6100 results about "Biodegradation" patented technology

The present invention discloses a water-based emulsion of PHA, PBAT and PVOH and its application in paper-based barrier coatings. This emulsion is prepared by first melt-blending PHA and PBAT at 150-170 °C and then dispersing them into an aqueous PVOH solution at 80-95 °C. Plasticizers, cross-linking agents and surfactants can be added to improve the performance. After coating on paper and drying at 80-150 °C, a barrier film with a Cobb value of 10-15 g / m² and a Kit ≥ 10 grade is formed. Compared with traditional PE film laminating or fluorine-containing coatings, this system is more environmentally friendly and recyclable; PVOH dissolves in pulping water, PHA and PBAT are easily separated, and fibers can be efficiently recovered; in composting, soil and marine environments, PHA and PBAT have extensive biodegradability and are superior to PLA which is difficult to recycle and requires industrial composting. It is applicable to food, industrial, special packaging and agricultural paper products.

The invention discloses a bio-based foam adsorption material as well as a preparation method and adsorption application thereof. The bio-based polymer is used as a foam skeleton, the adsorbent with a large specific surface area is added to further improve the foam adsorption capacity, the cross-linking agent and the reinforcing filler improve the overall strength of the foam, and the bio-based foam adsorption material with the high adsorption capacity is obtained. The bio-based foam disclosed by the invention is light in weight, controllable in hydrophilicity and hydrophobicity, and capable of separating and removing pollutants such as oil and organic dye. The foam has high adsorption capacity and good cyclic adsorption capacity, can be repeatedly used, is biodegradable, does not pollute the environment, can effectively adsorb dangerous chemicals existing in a water body, does not cause secondary pollution, and can be used for decontamination treatment of organic pollutants in industrial wastewater.

The invention discloses a PHA / PVA nano-scale paper-based barrier emulsion as well as a preparation method and application thereof. The water-based emulsion comprises PHA particles with the average particle size ranging from 100 nanometers to 300 nanometers and PVA, the PHA and the PVA are blended according to a specific proportion, and the PVA serves as a main film forming component and a barrier property contribution component and is blended with the PHA to form the nano-emulsion. The preparation method comprises the following steps: mixing PHA particles with an initial average particle size of 1-100 microns with a PVA aqueous solution, and carrying out high-pressure homogenization and other nanocrystallization means to obtain the nano-emulsion. The emulsion can be coated on the surfaces of paper-based materials such as paper and paperboards, and a barrier coating is formed after the emulsion is dried. The obtained emulsion is small in particle size, good in stability and good in leveling property, a uniform and compact barrier film is easily formed on a paper base, the film has excellent water vapor, oxygen and grease barrier performance, and the material is bio-based, biodegradable and environmentally friendly.

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 method for preparing a modified PHA composite material by using a twin-screw extruder and application of the modified PHA composite material. The method comprises the following steps: carrying out in-situ melt blending on polyhydroxyalkanoate (PHA), poly (butylene adipate terephthalate)-poly (butylene adipate terephthalate) (PBAT), polyvinyl alcohol (PVOH) and chain extenders in a twin-screw extruder, so that the chain extenders such as polyfunctional group epoxy or isocyanate react with molecular terminal groups of the PHA, the PBAT and the PVOH to form a partially crosslinked or grafted structure; therefore, the compatibility is enhanced, the thermal stability is improved, and the barrier property is remarkably improved. Experiments prove that the obtained modified PHA composite material has the characteristics of high strength, high elongation, excellent water and oxygen resistance and biodegradability, and meets the strict requirements of multiple fields such as food packaging, agricultural plastic mulching films, medical consumables and the like on mechanical properties and barrier properties. The preparation method is simple, convenient and efficient, and large-scale continuous production can be achieved on existing double-screw extrusion equipment.

The invention relates to the technical field of degradable plastics, and provides biodegradable plastic particles as well as a preparation method and application thereof. The biodegradable plastic particles comprise the following components in parts by weight: 50-80 parts of PLA, 20-50 parts of PBAT, 5-20 parts of a filler, 1-8 parts of a flexibilizer, 1-5 parts of a lubricant and 5-10 parts of a modifier. The modifier comprises a polylactic acid-polyethylene glycol block copolymer and a polycaprolactone-polyglycidyl methacrylate block copolymer in a mass ratio of (1: 19)-(19: 1). According to the technical scheme, the problems of poor flexibility and strength of plastic particles in related technologies are solved.

The invention relates to the technical field of plastic packaging preparation, in particular to an anti-aging plastic packaging material and a preparation method thereof.The anti-aging plastic packaging material is prepared from, by mass, 100-140 parts of polylactic acid, 60-80 parts of PBAT, 2-5 parts of a composite anti-aging agent, 1-2 parts of a lubricant, 2-4 parts of a flame retardant and 3-6 parts of a compatilizer; the composite anti-aging agent comprises a modified anti-aging agent obtained by compounding functionalized montmorillonite and modified silicon dioxide, the functionalized montmorillonite is carnosic acid grafted rare earth ion modified montmorillonite, and the modified silicon dioxide is epoxy methyl oleate grafted silicon dioxide. According to the anti-aging plastic packaging material provided by the invention, a plastic material system with multiple protection mechanisms is constructed through the synergistic effect of all the components, and the prepared plastic packaging material not only keeps good biodegradability, but also has excellent ultraviolet light resistance and oxidation resistance.

The present invention discloses a PHA / PVA nanoscale paper-based barrier emulsion, and its preparation method and application. The aqueous emulsion comprises PHA particles with an average particle size of 100 nanometers to 300 nanometers and PVA, wherein PHA and PVA are blended in a specific ratio, and PVA is blended with PHA as the main film-forming component and barrier performance contributing component to form the nanoemulsion. The preparation method comprises mixing PHA particles with an initial average particle size of 1 micron to 100 microns with a PVA aqueous solution, and processing the nanoemulsion by nano-processing means such as high-pressure homogenization. The emulsion can be applied to paper-based materials, such as paper and cardboard surfaces, and forms a barrier coating after drying. The emulsion obtained by the present invention has small particle size, good stability, good leveling properties, and is easy to form a uniform and dense barrier film on the paper base. The film has excellent water vapor, oxygen and grease barrier properties, and the material is bio-based, biodegradable, and environmentally friendly.

The invention discloses a bamboo powder-containing biodegradable plastic for food contact and a preparation method thereof, and relates to the technical field of bio-based materials. The bamboo powder-containing biodegradable plastic for food contact comprises chitosan starch and modified bamboo powder, the chitosan starch is prepared by adding composite chitosan and amino-terminated polyethylene glycol into oxidized corn starch, and the composite chitosan is prepared by grafting chlorogenic acid on the surface of chitosan and then coating succinic anhydride derivatives. The succinic anhydride derivative is prepared from dodecenyl succinic anhydride and 1, 4-butanediamine through a reaction, so that the plastic has the antibacterial property, and meanwhile, the mechanical property is enhanced; the modified bamboo powder is prepared by reacting bamboo powder with a carboxyl-terminated composition, and the carboxyl-terminated composition comprises carboxyl-terminated polylactic acid and carboxyl-terminated polyamide. The toughness of the plastic is enhanced, and the mechanical property of the plastic is further enhanced.

The invention relates to the technical field of biodegradable materials, and discloses a full-biodegradable bamboo fiber film material and a preparation method thereof, the full-biodegradable bamboo fiber film material comprises the following raw materials by weight: 30-50 parts of modified bamboo fiber, 20-40 parts of a biodegradable polymer, 3-8 parts of a plasticizer, and 1-5 parts of a cross-linking agent. Acrylic acid grafted hydroxyethyl methylacrylate is grafted to epoxy resin containing azobenzene side chains to form a grafting product of a latticed structure, and the grafting product and hydroxyl groups on bamboo fibers form ether bonds to modify the bamboo fibers. The latticed structure can effectively improve the mechanical property of the film, and azobenzene is grafted to the side chain of bisphenol A epoxy resin, so that the epoxy resin has better degradability.

The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment device for cosmetic processing and a treatment method thereof.The wastewater treatment device comprises a treatment tank, a stirring assembly is arranged in the treatment tank, an aeration assembly is arranged at the top of the treatment tank, and a deodorization assembly is arranged at the top of the treatment tank; the aeration assembly comprises an aeration pipe, an air compression assembly and a driving assembly, and the driving assembly drives the air compression assembly to compress air into the aeration pipe and drives the aeration pipe to do reciprocating motion of axial lifting and radial horizontal movement at the same time; the deodorization assembly comprises a deodorization cylinder and an activated carbon filter element, and further comprises an air exhaust piece and an air outlet piece which are arranged in the deodorization cylinder. Through the arrangement of the treatment tank and the stirring assembly, after wastewater and activated sludge can be added into the treatment tank and stirred and premixed under the action of the stirring assembly, the premixed wastewater is introduced into the aerobic tank for biodegradation treatment, so that the subsequent wastewater treatment effect is better.

The present invention is directed to a biodegradable container in combination with a liquid personal care composition comprising: a biodegradable vessel having at least one opening and a biodegradable cover for the opening wherein the container, a liquid personal care composition comprising from about 14% to about 50% water; from about 20% to about 70% of a humectant; wherein there is a Water Activity (Aw) of about 0.40 to about 0.90.

Described herein are biodegradable, encircling protective devices used to protect seeds and saplings during their greatest vulnerability after germination while promoting growth of the sapling, preventing detritus and competing plants from fouling growth, and simultaneously fending off predation from herbivores or omnivores, which devices melt when exposed to controlled fire without harmful side effects.

The invention discloses a titanium alloy feeding implant and a preparation method thereof, and the preparation method comprises the following steps: carrying out activating treatment on a biodegradable bonding system in an inert gas environment to form an expansion-state binder precursor, and then mixing titanium alloy powder and the precursor which are proportioned in stages in a multi-stage mixing device in stages to obtain the titanium alloy feeding implant. Sequentially executing low-temperature activation, melting and dispersing operations to prepare uniform feed; carrying out vibration-assisted injection molding on the feed to generate a green body with a multi-stage pore structure; removing the binder step by step and reserving pores by adopting a synergistic degreasing process of supercritical fluid extraction, microwave decomposition and gas phase cleaning; densification sintering molding of the titanium alloy implant is realized through pre-sintering and plasma activating treatment, so that an implant finished product is formed; according to the process, through the coupling design of innovation of a biodegradable binder system and an intelligent degreasing process, on the premise that the biological safety of the titanium alloy implant is ensured, precise forming and sintering densification control of a complex pore structure are synchronously achieved.

The invention discloses a hydrogel wound dressing for promoting healing of infectious wounds. The hydrogel wound dressing is prepared from the following raw materials: oxidized methacrylic acid hyaluronic acid, waterborne polyurethane, polylysine, cannabidiol, neomycin sulfate and 2-roots alcohol. The invention also provides a preparation method of the hydrogel wound dressing and application of the hydrogel wound dressing in preparation of products for repairing infectious wounds. The wound dressing provided by the invention has a microporous structure, good biocompatibility and biodegradability, and can be used for stopping bleeding, reducing wound infection and promoting cell proliferation and wound healing.

The invention discloses a PHA nano aqueous suspension as well as a preparation method and application thereof, and belongs to the field of high polymer materials and processing and application thereof. The suspension takes PHA resin as a dispersion phase and water as a continuous phase, the total solid content is 23-65wt%, the PHA resin accounts for 80-98.5 wt% of the total solid, and the assistant accounts for 1.5-20wt% of the total solid. The average particle size of PHA particles is 30-140 nm, D90 is smaller than or equal to 150 nm, the polydispersity index PDI is smaller than 0.3, and when the pH is 6.5-7.5, the absolute value of Zeta potential is larger than 30 mV. The preparation method comprises the following steps: pretreating the PHA raw material, preliminarily dispersing in a water phase under the action of the dispersion stabilizing aid, and carrying out high-energy homogenization treatment. The obtained suspension is stable in storage, has excellent barrier property and mechanical property after film formation, and is suitable for preparing biodegradable food packaging barrier coatings, water-based environment-friendly coatings and water-based adhesives.

The full-biodegradable film mulching and punching equipment for crop planting comprises a sleeve, the sleeve is in threaded connection with the outer side of a connecting roller, and the upper portion of a punch is connected with an adjusting mechanism capable of adjusting the size of a discharging opening according to different crop vegetable seeds. The lower portion of the punch is connected with a frame plate through a first transverse rod and a limiting rod, and flow guiding mechanisms used for guiding crop vegetable seeds to the inner side of the frame plate are installed on the two sides of the frame plate. According to the equipment, the processes of film mulching, punching and sowing are automatically completed, the speed is high, the efficiency is high, the planting time is greatly shortened, and the agricultural production efficiency is improved. Automatic equipment replaces manual operation, manpower input is reduced, labor cost is reduced, meanwhile, labor intensity is relieved, the equipment can control the seeding quantity, the seeding uniformity and depth are guaranteed, the seed germination rate and the crop yield are improved, in addition, the equipment does not need any electric control unit, and cost is greatly saved.

The invention relates to a biodegradable composition as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The biodegradable composition disclosed by the invention is prepared from the following components in parts by weight: 44 to 90 parts of PBAT resin, 5 to 15 parts of amorphous resin and 5 to 40 parts of inorganic filler, based on the total molar weight of a terephthalic acid monomer unit and an adipic acid monomer unit in the PBAT resin, the molar ratio of the terephthalic acid monomer unit is 47-49%; the amorphous resin is at least one of PPC-P, PMMA (Polymethyl Methacrylate), PETG (Polyethylene Terephthalate Glycol) and PCTG; the inorganic filler comprises at least one of calcium carbonate and talcum powder; the particle size D50 of the calcium carbonate is less than 5 [mu] m, and / or the particle size D50 of the talcum powder is less than 8 [mu] m. The biodegradable film produced by adopting the biodegradable composition under a low blow-up ratio process has excellent dart falling performance, and can meet the requirement of ultra-long shelf life.

The invention discloses a high-barrier degradable composite film and a preparation method thereof, and belongs to the field of film manufacturing. 15 to 30 parts of PBAT; 15 to 30 parts of PPC; 1 to 10 parts of montmorillonite; 0.2 to 1 part of an epoxy chain extender; 0.2 to 0.5 part of an aliphatic alcohol chain extender; and 1.5-15 parts of a low molecular weight aliphatic polyamide substance. According to the invention, biodegradable materials PLA, PBAT and PPC with excellent performance are selected as base materials, and a certain amount of auxiliary agents are added to modify and prepare the high-barrier degradable composite film. The prepared composite film has the advantages of high strength, high toughness, high barrier property, low cost, high biodegradability and the like. Besides the field of mulching films, the film can also be widely applied to high-end packaging fields with high barrier property requirements, such as packaging of high-tech fine instruments, food and medicine industries and the like, and the preparation method is simple, economical and environment-friendly.

The invention relates to a marine-source microbacterium laminae CJB-Jou02 strain capable of efficiently biodegrading PE (polyethylene) microplastics, and the degradation capability of the marine-source microbacterium laminae CJB-Jou02 strain is evaluated. According to the microbacterium capable of degrading the PE micro-plastic leaves, the microbacterium is screened out from a marine mud sample, the preservation number of the strain is CGMCC 29643, the strain treats high-density PE micro-plastic for 30 days, the weight loss rate reaches up to 16.6 + / -0.46%, and the microbacterium can be used for degrading the PE micro-plastic leaves. Based on test results of a scanning electron microscope, a Fourier transform infrared spectrum, a water contact angle instrument and an X-ray diffractometer, the strain is proved to have the capability of efficiently biodegrading the PE micro-plastic, the compact crystal structure of the PE micro-plastic is damaged, the particle diameter is obviously reduced, and the hydrophilicity is increased. Meanwhile, the invention also finds that the microbacterium leaf strain CJB-Jou02 has certain degradation capacity on PE (polyethylene) membranes and microplastic bacteria such as PA (polyamide), PP (polypropylene), PS (polystyrene), PET (polyethylene terephthalate) and the like, and a new solution is provided for solving the problem of environmental pollution of PE microplastics.

The embodiment of the invention relates to electrochemical enhanced biological integrated intelligent regulation and control equipment for treating organic wastewater. The electrochemical enhanced biological integrated intelligent regulation and control equipment comprises an electrochemical enhanced biodegradation module and an intelligent control system, the electrochemical enhanced biodegradation module comprises a porous membrane electrode assembly, a power supply control system, an electrolyte adding system, a fixed bed biological membrane, an aeration system and a carbon source adding system; the intelligent control system comprises a data acquisition and remote monitoring module and a PLC (Programmable Logic Controller); the data acquisition and remote monitoring module acquires parameters such as COD (Chemical Oxygen Demand), dissolved oxygen concentration, ammonia nitrogen, total nitrogen and conductivity of the electrochemical enhanced biodegradation module and transmits the parameters to the PLC; and the PLC receives the parameters, and automatically adjusts one or more of voltage, current density, aeration rate and carbon source dosage based on a preset model established by a support vector regression and neural network machine learning algorithm. The intelligent regulation and control equipment can keep an optimal treatment state under different wastewater characteristics and load conditions, and has strong adaptability to environment or load fluctuation.

The invention belongs to the technical field of agricultural microorganisms, and particularly relates to a coxakella cocori strain as well as a microbial agent and an application of the coxakella cocori strain. The invention discloses a strain of coxakella coraldii T6-2, which is preserved in the China General Microbiological Culture Collection Center on July 10, 2024, and the preservation number is CGMCC (China General Microbiological Culture Collection Center) No.31262. The invention further discloses a preparation method of the coxakella coraldii T6-2. The strain has the characteristics of salt resistance, alkali resistance and high ammonium resistance; the strain has biological activities of dissolving phosphorus, fixing nitrogen and secreting IAA, and has an obvious promotion effect on soybean growth under salt stress; the strain has extremely strong ammonia nitrogen degradation activity, the initial concentration of ammonia nitrogen is in a range of 50-100 mg / L, and after treatment is performed for 36 h, the ammonia nitrogen degradation rate reaches 90% or above. The strain has extremely high application value in plant growth promotion and ammonia nitrogen waste biodegradation in saline-alkali and high-ammonium environments.

The invention discloses a biodegradable plastic and a preparation method thereof, belongs to the field of bioplastic preparation, and aims to solve the problem that the existing plastic is slow in degradation rate in a marine environment. The biodegradable plastic is prepared from the following components in percentage by weight: 50-80% of a biomass-based high polymer material; 10 to 35% of a degradable toughening agent; 1-5% of a photosensitizer; 2-10% of a microbial inducer; 1-5% of a processing aid; after the biomass degradable plastic is subjected to ultraviolet radiation for 7-15 days in a marine environment, initial cracks with the density being larger than or equal to 20 pieces / cm < 2 > appear on the surface, the initial cracks are broken into degradation units with the particle size being 5-20 mm after being subjected to mechanical impact of sea waves for 30-60 days, and the biological decomposition rate of the degradation units is larger than or equal to 90% within 6-12 months under the action of marine microorganisms; and no micro-plastic particles with the particle size of less than or equal to 1mm exist in the residual product. Through the synergistic effect of the photosensitizer and the microbial inducer, the degradation period in the marine environment is shortened, the degradation efficiency is improved, and the method is remarkably superior to the prior art.

The invention relates to the field of sponge materials, and provides an antibacterial degradable sponge material and a preparation method thereof. The material is prepared from protocatechuic acid modified quaternized chitosan, quaternary ammonium salt grafted gelatin, sodium alginate, polyhydroxybutyrate, polycaprolactone, a polylactic acid-glycolic acid copolymer, hexamethylene diisocyanate, a foaming agent, nano cellulose, vitamin E, polyethylene glycol, triethylamine and dimethylformamide. Protocatechuic acid and quaternized chitosan are subjected to amidation modification, and chitosan and gelatin are subjected to quaternization treatment by adopting 2, 3-epoxypropyl trimethyl ammonium chloride, so that the antibacterial property and biodegradability of the material are improved. In the material preparation process, through vacuum degassing, foaming vacuum degree and humidity control and a multi-step drying process, it is ensured that the average pore size of the material is uniform (50-200 microns) and the porosity is high (50%-90%), and the obtained material has excellent antibacterial property and degradability and has wide application value.

The invention discloses a biological environment-friendly clothing material with a self-cleaning function and a preparation method of the biological environment-friendly clothing material. According to the invention, the environmental friendliness is obviously improved, and natural components which can be completely biodegraded are adopted and can be quickly decomposed in the natural environment, so that the micro-plastic pollution is reduced; the self-cleaning function is enhanced, and through the synergistic effect of the bionic hydrophobic surface and photocatalytic decomposition, automatic falling and decomposition of stains are achieved; the durability is enhanced, a dynamic self-repairing network can automatically repair daily wear, the service life is prolonged, and the bio-based raw materials are natural, skin-friendly and excellent in air permeability. The supercritical fluid processing and microwave shaping technology replaces a high-energy-consumption process; emission of toxic substances is eliminated, and organic solvents and fluorine-containing compounds are forbidden in the whole process; raw material loss is reduced, and the using amount of functional materials is reduced through an accurate structure regulation and control technology; the maintenance cost is simplified, and the washing frequency and the use of chemical cleaning agents are reduced due to the self-cleaning characteristic; waste is compressed, and resource utilization of by-products is achieved through a closed-loop production system.

The utility model belongs to the technical field of biodegradation treatment devices, and particularly relates to a closestool with an opening and closing baffle, which is provided with a closestool outer shell and a closestool seat ring, a closestool stirring cabin is arranged in the closestool outer shell, the closestool seat ring is hinged above the closestool stirring cabin, and the closestool is characterized in that at least one stirring shaft is arranged in the closestool stirring cabin; an opening and closing baffle mechanism used for blocking the closestool stirring cabin is arranged at an opening of the closestool stirring cabin, when a user sits on the closestool seat ring, the opening and closing baffle mechanism is opened, and when the user stands up, the opening and closing baffle mechanism is closed; the device has the beneficial effects that the device can still be used under the condition of power failure, the impression experience of use can be improved, the degradation efficiency is improved and the like.

The invention relates to the technical field of biodegradable materials, and particularly discloses a BBM-added bamboo powder biodegradable material and application thereof in beer bottles. The BBM-added bamboo powder biodegradable material is prepared from the following raw materials in parts by mass: 10 to 20 parts of poly (butylene succinate), 10 to 30 parts of poly (butylene adipate-co-terephthalate), 10 to 20 parts of bamboo powder, 1 to 3 parts of dopamine hydrochloride, 0.1 to 0.5 part of n-butylamine, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 5 parts of tetraethyl orthosilicate and 1 to 2 parts of tetrabutyl titanate. 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant and 1-2 parts of a plasticizer. The BBM obtained by the invention has excellent mechanical properties, improves the anti-ultraviolet intensity of a degradable material to a certain extent, and has very good biodegradability.

The invention discloses a macromolecular antibacterial agent, an antibacterial nylon material as well as a preparation method and application thereof, and relates to the technical field of antibacterial macromolecular materials. According to the invention, lysine is used as a raw material, the polymer antibacterial agent is prepared through reactions such as dehydration ring formation and re-ring opening polymerization, the polymer antibacterial agent has the characteristics of high safety, biodegradability and good biocompatibility, and has the same polyamide main chain structure as nylon, the polymer antibacterial agent and nylon have good compatibility, and the polymer antibacterial agent and nylon 6 are fused and blended to form a nylon 6 sample. Through amide exchange reaction and hydrogen bond interaction between the macromolecular antibacterial agent and nylon 6 molecular chains, the antibacterial nylon material with excellent mechanical property and lasting and stable antibacterial effect is prepared, and the requirements of people for safety and environmental friendliness are met. The prepared antibacterial nylon material can be applied to antibacterial products such as textiles, daily necessities and packaging materials. Meanwhile, the macromolecular antibacterial agent and the antibacterial nylon material are simple in preparation process, low in raw material cost and suitable for industrial production.

The invention discloses biomass-based water-plastic plastic as well as a water-plastic forming method, preparation and application thereof, the water-plastic plastic is plastic which can be formed and processed only by utilizing water, and the water-plastic forming method mainly comprises the following steps of water treatment, shape editing and shape fixing of the biomass-based water-plastic plastic. According to the scheme, the plastic can be repeatedly edited into various one-dimensional, two-dimensional or three-dimensional shapes, expensive and complex instruments and equipment are not needed, the high-energy-consumption process such as high temperature and high pressure is avoided, the application scene of the plastic is expanded, and the service life of the plastic is prolonged; the method is a plastic molding processing method which is simple to operate, low in energy consumption, low in cost, green, environment-friendly and carbon-reducing. The biomass-based water-plastic plastic is prepared from biomass which is rich in reserves, low in cost, sustainable, renewable, biodegradable and good in biocompatibility, generally has good mechanical properties and transparency, and can be widely applied to various fields.

The invention relates to the technical field of packaging, and discloses an express waterproof bag and a preparation method thereof, the express waterproof bag comprises the following components by mass: 60-70 parts of polylactic acid, 20-30 parts of poly (adipic acid-butylene terephthalate), 5-10 parts of polyhydroxyalkanoate, 2-5 parts of nano cellulose, 1-3 parts of modified montmorillonite, 0.5-1.5 parts of a photosensitizer, 0.25-0.5 part of a bio-enzyme catalyst, and 0.5-1 part of a plasticizer. By combining polylactic acid, poly (butylene adipate-co-terephthalate) and polyhydroxyalkanoate (PHA), the biodegradability is remarkably improved while the mechanical strength of the waterproof bag is maintained, PLA is degraded into carbon dioxide and water through hydrolysis reaction, the degradation rate of PLA is adjusted through PBAT and PHA, premature degradation is avoided, rapid degradation after use is ensured, and the waterproof bag has the advantages of being environmentally friendly and free of pollution. Furthermore, the degradation rate is optimized, the stability and environmental friendliness of the material are balanced, and plastic pollution is avoided.