41results about How to "Aggregation tight" patented technology

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.

A nano-class composite nylon material is prepared through mixing one or more nylon monomers in fused state with one on more nano inorganic material, dewatering, and anionic polymerizing under existance of alkaline catalyst and cocatalyst. Its advantages are high strength, rigidity and size stability, and simple process.

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 discloses a video positioning method and device and electronic equipment. The method comprises the steps of obtaining a video and a statement; performing feature extraction on the videoand the statement respectively to obtain corresponding video clip features and word features; fusing the video clip features and the word features to obtain fusion features; aggregating and associating the fusion features layer by layer based on a time sequence through a time sequence convolutional neural network to obtain a multi-layer time sequence convolutional feature map; and performing semantic modulation on each layer of feature map in the multi-layer time sequence convolution feature map to obtain a modulated feature map, and performing time sequence convolution operation on the modulated feature map to obtain a target video clip related to semantics of the statement. According to the method and the device, the target video clip related to semanteme of the input statement can be quickly and accurately positioned.

The invention discloses a preparation method of transmission electron microscope samples of atmospheric particulates, and belongs to the preparation method of atmospheric particulate samples. The atmospheric particulates are collected by a sampler, a collecting membrane with sample particles is immersed in an ethanol solution and enriched sample particles are obtained through ultrasound concussion; enriched sample particles are subjected to gradient penetration of a mixture of ethanol and an embedding medium under a certain vacuum degree, and then polymerized for 48 hours at the temperature of 60 DEG C after stood for 8 hours under vacuum, and embedding blocks of the polymerized particulates are subjected to block repairing and slicing, and finally ultrathin section samples of the atmospheric particulates are obtained. The preparation method of the transmission electron microscope samples of the atmospheric particulates disclosed by the invention effectively eliminates residual gases among the particulates in the embedding process, and better fixes structure states of the particulates. The observation of a transmission electron microscope on the section samples of the atmospheric particulates can provide a technical way for a formation mechanism of the internal structures of the atmospheric particulates, and inference research of a formation reaction mechanism of the atmospheric particulates. The method is applicable to atmospheric particulates, coal particulates and the like.

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 discloses a combined type magnetic frame. The combined type magnetic frame provided by the invention comprises a magnet frame and a micro test tube frame. The magnet frame mainly comprises a magnet frame base and a column body part which is perpendicularly fixed to the magnet frame base and internally provided with magnets. The micro test tube frame mainly comprises a micro test tube frame flat plate and a column body part which is perpendicularly fixed to the lower end of the micro test tube frame flat plate and provided with a cavity structure. The column body part which is provided with the cavity structure is matched with the column body part which is perpendicularly fixed to the magnet frame base and internally provided with the magnets, so that separation and combination of the magnet frame and the micro test tube frame are achieved. The micro test tube frame flat plate is provided with micro test tube holes used for holding micro test tubes. The micro test tube holes are internally provided with flanges and boss bodies. Through the combined type magnetic frame provided by the invention, a user can conduct overturning, inclining, rotating, vibrating and other operations with the micro test tubes and the magnetic frame as a whole, and the work efficiency and the operation uniformity of a micro test tube chamber are improved exponentially.

The invention relates to a preparation method of high-color-fastness water-based acrylate resin color paste, the resin color paste, and application and the use method of the resin color paste. The water-based acrylate resin color paste is a polymer with a core-shell structure, wherein an inner core polymer is a composition of an acrylate polymer and a pigment, and a shell polymer is a water-basedacrylate polymer synthesized in an emulsion polymerization manner. According to the invention, the pigment is added in a reaction process, a molecular chain in a polymer solution synthesized by solution polymerization and the pigment are dispersed more uniformly and combined more tightly, and after the polymer is self-emulsified to form emulsion particles, the pigment is uniformly dispersed and wrapped in the emulsion particles; and thus, the situation of phase separation caused by nonuniform pigment dispersion and pigment aggregation in the film forming process of the paste is reduced, and the color fastness of the water-based acrylate resin color paste is greatly improved.

The invention relates to the field of an antirust paint, in particular to an antirust paint added with magnet powder for food production machine for a food production machine. The antirust paint is prepared from the following raw materials in parts by weight: 30 to 32 parts of acrylic emulsion, 4 to 6 parts of dimethyl silicone oil, 6 to 10 parts of oxaloacetic acid, 4 to 6 parts of isocitric acid, 4 to 6 parts of cyclohexanamine benzoate, 10 to 16 parts of boric acid, 1 to 2 parts of medical chalk ash, 1 to 2 parts of dibenzothiazyl disulfide, 1.5 to 1.5 parts of catechin and 3 to 5 parts of modified magnet powder. The antirust paint provided by the invention has the advantages of non-toxic and antibacterial properties, acid and alkali and salt spray corrosion resistance, low kinematic viscosity, close polymerization between raw materials, very high surface hardness after drying, scratch and impact resistance, oil and water immersion resistance, no peeling and bubbling in long-term oil and water immersion, and service life 3 to 4 years longer than the ordinary antirust paint.

The invention provides an antibacterial wood-like board for indoor decoration and a preparation method. The antibacterial wood-like board is prepared from an antibacterial wood-like layer formed on the surface of a polypropylene substrate through surface co-extrusion, the polypropylene substrate is prepared from polypropylene matrix resin, a coupling agent, a bulking agent and an antioxidant through mixing and extrusion, and the antibacterial wood-like layer is prepared as follows: coating natural clinoptilolite with graphene oxide, adding the coated natural clinoptilolite and hydrazine hydrate to a silver salt solution to react to prepare antibacterial filler, then, mixing the antibacterial filler with ASA weather-resistant resin and wood-like pigment and performing extrusion to prepare the antibacterial wood-like layer. In the antibacterial wood-like board, nano-silver and graphene in the antibacterial filler are closely combined and cannot fall off easily, the antibacterial effect is more lasting, the obtained wood-like plate is endowed with good antibacterial and sterilization characteristics, meanwhile, large granules are realized through two times of fixed loading, uniform dispersion is facilitated, and production and processing are easy.

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 relates to a preparation method of a degradable strapping tape material and belongs to the technical field of packaging materials. Polylactic acid is treated by argon plasma and graftedwith acrylic acid, and a high polymer material surface is subjected to plasma treatment to be modified; the plasma initiates surface grafting, the surface of polylactic acid can be hydrophilic and keeps hydrophilic for a longer time, thus, biological compatibility of the prepared strapping tape material is improved, and the degradation cycle of the prepared strapping tape material is easy to control; polypropylene is subjected to plasma treatment by plasma polymerization, and a thin film is formed on the surface of a graft copolymer and has good heat stability, good cohesiveness with the material, high strength, uniform and complete film surface and chemical corrosion resistance; polylactic acid is an aliphatic polyester high polymer material which is completely degradable and environmentally friendly, is prepared by polymerization of lactic acid obtained by cereal fermentation and can be completely decomposed under the actions of microorganisms, water, acid, alkali and the like afterbeing discarded.

The invention discloses a flexible sensor electrode preparation method, a flexible sensor electrode and a flexible sensor, and the method comprises the steps: carrying out the silane modification of agraphene oxide film, and obtaining a modified reduced graphene oxide film; and adsorbing a medium material on the modified reduced graphene oxide film, and modifying biological enzyme on the modifiedreduced graphene oxide film adsorbed with the medium material. The preparation method is simple in process, a medium layer and the electrode body can be tightly combined, and the flexibility of the sensor electrode can be realized.

The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a liquid degradable mulching film produced by utilizing a humus product as well as a preparation method and application of the liquid degradable mulching film. Rural mixed organic waste humus products are adopted as raw materials, active organic components in the raw materials are extracted through an alkali extracting agent, and then a film-forming agent, a plasticizer, a cross-linking agent and a reinforcing agent are added. The film-forming agent and the active organic component form a stable and dense three-dimensional network macromolecular chain polymer film structure through the cross-linking polymerization effect of the cross-linking agent; plasticizer molecules are inserted among molecular chains of the polymer film structure, so that the acting force among the molecular chains is weakened, the mobility of the molecular chains is increased, and the crystallinity of the molecular chains is reduced, thereby increasing the plasticity of the polymer film structure, adjusting the flexibility of the polymer film structure and improving the mechanical property of the polymer film structure; the reinforcing agent and the polymer form hydrogen bonds and are tightly combined, so that the mechanical property of the polymer membrane structure is improved.