72results about How to "Good anti-swelling performance" patented technology

The invention discloses a preparation method of polydopamine modified alginic acid microspheres, which comprises the following steps of: under the protection of nitrogen, grafting dopamine to alginic acid by use of N-hydroxysuccinimide and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride; polymerizing the synthesized dopamine modified alginic acid under the slight alkaline condition to obtain a polydopamine modified alginic acid solution; dropwise adding the polydopamine modified alginic acid solution into a CaCl2 solution by a syringe; and aging to obtain polydopamine modified alginic acid microspheres. The method disclosed by the invention is simple in process, and the prepared modified alginic acid microspheres have higher swelling resistance and good mechanical properties.

The invention belongs to the technical field of polymer gel materials, and provides a composition for polymer gel, gel prepared from the composition and application of the gel. The composition comprises a polymer compound, a first solvent and a second solvent, wherein the polymer compound comprises but is not limited to at least one of the following substances: a polymer with a hydrogen bond effect, a polymer with a hydrophobic effect and a charged polyelectrolyte; in the first solvent, the non-covalent interaction in/among the high-molecular compounds is in a weakening shielding state; in thesecond solvent, the non-covalent interaction between the polymer compounds is activated and enhanced. The polymer gel prepared by the invention has high transparency, excellent mechanical properties,swelling resistance and icing resistance.

The invention relates to a strong-basicity ternary composite metal-graphene-ion exchange resin material and a preparing method thereof to mainly solve the problems that in the prior art, strong-basicity ion exchange resin is poor in heat resistance and swelling resistance and likely to be decomposed and deactivated when heated in the application process. The strong-basicity ternary composite metal-graphene-ion exchange resin material is prepared from, by weight, 75-90% of polymerized monomers, 5-15% of copolymer monomers, 0.1-10% of graphene, 0.1-1% of metal particle components and 0.1-10% of an initiator. According to the technical scheme, the problems are well solved, and the strong-basicity ternary composite metal-graphene-ion exchange resin material can be used for industrial production of strong-basicity composite ion exchange resin materials.

The invention relates to strongly basic carbon nanotube composite resin and its preparation method, and mainly aims to solve the problems of poor heat resistance and swelling resistance of ion exchange resin involved in previous technologies. The composite resin of the invention comprises: (1) 75-90% of a monomer; (2) 5-15% of a comonomer; (3) 0.1-5% of a nano-material; (4) 0.1-10% of an initiator. Specifically, the monomer is at least one of p-chloromethyl styrene, 4-(3-chloropropyl) styrene, 4-(3-bromopropyl) styrene, 4-(4-chlorobutyl) styrene, 4-(4-brombutyl) styrene, 4-(5-chloropentyl) styrene or 4-(5-bromopentyl) styrene; the comonomer is at least one of glycol dimethacrylate, 2-propenylbenzene, divinyl phenylmethane, and divinylbenzene;the nano-material is at least one of a multi-walled carbon nanotube, a single-walled carbon nanotube, C60 or C70 etc. fullerene; and the initiator is at least one of benzoyl peroxide, azodiisobutyronitrile, lauroyl peroxide, and cumene hydroperoxide. The composite resin and its preparation method of the invention well solves the above problems, and can be used in the industrial production of oxirane catalytic hydration.

The invention relates to a preparation method of a strong basic graphene composite resin material and mainly used for solving the problems of low dispersibility between an inorganic nanomaterial graphene and an organic polymeric monomer and difficult uniform polymerization into spheres in the existing strong basic graphene composite ion exchange resin preparation technology. The problems are well solved by virtue of the following technical scheme: the preparation method comprises the step of treating a solution containing a polymeric monomer, a comonomer and the graphene by use of microwave and ultrasonic wave; the composite resin material is prepared from the following components in percentage by weight: a) 75-90% of polymeric monomer, b) 5-15% of comonomer, c) 0.1-5% of graphene and d) 0.1-10% of initiator; and the preparation method can be applied to the industrial production of the strong basic graphene composite ion exchange resin materials.

The invention provides a production method of a cation exchange alloy film. The production method comprises the following steps: firstly, mixing thermoplastic polyethylene-sulfonated polystyrene strongly acidic cation exchange resin powder, non-thermoplastic micron-grade weakly acidic cation exchange resin powder (or non-thermoplastic micron-grade weakly alkaline anion exchange resin powder), polyethylene powder and polyisobutene powder; then carrying out internal mixing, open mixing and sheeting, continuous calendering, cooling and cutting to obtain a single prefabricated film sheet; finally,clamping one piece of enhanced mesh cloth by utilizing two pieces of the prefabricated film sheets; carrying out hot pressing to obtain a cation exchange alloy film product. The film has a smooth surface and a strong anti-pollution capability; a thermoplastic component and a non-thermoplastic component form a starry-sky-type high molecular alloy structure and the resistance of the film is low; the enhanced mesh cloth limits the swelling of the film in a strongly acidic or strongly alkaline solution and an inner structure is dense. The cation exchange alloy film provided by the invention is especially suitable for electroosmosis application occasions under a strongly acidic or strongly alkaline solution environment.

The invention discloses a novel attapulgite-reinforced resin catalyst and a preparation method thereof. The novel solid acid catalyst is prepared by suspension polymerization by using attapulgite as an independent dispersing agent. The preparation method comprises the following steps: modifying attapulgite by using a silane coupling agent until the surface has appropriate hydrophilicity/hydrophobicity; synthesizing attapulgite/polystyrene microspheres by using the modified attapulgite as a dispersing agent; and finally, sulfonating by concentrated sulfuric acid to obtain the attapulgite-reinforced resin solid acid catalyst. The structure of the catalyst is determined by Fourier-infrared spectrum and a scanning electron microscope. In the lactic acid-butanol reaction, compared with the Amberlyst-15, the catalyst disclosed by the invention has better properties, stable structure and excellent anti-swelling property.

The invention discloses an anti-swelling biological adhesive and a preparation method and an application thereof. The anti-swelling biological adhesive comprises a hydrogel substrate and a high-molecular polymer brush combined to the surface of the hydrogel substrate, the hydrogel substrate is prepared through a polymerization reaction of an acrylate compound and N-vinyl pyrrolidone, and the high-molecular polymer brush is prepared by carrying out polymerization reaction on acrylic acid and acrylic acid-N-succinimide ester. The anti-swelling biological adhesive provided by the invention has excellent comprehensive performance, and shows good adhesion performance, mechanical performance matched with tissues, good anti-swelling performance and biocompatibility in a wet environment. Therefore, the anti-swelling biological adhesive disclosed by the invention has wide biomedical prospects in the aspects of blocking and suturing wounds in extreme water environments such as gastrointestinal tracts and the like, tissue repair and the like.

The invention provides a composite hydrogel. The composite hydrogel comprises a porous high polymer material framework and hydrogel compounded in the porous high polymer material framework. The composite hydrogel contains the porous polymer material framework, the polymer material framework is used as an insoluble mechanical binding skeleton, long-chain hydrogel is used as a high-water-content functional module, and the hydrogel is immersed in porous holes of the polymer skeleton framework. The composite hydrogel prepared in the invention has relatively strong functionality and excellent swelling resistance, and the preparation method is simple and suitable for large-scale popularization and application.

The invention discloses a fluorine-containing oil-resistant and anti-swelling silicone rubber foam material and a preparation method thereof. The preparation method comprises the following steps: (1)uniformly mixing hydrogen-containing fluorosilicone oil, perfluorosilicone oil, a foaming agent and an inhibitor in a mass ratio of (1-2): (3-4): (0.01-0.5): (0.01-0.2) so as to obtain a component A,then additionally weighing the perfluorosilicone oil and a platinum catalyst, and carrying out uniform mixing so as to obtain a component B; and (2) mixing the component A and the component B according to a mass ratio of 1: 1, carrying out uniform stirring, then carrying out a reaction at a room temperature for 5-30 minutes, and carrying out crosslinking and curing on an obtained product at 50-125DEG C for 10-60 minutes; wherein in the component A, the foaming agent is a mixture of a fluorosilicone surfactant and a hydroxyl-containing reagent, and the inhibitor is a silicon alkyne compound and has a structural formula which is described in the specification; in the structural formula, R1, R2 and R3 are independently selected from the group consisting of H, a methyl group or an ethyl group, and R is selected from the group consisting of a cyclohexyl group or an isopropyl group; and in the component B, the mass ratio of the perfluorosilicone oil to Pt in the platinum catalyst is 100: (0.0001-0.01);

The invention relates to a strong-basicity graphene composite ion exchange resin material and a preparation method thereof. A matrix and graphene in the strong-basicity graphene composite ion exchangeresin material are combined in a covalent bond form. The technical scheme adopted by the invention is as follows: the strong-basicity graphene composite ion exchange resin material comprises the following components in parts by weight: (a) 75-90 parts of a polymeric monomer; (b) 5-15 parts of a comonomer; and (c) 0.1 to 10 parts of a graphene-styrene derivative compound. According to the technical scheme, the thermal decomposition temperature and the swelling resistance of the composite ion exchange resin are well improved, and the method can be applied to industrial production and application of strong-basicity composite ion exchange resin materials in the future.

A method for preparing wet sensing film of wet sensitive element on humidity transducer includes preparing two element graft reaction reagent containing acrylic acid of 1.8 mol / L and p ¿C benzolypolate sodium of 0.7 mol / L, placing high density polyethylene film in polyethylene film bag for charging in nitrogen, sealing it for electronic irradiation with total dosage of 200 KGy, placing it in two element graft reaction liquid for reaction of 3 hr. at 60 deg.c. taking grafted film out and placing it in deionized water for 24 hr. at 70 deg.c then soaking it in hydrochloric acid for transformation.

The invention provides an O-shaped ring for an automobile. The O-shaped ring material comprises the following components in parts by weight: 15-30 parts of natural rubber, 15-20 parts of synthetic resin, 20-40 parts of polyurethane, 2-3 parts of micron sized silica aerogel, 1-3 parts of sodium antimonate, 1-3 parts of jade powder, 2-7 parts of diisononyl phthalate, 3-7 parts of inorganic silicate material, 2-5 parts of zinc borate, 3-7 parts of zinc oxide, 1-3 parts of stearic acid, 4-8 parts of zinc methacrylate, 3-6 parts of plasticizer, 3-8 parts of zinc diethyl dithiocarbamaate, 1-6 parts of anti-aging agent, 5-15 parts of butadiene-styrene rubber, 1-3 parts of accelerant, 0.5-1 part of benzoic acid, and 3-8 parts of high abrasion furnace black. The O-shaped ring for an automobile provided by the invention is high in strength, excellent in wear-resisting property, good in oil resistance and solvent resistance, and especially good in swelling resistance for lubricating oil and fuel oil, and good in ozone resistance; and the service life and the product performance stability of the O-shaped ring for the automobile are improved.

The invention discloses an oil-resisting rubber hose of an automobile with a good anti-swelling property and in particular relates to the technical field of hoses of automobiles. The oil-resisting rubber hose comprises two joining steel pipes, wherein a hose body is fixedly arranged between the two joining steel pipes and an oil inlet joint and an oil outlet joint are separately mounted outside the two joining steel pipes; the hose body, the two joining steel pipes and the oil inlet joint and the oil outlet joint form a hose unit; the oil inlet joint and the oil outlet joint are connected to the two joining steel pipes through clamping structures; connectors are fixedly connected among different hose units, and baffle plate assemblies are arranged in the connectors. In the invention, the whole oil-resisting rubber hose of the automobile has excellent acid and alkali resistance, swelling resistance and aging resistance and is provided with a better disassembling and assembling structure, so that the mounting and detaching flexibility is improved. The oil-resisting rubber hose of the automobile is operated more conveniently. Meanwhile, a quick flow stopping operation can be achievedunder overhauling or accidental conditions, so that the safety coefficient is high.

The invention relates to a method for increasing the sulfonation degree of polyetheretherketone. The method comprises the following steps: mixing polyetheretherketone with a composite sulfonating agent and stirring for reaction at 50 DEG C for 4-8 hours; cooling down to room temperature after the reaction is finished, and pouring the mixed solution into an ice-water mixture for separating out theproduct; washing the resulting product for multiple times with a large amount of pure water until the pH value of the product is neutral, and then subjecting the product to heat treatment for 1-2 hours with heated pure water and carrying out filtering; carrying out drying at 60 DEG C for 12 hours in a drying oven, and then drying at 90 DEG C for 24 hours in a vacuum drying oven to obtain sulfonated polyetheretherketone. The sulfonated polyetheretherketone prepared by the method disclosed in the invention has a high sulfonation degree, which ranges from 50% to 70%, and has excellent film-forming and anti-swelling properties and good mechanical stability; and the preparation process is simple and convenient.

The invention discloses an alcohol fuel additive and a preparation method thereof, and belongs to the technical field of fuel additives. The alcohol fuel additive is prepared from the following raw materials in parts by weight: 15 to 25 parts of fusel oil, 10 to 15 parts of fuel value enhancer, 5 to 10 parts of stabilizer, 3 to 6 parts of neutralizer, 2 to 5 parts of solubilizer, 3 to 5 parts of anti-swelling agent; 2 to 6 parts of anti-oxidation and anti-gel agent. The raw materials are stirred and mixed by a certain order of addition and conditions to obtain the alcohol fuel additive. The alcohol fuel additive can solve problems of low calorific value in existing alcoholic automotive fuels, poor compatibility of various raw materials, easy delamination of fuel when exposed to water, corrosiveness of alcohols, swelling to rubber, gum formation during use and the like. The preparation method is simple, low in cost, convenient to use, environmentally friendly, and economic and feasible.The alcohol fuel additive can be used as an alternative fuel for gasoline and can solve an increasingly depleted petroleum energy problem.

The invention discloses a preparation method of an MIL-100 (Fe)/PDMS (polydimethylsiloxane) membrane, which comprises the following steps: preparing silicone oil PDMS, MIL-100 (Fe), a cross-linking agent, a catalyst and a solvent into a membrane casting solution, coating the membrane casting solution on a solvent-resistant ultrafiltration membrane, and heating after the solvent is volatilized to further crosslink and cure the membrane casting solution, thereby obtaining the MIL-100 (Fe)/PDMS organic gas permeable membrane. According to the prepared permeable membrane, MIL-100 (Fe) is directly added, the separation performance of the membrane can be greatly enhanced, and when the permeable membrane is used for recovering low-molecular-weight hydrocarbons from air and organic mixed gas, the separation factor is greatly increased.

The invention discloses a cationic polymer containing a branched structure, and a preparation method and application thereof. The structure of the polymer is shown in the description. An anion exchange membrane prepared on the basis of the polymer has the advantages of good swelling resistance, low water absorption, high conductivity and the like, and can be applied to electrochemical energy conversion devices such as fuel cells, flow cells and electrolyzed water.

The invention relates to a novel modified fuel methanol, which is prepared from the following raw materials by volume: 95% of methanol and 5% of an additive. According to the invention, through the reasonable ratio of the methanol to the additive, the technical problems of corrosion, swelling, difficult cold starting, hot gas resistance, water separation, power reducing, fluidity and the like of the existing fuel methanol are solved, and the additive consumption is reduced so as to further reduce the production cost; and the raw material for preparing the additive is reduced through the improvement, and the ratio of various raw materials is determined, such that the stable performance of the fuel methanol is ensured, and the possibly occurring safety accidents during the selection of the ratio of various high-risk raw materials is effectively eliminated.