1119 results about "Molecular materials" patented technology

The invention discloses spherical aluminum oxide and a silicone rubber heat conduction composite material thereof, and belongs to the technical field of functional polymer materials. The spherical aluminum oxide is subjected to surface modification through an amphiphilic fluorosilicone heat conduction interface synergist; comprising the following raw materials in parts by weight: 100-200 parts of vinyl silicone oil, 1-6 parts of side hydrogen-containing silicone oil, 1-6 parts of end hydrogen-containing silicone oil, 0.2-2 parts of a platinum catalyst, 0.01-0.1 part of an inhibitor and 2500-6000 parts of amphiphilic fluorine-silicon heat-conducting interface synergistic spherical aluminum oxide powder. Through surface modification of spherical aluminum oxide, the prepared silicone rubber heat-conducting composite material realizes synergistic gain of heat conduction, insulation and flexibility, and can meet the requirements of multiple fields such as power battery pack heat dissipation gaskets, high-frequency circuit packaging and wearable equipment.

The invention discloses a polylactic acid injection molding mold based on a gradient heat conduction composite structure and a heat management method thereof, and belongs to the technical field of high polymer material molding processing equipment.The polylactic acid injection molding mold comprises a) a surface high heat conduction layer which is made of a copper-based composite material, has the heat conduction coefficient larger than or equal to 400 W / m.K and is used for rapidly and directionally transferring heat to the surface of a mold cavity; and b) an intermediate transition layer composed of a titanium alloy porous structure. High-efficiency production is realized through innovative design and advanced technology. Integrated metallurgical bonding of the gradient heat conduction structure is achieved through the selective laser melting technology, and the heat flow directivity is enhanced; the dual-mode cooling system is combined with closed-loop temperature control, and the temperature is accurately regulated and controlled; the high-performance material improves the comprehensive performance of the mold; and the structural stability is guaranteed through accurate technological parameters. According to the thermal management method, through multi-physical field simulation optimization, rapid heating and cooling are achieved, the forming period is shortened to 16-18 seconds, the calculation efficiency is improved by 80%, and the production efficiency and the product quality are effectively improved.

The invention discloses a multi-layer controllable degradation coating composition as well as a preparation method and application thereof, and belongs to the field of biodegradable high polymer materials and coating compositions. The coating composition comprises an outer protective layer and an inner functional layer, and the inner functional layer is arranged between a substrate and the outer protective layer and comprises a plurality of microcapsules. The key innovation lies in that the microcapsule encapsulates an enzyme capable of catalytically degrading the outer protective layer and is configured to be released after a predetermined delay time. The pH buffer system is integrated in the inner functional layer, and an optimal catalytic microenvironment is created for released enzyme, so that the outer protective layer is actively and quickly degraded, and programmable time-controlled removal is realized. The problem that the degradation rate of an existing biodegradable material is passive and uncontrollable is solved, and the coating has a remarkable application value in the field of seed coating or fertilizer controlled release by endowing the coating with a unique two-stage degradation characteristic.

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of linear low-density polyethylene, 12 to 18 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of nano silicon dioxide, 3 to 7 parts of organic montmorillonite, 1.5 to 3.5 parts of hindered amine light stabilizer, 1.5 to 2.5 parts of antioxidant 1010, 0.8 to 1.2 parts of calcium stearate, 0.8 to 1.2 parts of zinc stearate, 0.8 to 1.2 parts of silane coupling agent and 4 to 6 parts of maleic anhydride grafted polyethylene. The composite material is prepared from the following components in parts by weight: 1.5-3.5 parts of a quaternized chitosan-nano silver compound, 6-9 parts of a modified toughening agent, 4-7 parts of a modified heat-resistant agent, 1.5-3.5 parts of a processing aid, 0.15-0.35 part of dibenzoyl peroxide and 0.5-1.5 parts of a nucleating agent DBS. The composite material is excellent in comprehensive performance, high in strength, good in flexibility and puncture resistance, excellent in aging resistance, heat resistance, chemical resistance and antibacterial property, good in processability, capable of meeting the requirements of multiple fields such as packaging and agriculture, scientific in preparation method and high in practical value.

The invention discloses a high-weather-resistance halogen-free flame-retardant polyamide composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The composite material comprises the following raw materials in parts by weight: 20-60 parts of polyamide resin A, 0-20 parts of polyamide resin B, 10-50 parts of glass fibers, 0.1-2 parts of an ultraviolet absorbent, 0.1-2 parts of a free radical scavenger, 10-20 parts of a halogen-free flame retardant, 1-15 parts of a flame retardant synergist and 0.5-5 parts of a conventional auxiliary agent. The preparation method comprises the following steps: uniformly mixing the polyamide resin A, the polyamide resin B, the ultraviolet absorbent, the free radical scavenger, the flame-retardant synergist and the conventional auxiliary agent in a high-speed mixer according to the proportion to obtain a mixture, then adding the mixture into a double-screw extruder through main feeding, side feeding of the halogen-free flame retardant through a first side feeding and side feeding of the glass fiber through a second side feeding, and carrying out extrusion molding to obtain the flame-retardant polyamide composite material. And carrying out melt blending and extrusion granulation to obtain the high-weather-resistance halogen-free flame-retardant polyamide composite material. The obtained high-weather-resistance halogen-free flame-retardant glass fiber reinforced polyamide composite material is excellent in mechanical property, flame retardance and weather resistance.

The invention discloses a technology for manufacturing a thin film by recycling and calendering a polytetrafluoroethylene material, and belongs to the technical field of high polymer material recycling and processing, the technology for manufacturing the thin film by recycling and calendering the polytetrafluoroethylene material comprises the following steps: crushing waste products, and carrying out three-stage screening impurity removal and melt index detection; after being cleaned by supercritical carbon dioxide, the qualified material is mixed with industrial by-product filler, waste tire rubber powder and the like, low-temperature mixing is conducted through a double-screw extruder, and mixing parameters are automatically regulated and controlled through a tension sensor; performing calendaring forming by a five-roller calendaring unit, preheating the first two rollers, performing differential stretching by the middle three rollers, engraving a micro groove by the third roller, and controlling the thickness precision to be + / -3% by an online thickness gauge; the film is slit after being compounded according to requirements, and scrap edges are crushed and recycled. The method realizes efficient recovery of waste polytetrafluoroethylene, and has the advantages of thorough impurity removal, stable performance, environmental protection and energy saving.

The invention relates to a special engineering plastic polyethersulfone microcellular foam material and a preparation method thereof, belongs to the technical field of high polymer material foaming, and solves the problem that high foaming ratio, a microcellular structure and excellent mechanical properties cannot be simultaneously obtained when a macromolecular polyethersulfone material adopts an injection foaming technology in the prior art. The method comprises the following steps: step 1, pretreating raw materials; 2, melt blending: mixing the PES base material, the second component, the functional filler, the cross-linking agent and the foam stabilizer, carrying out melt blending, granulating, and drying to obtain granules; 3, injection foaming: injecting the granules into an injection machine, adding a composite foaming agent into the injection machine, mixing, and performing injection foaming molding to obtain an injection-molded foaming material; and 4, curing: irradiating the injection-molded foam material with rays to obtain the special engineering plastic PES microcellular foam material.

The invention provides an efficient composite material manufacturing method based on front-end polymerization initiation point design, relates to manufacturing of forming materials containing macromolecular substances, and belongs to the technical field of common technological processes of processing and batching of macromolecular materials. According to the invention, the epoxy resin composite material with excellent mechanical properties is rapidly prepared with low energy consumption by preparing the epoxy resin front-end polymerization solution and initiating front-end polymerization at multiple points. The method has the advantages of being high in designability, easy to operate and the like, and rapid and energy-saving manufacturing of the epoxy resin and the composite material thereof is achieved while the mechanical property is maintained through multi-point initiation of front-end polymerization. The method has a wide application prospect in batch production of epoxy resin and composite materials and manufacturing of large-scale structures.

The invention discloses a super-strong mute building drainage pipe and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by mass: 100 parts of high-density polyethylene, 5-7 parts of a cold-resistant toughening agent, 8-12 parts of a synergist, 8-10 parts of a sound insulation filler and 0.3-0.5 part of an antioxidant. By introducing the synergist prepared from the components such as polyamine polyether methylene phosphonic acid, zinc nitrate hexahydrate, magnesium nitrate hexahydrate and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drainage pipe can be effectively improved; by introducing the sound insulation filler prepared from the modified halloysite nanotubes, hydroxyl-terminated polydimethylsiloxane, aziridine cross-linking agent and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drain pipe are further improved. Therefore, the drainage pipe prepared by the invention has a wider application prospect.

The utility model relates to the field of high polymer materials, in particular to a polyaryletherketone resin pre-impregnated line material winding and forming device which is used for preparing polyaryletherketone resin pre-impregnated line materials and comprises a translation table top, a material impregnating groove, a guide column and a tensioning pulley. According to the present invention, with the structural design such as a driving system and the like, the carbon fiber can be immersed in the polyaryletherketone resin at low cost and high efficiency to obtain the sheet-shaped prepreg, the sheet-shaped prepreg is subjected to hot pressing to form the polyaryletherketone resin-based composite material of the fiber fabric, and the composite material has characteristics of excellent strength, wide application, and easy promotion and application. Wide application prospects are realized in the fields of aviation, aerospace equipment and high-end civil use.

The invention discloses a degradable express bag material and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a degradable express bag material. The composite material is prepared from the following raw materials in parts by weight: 40 to 50 parts of poly (butylene adipate-co-terephthalate), 20 to 30 parts of polycaprolactone, 5 to 8 parts of modified bamboo fiber, 2 to 4 parts of modified nano montmorillonite, 3 to 6 parts of tributyl citrate, 0.1 to 0.3 part of antioxidant 1076, 1 to 2 parts of iron dithiocarbamate master batch, 2 to 3 parts of maleic anhydride grafted poly (butylene adipate-co-terephthalate) and 0.3 to 0.6 part of zinc stearate. 0.1 to 0.3 part of baicalein; and 1 to 3 parts of chitosan-sorbitol composite coating liquid. According to the degradable express bag material, poly (butylene adipate-co-terephthalate) and polycaprolactone are used as main degradable raw materials, modified bamboo fibers and modified nano-montmorillonite are matched to enhance the mechanical property, an antioxidant 1076, baicalein and the like are added to guarantee the stability and functionality, temperature is accurately controlled in the preparation process, multi-step modification is adopted for optimizing component combination, and the degradable express bag material is prepared. The performance is improved through the composite coating, degradability is achieved, and good usability is achieved.

The invention relates to high-wear-resistance plastic particles and a preparation method thereof, and belongs to the technical field of high polymer materials. The high-wear-resistance plastic particles comprise the following components in parts by weight: 60-80 parts of polyphenylene sulfide, 1-4 parts of a lubricant, 0.1-0.5 part of an antioxidant, 20-40 parts of glass fibers, 1-4 parts of a modified flame retardant and 5-15 parts of a high-temperature-resistant toughening agent, the high-wear-resistance plastic particle prepared by the invention not only has a good flame-retardant effect, but also has excellent high-temperature-resistant and toughening effects.

The invention discloses a carbon fiber-glass bead synergistically reinforced PA56 / PPO composite material and a preparation method thereof, and relates to the technical field of high polymer materials. The PA56 / PPO composite material comprises the following components in percentage by mass: 20%-40% of PA56 resin, 20%-30% of PPO resin, 20%-40% of modified carbon fibers, 10%-20% of silane modified glass beads, 0.5%-5% of a toughening agent and 0.5%-5% of a compatilizer. Through compound use of the modified carbon fibers and the silane modified glass beads, the addition amount of a single carbon fiber material can be reduced, and weight reduction is realized while the cost is reduced; the toughening agent has good compatibility with matrix resin and can generate a better toughness modification effect after being added into a PA56 / PPO system, and the added compatilizer can improve the interfacial effect among the components so as to effectively improve the mechanical properties and antistatic properties of the composite material. The carbon fiber-glass bead synergistically reinforced PA56 / PPO composite material provided by the invention is balanced in rigidity, toughness and antistatic property, and can be used in automotive electronic and electrical products with requirements on high strength, high toughness and antistatic property.

The invention relates to microcapsule phase change cooling liquid and a preparation method thereof, and belongs to the technical field of high polymer materials. The microcapsule phase change cooling liquid comprises the following components in parts by weight: 40-55 parts of ethylene glycol, 30-45 parts of deionized water, 5-14 parts of a core material, 3-6 parts of a wall material, 0.1-0.4 part of a dispersion stabilizer, 0.1-0.4 part of a corrosion inhibitor and 0.1-0.4 part of a modified antirust agent, the microcapsule phase change cooling liquid prepared by the invention not only has a good cooling effect, but also has excellent rust-proof and flame-retardant effects.

The invention relates to the technical field of high polymer materials, and discloses a high-chemical-resistance TPO material which comprises the following components in parts by mass: 55-65 parts of polypropylene; 35 to 45 parts of a styrene-ethylene / butylene-styrene block copolymer; 0.4 to 0.6 part of a furan end-capping reagent; 0.2 to 0.4 part of a maleimide cross-linking agent; 4-6 parts of modified shell powder; 8 to 12 parts of epoxidized cardanol; 2-4 parts of a heat-sensitive microcapsule, wherein the heat-sensitive microcapsule comprises a shell layer and an inner core; and 0.5 to 1.5 parts of a nano cellulose surface treating agent. Through the synergistic effect of a dynamic cross-linked network and fluorocarbon chain surface modification, when the material is in contact with acid, alkali and an organic solvent, reversible cross-linked bonds release local stress through a fracture-reconstruction mechanism, and microcrack propagation is inhibited; and the compact fluorocarbon layer on the surface forms a chemical inert barrier, so that the permeation rate of a corrosive medium is remarkably reduced, and the structural stability and long-term durability of the material in a complex chemical environment are guaranteed.

The invention discloses an automotive polypropylene material with good appearance and easy paint spraying and a preparation method thereof, and belongs to the technical field of high polymer materials. The polypropylene material is prepared from the following raw materials in parts by mass: 45 to 65 parts of photo-activated grafted polypropylene resin, 10 to 20 parts of a multifunctional modifier with a core-shell structure, 8 to 15 parts of a bio-based nanofiber reinforcing agent, 5 to 10 parts of a temperature-sensitive shape memory toughening agent, 0.1 to 0.5 part of a photocatalytic anti-pollution antioxidant, 0.1 to 0.5 part of an ionic liquid-based lubricant and 0.5 to 2 parts of a bionic nano adhesion accelerant. The raw materials are subjected to melt blending, extrusion and granulation through a double-screw extruder, and finally drying and radio frequency plasma treatment are performed to obtain the polypropylene material. The material does not need complex pretreatment, forms super-strong adhesive force with paint by virtue of multiple innovative mechanisms, and is stable in a complex environment. The molded product has the advantages of top-grade appearance, smooth and defect-free surface, good gloss and color stability and excellent comprehensive performance, and can meet the strict use and processing requirements of automobiles.

The invention discloses a recycled modified polypropylene composite material preparation system and a resource recovery method, and relates to the technical field of high polymer material science and engineering. The raw material pretreatment module adopts near infrared spectrum classification, multi-stage cleaning, drying and crushing, and the moisture content is controlled to be less than 0.5%; the melt blending module melts the materials at 180-220 DEG C, modifiers and additives are added, and vacuum degassing is performed to remove impurities; adding a reinforcing agent into the modification reinforcing module, and performing ultrasonic dispersion and dynamic vulcanization; the molding processing module is used for manufacturing a product through extrusion, injection molding or calendaring; the quality detection module is used for detecting mechanical and thermal properties; the waste recovery module is used for crushing and melting granulation to realize a closed loop; the intelligent control module uses a PLC to coordinate each module. Integrated treatment of waste polypropylene is achieved, the purity of raw materials and the performance of a composite material are improved, the resource utilization rate is increased through closed-loop recycling, manual intervention is reduced through intelligent control, product stability is guaranteed, economic and environment-friendly benefits are achieved, and high-valued circulation of waste plastic is promoted.

The invention relates to the field of high polymer materials, and particularly discloses a rubber-plastic composite material for a wear-resistant high-pressure air pipe and a production method of the rubber-plastic composite material. The composite material comprises the following raw materials in parts by weight: 100 parts of PVC; 36-45 parts of a plasticizer; 4-6 parts of a stabilizer; 8 to 13 parts of polytetrafluoroethylene; 3 to 6 parts of nano silicon dioxide; 22 to 30 parts of TPU (Thermoplastic Polyurethane); 23 to 30 parts of butyronitrile powder; and 2-4 parts of a lubricant. The production method comprises the following steps: uniformly mixing the raw materials according to the ratio, and extruding and granulating. The composite material has the advantage of high wear resistance.

The invention relates to an anti-aging CPP film and a preparation method thereof, and belongs to the technical field of high polymer materials. The anti-aging CPP film comprises the following components in parts by weight: 70-90 parts of PP resin, 0.1-0.5 part of a lubricant, 2-10 parts of an antioxidant, 1-4 parts of a dispersant and 1-5 parts of an anti-aging modifier, the anti-aging CPP film prepared by the invention not only has a good anti-aging effect, but also has an excellent high-temperature-resistant effect.

The invention relates to the technical field of solar cells, in particular to a hole transport layer-based perovskite solar cell preparation method, which comprises the following steps of: (1) cleaning a transparent conductive layer; (2) a hole transport layer is prepared on the transparent conductive layer by adopting a self-assembly molecular material and an additive, the self-assembly molecular material is phosphate molecules, and the additive is a nitrogen-containing high polymer material; (3) preparing a perovskite light absorption layer on the hole transport layer; (4) preparing a passivation layer on the perovskite light absorption layer; (5) preparing an electron transport layer on the passivation layer; (6) preparing an interface buffer layer on the electron transport layer; and (7) preparing an electrode layer on the interface buffer layer. According to the method, the additive is introduced into the hole transport layer of the perovskite solar cell, so that the agglomeration phenomenon of self-assembled molecules is reduced, the interface performance of the perovskite solar cell is remarkably optimized, and the photoelectric conversion efficiency and stability of the perovskite solar cell are improved.

The invention relates to the field of high polymer materials, and particularly discloses a high-oxygen-barrier moisture-barrier PE film and a process. The high-oxygen-barrier moisture-barrier PE film comprises a corona layer, a barrier layer and a heat sealing layer which are connected in sequence, the barrier layer comprises the following raw materials in parts by weight: 90-95 parts of polyethylene and 5-10 parts of polyvinylidene chloride, and the heat sealing layer is made of a polyethylene material; in addition, the preparation method provided by the invention has the advantages that the oxygen and moisture resistance of the polyethylene single film is improved, and meanwhile, the printing requirement is met.

The invention discloses a low-dielectric-constant polyamide material, and relates to the technical field of high polymer materials. The invention discloses a low-dielectric-constant polyamide material. The composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of polyamide 66, 5 to 10 parts of polytetrafluoroethylene micro powder, 8 to 12 parts of modified porous siloxane microspheres, 3 to 7 parts of modified nano zinc oxide, 10 to 15 parts of glass fibers, 4 to 8 parts of polyether-ether-ketone, 1 to 3 parts of graphene nanosheets, 3 to 5 parts of fluororubber, 1 to 2 parts of a titanate coupling agent, 0.3 to 0.7 part of an antioxidant 1010, 0.5 to 1.0 part of ethylene bis stearamide and 0.1 to 0.3 part of an ultraviolet absorbent UV-531. The low-dielectric-constant polyamide material has the remarkable advantages that the raw materials are scientifically proportioned, and various modified components are contained to enhance the performance; all the components are subjected to special treatment, so that the compatibility is good; the preparation process is rigorous, and the material has excellent dielectric properties; and the material also has good heat resistance and weather resistance and strong mechanical properties, and is suitable for various scenes with high dielectric constant requirements.

This application relates to the technical field of polymer materials, and specifically discloses a puncture-resistant film and its preparation process. A puncture-resistant film is composed of an outer layer, an intermediate layer, and an inner layer, and the outer layer, the intermediate layer, and the inner layer are all bonded by a solvent-free adhesive; the outer layer is a PET film layer; the intermediate layer is a nylon film layer; the inner layer is mainly prepared from the following raw materials in parts by weight: 36-48 parts of LDPE resin, 20-38 parts of LLDPE resin, 5-10 parts of MLLDPE resin, 1-5 parts of HDPE resin, 5-8 parts of nano-organic montmorillonite, 0.5-1 part of nano-silica sol, 5-8 parts of compatibilizer, 0.3-0.5 part of antiblocking agent, 0.3-0.5 part of slip agent, 0.1-0.3 part of antistatic agent, and 0.1-0.2 part of processing aid. This application can improve the puncture resistance of the film.

The invention belongs to the technical field of molecular materials, and particularly relates to a quick-curing acrylate glue preparation process based on a microcapsule-coated initiator, which comprises the following steps: providing a basic acrylate mixture, adding a microcapsule-coated dicumyl peroxide initiator, and adjusting the components of a microcapsule shell to adapt to different rupture temperature requirements. Uniformly heating the mixture in a preset temperature control environment, adjusting the stirring rate, monitoring the stability of the microcapsules, recording the change, increasing the external pressure to break the microcapsules to release the initiator, controlling the external pressure value to ensure that the initiator effectively triggers the polymerization reaction, and finally completing the curing process of the acrylate glue. According to the method, the cracking temperature or cracking strain of the microcapsule is accurately controlled, an ideal curing rate is ensured to be obtained under specific application conditions (such as low-temperature rapid curing or high-temperature slow curing), the stability of the product is remarkably improved, the application range of the product is remarkably widened, and the production efficiency and the performance of the final product are enhanced.

The invention discloses a preparation method of a high-transparency and high-hardness PC-PMMA alloy, and relates to the field of high polymer materials. Comprising the following steps: S1, blending, extruding and granulating PC, PBAT, PETS and a chain extender to obtain PC master batches with the refractive index of less than or equal to 1.58; s2, PMMA, SAN and the St-MMA-GMA terpolymer are blended, extruded and granulated, and PMMA master batches with the refractive index larger than or equal to 1.56 are obtained; s3, the PC master batch, the PMMA master batch, the compatilizer, the antioxidant and the lubricant are blended, extruded and granulated, and the high-transparency and high-hardness PC-PMMA alloy is obtained; according to the method disclosed by the invention, the refractive index difference between the PC master batch and the PMM master batch is reduced, the flowability is closer, the compatibility is higher, and the PC / PMMA alloy with high transparency, high hardness and good mechanical properties is obtained.

The invention relates to the technical field of polyamide high polymer materials, in particular to a glass fiber reinforced PA6 composite material and a preparation method thereof. The glass fiber reinforced PA6 composite material comprises the following components in percentage by weight: 20-50% of PA6 resin; 50 wt%-80 wt% of flat glass fibers; 0 wt%-2 wt% of an antioxidant, which is not 0; 0 wt%-1 wt% of a lubricant, which is not 0; 0 wt%-2 wt% of black master batch, which is not 0; the sum of the dosages of the components is 100%. According to the glass fiber reinforced PA6 composite material provided by the invention, only three auxiliary agents are used, the components are simple, the components can be well matched in a specific ratio range, and the obtained glass fiber reinforced PA6 composite material has high glass fiber content, good melt processing characteristics, excellent comprehensive mechanical properties, good barrier property and apparent quality, and can be widely applied to the field of glass fiber reinforced plastic. And the forming processing method is simple.

The invention relates to the technical field of high polymer materials, and particularly discloses a production process of spherical wax micropowder, which comprises the following steps: melting solid wax into a wax melt, and preserving at a constant temperature in an environment which is at least 20 DEG C higher than the melting point of the wax; the wax melt and hot water are mixed according to the flow ratio of 1: (10-20) and then sprayed out to form mist spray, the mist spray enters mist spray pool water with the temperature of the wax melting point + / -5 DEG C, and wax liquid drops in the mist spray are subjected to condensation polymerization in the mist spray pool water to form spherical wax melt; the spherical wax melt gradually rises into cooling water flow in the water of the spraying pool, the temperature of the cooling water flow is 10-20 DEG C lower than the wax melting point, the spherical wax melt flows in the cooling water flow and is cooled, the spherical wax melt is separated from the cooling water flow, and dewatering and drying are conducted to obtain the spherical wax micro powder. The process can improve the sphericity and particle size uniformity of the wax micro powder.

The invention discloses a high-weldability modified TPU film and a preparation method thereof, and belongs to the technical field of high polymer material modification. The film comprises the following components: 100 parts by weight of TPU resin; 1-5 parts by weight of a filler with a particle size of 1-5 [mu] m after surface treatment; 0.5 to 1.2 parts by weight of an antioxidant; wherein the filler subjected to surface treatment is obtained by cleaning a filler raw material with an oxalic acid solution and coating the filler raw material with a titanate coupling agent for surface treatment. The filler subjected to surface treatment is added, and an optimized melt extrusion process is combined, so that the welding strength of the film is remarkably improved, the heat sealing stripping force is greatly improved, and the problem that a welding surface is easy to crack is thoroughly solved; meanwhile, the intrinsic performance of TPU is perfectly reserved, the elongation at break is maintained, the transparency decrease amplitude is small, the thermal aging resistance is excellent, and the double requirements for high-strength welding and flexibility maintaining in the fields of automobile sealing parts, electronic packaging and the like are completely met.

The invention relates to the technical field of high polymer materials, and particularly discloses a preparation method of a full-biodegradable film based on PPC blending modification, which comprises the following steps: step S1, preparation of resin for film blowing: uniformly mixing PBAT, modified lignin, functionalized PPC, a lubricant and a photoinitiator according to a mass ratio of (45-65): (15-30): (35-45): (0.1-0.5): (0.6-0.8), and performing ultraviolet irradiation and extrusion to obtain the resin for film blowing; s2, performing blow molding to form a film; the modified lignin and the functionalized PPC are added, the modified lignin contains hydroxyl, carboxyl, a lignin structure and an ester group, not only can be subjected to an end-capping reaction with the functionalized PPC, but also has good compatibility with PBAT, the functionalized PPC contains a disulfide bond, a-Si-O-Si-structure and a sulfydryl group, and through the combined action of the disulfide bond, the-Si-O-Si-structure and the sulfydryl group, the modified lignin and the functionalized PPC can be subjected to an end-capping reaction, so that the PBAT can be subjected to an end-capping reaction; the weather resistance, the water vapor barrier property and the mechanical property of the film are improved.

The invention relates to a wear-resistant modified glass fiber and a preparation method thereof, and belongs to the technical field of high polymer materials. The wear-resistant modified glass fiber is prepared from the following components in parts by weight: 40 to 60 parts of SiO2, 10 to 15 parts of Al2O3, 20 to 30 parts of CaO, 1 to 3 parts of Fe2O3, 1 to 3 parts of CeO2, 2 to 10 parts of modified toughening agent and 2 to 10 parts of wear-resistant filler, the flexibility and elasticity of polydopamine in the modified toughening agent can reduce the generation and expansion of cracks, and polydopamine cooperates with modified silicon nitride to increase the toughness and the adhesiveness and bonding performance of polyethyleneimine, so that the material is not easy to damage when bearing an external force; graphite oxide in the wear-resistant filler endows strength and heat resistance, molybdenum disulfide provides lubricity, a pre-product contributes to improvement of interface performance, and polytetrafluoroethylene and molybdenum disulfide synergistically improve wear resistance and lubricity; the wear-resistant modified glass fiber prepared by the invention not only has a good toughening effect, but also has an excellent wear-resistant effect.