35results about How to "Play the role of "bridge"" patented technology

The invention relates to a glass fiber and graphene hybrid filler filled polypropylene composite material and a preparation method thereof. The glass fiber and graphene hybrid filler filled polypropylene composite material comprises the following components: 45-85 parts of polypropylene, r 10-50 parts of glass fiber, and 0.0001-1 part of graphene. The glass fiber is chopped glass fiber with a flatsection, and the width-to-thickness ratio of the section is 2-10. The preparation method utilizes electrostatic self-assembly principle to realize coating of glass fiber with graphene oxide, melt blending and in-situ reduction of graphene oxide can be realized synchronously. The invention has the advantages that: as the graphene carrier, glass fiber can realize even dispersion of a minute quantity of graphene in the matrix, a conductive network is formed to substantially lower the material surface resistance, an excellent antistatic effect can be achieved, and the stable physical and chemicalproperties of graphene endow the material with long-acting antistatic properties under moist, heating, insolation, vibration and other harsh conditions.

The invention discloses a novel Polymer-COF-rGO composite membrane and a preparation method thereof. The preparation method comprises the steps that firstly, a COF monomer containing a polymer is prepared from a COF monomer and a linear Polymer, then the COF monomer, another COF monomer containing an amino group and graphene oxide (GO) are mixed and ground, DMF and acetic acid are added, then a heating reaction is conducted, and the novel Polymer-COF-rGO composite membrane is formed. In the synthesis reaction, two COF monomers form a COF material, added graphene oxide (GO) is reduced in-situ in a DMF solution and forms a covalent bond with amino in the COF material to be connected between rGO and COF at the same time under the heating condition, and in-situ growth of an rGO (reduced graphene oxide) membrane layer on the COF membrane layer is achieved. Due to the fact that the Polymer and the COF membrane layer are connected through covalent bonds, and the COF and the rGO membrane layer are connected through covalent bonds, the two types of 2D materials are effectively and tightly combined together, a bridging effect is achieved, and separation of COF photo-induced charges and migration of photo-induced electrons to rGO are improved.

The invention provides polyester staple fibers and a preparation method thereof, and belongs to the technical field of polyester fibers. Polyethylene terephthalate contains a nucleating agent nano barium sulfate, the particle size of the nano barium sulfate is less than or equal to 100 nm, the concentration of the nano barium sulfate in the polyethylene terephthalate is 10-1000 ppm, and the specification of the staple fibers is 0.90-1.60 dtex*38 mm; nano polyethylene terephthalate composite is prepared by esterification and polycondensation of nano barium sulfate ethylene glycol suspension anda polyester monomer, and the nucleating agent nano barium sulfate is added in the form of ethylene glycol suspension before esterification, or before polycondensation after esterification. The polyester monomer is pure terephthalic acid, ethylene glycol or medium purity terephthalic acid. The special polyester staple fibers for sewing threads are low in production cost, good in glossiness, high in strength and low in dry heat shrinkage rate, and can meet the requirements of sewing thread spinning process and dyeing and finishing processing.

The invention discloses a direct spinning preparation method of glazed ultrahigh strength terylene high toughness polyester staple fibers. The preparation method comprises the following steps: mixingand stirring terephthalic acid, ethylene glycol, a polyhydroxy compound and a titanium series catalyst; carrying out an esterification reaction on the mixture; then carrying out further esterificationreaction and polycondensation reaction under the action of a catalyst ethanediol stibium; before the polycondensation reaction, adding barium sulfate to obtain a glazed polyester melt, the characteristic viscosity of which is 0.650-0.675dl/g; and spinning the melt to prepare the ultrahigh strength terylene high toughness polyester staple fibers. For the prepared fibers, the strength is greater than 6.40cN/dtex, the breaking elongation is 18-24%, and the dry heat-shrinkage at 180 DEG C is 3.5-6.0%. The fibers can meet the demands on products for manufacturing reinforcing materials such as top-grade sewing threads, papermaking and concrete.

The invention provides an interface agent for mechanized construction. The interface agent is prepared from the following components in percentage by mass: 0 to 15 percent of manufactured sand, 45 percent of cement, 37 to 52 percent of powder and the balance of an additive, wherein the grain diameter of the manufactured sand is 0 to 1.2mm. The additive is prepared from 0.01 percent of hydroxypropyl methylcellulose ether, 2.48 percent of redispersible latex powder, 0.01 percent of starch ether, 0.1 percent of woody fiber, 0.2 percent of a thixotropic lubricant and 0.2 percent of a de-foaming agent. By adopting the interface agent, the problem of a bonding force can be solved and a concrete wall surface and wall surfaces made of other wall materials also can synchronously absorb water in a mechanical construction process, so that synchronous initial setting of different wall materials is ensured and cracking and hollowing phenomena caused by the fact that the shrinkage of wall bodies isdifferent are avoided; and a work slowdown phenomenon of workers is reduced and the construction efficiency is improved.

The present invention belongs to the technical field of material modification, and particularly relates to a modification method for surface treatment of nanoparticles in a supercritical ethanol state. The modification method specifically comprises: 1, uniformly mixing ethanol and a nanometer oxide (particle size of 20-100 nm), placing in a reaction kettle with a pressure gauge, and strictly sealing; 2, placed the sealed reaction kettle in a heating furnace with a temperature control device, and heating at a temperature of 240+/-1 DEG C; 3, observing the value of the pressure gauge on the reaction kettle, starting timing when the value of the pressure gauge achieves 6+/-0.5 MPa, and carrying out a thermal insulation and pressure maintaining reaction for 5-10 min; 4, immediately placing thereaction kettle into a cooling pool, and cooling for 30-60 min, wherein cooling water is an ice water bath, and the temperature is 0 DEG C; and 5, taking out the treated nanoparticles, placing in a 130 DEG C vacuum oven, drying for more than 6 h, and grinding in a mortar after completely drying to obtain the surface-treated nanoparticles.

The invention provides a high-weather-resistance black PC resin composition as well as a preparation method and application thereof. The black PC resin composition with high weather resistance comprises the following components: polycarbonate resin, hyperbranched polycarbonate, black powder, a hydrolysis-resistant agent, an antioxidant and a light stabilizer, the branching degree of the hyperbranched polycarbonate is 0.3 to 0.5, and the weight-average molecular weight of the hyperbranched polycarbonate is 6400 to 12000. According to the high-weather-resistance black PC resin composition disclosed by the invention, hyperbranched polycarbonate is introduced and is matched with other auxiliaries, so that the water resistance of the black PC resin composition can be effectively improved. The weather resistance and the highlight black surface state can be further improved, and the alloy material can be applied to preparation of spraying-free plastic products and can replace common spraying PC/ABS alloy materials on parts such as automobile household appliances and the like.

The invention relates to a papermaking retention aid, a preparation method and application thereof, and belongs to the technical field of preparation of modified polyacrylamide. The method comprises the following steps: uniformly mixing acrylamide, a cationic monomer, a structure regulator, a hydrophobic monomer, N-vinylformamide and a cationic surfactant with water to obtain a mixed solution; introducing nitrogen into the mixed solution to remove oxygen, then adding a polymerization additive to initiate a polymerization reaction to obtain jelly, and then sequentially granulating, drying and crushing the jelly to obtain copolymer powder; preparing the copolymer powder into a copolymer powder aqueous solution by using water, and then sequentially adding liquid bromine and a sodium hydroxide aqueous solution for modification treatment to obtain a modified treatment solution; and adjusting the pH value of the modified treatment solution to 8-9, and then filtering through a filter membrane to obtain the papermaking retention aid. The papermaking retention aid prepared by the invention improves the retention rate of fine fibers, and when the papermaking retention aid is used in a papermaking process, the papermaking production efficiency can be improved, the blockage of a water filtering channel is avoided, and the turbidity of white water can be effectively reduced.

The invention discloses a sponge water-permeable brick and a preparation method thereof, and belongs to the technical field of a water-permeable brick. The sponge water-permeable brick is prepared from the following raw materials in parts by weight: 80 to 90 parts of sludge powder, 5 to 10 parts of modified polypropylene fiber, 3 to 5 parts of granite aggregate, 1 to 3 parts of expanded perlite, 15 to 20 parts of bentonite, 5 to 10 parts of coal ash and 5 to 10 parts of diatomite. The water-permeable brick prepared by the method has high compressive strength and high water permeability, has sound absorbing and noise reducing properties, accords with the industrial standard of Water-permeable Brick (CJ/T945-2005), is low in cost, can perform industrial production, responds to sponge city concept and can serve as an important building material in sponge city construction.

The invention discloses a paint for a thermal insulating outer wall. The paint for the thermal insulating outer wall is prepared from, by weight, 10-25 parts of rosin resin, 2-7 parts of thermal insulation material, 5-10 parts of coarse whiting, 3-8 parts of nickel powder, 2-5 parts of vanillin, 1-4 parts of zinc stearate, 15-35 parts of crylic acid modified resin latex solution, 1-4 parts of butyl acetate, 1-5 parts of flatting agent, 2-6 parts of starch ether and 60-90 parts of deionized water. The paint for the thermal insulating outer wall has the advantages of higher anti-corrosive performance, and excellent heat retaining, sound-proof and anti-cracking properties.

The invention belongs to polymer composite materials and relates to a heat-conduction resin composition and a preparation method thereof. The heat-conduction resin composition is prepared from 100 parts by weight of a thermoplastic resin, 5-40 parts by weight of a resin mother material filled with boron nitride fibers, 2-50 parts by weight of boron carbide particles, 0.1-0.5 parts by weight of a lubricant and 0.1-1 part by weight of an anti-oxidant. The heat-conduction resin composition has high thermal conductivity and high mechanical strength. The heat-conduction resin composition can be used for easy preparation of a high-thermal conductivity member and especially for preparation of members in electrical and electronic parts. The boron nitride heat-conduction fibers has bridge effects in the heat-conduction resin composition, can bond heat conduction filler particles individually dispersed in the base resin and can connect isolated heat conduction units to form a large heat-conduction network so that the filler components easily form a communication network and thus thermal conductivity is greatly improved.