is low in cost, environment-friendly and fast. The preparation method comprises the following steps: adding an inorganic alkali source and an aluminum source into deionized water, and adding a proper amount of N-methyl-2-pyrrolidone (NMP); then, slowly adding a silicon source; fully and uniformly stirring; and synthesizing a house-of-cards-like hierarchical porous HCL-ZSM-5 molecular sieve by a one-step hydrothermal method. The molecular sieve has remarkable hierarchical porous structural characteristics, is large in external surface area, strong in acidity and good in stability, and has wide application prospects in the fields of catalysis, adsorption, separation and the like. In an alkaline ZSM-5 synthetic system without an organic template, by using non-toxic and cheap NMP as a structural guiding agent which is used for replacing an expensive macromolecular organic template, the method is an economic, efficient and environment-friendly synthetic method which is expected to be applied to large-scale commercial production.

The invention discloses a graphene and ferrum diselenide composite material and a method for preparing the same. The method for preparing comprises the following steps: selenium-containing inorganic salt and ferrum-containing inorganic salt are put into a stainless steel reactor; hydrazine hydrate and source graphene solution are mixed together and stirred uniformly to form an ink black solution to be added into the reactor, and the reactor is closed so as to carry out reaction; and after the reaction is completed, natural cooling is carried out, reaction precipitate is subjected to repeated washing and suction filtering through distilled water and absolute ethyl alcohol, and after the drying, the product is collected and stored in a drying device. According to the prepared graphene and ferrum diselenide composite material, a graphene sheet wraps ferrum diselenide nanoparticles, the ferrum diselenide is tightly combined with the graphene sheet, so that high specific surface area and excellent magnetic performance are obtained. The method adopts a simple hydrothermal method, the graphene reduction oxide and the composite preparation of the praphene and the ferrum diselenide can be synchronously carried out, and the method has the advantages of simplicity in technology, low reaction temperature, low cost, green, controllability and applicability for industrial production.

A preparation method of a covalent triazine framework material with rich defects comprises the following steps: mixing 1,4-dicyanobenzene with 4,4-biphenyldicarbonitrile, adding trifluoromethanesulfonic acid, performing stirring in a -5-5 DEG C environment under the protection of an inert gas for 1-2 h, raising the temperature to 80-120 DEG C, keeping the temperature for 10-30 min to obtain a transparent solid substance, grinding the transparent solid substance by a mortar, washing the ground solid with ethanol and water, and drying the washed solid to obtain the material. A manner for introducing a defect into a covalent triazine framework is provided by the invention to make the covalent triazine framework have rich adsorption active site, so the obtained material can be used as a highly active adsorbent. The material used as the adsorbent has the advantages of green and environmentally friendly preparation method and low cost; and the material contains rich defect sites as high energy sites for adsorbing pollutants, so the covalent triazine framework can adsorb aromatic substances at a very high adsorption rate and a very high adsorption capacity.

The invention provides a mercury-free catalyst applied to stationery bed for preparing chloroethylene and a preparation method thereof. The catalyst takes activated carbon, pretreated by hydrochloric acid or sodium hydroxide water solution, as a carrier, and gold trichloride and ferric chloride as active components, and compared with the ordinary mercury-free catalyst, according to the preparation method of the catalyst, the gold trichloride is guaranteed not to be reduced and can be uniformly and firmly loaded on the surface of the activated carbon carrier by replacing nitrohydrochloric acid in the preparation of the catalyst with hydrogen peroxide and taking other metal chloride, capable of promoting the decomposition of the hydrogen peroxide, as auxiliaries. The catalyst has high activity and selectivity in the reaction of preparing chloroethylene in the stationery bed through acetylene hydrochlorination, and the preparation method is simple and efficient, and green and environment-friendly, and has important practical significance in the industrial application.