44results about How to "The preparation process is green and pollution-free" patented technology

The invention provides a continuous cellulose aerogel fiber and a preparation method thereof. The preparation method comprises the following steps: dispersing cellulose into a dispersing agent so as to obtain a spinning stock solution; extruding the spinning stock solution into a coagulating bath for wet-method spinning so as to obtain cellulose aerogel fiber; winding the cellulose aerogel fiber in the coagulating bath, and soaking into an aging liquid for aging; washing the aged cellulose aerogel fiber till the pH is neutral, and drying, so as to obtain the continuous cellulose aerogel fiber. The preparation method provided by the invention has the characteristics that raw materials are cheap and easy to obtain, the preparation process is simple, green and pollution-free, the continuous cellulose aerogel fiber is good is spinnability, and the problem that cellulose aerogel is hard to spin into fiber is solved. The diameter of the cellulose aerogel fiber provided by the invention is smaller than 120 [mu]m, the cellulose aerogel fiber has the characteristics of high specific surface area (greater than or equal to 88m<2>/g), high porosity (greater than or equal to 85%), and low density (less than or equal to 0.2/cm<3>), meanwhile the fiber specific surface area can be adjusted, and the cellulose aerogel fiber can be used in fields such as functional clothes, sensing, catalyst loading and adsorption filtration, cosmetics and biological treatment.

The invention relates to the technical field of lithium ion battery materials, particularly to a preparation method and uses of a starch-based composite hard carbon negative electrode material. The preparation steps comprise: (1) carrying out two-step carbonizing to obtain starch-based hard carbon; (2) preparing a carbon precursor through a liquid-phase immersion method; (3) carrying out high-temperature carbonization; and (4) screening, and grading. Compared to the method in the prior art, the method of the present invention has the following advantages that the raw material source is common, the cost is low, no organic solvent is used, toxic and harmful waste residue and tail gas are not generated, the preparation process is environmentally friendly and pollution-free, and the prepared material has the first discharge capacity of more than 450 mAh/g and the first charge and discharge efficiency of more than 80%, has advantages of good electrochemical performance, good cycle performance, good charge and discharge performance at high current, good safety, good adaptability to electrolytes and other additives and stable property, wherein the difference between batches almost does not exist.

The invention discloses an OFET (Organic Field Effect Transistor) ammonia gas sensor containing a functional insulation layer. The OFET ammonia gas sensor comprises a substrate, an insulation layer a, the functional insulation layer, an insulation layer b and an organic semiconductor layer which are sequentially arranged from bottom to top, wherein the organic semiconductor layer is provided with a source electrode and a drain electrode; a gate electrode is arranged between the substrate and the insulation layer a; the insulation layer a and the insulation layer b are formed by polymer insulation materials which do not contain hydroxyl; the functional insulation layer is formed by a polymer insulation material which contains the hydroxyl. According to the OFET ammonia gas sensor disclosed by the invention, a functional insulation layer material containing the hydroxyl is introduced between two insulation layers, so that the gas sensing property of an OFET is increased; -OH contained in the hydroxyl in the functional insulation layer can be subjected to reversion when ammonia gas molecules permeate into an interface of the insulation layers/the organic semiconductor layer, so that hole charges in corresponding number can be induced, parameters of saturation current, a migration rate and the like of devices are enabled to change, and detection on ammonia gas can be realized.

The invention belongs to the technical field of a lithium ion battery, and particularly relates to a method for activating and improving surface loading quantity of a nanometer silicon negative electrode of a lithium ion battery by employing a sulfur template and hydrogen peroxide. The method comprises the following steps of adding a sulfur-containing substance and an acid into a graphene dispersion liquid, and performing full stirring to obtain a mixed dispersion liquid; adding nanometer silicon particles into absolute ethyl alcohol, and performing ultrasound to obtain a uniform nanometer silicon dispersion liquid; mixing the two dispersion liquids, performing ultrasound again, adding the two dispersion liquids and the hydrogen peroxide into a hydrothermal reaction kettle for hydrothermalreaction to obtain hydrogel; fully immersing the hydrogel, removing impurity, and removing moisture; and performing desulfuration to obtain a three-dimensional porous graphene-silicon macro body. Gaps are introduced to sheet layers in a three-dimensional graphene network, holes are etched in the sheet layers, on one hand, the electrode expansion is relieved, and high density of the active material is maintained; and on the other hand, smooth ion transmission is favorably ensured under the condition that a thick-density electrode is fabricated from the active material, and the improvement of volume performance and surface capacity of a silicon negative electrode is finally achieved.

The invention belongs to the technical field of energy storage, and particularly relates to a preparation method of a graphene-based compact composite material. The preparation method at least comprises the following steps of adding a dispersing liquid of an insoluble constituent into a graphene dispersing liquid, and performing full stirring to obtain a first mixed dispersing liquid; adding a reduction constituent, and performing full stirring to obtain a second mixed dispersing liquid; adding to a hydrothermal reaction kettle for hydrothermal reaction to obtain hydrogel; fully immersing thehydrogel in deionized water, removing impurity, performing evaporation, drying and moisture removal to obtain a product to be processed; and performing high-temperature thermal processing, and furtherremoving an oxygen-containing functional group to obtain the three-dimensional compact composite material. The pre-arrangement effect of the insoluble constituent during the rapid and compact formation process of a graphene network is promoted by the reduction constituent, gaps among other insoluble constituent particles are reduced by a shrinkage effect of the three-dimensional graphene networkduring the solvent removal process, material compactness is achieved, so that the composite material with relatively high density is obtained.

The invention discloses a Ru/TiO2 catalyst for preparing cyclohexene through benzene selective hydrogenation and a preparation method of the Ru/TiO2 catalyst. The preparation method comprises the steps that firstly, a precursor of an active component Ru is introduced to the surface of TiO2 through an impregnation method, then a reducing agent is added for full reacting, centrifugal washing and drying are conducted, and thus the Ru/TiO2 catalyst is prepared. The prepared Ru/TiO2 catalyst has the outstanding advantages that the preparation steps are simple, by regulating and controlling the phase and the texture property of a TiO2 carrier, Ru nano particles in the catalyst are evenly distributed on the surface of the TiO2, the Ru particle size is controlled to be about 4 nm, and the Ru/TiO2catalyst is used for a reaction for cyclohexene preparation through selective hydrogenation and has the advantages of high conversion rate and good cyclohexene selectivity.

The invention discloses a method for preparing a biomass base film by taking strip-shaped graphene oxide as a binder, and belongs to the technical field of flexible materials. The preparation method comprises the following steps: by taking one-dimensional tubular biomass as a carbon source, carrying out carbonization calcination, activation calcination and hydrothermal oxidation to obtain a biomass carbon tube material, and carrying out space self-assembly and reduction treatment on the biomass carbon tube material by taking a small amount of strip-shaped graphene oxide as a binder to obtain the biomass carbon-based composite film. According to the prepared composite film, graphene agglomeration is hindered by utilizing one-dimensional tubular fibers while an interlayer rapid ion transmission channel is constructed for a flexible supercapacitor electrode so as to achieve the integration of functions of a 3D ion diffusion channel, an overall conductive network, an energy storage space and the like, so that the electrochemical performance of the flexible supercapacitor can be effectively improved.

The invention discloses a preparation method and a characterization method of paraffin/silicone rubber microencapsulated phase change materials. The paraffin/silicone rubber microencapsulated phase change materials are characterized by comprising composite materials composed of paraffin as core materials and silicone rubber as wall materials. According to the preparation method and the characterization method of the paraffin/silicone rubber microencapsulated phase change materials, the thermal insulation function of the materials can be achieved, moreover, the preparation cost is low, the process is simple, and the preparation process is green and non-polluting; the preparation method and the characterization method have broad application prospects in building materials and the other thermal insulation materials.

The invention discloses a method for preparing alginate liquid crystalline phases, which comprises following steps: electrolyte is added into distilled water firstly, is fully stirred to completely dissolve, and is prepared to be a certain concentration of electrolyte solution. A certain amount of sodium alginate powder is weighted to be added into the prepared electrolyte solution, the mass percentage of alginate is 0.2%-70% in the mixed solution, and the mixed solution is stirred in room temperature for 5 min-20 h, then is stirred in a 20-70 DEG C water bath kettle for 5min-10h, phases are separated for 1-12h, the mixed solution can be separated to be an upper and a lower phases, and the lower phase is taken out to observe in an orthogonal polarization microscope to have an obvious bright field, and has strong anisotropy. The method for preparing alginate liquid crystalline phases forms liquid crystalline phases by utilizing the alginate and electrolytes to affect with each other, is simple and convenient, and enables anisotropy of prepared liquid crystalline phases to be obvious.

The invention provides a multi-arc bottomed metalized magnetic core. The multi-arc bottomed metalized magnetic core comprises a magnetic core, a metal film is formed on an electrode region of the magnetic core, the metal film comprises a multi-arc bottoming layer, a first plating layer and a second plating layer; the multi-arc bottoming layer is a titanium layer, a chromium layer, an aluminum layer or a nickel-chromium alloy layer; the first plating layer comprises n layers of first metal layers and n-1 layers of second metal layers in alternate arrangement; the material of each of the first metal layer and the second metal layer is independently selected from one or multiple of nickel-copper alloy, the nickel-vanadium alloy, silver, copper, ferric-nickel-copper alloy, and the first metallayer and the second metal layer are made of different materials, n is the integer from 2-8, and the second plating layer is a silver layer and a tin layer. The multi-arc bottomed metalized magnetic core is prepared from multi-arc bottoming and magnetron sputtering; the film is high in density, good in strength and soldering resistance, and good in adhesive strength; the multilayer structure design can reduce the film layer stress and improve the bonding force strength, and the preparation process is green, environment-friendly and pollution-free. The invention further provides a preparation method of the multi-arc bottomed metalized magnetic core and a chip inductor.

The invention belongs to the field of solar cells, and discloses a D-D-pi-A structure photosensitive dye taking carbazole and triphenylamine as two-stage electron donors as well as a preparation method and application thereof. The photosensitive dye takes carbazole and triphenylamine as two-stage electron donors, a furan group or a benzene ring group as a pi conjugate bridge, and a cyanoacetic acid group as an electron acceptor. The photosensitive dye is used for preparing a dye-sensitized solar cell. The photosensitive dye is stable in structure, the absorption spectrum of the dye can be effectively broadened, and the photoelectric conversion efficiency of the dye is improved. The preparation method is simple, the process is easy to control, the raw materials are wide in source and low inprice, the preparation process is environmentally friendly and free of pollution, and the obtained photosensitive dye is high in purity and yield and suitable for industrial production. The photosensitive dye provided by the invention is used for preparing a photosensitized solar cell.

The invention discloses a preparation method and application of an amphiphilic graphene oxide thick oil viscosity reducer, and the amphiphilic graphene oxide thick oil viscosity reducer is obtained by reacting a mixture containing graphene oxide, a hydrophobic modifier, a coupling agent and a template agent. The amphiphilic graphene oxide thick oil viscosity reducer is prepared by modifying graphene oxide with a hydrophobic modifier, so that the amphiphilic graphene oxide thick oil viscosity reducer is hydrophilic on one side and oleophylic on the other side, has the advantages of an oil-soluble viscosity reducer and a water-soluble viscosity reducer, overcomes the defects of the oil-soluble viscosity reducer and the water-soluble viscosity reducer, and is wider in application.

The invention provides an amur honeysuckle fruit pigment acid-base indicator and a preparation method thereof. The amur honeysuckle fruit pigment acid-base indicator shows different colors under different acidity conditions, wherein the red color is shown when the pH value is 1-4, the yellow color is shown when the pH value is 5-6, the green color is shown when the pH value is 7-8, the yellow-green color is shown when the pH value is 9-12, and the yellow-brown color is shown when the pH value is 13-14. By making full use of amur honeysuckle fruits, the preparation method is green and environmentally friendly, the preparation process is simple, the raw materials are easy to obtain, and the color change of the acid-base indicator is obvious and easy to distinguish, so as to solve the problem in the prior art of being not conducive to judgment and observation since the color changes of the acid-base indicator are not rich enough and the color variation is minor.

The invention belongs to the technical field of plant protection, and concretely relates to a preparation method and a use of organic metal complex crystals. The organic metal complex crystals are prepared from 2,2'-bis(ortho-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, glycine and acetylacetone metal salt. The organic metal complex crystals have a crop disease control effect, and is especially used for controlling Botrytis cintrea, Colletotrichum nicotianae, cotton wilt fusarium, Physalospora piricola and Bipolaria maydis.

The invention relates to the technical field of catalysts, in particular to an Al-P-O series catalyst as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing a water-soluble aluminum salt, a water-soluble phosphorus-containing compound, silicon dioxide microspheres, an organic complexing agent, a pH regulator and water to obtain a mixed solution, aging the mixed solution, and drying a solid product obtained by aging to obtain a catalyst precursor, wherein the molar ratio of phosphorus element to aluminum element in the mixed solution is less than or equal to 2: 1, the pH value of the mixed solution is 5.5-6, and the silicon dioxide microspheres are in an amorphous state; and roasting the solid precursor to remove the organic complexing agent so as to obtain the Al-P-O series catalyst. The Al-P-O series catalyst provided by the invention has the advantages of high catalytic activity, high target product selectivity, high catalytic reaction stability and industrial application prospect.