41results about How to "Aggregation tight" patented technology

The invention discloses a method for preparing a nanofiber-based composite nanofiltration membrane by low-temperature reverse interface polymerization, which is characterized in that it comprises: electrospinning a polymer solution to obtain a nanofiber non-woven fabric, which is obtained after cold pressing The nanofiber porous base membrane; the surface of the nanofiber porous base membrane is infiltrated with a low-temperature oil phase monomer solution; then the water phase monomer solution is added for reverse interfacial polymerization reaction; the nanofiber base composite nanofiltration membrane is obtained after heat treatment. The invention reduces the volatilization rate of the oil phase under low temperature conditions by controlling the temperature of the oil phase solution, provides a complete and uniform reaction interface for the reverse interface polymerization, and overcomes the skin layer inherent in the reverse interface polymerization caused by the rapid volatilization of the oil phase Defects and infiltration problems, the thickness, uniformity and density of the functional barrier layer are optimized by controlling the temperature of the oil phase solution and the polymerization parameters of the reverse interface, thereby enhancing the nanofiltration performance of the composite membrane.

The invention relates to a starch and polylactic acid composite material and a preparation method thereof. The composite material comprises, by weight, 20 to 75 parts of modified starch, 10 to 65 parts of polylactic resins, 2 to 10 parts of hydroxy-terminated lactic acid oligomer with molecular weight of 800 to 2000, 1 to 10 parts of plasticizers, 0.1 to 1.0 part of aliphatic chain extenders, 0.5 to 2 parts of talcum powders and 0.1 to 3 parts of auxiliaries. The preparation method includes that firstly the modified starch, the polylactic acids, the hydroxy-terminated lactic acid oligomer, the plasticizers, the talcum powders, lubricating agents and coupling agents are blended together in a homogenizer to obtain a blend, and then a mixed material of the blend and the chain extenders is added in a twin-screw extruder to be subjected to melt extrusion, cooling and granulation to obtain the starch and polylactic acid composite material. The starch and polylactic acid composite material has the advantages that the compatibility, toughness and heat resistance are good, the cost is low, the biodegradation can be completely achieved, the preparation technique process is simple, the 'three wastes' emission is absent, and the mass production can be achieved.

The invention discloses PVC (polyvinyl chloride) foamed artificial leather and a preparation method thereof. The PVC foamed artificial leather comprises a fabric base material, a foaming layer and a surface layer which are attached from inside to outside sequentially, wherein the foaming layer comprises components in parts by weight as follows: 95-105 parts of PVC resin, 75-85 parts of filling powder, 75-85 parts of a plasticizer, 3.5-4.0 parts of a stabilizer, 4.5-5.5 parts of a foaming agent and 9.5-10.5 parts of masterbatch; the surface layer comprises components in parts by weight as follows: 65-75 parts of PVC resin, 6-8 parts of filling powder, 46-52 parts of a plasticizer, 1.5-3 parts of a stabilizer and 4.5-5.5 parts of masterbatch. The preparation method comprises steps as follows: (1), blending; (2), mixing, open milling and filtering; (3), calendering attachment; (4), cooling; (5), foaming; (6), embossing, cooling and rolling-up to obtain a finished PVC foamed artificial leather product. The artificial leather prepared with the method feels good, and is good in texture, high in breathability and good in wear resistance.

The invention relates to sound insulating glass and a preparation method thereof, in particular to sound insulating PVB (polyvinyl butyral) laminated glass and a preparation method thereof. The sound insulating PVB laminated glass comprises a first glass substrate, a second glass substrate, a PVB film between the first glass substrate and the second glass substrate as well as polystyrene films located between the first glass substrate and the PVB film as well as between the second glass substrate and the PVB film, wherein the first glass substrate and the second glass substrate are arranged vertically. The preparation method of the sound insulating PVB laminated glass comprises the following steps: (1) cleaning of the glass substrate; (2) preparation of the polystyrene films; (3) combining operation: the PVB film is arranged in a combining chamber for combination of the glass substrates, the PVB film and the polystyrene films; (4) prepressing for exhausting; (5) high-pressure molding. The prepared PVB laminated glass has good mechanical property, impact resistance and good sound insulating effect, the PVB film cannot fall off the glass when the laminated glass meets external impact or the external environmental temperature changes acutely, and the service life is long.

The invention discloses a method for carrying out microcontact printing by employing a plane conjugate phthalocyanine-porphyrin coordination compound. The method comprises the following specific steps: with a dichloromethane solution of 5,10,15,20-parachloro-phenyl porphyrin zinc-hexabutoxyphthalocyanine zinc as a printing agent for microcontact printing, transferring a pattern of a PDMS stamp to a polymethyl methacrylate substrate, and adsorbing reduced copper on the substrate to obtain a fine metal pattern. A metal pattern is prepared by taking the dichloromethane solution of 5,10,15,20-parachloro-phenyl porphyrin zinc-hexabutoxyphthalocyanine zinc as microcontact printing ink on the surface of the polymethyl methacrylate substrate which is commonly used in the electron industry, so that the method is available in raw materials, low in cost and stable, and has great potential in industrial application, and a new idea is provided for the microcontact printing industry.

The invention discloses a video positioning method, device and electronic equipment. Wherein, the method includes: acquiring video and sentences; performing feature extraction on the video and the sentence respectively to obtain corresponding video segment features and word features; fusing the video segment features and the word features to obtain fusion features ; Aggregating and associating the fusion feature layer by layer based on time series through a time series convolutional neural network to obtain a multi-layer time series convolution feature map; performing semantic modulation on each layer feature map in the multi-layer time series convolution feature map to obtain modulation After the feature map, and perform temporal convolution operation on the modulated feature map to obtain the target video segment related to the semantics of the sentence. Through the present invention, it is possible to quickly and accurately locate the target video segment related to the semantics of the input sentence.

The invention aims to solve the problems in the prior art, provide a PVC (Poly Vinyl Chloride) external lubricant and a manufacturing process thereof, reduce the reaction temperature in the machining process and optimize the proportioning of a product. For fulfilling the aims, the manufacturing process comprises the following steps of: firstly, carrying out recovery processing on waste liquor generated in the chemical industry to obtain fumaric acid; in the machining process, firstly, using the fumaric acid as mother liquor according to a certain ratio, then adding polyatomic alcohol according to the ratio, adding pentaerythritol proportioned according to the ratio after sufficiently stirring, and finally, adding stearic acid to carry out esterification; then carrying out polymerization at a high temperature of 150 DEG C to 160 DEG C; after polymerization, carrying out vacuum dealcoholization at a high temperature of 200 DEG C; and slicing after cooling, wherein in the whole machining process, no catalyst is added. The manufacturing process has the beneficial effects of low reaction temperature, good polymerization effect and high finished product conversion rate due to the adoption of the technical scheme.

The invention relates to a preparation method of high color fastness water-based acrylate resin color paste, resin color paste and its application and use method. The water-based acrylate resin color paste is a core-shell structure polymer, and the core polymer is acrylate The composition of polymer and pigment, the shell polymer is a water-based acrylate polymer synthesized by emulsion polymerization. In the present invention, by adding pigments during the reaction process, the molecular chains and pigments in the polymer solution synthesized by solution polymerization are more uniformly dispersed and combined more closely, and the pigments are evenly dispersed and wrapped in the latex particles after the polymer self-emulsifies to form latex particles. It reduces the uneven dispersion of pigments and the phase separation caused by aggregation during the film-forming process of the slurry, and greatly improves the color fastness of the water-based acrylic resin colorant.

The invention belongs to the field of inorganic mineral powder papermaking, and in particular relates to a preparation method of network gel modified talcum powder specially used for papermaking. It is characterized in that the flexible nano talc powder is formed by interspersing talcum powder, surface modifier and three-dimensional polymer network gel according to the weight ratio of 100:1~5:10~20. The modified talc powder uses extrusion technology to make the surface modifier penetrate into the layered structure of the talc powder, improve the hydrophilicity and surface activity of the talc powder, and polymerize with the flexible monomer under the action of the crosslinking agent to form a Three-dimensional network polymer gel, the network gel is interspersed in the layered structure of the modified talc powder, which increases the strength and toughness of the talc powder, and at the same time increases the active groups on the surface of the modified talc powder, improving the performance of the modified talc powder. Excellent softness and dispersibility, increase the bonding force between modified talcum powder and plant fiber. When the modified talcum powder of the present invention is used in papermaking, the softness of paper can be obviously improved, and the paper has good hand feeling, light weight and is easy to print.

The present invention discloses surface-organically-modified boron nitride powder, wherein a hydantoin epoxy resin cross-linked polymerization product layer is coated on the particle surface, the hydantoin epoxy resin cross-linked polymerization product content in the surface-organically-modified boron nitride powder is 5-10 wt.%, and the raw materials for preparing the surface-organically-modified boron nitride powder comprise 20-30 wt.% of boron nitride, 1-3 wt.% of a hydantoin epoxy resin, 0.1-2 wt.% of an organic amine curing agent, and the balance of water. According to the present invention, the surface-organically-modified boron nitride powder has characteristics of good compatibility with polymer substrates and easy dispersion in the substrate, and can maintain good construction or processing fluidity under the high filling rate of 47.5 wt.%, and the thermal conductivity of the prepared epoxy composite material is up to 2.42 W / m.K.

The invention aims at solving problems in prior arts, and provides a PVC external lubricant and a production method thereof. According to the invention, a reaction temperature in a processing process is reduced, and a product proportion is optimized. For reaching the purpose, the method comprises steps that: waste liquid produced from chemical industries is recovered and treated, such that fumaric acid is obtained; during processing, fumaric acid is selected as mother liquor according to a certain proportion; polyhydric alcohol is added according to a certain proportion, and the mixture is sufficiently stirred; pentaerythritol with a certain proportion is added; stearic acid is added for esterification; high temperature polymerization is carried out at a temperature of 150 DEG C to 160 DEG C; the polymerized material is delivered through a vacuum dealcoholizing process at a temperature of 200 DEG C; the obtained material is cooled and sliced. No catalyst is added during the whole processing process. The invention is advantaged in that: with the technical scheme, the reaction temperature is low, the polymerization effect is good, and a finished product conversion rate is high.