286 results about "Hyperbranched polymers" patented technology

The invention provides a modified polyimide fiber and a preparation method and application thereof, and the preparation method comprises the following steps: S1, adding a polyimide fiber into an alkali solution for reaction, cleaning a reactant with acid and alkaline alcohol, and drying to obtain an activated polyimide fiber; s2, adding the activated polyimide fiber into an alkaline alcohol solution, adding into a first silane coupling agent, carrying out modification reaction, adding modified epoxy resin, and mixing to obtain a bottom layer component; s3, adding the activated polyimide fiber into an alkaline alcohol solution, adding a second silane coupling agent and a hyperbranched polymer, and carrying out a modification reaction to obtain a surface layer component; and S4, covering the bottom layer component with the surface layer component, drying to obtain the modified polyimide fiber, and optimizing the coating to obtain the modified polyimide fiber with high mechanical property, excellent atomic oxygen resistance and ultraviolet resistance and environmental adaptability.

The invention relates to the technical field of rubber, and relates to a wear-resistant rubber composite material and a preparation method thereof. The wear-resistant rubber composite material is prepared from the following components in parts by weight: 100 parts of a rubber matrix, 30 to 60 parts of multi-stage core-shell structure composite filler, 10 to 15 parts of carbon black, 1.0 to 2.5 parts of a vulcanizing agent, 0.5 to 2.0 parts of an accelerant, 3 to 6 parts of an active agent and 1 to 3 parts of an anti-aging agent, the multi-stage core-shell structure composite filler sequentially comprises a rigid inorganic nano-particle core, a rigid inorganic nano-particle core and a rigid inorganic nano-particle core from inside to outside, the core is coated with the first shell layer, the first shell layer is a mesoporous silica layer, and a silane coupling agent containing sulfur groups is modified in the mesoporous silica layer; and the second shell layer is coated outside the first shell layer and is a hyperbranched polymer layer. According to the wear-resistant rubber composite material provided by the invention, the comprehensive mechanical property and wear resistance of the rubber composite material are improved.

The invention relates to the technical field of non-woven fabrics, and particularly discloses a soft SMS non-woven fabric and a preparation method thereof. The soft SMS non-woven fabric comprises a spunbond layer and a melt-blown layer, and the spunbond layer comprises the following raw materials in parts by weight: 65-80 parts of spunbond PP, 5-10 parts of a PE / PP copolymer, 2-4 parts of PP-g-MAH, 4-6 parts of a dopamine grafted hyperbranched polymer and 7-11 parts of mineralized nanocellulose. The soft SMS non-woven fabric can be used in the fields of medical protection, hygienic product materials, industrial filtration and the like, and is comfortable in hand feeling and excellent in softness.

The invention provides high-grinding-efficiency color paste, a preparation method thereof and dispersed ink, and belongs to the technical field of dispersed ink, and the high-grinding-efficiency color paste comprises the following components in percentage by weight: 15%-30% of disperse dye toner, 15%-25% of a dispersing agent, 5%-15% of resin ammonium salt, 10%-20% of a dissolution promoting mixture, 0.5%-2% of a wetting agent and the balance of water; the dispersing agent comprises a hyperbranched polymer and a sodium naphthalene sulfonate improved polymer; the hyperbranched polymer takes a benzene ring as a center, hydrophobic groups and hydrophilic groups on a branched chain are randomly distributed, the hydrophilic groups of the branched chain comprise carboxylate and sulfonate, and the hydrophobic groups of the branched chain comprise alkane, ester and aryl. According to the invention, the hyperbranched polymer and the sodium naphthalene sulfonate improved polymer are mixed with the dispersing agent, so that the problem of abrupt change of ink viscosity can be avoided when the content of ink toner is relatively high, thereby obtaining the color paste with strong dispersion and high stability, and further obtaining the dispersed ink with good stability.

The invention relates to the technical field of plastic processing aids, and particularly discloses a pearlescent color master batch for PET bottle blowing and a preparation method of the pearlescent color master batch. The pearlescent color master batch for PET bottle blowing comprises the following raw materials in percentage by mass: 65-75% of PET carrier resin, 2-8% of a composite dispersant, 1-2% of a lubricant, 15-25% of an organic pigment and 6-10% of a pearlescent pigment, the composite dispersant comprises the following raw materials: macrocyclic oligoester, a hyperbranched polymer and an ionic liquid. When the pearlescent color master batch for the PET blown bottle is applied to preparation of the PET blown bottle, uniform dispersion can be achieved, the glossiness and the pearlescent effect of the PET blown bottle are remarkably improved, the uniformity and consistency of the appearance of a product are kept, and the PET blown bottle is endowed with unique metal texture.

The invention discloses a dispersing agent, an electrode plate and a battery. The dispersing agent comprises a hyperbranched polymer, and the hyperbranched polymer contains a hyperbranched core, a plurality of branched repeating units and a connecting chain; wherein the branched repeating unit comprises at least one of carbonyl and ether, and the connecting chain is connected with the hyperbranched core and the branched repeating unit. The hyperbranched polymer in the dispersant can effectively anchor electrode materials of the electrode slurry through the synergistic effect of the hyperbranched core and the branched repetitive unit contained in the hyperbranched polymer, so that the dispersibility of each electrode material is improved, and the rheological property of the electrode slurry is adjusted. The connecting chain effectively enhances the stability of connection between each branched repeating unit and the hyperbranched core, so that the molecular structure of the hyperbranched polymer and the stability of the dispersion effect are improved. Any one of the electrode plate and the battery contains the dispersant provided by the invention.

The invention discloses a flame-retardant B1-grade sheath material and application thereof in cables, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by weight: 40-50 parts of an ethylene-vinyl acetate copolymer, 10-20 parts of an ethylene-vinyl alcohol copolymer, 10-20 parts of a functional hyperbranched polymer, 30-40 parts of a metal organic framework modified composite flame retardant, 3-5 parts of a compatilizer, 0.8-1.2 parts of an antioxidant and 0.4-0.6 part of a lubricant. The functional hyperbranched polymer comprises structural units introduced by the following monomers: triphenyl isocyanate thiophosphate and N-[(4-methyl-1H-benzotriazole-1-yl) methyl] diethanol amine. The material is high in tensile strength, sufficient in thermal shock resistance and excellent in aging resistance and flame retardance.

The invention discloses a solid electrolyte membrane, a preparation method and a lithium battery. The solid electrolyte membrane comprises a polymer electrolyte, the structure of the polymer electrolyte is a hyperbranched polymer, a molecular chain of the polymer electrolyte contains a polyoxyethylene chain segment, ether oxygen atoms in an amorphous phase region can form coordination with lithium ions, migration of the lithium ions is facilitated, and the ionic conductivity of the solid electrolyte membrane is improved; besides, a nitrogen and sulfur element annular structure is introduced into the hyperbranched polymer, so that the mechanical strength of the solid electrolyte membrane can be effectively improved, the ionic conductivity of the solid electrolyte membrane can be further improved, the interface impedance can be reduced, and the comprehensive performance of the battery on safety performance and electrical performance is improved.

According to the dispersing agent for the positive electrode slurry, the positive electrode slurry, the positive plate and the electrochemical device, the dispersing agent comprises a solvation chain segment, the solvation chain segment is a hyperbranched polymer, and a terminal unit of the hyperbranched polymer is an electronegative group. According to the dispersing agent for the positive electrode slurry, provided by the invention, the hyperbranched polymer with an electronegative terminal group is used as a solvation chain segment, and a high-density terminal functional group is provided through a hyperbranched structure, so that the anchoring capability and the space stabilization effect on a positive electrode active material are remarkably enhanced; meanwhile, by utilizing the electrostatic repulsion effect of electronegative groups and the surface of the positive electrode material, the dispersion stability of the slurry is effectively improved, and sedimentation and agglomeration are inhibited.

A hyperbranched polymer and a preparation method therefor and the use thereof. The hyperbranched polymer comprises a structural formula of formula 1, wherein R is selected from a substituted or unsubstituted C12-C18 alkyl. The hyperbranched polymer, which is used as a demulsifier for demulsifying crude oil emulsions, exhibits a high demulsification efficiency, a low usage amount, a low demulsification temperature, a high acid and alkali resistance, and a high salt resistance. The demulsifier has a high demulsification performance in oil-water emulsions with various properties.

The invention discloses an epoxy resin adhesive and a preparation method thereof, and belongs to the technical field of material preparation. The adhesive is composed of 50-100 parts of an epoxy resin main agent and 50-120 parts of a curing agent; the epoxy resin main agent is functionalized carbon nanotube modified liquid epoxy resin, and the functionalized carbon nanotube modified liquid epoxy resin is composed of 100 parts of bisphenol epoxy resin, 5-25 parts of diglycidyl ether and 5-15 parts of glycidyl methacrylate; the curing agent is prepared from 60 to 100 parts of modified polyamine curing agent, 10 to 25 parts of hyperbranched polymer modifier, 5 to 15 parts of nano silicon dioxide dispersion, 10 to 20 parts of amino-terminated liquid nitrile rubber and 3 to 10 parts of curing accelerator. According to the invention, a high-temperature curing and normal-temperature curing combined technology is adopted to realize that the epoxy resin adhesive forms strength in a short time at normal temperature and does not adhere to the wheel, and secondary curing can be carried out at high temperature, so that interlayer bonding is enhanced. The preparation process is simple, and the prepared epoxy resin adhesive is excellent in tensile property and bonding property.

The invention discloses a robot simulation skin and a preparation method of the robot simulation skin. The formula of the robot simulation skin is composed of 100 parts of an organosilicon polymer with a main chain containing double bonds, 30-45 parts of a hyperbranched phenyl silicone oil plasticizer, 5-18 parts of a nanoscale texture conditioning agent, 7-22 parts of a dynamic crosslinking system and 1.5-9 parts of a function response additive. Through cross-scale cooperation of an organosilicon polymer matrix and functional components, a conformational entropy buffer network of a hyperbranched plasticizer is constructed on a molecular level, a light-force energy flow channel decoupling mechanism of a core-shell regulator is formed on a mesoscopic level, space-time regulation and control of gradient crosslinking and photo-thermal response are realized on a macroscopic level, and meanwhile, the cross-scale cross-linked hyperbranched polymer has good application prospects. The physical essence of inherent contradictions of'high-temperature softening-low-temperature embrittlement 'and'light transmittance-elasticity mutual exclusion' of existing silica gel skin is broken through, and the sensitivity of conformation entropy change to temperature is reduced through the molecular topology confinement effect.

The invention belongs to the technical field of modified plastics, and particularly relates to a high-reflection low-transmittance polypropylene composite material as well as a preparation method and application thereof. The invention provides a novel polypropylene composite material formula, which comprises homo-polypropylene, precipitated barium sulphate, hollow glass beads, maleic anhydride grafted polypropylene and a hyperbranched polymer dispersant, through selection and synergistic effect of the specific components, the reflectivity of the obtained polypropylene composite material is significantly improved, the light transmittance is greatly reduced, and the polypropylene composite material has a good application prospect. Good mechanical properties and high-whiteness surface appearance are kept, and the high-whiteness optical fiber can be widely applied to the field of various optical products.

The invention relates to the technical field of epoxy resin preparation, and particularly discloses a modified epoxy resin packaging material and a preparation method thereof.The modified epoxy resin packaging material is prepared from, by weight, 96-130 parts of resin matrix, 14-16 parts of heat conduction filler, 9-12 parts of composite flame retardant, 4.6-5.6 parts of curing accelerator, 1.2-1.4 parts of photoinitiator and 440-500 parts of solvent; the hydroxyl-terminated hyperbranched polymer and the heat-conducting filler are added into the modified epoxy resin packaging material, and the polymer contains rich active hydroxyl, benzene rings,-Si-O-Si bonds and sulfydryl, not only can be subjected to a curing reaction with bisphenol A epoxy resin, but also can be subjected to a reaction with the heat-conducting filler, so that the heat-conducting property of the heat-conducting filler is improved; the overall crosslinking density of the modified epoxy resin packaging material is improved, the dispersity of the heat-conducting filler is improved, the heat conductivity is improved, and meanwhile the ablation resistance and the mechanical property of the modified epoxy resin packaging material are improved.

The invention discloses a solvent-free adhesive for an electron beam curing flexible package and a preparation method thereof, and belongs to the technical field of adhesives, the adhesive comprises the following raw materials by weight: 60-80 parts of urethane acrylate, 10-15 parts of a crosslinking component, 20-40 parts of a diluent, and 5-10 parts of an auxiliary agent; the cross-linking component is a hydroxyl-terminated hyperbranched polymer which is prepared from 3-(methacryloyloxy) propyl trimethoxy silane and dihydroxyl quaternary ammonium salt. The solvent-free adhesive for the electron beam curing flexible package, provided by the invention, has the advantages that the solvent-free property is good; the electron beam curing solvent-free adhesive is low in viscosity, odorless, free of voc emission, capable of being rapidly cured, environmentally friendly, safe and convenient to use, high in curing degree, long in storage time, high in curing speed and capable of being widely applied to flexible package composite films in the fields of food, medicine and the like, and macromolecules are subjected to cross-linking curing according to the electron beam curing principle.

The invention provides an ultralow-temperature-resistant fiber-reinforced resin-based composite material and a preparation method thereof, and belongs to the technical field of composite materials. Firstly, alpha, beta unsaturated ketene and diamine are synthesized into a hyperbranched polymer through a one-pot method, a hyperbranched polymer solution serves as a sizing agent to conduct surface treatment on fibers, and then the fibers and ultralow-temperature-resistant thermosetting resin are compounded and cured to obtain the ultralow-temperature-resistant fiber-reinforced resin-based composite material. The hyperbranched polymer with a dendritic three-dimensional space structure is used as an interface phase, has abundant amido bonds, is terminated by primary amine, not only forms intramolecular and intermolecular multiple hydrogen-bond interaction, but also can be chemically reacted with resin to construct a covalent bond-hydrogen bond hybrid cross-linked network, so that the cross-linked network structure is improved; the interface of the fiber reinforced composite material is reinforced and toughened under ultralow temperature and room / ultralow temperature circulation, and the fiber reinforced composite material can be applied to ultralow temperature scenes such as liquid hydrogen storage tanks, conveying pipes, deep space exploration component materials, polar region scientific investigation and icebreaking equipment and the like.

The invention provides a nylon composite material as well as a preparation method and application thereof, and belongs to the technical field of nylon composite materials. The nylon composite material comprises the following raw materials in parts by mass: 35-75.5 parts of nylon resin; 20 to 40 parts of glass fiber; 2-15 parts of a wear-resistant agent; 1 to 5 parts of silicone; 1-5 parts of a compatilizer; 0.5 to 1 part of an antioxidant; 0.5 to 1.5 parts of a lubricant; 0.5 to 1.5 parts of a coloring agent; the wear-resistant agent comprises more than one of ultra-high molecular weight polyethylene, a hyperbranched polymer, polytetrafluoroethylene and silicone oil. The nylon composite material is prepared by compounding the nylon resin, the glass fiber, the wear-resistant agent, the silicone, the compatilizer, the antioxidant, the lubricant and the coloring agent, so that the wear resistance and the melt strength of the nylon composite material are remarkably improved, meanwhile, the nylon composite material has excellent machinability and mechanical properties, the machinability and the dimensional precision of wear-resistant products can be improved, the service life of the wear-resistant products can be prolonged, and the processing efficiency can be improved.

The invention relates to the field of polymer composite materials and functional films, and provides a cast film for a lithium ion battery, which is characterized in that the cast film is of a laminated composite structure, and the laminated composite structure comprises a support layer and an interface functional layer; the supporting layer comprises polymer fibers and boron nitride nanosheets which are dispersed in a three-dimensional network of the polymer fibers in a highly oriented manner; wherein the included angle between the plane normal direction of the boron nitride nanosheet and the thickness direction of the cast film is less than 30 degrees; the interface functional layer comprises a hyperbranched polymer matrix and LLZO nanowires which are distributed in the hyperbranched polymer matrix in a gradient manner; the surface, deviating from the supporting layer, of the interface functional layer is grafted with a zwitterionic polymer brush through chemical bonding; wherein the surface density of the LLZO nanowire is gradually reduced from the surface, grafted with the zwitterionic polymer brush, of the interface functional layer to the direction of an interface combined with the supporting layer; the cast film has good electrochemical performance, interface stability and safety performance.

This invention provides a high weather-resistant three-color paint and its preparation method. The high weather-resistant three-color paint includes a white primer, a red primer, a blue primer, a topcoat, a clear coat, and a curing agent. Modified silica is added to the white primer, red primer, blue primer, topcoat, and clear coat. The modified silica is obtained by copolymerizing hydroxyl hyperbranched polymer-coated nano-silica, 2,4-dihydroxybenzophenone-grafted cyanuric chloride, and hydroxyl acrylate. This modified silica possesses a three-dimensional cross-linked network structure, which directly enhances the mechanical properties of the paint film. It also incorporates abundant ultraviolet absorbing groups, significantly improving the weather resistance of the paint film. Simultaneously, the large number of active hydroxyl groups it contains enhances the adhesion of the paint film. During the curing process, the isocyanate groups of the curing agent combine with the hydroxyl-containing components in the system to form a highly integrated and dense paint film structure, further improving the mechanical properties, weather resistance, and optimizing acid and alkali resistance of the paint film.

The invention discloses a preparation method and application of hyperbranched polymer toughened epoxy resin and a secondary recycling method of the epoxy resin, and relates to the technical field of epoxy resin. The invention aims to solve the problems that the traditional thermosetting epoxy resin is difficult to recover and the toughness of the recovered thermosetting epoxy resin does not reach the standard. The method comprises the following steps: mixing the epoxy resin degradation product, the bisphenol A epoxy resin, the anhydride curing agent and the hyperbranched siloxane polymer, and stirring for 30-45 minutes at the temperature of 80-100 DEG C; adding a tertiary amine accelerant, uniformly mixing, and injecting into a mold; the mold is placed in a vacuum environment at the temperature of 60-80 DEG C for defoaming, curing is conducted for 1.8-2 h at the temperature of 120-130 DEG C, then the temperature is increased to 150-160 DEG C, and curing continues to be conducted for 1.8-2 h. The invention can obtain the preparation method and the application of the hyperbranched polymer toughened epoxy resin and the secondary recycling method of the epoxy resin.

The invention discloses a transition metal ion chelated polymer electrolyte, a preparation method and an electrochemical device. The polymer electrolyte is a mixture of a styrene-maleic anhydride grafted hyperbranched polymer and an alkali metal salt of a functional compound, and the styrene-maleic anhydride grafted hyperbranched polymer is prepared on the basis of a polyamine branched polymer and a styrene-maleic anhydride copolymer. The functional compound is a polydentate ligand containing a carboxylic acid group and a nitrogen-containing aromatic heterocyclic structure unit or an arylamine structure unit, and the alkali metal salt is a lithium salt or a sodium salt. According to the invention, the functional compound containing the carboxylic acid group and the nitrogen-containing aromatic heterocyclic ring or arylamine is used as a carrier of the alkali metal ions and a scavenger of the transition metal ions at the same time, so that the cross pollution source of the transition metal ions is eliminated; meanwhile, the ionic conductivity and safety of the electrochemical device are improved by utilizing the coordination of a three-dimensional network of the polymer and a molecular trap of the functional compound, and the dendritic crystal strength is inhibited, so that the interface stability of the electrode is improved.

The invention discloses a photovoltaic water-blocking and oxygen-blocking butyl rubber, the photovoltaic water-blocking and oxygen-blocking butyl rubber is composed of butyl rubber, polyisobutene and a functional auxiliary agent, the functional auxiliary agent at least contains a hyperbranched polymer, and the tail end of the hyperbranched polymer is vinyl. The photovoltaic water-blocking and oxygen-blocking butyl rubber has the characteristics of good component compatibility, good water-blocking and oxygen-blocking performance and good anti-aging performance.

The invention discloses a flame-retardant wear-resistant epoxy resin cable material and a preparation method thereof, and relates to the technical field of cable sheaths and insulating materials. The formula comprises bisphenol A epoxy resin, a curing agent, a hyperbranched polymer, a reactive nano mica sheet, phosphorus-nitrogen flame-retardant core-shell microspheres, an accelerant and a wetting dispersant. According to the invention, the technical contradiction that the toughness, wear resistance and flame retardance of the epoxy resin are difficult to synergistically improve is effectively improved by using the three self-prepared components, namely the hyperbranched polymer containing the dynamic disulfide bond, the nano mica sheet of which the surface is grafted with the liquid crystal unit and the phosphorus-nitrogen flame-retardant microsphere with the core-shell packaging structure. The material disclosed by the invention has high toughness, high wear resistance and excellent flame retardance while keeping good processability and electrical insulating property, and is suitable for sheaths and insulating layers of high-performance cables.

The invention discloses an electronic product rear cover with burnt-out textures and a preparation method thereof, and relates to the technical field of electronic product rear covers, burnt-out cloth is adopted, the burnt-out cloth has rich colors and texture patterns, the specific colors and patterns can be set through lasers according to needs, pattern printing is not needed, and the production efficiency can be improved. According to the application, the glass fiber cloth is soaked in the modification treatment liquid containing the sulfydryl-terminated hyperbranched polymer for click reaction, so that the sulfhydrylated glass fiber cloth is prepared, and the strength of the glass fiber layer is improved. The connecting layer is the modified epoxy resin, and the modified epoxy resin improves the bonding strength between the connecting layer and the glass fiber layer and between the connecting layer and the scratch-resistant layer. And the impact resistance of the electronic product rear cover is improved, so that the stress dispersion is better realized.

The invention discloses low-temperature silver paste and a preparation method thereof. The conductive silver paste comprises the following components in parts by weight: 7-12 parts of matrix resin, 1-2.5 parts of a curing agent, 1-2.5 parts of a dispersing agent, 0.5-1.5 parts of a coupling agent, 75-85 parts of conductive silver powder and 3-6 parts of a thixotropic anti-settling agent, the matrix resin is low-viscosity liquid epoxy resin, and the viscosity of the matrix resin is 200-1000 cP; the curing agent is a latent epoxy curing agent, and the deblocking temperature of the curing agent does not exceed 90 DEG C; the dispersing agent is a hyperbranched polymer type dispersing agent; the conductive silver powder is a combination of micron-sized flaky silver powder and submicron-sized spherical silver powder; the thixotropic anti-settling agent is a uniform mixture formed by grinding and dispersing matrix resin, a dispersing agent, high-conductivity carbon black and expanded graphite powder. The low-temperature silver paste has the beneficial effects that poor conductivity caused by grouting defects is prevented, and the low-temperature silver paste has excellent grouting quality, so that the prepared low-temperature silver paste has excellent conductivity and can still keep a stable state under the condition of high silver powder filling amount.

The invention discloses a microwave curing-based coating material and a preparation method thereof. The microwave curing-based coating material comprises mixed resin, a microwave absorbing material, cellulose ether, a curing agent, a hyperbranched polymer, an active monomer, polyglycol modified epoxy acrylate, o-cresol glycidyl ether, p-hydroxyanisole, a plasticizer and an accelerant. During preparation, the mixed resin, the hyperbranched polymer, the active monomer, the polyglycol modified epoxy acrylate and the o-cresol glycidyl ether are mixed and stirred, the p-hydroxyanisole, the plasticizer and the accelerant are sequentially added and stirred, the microwave absorbing material and the cellulose ether are added and stirred, and the curing agent is added and stirred. The coating material disclosed by the invention can be quickly cured within dozens of seconds to dozens of seconds based on a microwave condition, has good corrosion resistance and adhesive property, and fundamentally and effectively solves the problem of high shrinkage rate generally existing in the adoption of the existing light-cured resin.

The present application relates to a kind of hyperbranched polymer, nano preparation and its preparation method and application, belong to functional medical material and nanotechnology field.The hyperbranched polymer of the present application can be broken in ROS environment Release dihydrolipoic acid, play the role of antioxidant, be reduced to lipoic acid in vivo, and then play its role as coenzyme, participate in mitochondrial tricarboxylic acid cycle, restore mitochondrial function, thereby play the role of antioxidant and play the role of treating ischemic stroke.The nano preparation provided by the present application can be quickly distributed to brain in a short time, temporarily increase the paracellular permeability of BBB by inhibiting the expression of multi-drug resistance protein P-gp and ATP-dependent drug efflux protein on BBB, and the process of opening BBB by borneol is physiological and reversible, without destroying the structural integrity of blood-brain barrier.

This application relates to a process for preparing a filled wax-free adsorption pad, which is obtained by the following method: Step 1) PE foam material is foamed to form a porous structure of several foam skins; a modified PE board has several slots; Step 2) Adhesive is applied to the surface of the foam skins, and then the adhesive side of the foam skins is attached to the slots of the modified PE board, with the foam skins and slots corresponding one-to-one, and fixed to obtain a filled wax-free adsorption pad; both the PE foam material and the modified PE board contain an acid-resistant blend modifier; the acid-resistant blend modifier is composed of nano-lithium-based inorganic bentonite, polystyrene-poly(heptaisobutyl cage-type polysilsesquioxane alkylpropyl-methacrylate), maleic anhydride graft, and aromatic polyamide hyperbranched polymer. The filled wax-free adsorption pad obtained by the above technical solution ensures basic performance, further improves acid resistance, reduces wear, breakage, swelling, etc., and improves service life.

The invention provides a method for removing heavy metals by acidizing bleaching earth. The heavy metals in the bleaching earth are removed by using a heavy metal adsorbent. Firstly, acrylate reacts with diethanol amine to generate an esterification product, then the esterification product reacts with trimethylolpropane to form a hydroxyl-terminated hyperbranched polymer, and then the hydroxyl-terminated hyperbranched polymer reacts with isocyanate acrylate to introduce double bonds to obtain hyperbranched acrylate. Meanwhile, sodium alginate reacts with 4-chlorophenylboronic acid to obtain boric acid modified sodium alginate, then the boric acid modified sodium alginate reacts with tannic acid to introduce a large amount of hydroxyl groups, and finally the boric acid modified sodium alginate reacts with 3-aminopropanol vinyl ether to introduce double bonds, so that the sodium alginate compound containing double bonds is prepared. And copolymerizing the two monomers with acrylic acid, N-(2-aminoethyl) acrylamide and 2-acrylamido-2-methylpropanesulfonic acid to obtain the adsorbent with a three-dimensional network structure and multiple functional groups. Through the treatment, the heavy metal content of the bleaching earth is obviously reduced, no foreign impurities exist, and the functions of high decolorization rate and strong adsorbability are reserved.

The invention relates to a polymer blend for electrostatic spinning, a degradable microfiber filtering material and a preparation method and application thereof. The polymer blend for electrostatic spinning comprises a polymer and a plasticizer, and the plasticizer is a hyperbranched polymer. In the electrostatic spinning process, through addition of the hyperbranched polymer and spinning process control, the high-efficiency and low-resistance microfiber filtering material which is free of thermal bonding among fibers, has a fluffy three-dimensional network structure and has certain mechanical properties is prepared. The preparation process is simple, the preparation of the microfiber filtering material can be realized under relatively low spinning voltage, and the safety and the economical efficiency of the spinning process are improved; the filtering material has a wide application prospect in the fields of masks, protective clothing, operating gowns, air purification, especially high-efficiency air filtration under the action of a certain external field force.