42results about How to "Increase the content of functional groups" patented technology

The invention discloses a glass bead modified PBT (polybutylene terephthalate) material with epoxy resin bonding performance. The glass bead modified PBT material consists of the following raw materials in parts by weight: 60 to 80 parts of PBT, 15 to 20 parts of cardanol amine, 15 to 20 parts of polyvinyl alcohol microspheres, 5 to 8 parts of sodium dodecyl sulfate, 5 to 10 parts of gelatin, 6 to 12 parts of glass bead master batches, 1 to 3 parts of erucamide and 1 to 3 parts of an antioxidant 245. According to the glass bead modified PBT material, a coated curing agent is introduced to increase the content of functional groups capable of being reacted with epoxy resin in the material, and meanwhile, a microcapsule of the microcapsule curing agent can be broken to be slowly released under a certain condition to implement curing, so that the aim of controlling a material and epoxy resin pouring sealant curing process is fulfilled, and the interface bonding performance between the material and the epoxy resin is improved; in addition, the advantages of vacuum structures of hollow glass beads are fully utilized, so that the density, dielectric constant and electric conductivity of the PBT material are improved.

The invention discloses ethylene glycol diglycidyl ether dimethacrylate organic phosphate and a synthetic method thereof, wherein the ethylene glycol diglycidyl ether dimethacrylate organic phosphate is used for an ultraviolet (UV) photocureable coating adhesion promoter. Ethylene glycol diglycidyl ether is added into a reaction kettle provided with a cooling device, a heating device and a mechanical agitation device, a ring-opening addition reaction between the ethylene glycol diglycidyl ether and methacrylic acid is conducted on the conditions of methacrylic acid rapid agitation and the existence of catalyzers and polymerization inhibitors to generate ethylene glycol diglycidyl ether dimethacrylate, and an esterification reaction between the ethylene glycol diglycidyl ether dimethacrylate and phosphorus pentoxide is conducted to generate the ethylene glycol diglycidyl ether dimethacrylate organic phosphate. A generated target product is light in color, low in acid value and good in adhesive force, also has four functional groups, can be used as an addictive used for production of UV photocureable coatings, dissolves well in universal (methyl) crylic acid activated monomers and (methyl) acrylic resin, can increase adhesive force, on base materials such as metal, glass, plastics, acrylonitrile butadiene styrene(ABS), of resin and the UV photocureable speed of the resin.

The invention discloses a micrometer calcium carbonate modified PBT (polybutylene terephthalate) material with epoxy resin bonding performance. The micrometer calcium carbonate modified PBT material consists of the following raw materials in parts by weight: 60 to 80 parts of PBT, 15 to 20 parts of cardanol amine, 15 to 20 parts of polyvinyl alcohol microspheres, 5 to 8 parts of sodium dodecyl sulfate, 5 to 10 parts of gelatin, 6 to 10 parts of alkali-free short fiberglass, 2 to 4 parts of micrometer calcium carbonate, 1 to 3 parts of sodium stearate and 1 to 3 parts of an antioxidant 242. According to the micrometer calcium carbonate modified PBT material, a coated curing agent is introduced to increase the content of functional groups capable of being reacted with epoxy resin in the material, and meanwhile, a microcapsule of the microcapsule curing agent can be broken to be slowly released under a certain condition to implement curing, so that the aim of controlling a material and epoxy resin pouring sealant curing process is fulfilled, and the interface bonding performance between the material and the epoxy resin is improved.

The invention discloses a production method of superfine glass microfibers. The production method comprises the following steps: weighing raw materials, preprocessing quartz sand, feldspar powder, dolomite powder, calcite powder and fluorite powder; uniformly mixing the raw materials with borax, sodium carbonate, sodium nitrate, potassium carbonate and a clarifying agent to obtain a batch, meltingthe batch to obtain molten glass, feeding the molten glass into a centrifugal fiber forming machine, throwing out the molten glass through a centrifugal head of the centrifugal fiber forming machine,and forming ultrafine glass microfibers under the action of blowing airflow. According to the invention, the tensile strength of the glass microfibers can be effectively improved, the produced microfiber glass has the advantages of less slag balls and uniform fiber diameter, and the quality of microfiber glass wool is improved.

The invention discloses a PBT material with epoxy resin cohesiveness for an ignition coil. The PBT material is prepared from the following raw materials in parts by weight: 60 to 80 parts of PBT, 15 to 20 parts of cardanol amine, 15 to 20 parts of polyvinyl alcohol microsphere, 5 to 8 parts of sodium dodecyl sulfate, 5 to 10 parts of gelatin, 6 to 12 parts of carbon nanotube, 1 to 3 parts of zinc stearate and 1 to 3 parts of antioxygen 245. According to the PBT material, a coated curing agent is introduced, so that the content of functional groups with reaction capacity with epoxy resin in the material is increased, and additionally, the microcapsule curing agent can break through a microcapsule and can be slowly released under certain conditions so as to complete the curing behavior, so that the purpose of controlling the curing process of the material and an epoxy resin sealant is achieved, and the interface cohesiveness between the material and the epoxy resin is increased.

The invention discloses a glass microsphere modified PBT material, which is composed of the following raw materials in proportion by weight: 60-80 parts of PBT, 15-20 parts of aluminum dihydrogen phosphate, 15-20 parts of borax, and 5-8 parts of potassium sodium silicate 5-10 parts of zinc oxide, 6-12 parts of hydrogenated castor oil, 1-3 parts of cryolite, 2451-3 parts of antioxidant. The present invention introduces the coated curing agent to increase the content of functional groups that have the ability to react with epoxy resin in the material. At the same time, the microcapsule curing agent can break the microcapsules under certain conditions and release slowly to complete the curing behavior, so as to achieve the control of material and epoxy resin. The purpose of the epoxy resin potting glue curing process is to improve the interface adhesion between the material and the epoxy resin; in addition, the advantages of the vacuum structure of the hollow glass microspheres are fully utilized to reduce the density, dielectric constant and conductivity of the PBT material. coefficient.

The invention discloses a preparation method of a collagen peptide grafted hydrothermal carbon microsphere absorbing agent. The method comprises the following steps: (1) preparing collagen peptide powder; (2) preparing carboxylated hydrothermal carbon microspheres; (3) dispersing 1-10 parts of the carboxylated water thermal carbon microspheres into 20-50 parts of ultrapure water, carrying out ultrasonic treatment for 1-3 hours, stirring, adding 1-10 parts of a mixture of 1-ethyl-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) to enable the carboxyl group of hydrothermal carbon to be activated, carrying out an ice bath reaction for 30-90min, then adding 1-50 parts of collagen peptide powder, carrying out an ice bath reaction for 30-90min, removing the product froman ice bath, carrying out a reaction for 24h at the room temperature, then filtering, washing and drying to obtain the collagen peptide grafted hydrothermal carbon microsphere absorbing agent. The collagen peptide grafted hydrothermal carbon material has high absorption capacity and selectivity, and can be applied to treatment of wastewater containing heavy metal ions. The preparation method is simple to operate, high in efficiency, simple in preparation process, high in practicality and low in cost; the prepared absorbing agent is an environment-friendly material.

The present invention discloses a high-crystallization-rate PBT (polybutylece terephthalate) material with epoxy resin adhesion, made from the following materials according to parts by weight: 60-80 parts of PBT, 15-20 parts of cardanol amine, 15-20 parts of polyvinyl alcohol microspheres, 5-8 parts of sodium dodecyl sulfate, 5-10 parts of gelatin, 2-4 parts of fiberglass, 3-6 parts of nano talc, 2-4 parts of nano titanium nitride, 1-3 parts of acrylate and 1-3 parts of antioxidant 245. The coated curing agent is introduced to increase the content of functional groups in the material that are reactable with epoxy resin, the microcapsule curing agent can break microcapsules under certain conditions to release slowly so as to finish curing, the curing process of the material with epoxy resin potting is accordingly controlled, and interfacial adhesion between the material and the epoxy resin is improved.

The invention relates to spherical polytetrafluoroethylene micro-powder wax and a preparation method thereof, and the preparation method comprises the following steps: irradiating a polytetrafluoroethylene raw material and an organic siloxane adsorbent in an aerobic environment together, crushing to obtain polytetrafluoroethylene micro-powder, and then carrying out dispersion polymerization to obtain the spherical polytetrafluoroethylene micro-powder wax. In the preparation process, fluorine-containing gas generated in the irradiation process can be consumed, and the damage to the microstructure of the polytetrafluoroethylene micro powder is reduced; the conversion rate of carboxyl at the tail end of a polytetrafluoroethylene chain is increased, and the content of functional groups on the surface of the micro powder is increased, so that subsequent chemical modification is facilitated; the chain end of the polymer has activity and is easy to graft to obtain products with different properties, and active functional groups such as carboxyl and hydroxyl at the chain end of the polymer can be used for modification to form a comb-shaped polymer, so that the application range of the comb-shaped polymer is expanded; the shape of the polytetrafluoroethylene micro-powder is not greatly damaged, the polytetrafluoroethylene micro-powder is extremely easy to form a sphere during chemical modification, and the obtained micro powder is relatively small in particle size, uniform in size and good in dispersion performance.

This case involves a spherical polytetrafluoroethylene micropowder wax and its preparation method, including: PTFE raw materials and organosiloxane adsorbents are jointly irradiated and pulverized in an aerobic environment to obtain polytetrafluoroethylene micropowder, Subsequently, spherical polytetrafluoroethylene micropowder wax was prepared by dispersion polymerization. In the preparation process of the present invention, the fluorine-containing gas produced in the irradiation process can be consumed, and the damage to the microscopic appearance of the polytetrafluoroethylene micropowder can be reduced; the conversion rate of the terminal carboxyl group of the polytetrafluoroethylene chain can be improved, and the content of functional groups on the surface of the micropowder can be increased, thereby It is more conducive to subsequent chemical modification; the end of the polymer chain is active, and it is easy to graft to obtain products with different properties. It can also be modified by using active functional groups at the end of the polymer chain, such as carboxyl and hydroxyl groups, to form a comb polymer and expand its application. Range: The morphology of PTFE micropowder is not greatly damaged, and it is also very easy to form a spherical shape during chemical modification. The obtained micropowder has a small particle size, uniform size, and good dispersion performance.

The invention discloses a multifunctional phosphite water-soluble fertilizer and a preparation method thereof, and relates to the technical field of agricultural fertilizers. The phosphite multifunctional water-soluble fertilizer comprises phosphite, activated humic acid, phosphate and nutrient elements, the phosphate is composed of N, P2O5 and K2O, the nutrient elements are one or more of B, Mn, Cu, Zn, Mo and Fe which are mixed according to any proportion, the mass ratio of phosphorous acid phosphorus to phosphoric acid phosphorus in the phosphite (in terms of P2O5) is 1: (0.3-1.2), and the concentration of the activated humic acid is 20-80 g / L. According to the present invention, the phosphite and the activated mineral source humic acid are adopted as the basis, the antibacterial, nutritional and multifunctional water-soluble fertilizer with the macro-nutrition element and the micro-nutrition element is matched, the growth and development requirements of various crops are met, the chemical activity and the biological activity are improved by activating the mineral source humic acid, and the nutrition, the antibacterial property and the physiological regulation are integrated.

The invention discloses a method for preparing a collagen peptide grafted hydrothermal carbon microsphere adsorbent, comprising: (1) preparation of collagen peptide powder; (2) preparation of carboxylated hydrothermal carbon microspheres; (3) Disperse 1-10 parts of carboxylated hydrothermal charcoal microspheres in 20-50 parts of ultrapure water, sonicate for 1-3 hours, stir, and add 1-10 parts of 1-ethyl-(3-dimethylaminopropyl) The mixture of carbodiimide EDC and N-hydroxysuccinimide NHS activates the carboxyl group of hydrothermal charcoal, and reacts in ice bath for 30-90 minutes, then adds 1-50 parts of collagen peptide powder, and reacts in ice bath for 30-90 minutes , removed from the ice bath, filtered at room temperature for 24 hours, washed, and dried to obtain the collagen peptide grafted hydrothermal carbon microsphere adsorbent. The collagen peptide grafted hydrothermal carbon material of the present invention has high adsorption capacity and Selectivity can be applied to the treatment of wastewater containing heavy metal ions; the preparation method of the invention is simple in operation, high in efficiency, simple in preparation process, strong in practicability and low in cost, and the obtained adsorbent is an environmentally friendly material.

The invention provides a modified carbon material, a preparation method thereof, and a redox flow battery electrode modified by a graphene-like nanosheet prepared from the same. The preparation methodcomprises the steps of: 1) subjecting phytic acid and an amino group-containing substance to in-situ polymerization on the surface of the carbon material; and 2) calcining the product at a high temperature. The carbon material treated by the method has rich oxygen-containing functional groups on its surface, and has greatly improved hydrophilic property, electrochemical activity and specific surface area. Moreover, the loading amount of hetero elements such as nitrogen and phosphorus can be controlled by adjusting the amount and molar ratio of phytic acid and urea. The electrode has high specific surface area and a high functional group content (for example, the oxygen-containing functional group), and exhibits good catalytic activity for both the positive and negative electrode pairs ofan all-vanadium redox flow battery, and the high catalytic activity of the electrode greatly reduces the polarization of the electrode.

The invention provides a modified carbon fiber / SiO 2 The preparation method of the airgel composite material comprises the steps of: desizing the carbon fiber, and after nitric acid oxidation treatment, using silane coupling agents KH-550 and KH-560 to carry out surface modification and grafting treatment to obtain the modified carbon fiber; Stir and disperse the modified carbon fiber and silicon dioxide wet gel evenly, and freeze-dry after drying, aging, hydrophobic modification and soaking. The preparation method of airgel composite material of the present invention strengthens SiO by adopting the modified carbon fiber 2 The performance of airgel, the chemical cross-linking combination of the two has better mechanical properties than the previous physical combination, the whole operation method is simple, the operating conditions are mild, the steps are closely connected, and the prepared material has good performance.

The invention provides a modified carbon material and a preparation method thereof, and a nitrogen-enriched liquid flow battery electrode prepared from the material. The preparation method comprises: 1) a substance containing an amino group and a substance containing a hydroxyl group are placed on the surface of the carbon material Carrying out in-situ polymerization reaction, and 2) calcining to obtain the modified carbon material. The carbon material treated by this method is rich in nitrogen-containing functional groups and oxygen-containing functional groups on the surface, and its hydrophilic performance, electrochemical activity and specific surface area are greatly improved. Moreover, the loads of nitrogen and oxygen elements can be controlled by adjusting the amount of formaldehyde-urea-melamine. The electrode has a high specific surface area and a high functional group content (such as an oxygen-containing functional group), especially for the main redox couple of the vanadium ion, which shows good catalytic activity, and its higher catalytic activity greatly reduces the polarization of the electrode. .