44results about How to "Fast degradation" patented technology

The invention discloses a modified Trim 21 (delta Trim 21)-based target protein degradation control system, which takes a modified protein delta Trim 21 degradation system as a basis, takes blue light, abscisic acid, Danoprevir and / or MK-5172 as inductors, controls the combination of target protein and delta Trim 21 by introducing and modifying a controllable protein dimerization system on the basis of the modified protein delta Trim 21 degradation system, and improves the target protein degradation control system. The protein targeted degradation capable of being modularly regulated and controlled is carried out. Two regulation and control modules, namely a target protein recognition module and a degradation module based on E3 ubiquitinase, are constructed by splitting and recombining a controllable protein dimerization system and a delta Trim 21 structural domain. The invention also discloses a degradation device comprising the system. The invention also discloses a method for accurately regulating endogenous proteins (degradation of proteins related to tumorigenesis) by using the programmable regulation type modular protein degradation device, so as to achieve the effect of specifically killing tumors. The invention also provides a eukaryotic expression vector and a regulation method of the programmable regulation type protein targeted degradation device.

The invention relates to the field of enzyme preparations, and discloses an enzyme preparation for catalytic degradation of bioplastics and a preparation method thereof, the enzyme preparation for catalytic degradation of bioplastics comprises the following components by weight: 25-50 parts of an enzyme, 1-8 parts of a catalytic additive, 2-10 parts of a stable dispersant, and 30-50 parts of a buffer solution; the catalytic additive is prepared by using calcium bentonite as a carrier to load nano titanium dioxide; the stabilizing dispersant is prepared by introducing polyethylene glycol monoallyl ether into a sodium lignin sulfonate structure by utilizing an initiator through an aqueous solution polymerization method, and by adding the catalytic additive and the stabilizing dispersant, the enzyme preparation is endowed with good degradation efficiency on bio-based plastics and the stability of an enzyme preparation system is improved.

The invention discloses functional injection type bionic hydrogel for promoting bone healing and a preparation method thereof, and relates to the technical field of medical instruments. The hydrogel has good functional characteristics, is a biomimetic material prepared on the basis of methacrylated gelatin, and aims to regulate and control the degradation rate, the drug release mechanism and diversified synergistic treatment and promote bone repair and regeneration; according to the hydrogel, matching of the degradation rate and the bone regeneration rate is achieved through reasonable matching, stem cell osteogenic differentiation and angiogenesis are promoted, ultrasonic controlled-release drug release and synergistic controlled-release of active factors are achieved, inflammation is reduced, and the bone repair process is promoted; the calcium phosphate bone cement provides biocompatibility and bone conductivity, and the nano clay releases active ions to improve the microenvironment and promote bone repair; in addition, the magnetic nanoparticles and a static magnetic field have synergistic interaction, the bone healing process is further accelerated, and treatment effect monitoring is enhanced through magnetic resonance imaging.

The invention discloses a municipal sewage treatment device, and relates to the technical field of sewage treatment, the municipal sewage treatment device comprises a supporting assembly, the supporting assembly comprises an aeration box, a water outlet pipe and a water inlet pipe, and the water outlet pipe and the water inlet pipe are fixed on the aeration box; the device further comprises a gas transmission assembly and a fermentation assembly; the fermentation assembly comprises a fermentation box; the fermentation box is located at the bottom of the aeration box; the gas transmission assembly comprises a vortex tube, a connecting tube, a nozzle, a gas transmission tube and a driving pump; the driving pump is fixed on the side wall of the fermentation box, the driving pump is fixedly connected with an air inlet of the vortex tube, and the driving pump conveys hot air in the fermentation box into the connecting tube through the vortex tube; the connecting pipe is located in the aeration box, and a plurality of gas conveying pipes are fixedly connected to the connecting pipe and located at the bottom of the aeration box; the multiple nozzles are fixedly connected to the air conveying pipe. The temperature in the sewage treatment tank can be increased to a range suitable for microbial metabolism and reproduction when the temperature is too low, the degradation speed of microorganisms on organic matters is increased, and the effluent quality of the sewage treatment tank is ensured.

The invention discloses oil exploitation sludge deep filtration treatment equipment, and relates to the technical field of oil exploitation equipment, the oil exploitation sludge deep filtration treatment equipment comprises a deep outer heating cylinder, the top of the deep outer heating cylinder is provided with a top cover, the bottom of the deep outer heating cylinder is provided with a bottom support, the deep outer heating cylinder is internally provided with a middle cylinder, the middle cylinder is internally sleeved with an inner filter cylinder, and the inner filter cylinder is internally provided with a spiral cone paddle; an upper connecting shaft penetrates through the middle part of the spiral cone paddle; according to the invention, premixing is carried out through an external mixing container, and free radical reaction is initiated at high temperature and high pressure by virtue of supercritical water, a strong oxidant and a chemical agent, so that the solvent sludge reaction time is remarkably shortened; the special structures of the heat-conducting sewage conveying pipe and the deep external heating cylinder are also utilized to realize efficient heat transfer, and the pH value and the temperature are flexibly adjusted according to reaction requirements; the driving motor drives the spiral cone paddle to stir, mixing is promoted, reaction is accelerated, internal circulation of the sludge is formed, the inner filter cylinder is driven by the servo motor to rotate, and solid-liquid separation is achieved through centrifugal force.

The invention discloses a sewage surface foam and scum treatment device and method. The sewage surface foam and scum treatment device comprises a pretreatment tank and an oxidation treatment tank, the pretreatment tank comprises a sewage area and a filter area, a water outlet is formed in the partition plate, an inclined scum discharge pipe with the upper end penetrating through the sewage area to be communicated with the outside is arranged at the water outlet, and the bottom of the scum discharge pipe is of a filter plate structure; the filtering area is communicated with the oxidation treatment tank; a foam scum discharging device is arranged at the upper end of the scum discharging pipe and comprises a driving rotary drum, a plurality of scraping plates are arranged on the outer surface of the driving rotary drum in the circumferential direction, the ends of the scraping plates are of an L-hook-shaped structure, a discharging groove is formed in the outer wall, beside the scraping plates, of the driving rotary drum, and the bottom face of the discharging groove is obliquely arranged; and the driving drum can rotate to drive the scraper to move to the outlet of the scum discharge pipe to remove foam scum. The water outlet structure of the pretreatment tank is improved, and meanwhile, the foam and scum discharging device with an improved structure is arranged, so that collection and defoaming treatment of foam and scum can be realized during scraping.

The utility model discloses a degradable plastic packaging bag which comprises a packaging bag body, the packaging bag body comprises a degradable base layer, and the outer side of the degradable base layer is fixedly connected with a printing layer. The inner side of the degradable base layer is fixedly connected with a waterproof layer, the inner side of the waterproof layer is fixedly connected with an antibacterial layer, and the inner side of the antibacterial layer is fixedly connected with a protective layer. The degradable plastic packaging bag provided by the utility model has good waterproof and antibacterial effects under the interaction of the degradable base layer, the printing layer, the waterproof layer, the antibacterial layer and the protective layer, and also has the advantage that the packaging bag can be quickly degraded by the outside after being discarded, so that a large amount of white pollution is not caused; the degradation speed of the polymer packaging bag is accelerated, and the environment-friendly effect can be achieved.

The invention discloses a high-efficiency degradation method of corn straws containing a low-temperature microbial inoculum for cold regions, which comprises the following steps: crushing corn straws, spraying degrading bacteria onto straw fragments, burying the straw fragments attached with the microbial inoculum under soil through cultivated land, and accelerating the degradation speed of the straws by utilizing the degrading bacteria, so that the degradation rate of the straws is increased; the corn straw degradation efficiency is improved (the corn straw degradation time can be shortened to be within 45 days), the growth environment temperature of bacteria is kept by covering the soil with straw powder, the activity of the bacteria can be improved, the straw degradation speed of the bacteria is further increased, and ultraviolet rays can be isolated by spraying water on the soil and covering the soil with the straw attached with the microbial inoculum, so that the corn straw degradation efficiency is improved. Sunlight is prevented from irradiating the fungicide to kill the fungicide, and the survival rate of microorganisms in the fungicide is increased.

The present invention relates to a marine biodegradation speed improver for a biodegradable resin. The present invention provides a marine biodegradation speed improver for a biodegradable resin, which contains 16-hydroxyhexadecanoic acid.

The invention discloses an environmentally friendly aluminum paint stripper and a preparation method thereof in the field of paint stripper technology, including the following components by weight: 15-20 parts of alkaline substances, 8-10 parts of catalyst promoters, 6-8 parts of cosolvents, 3-5 parts of de-agent promoters, 3.6-4.6 parts of surfactants and 200-230 parts of deionized water. The present invention proposes to prepare a water-based environmentally friendly alkaline paint stripper by selecting a high-boiling-point low-toxicity component, thereby achieving the technical effect of paint stripper environmental protection, and preparing a catalyst promoter at the same time, connecting a carbon shell with nano-iron tetroxide as the core, loading an alkaline metal oxide, and improving the degradation rate of the paint film, thereby reducing the paint stripping time and reducing the substrate loss.

The invention discloses a bonded neodymium-iron-boron magnet and a preparation method and a degradation method thereof, belongs to the technical field of magnetic materials, and overcomes the defects that a degradable bonded neodymium-iron-boron magnet in the prior art is poor in heat resistance and cannot work under a high-temperature condition. The bonded neodymium-iron-boron magnet is prepared from neodymium-iron-boron magnetic powder, aluminum oxide, a binder, a curing agent and a lubricant. The mass ratio of the neodymium iron boron magnetic powder to the aluminum oxide is (9-15): 1; the binder is a degradable polymer and accounts for 3%-3.5% of the total mass of the neodymium iron boron magnetic powder and the aluminum oxide. The heat resistance of the degradable bonded neodymium-iron-boron magnet is improved, and meanwhile the magnetic performance is guaranteed.

The invention belongs to the field of fry breeding, and particularly relates to an ecological grouper fry breeding system and method based on a wave making system. According to the scheme, the grouper ecological breeding system based on the wave making system comprises an equipment unit and a regulation and control unit, the equipment unit comprises an ecological pond, an impeller type aerator, a surge type aerator and a wave making ball, and the impeller type aerator, the surge type aerator and the wave making ball are arranged at different positions in the ecological pond respectively; and the regulation and control unit is electrically connected with the impeller type aerator, the surge type aerator and the wave making ball, is used for respectively controlling the starting and stopping of each device in the device unit at different stages of seedling raising, and is also used for regulating and controlling the working power of each device in the device unit. According to the scheme, the problems of water body aging and low survival rate in an artificially cultured grouper breeding ecological system are solved.

The invention discloses immobilized particles capable of efficiently and rapidly degrading crystal violet and a preparation method of the immobilized particles, and belongs to the technical field of biology, and the immobilized particles are mainly prepared from bacterial strains, sodium alginate, chitosan and biochar; the bacterial strain is Arthrobacter sp., and the preservation number of the bacterial strain is CICC (China General Microbiological Culture Collection Center) No. 23408. The method for obtaining the crystal violet degrading bacteria is simple, stable and good in operability, and the prepared immobilized particles can solve the problems that a traditional carrier material is poor in microbial activity, low in treatment efficiency, small in recycling frequency and the like. The obtained immobilized particles can rapidly decolorize and degrade crystal violet dye, the treatment cost is low, the efficiency is high, and compared with a chemical method, the immobilized particles are safer and free of secondary pollution.

The invention discloses an antibacterial packaging material as well as a preparation method and application thereof. The antibacterial packaging material is prepared from pineapple leaf fiber carboxymethyl cellulose, carboxymethyl cellulose, cationic starch, 3-hydroxyl octoate, alpha-tocopherol, dimethylbiguanide hydrochloride, a plasticizer, nitrogen-doped carbon quantum dots, plant essential oil, nano zeolite powder, carvacrol and citric acid. The preparation method comprises the following steps: dispersing the cationic starch in the deionized water, dispersing the pineapple leaf fiber carboxymethyl cellulose and carboxymethyl cellulose in the deionized water, completely dissolving, adding into a starch solution, sequentially adding the rest components, uniformly mixing, heating, reacting, forming a film, and drying to obtain the packaging material. According to the antibacterial packaging material, the cationic starch, the carbon quantum dots, the plant essential oil and other related components are combined for the first time to form a novel antibacterial packaging material, the antibacterial performance is remarkably improved and kept for a long time through the synergistic effect of all the components, and the antibacterial packaging material is high in material stability, simple and convenient in preparation process, low in cost and high in application and popularization value.

This invention proposes an environmentally friendly and biodegradable polyolefin heat shrinkable film and its preparation process, comprising a three-layer co-extruded outer layer, a core layer, and an inner surface layer; the outer and inner surface layers are composed of the following raw materials by weight: 65-75 parts of linear low-density polyethylene A, 15-25 parts of polypropylene carbonate, 10-15 parts of chitosan, 2-5 parts of bamboo fiber A, 2-6 parts of maleic anhydride-grafted polyethylene, 1-3 parts of graphene oxide, 0.5-1.0 parts of opening agent, and 1-2 parts of slip agent; the core layer comprises 60-70 parts of linear low-density polyethylene B, 15-20 parts of ethyl acetate, 10-15 parts of starch-grafted modified acrylic monomer, 2-6 parts of calcium phosphate ceramic, 5-10 parts of bamboo fiber B, 2-5 parts of compatibilizer, and 0.5-1 part of antioxidant. The environmentally friendly and biodegradable polyolefin heat shrink film provided by this invention can simultaneously improve the heat shrinkage rate, mechanical properties and degradation efficiency of traditional polyolefin heat shrink film, thereby achieving performance improvement of biodegradable heat shrink film and controllable degradation.

The present invention relates to the technical field of garbage packaging bags, and specifically discloses an environmentally friendly, non-toxic, biodegradable garbage bag and a preparation method thereof. The raw materials of the environmentally friendly, non-toxic, biodegradable garbage bag include, by mass: 80-90 parts of polyethylene, 100-120 parts of nano calcium carbonate, 1-5 parts of photosensitizer, 1-5 parts of chitosan, 1-5 parts of lubricant, 1-3 parts of dispersant, 1-3 parts of coupling agent, 10-30 parts of starch, 1-5 parts of acrylamide, 1-2 parts of polyvinyl alcohol, 0.01-0.1 parts of cross-linking agent, 0.001-0.01 parts of initiator, 1-5 parts of polyaspartic acid, 30-40 parts of polylactic acid, 40-60 parts of polybutylene terephthalate-adipate, 5-15 parts of polybutylene succinate, 0.1-2 parts of maleic anhydride, and 5-15 parts of toughening fiber; the raw materials of the toughening fiber include: oligosaccharides, sodium methyl methacrylate sulfonate, potassium persulfate, and microcrystalline cellulose.

The invention relates to a carbon adsorption humic acid organic fertilizer and a preparation method thereof, and belongs to the technical field of organic fertilizers. The preparation method comprises the following steps: mixing a carbon adsorption material and graphene into a fermented humic acid solution, carrying out carbon adsorption at 50-150 DEG C, carrying out solid-liquid separation, adding a stabilizer into the obtained liquid, and uniformly mixing to obtain the fertilizer. Compared with humic acid, the carbon adsorption humic acid organic fertilizer prepared by the preparation method disclosed by the invention has the following advantages in the aspect of improving the soil fertility: 1) the decomposition of the humic acid is delayed; (2) the stability of humic acid is improved; and (3) nutrients required by plants are provided.

The invention discloses an ecological environment material crushing and degrading device and a degrading treatment method, and relates to the technical field of ecological environment material equipment.The device comprises a bottom plate, a degrading barrel and a crushing barrel, the crushing barrel is fixedly connected to the upper portion of the degrading barrel, and the crushing barrel and the degrading barrel are separated through a screen; the rotating shaft penetrates through the crushing barrel and extends to the bottom of the degradation barrel, and the rotating shaft is fixed to the bottom of the degradation barrel; a crushing assembly is mounted in the crushing barrel; a stirring assembly is mounted in the degradation barrel; an oscillation assembly is arranged on the outer wall of the degradation barrel and the outer wall of the crushing barrel and comprises a mounting block, a motor, a rotating plate, an oscillation block, at least two oscillation plates, an elastic rope and a tension rod, the motor applies external force to the oscillation plates under the action of the rotating plate and the tension rod, and the elastic rope is used for transmitting oscillation force between the oscillation plates; and the oscillating force acts on an oscillating block mounted on the outer wall of the crushing barrel to generate an oscillating effect on the crushing barrel. By adopting the device, the degradation efficiency of ecological environment materials can be improved.

The invention belongs to the technical field of degradation of high polymer materials, and relates to a method for degrading polyethylene glycol terephthalate microplastics. The method comprises the following steps: S1, pretreating polyethylene glycol terephthalate to obtain PET micro-plastic powder; and S2, adding the PET micro-plastic powder obtained in the step S1 into an electrolyte containing a surfactant, adjusting the pH value of the electrolyte to 4-7, stirring and electrolyzing at the temperature of 80-90 DEG C, and degrading the PET micro-plastic. Compared with the prior art, the method has the advantages that the polyethylene glycol terephthalate micro-plastic is quickly degraded within a short time under the condition that a catalyst is not added through the electrochemical oxidation effect, the reaction conditions are easy to operate, the cost is low, and the degradation rate is high.

The utility model discloses an integral cement septic tank with an anti-blocking function. The integral cement septic tank comprises a cement shell and a mounting shell, uniformly-distributed inlets are formed in the top end of the outer surface of the cement shell, filter screens are fixedly connected to the inner walls of the inlets, and an outlet is formed in the upper end of the left side face of the cement shell; the mounting shell is fixedly connected into a mounting opening in the front end of the outer surface of the cement shell, a stirring mechanism is arranged on the front side face of the mounting shell, the rear end of the stirring mechanism extends into the cement shell, the stirring mechanism comprises a guide sliding groove, a rack plate, a sliding block, a supporting rod and a stirring rod, and the guide sliding groove is formed in the inner wall of the front side of the cement shell; according to the cement integral septic tank with the anti-blocking function, liquid dung in the cement shell is stirred in a left-right reciprocating mode, decomposition and flowing are promoted, the sewage degradation speed is increased, and the risks of accumulation and blocking are reduced.

The invention provides an acellular matrix fiber woven scaffold as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The acellular matrix fiber woven scaffold comprises a woven structure unit, wherein the woven structure unit comprises warp yarns and a plurality of acellular matrix fiber weft yarns; the acellular matrix fiber is prepared by cutting an acellular matrix paper-based material at equal intervals; the plurality of acellular matrix fiber wefts are arranged in parallel according to a bionic trend and are interwoven and fixed through the warps, so that a bionic pattern simulating natural tissue fiber arrangement is formed in the weaving structure unit. The acellular matrix fiber scaffold is prepared by innovatively applying a weaving technology, the scaffold can improve the cell loading efficiency, is beneficial to self-repair and reconstruction of damaged tissues, provides suitable survival and growth conditions for cells, and has good application prospects in the field of biomedical engineering, especially in the aspects of tissue repair and regenerative medicine. And huge application potential is shown.

The present application relates to the technical field of agricultural product quality improvement, and specifically provides a method for improving the content of tocopherol in sesame by using diquat. It is found for the first time that diquat can improve the content of tocopherol in sesame. The method provided by the present application comprises: spraying a diquat solution 5-15 days before the harvesting of sesame; the diquat solution is a 20% diquat water agent with a volume percentage concentration of 0.167%-0.5%, and the spraying amount of the diquat solution is 10-30 L per mu. The present application provides a reference for improving the content of tocopherol in sesame in production and technical support for the creation of high-quality edible vegetable oil.

The invention discloses pediococcus acidilactici and application of the pediococcus acidilactici in feed and food, the pediococcus acidilactici HJ516 has the preservation number of CGMCC (China General Microbiological Culture Collection Center) No.31438, and the preservation date is July 24, 2024. The strain has the remarkable capability of resisting oxidation and regulating the immune system, so that the resistance of the organism is improved. The invention further discloses application of the pediococcus acidilactici HJ516 serving as an important functional component to preparation of feed for efficiently preventing and / or relieving and / or treating aquatic product death caused by the extreme environment. The invention also provides pediococcus acidilactici HJ516 as a functional probiotic, and the pediococcus acidilactici HJ516 has a remarkable effect of inhibiting amylase activity in preparation of wheat-based flour food. The application range of the pediococcus acidilactici is expanded, and the utilization value of the pediococcus acidilactici in the aspects of feed, food and the like is improved.

The invention discloses a biodegradation device for environmentally friendly treatment of ginkgo leaf extraction residue in the technical field of ginkgo leaf residue treatment, comprising a degradation pool, wherein the upper end surface of the degradation pool is provided with a sealing cover, and the surface is provided with an addition tube; in the process of degrading the ginkgo leaf residue, the invention utilizes a first stirring shaft, a second stirring shaft and a stirring blade to mix the ginkgo leaf residue in the degradation pool with an added microbial solution, thereby increasing the contact area between the ginkgo leaf residue and the microbial solution, accelerating the degradation speed of the ginkgo leaf residue by the microorganisms, and improving the degradation efficiency; and utilizing a sealing plate pulling rod and other structures, after the degradation of the ginkgo leaf residue is completed, the stirring blade can be transformed into a conveying blade, which is convenient for discharging the degraded waste in the degradation pool, and the stirring blade can be used as a conveying blade, thereby avoiding that the stirring blade will block the discharge of the degraded waste when the degraded waste is discharged, thereby increasing the labor of workers and reducing the discharge efficiency.

This invention discloses a Bi₂O₃ / V₂C material, its preparation method, and its applications. The Bi₂O₃ / V₂C material is synthesized from Bi salt and V₂C through a hydrothermal reaction and calcination. The elemental molar ratio between Bi salt and V₂C is Bi:V = 14~300:1. By weight, the ratio between Bi salt and V₂C is m(V₂C):m(Bi salt) = 0.1%~2%:1. This invention uses the oxide corresponding to the Bi salt as the main catalyst and introduces V₂C as a co-catalyst. The resulting material exhibits improved catalytic performance, requires a lower V₂C dosage, and can catalytically degrade malachite green at a degradation rate of over 90%.

The application discloses a system and method for solar oxidation degradation of organic wastewater and hydrogen production, and the whole system comprises a membrane separation subsystem, a solar heat collection subsystem and a multi-electrode reverse electrodialysis subsystem. The system takes solar energy as a driving force, takes high-salt organic wastewater as a working solution, realizes hydrogen production and organic matter degradation by means of a concentration difference of the working solution, separates the high-salt organic wastewater into high-salt wastewater and organic wastewater, and realizes effective utilization and efficient degradation of the high-salt organic wastewater by combining solar energy and reverse electrodialysis. That is, the system can completely mineralize the organic matter in the wastewater and produce high-purity hydrogen, and realizes efficient and high-quality utilization of solar energy.

The invention discloses a preparation method and application of an organic waste fermentation inoculant, and belongs to the technical field of microorganisms. The organic waste fermentation inoculant is prepared from the following raw materials in parts by weight: 1 to 3 parts of bacillus subtilis, 2 to 4 parts of bacillus amyloliquefaciens, 2 to 3 parts of pseudomonas fluorescens, 4 to 6 parts of streptococcus thermophilus, 5 to 8 parts of lactobacillus delbrueckii subsp. Bulgaricus, 4 to 6 parts of nocardia albicans, 30 to 40 parts of porous activated carbon, 2 to 3 parts of beet extract, 4 to 6 parts of mannitol and 10 to 15 parts of straw waste powder. The organic waste fermentation inoculant can accelerate the degradation speed of organic matters in the composting process and shorten the fermentation time of the organic wastes, and has remarkable advantages in practical application.

The invention discloses a biological agent for rapidly decomposing straws in a cold area as well as a preparation method and application of the biological agent, and belongs to the technical field of microbial preparations. The invention relates to a biological agent for rapidly decomposing straws in a cold area. The biological agent is prepared from brevibacterium tumefaciens CGMCC (China General Microbiological Culture Collection Center) 1.10488, pichia pastoris CICC 32806, trichoderma longibrachiatum CICC 13054, aspergillus niger CICC 2151 and a carrier. The biological agent disclosed by the invention has the advantages of high cold resistance, high activity, high degradation speed and the like, has relatively high metabolic capability at low temperature, is suitable for straw decomposition treatment in cold and cool areas, and provides a new technical thought for crop product management in low-temperature areas.

The invention relates to the technical field of plastic films, and particularly discloses a degradable plastic film and a preparation method thereof. The degradable plastic film is prepared from the following components in parts by mass: 100 parts of polypropylene resin; 3.5 to 4.5 parts of color master batch; 1.8 to 2.2 parts of an anti-blocking agent; 0.08 to 0.12 part of a gloss conditioning agent; 40 to 50 parts of a degradable filler; 0.5 to 0.8 part of a degradation agent; the degradable filler is obtained by modifying polylactic acid fibers with a modifying solution; the modified liquid is formed by compounding dimethylaminopropyl methacrylamide, 2-ethylhexyl acrylate, dimethyl sulfoxide, allyl glycidyl ether and ethanol. The preparation method has the advantage that the prepared plastic film is high in strength and good in degradability.

The invention discloses a modified polymer, low-amine-value activated polyurethane, a resin intermediate, a low-amine-value resin intermediate and a preparation method of the low-amine-value resin intermediate, and provides the modified polymer serving as the activated polyurethane, the activated polyurethane is prepared by crushing polyurethane solid waste, the particle size of the activated polyurethane is not less than 40 meshes, and the particle size of the activated polyurethane is not less than 10 meshes. The form of the activated polyurethane product comprises but is not limited to one or more of paste, particle, block, strip, sheet, ball, powder or flocculent. The crushing treatment comprises but is not limited to one or combination of more of crushing, shearing, milling, ball milling, grinding, airflow crushing, ultrasonic crushing and the like; the initial polymer is polyurethane waste; wherein equipment for crushing treatment comprises one or a combination of two of an internal mixer and a screw extruder. The method has the advantages that the environmental pollution is reduced, and the safety of a production place is improved.