19results about How to "Guaranteed degradability" patented technology

The invention belongs to the technical field of biodegradable materials, and particularly relates to an environment-friendly degradable modified composite material, a preparation method and application. The material comprises PBAT, PBS, PLA, an inorganic mineral filler, natural plant fibers, PBAT-PTMO, nano-silica, an auxiliary agent and a plasticizer. In the preparation process, PLA is prevented from being hydrolyzed in vacuum drying, calcium carbonate and nano silicon dioxide are preheated and activated, natural plant fibers are dispersed through steam explosion and ethanol treatment, and raw material pretreatment comprises high-speed mixing and agglomeration breaking and medium-speed secondary premixing so as to realize uniform distribution. The co-rotating twin-screw extruder accurately controls the temperature, the speed, the rotating speed and the length-diameter ratio, and ensures melting plasticizing, uniform mixing and stable extrusion molding. According to the invention, by adopting accurate proportioning of multiple raw materials and a modification treatment process, the properties of mechanics, degradation, processing and the like of the material are synergistically improved, and the material is widely applied to multiple fields such as packaging bags, disposable tableware and agricultural plastic mulching films.

The embodiment of the invention relates to the technical field of composite materials, and particularly discloses a composite material based on degradable plastic PBAT and a preparation method thereof, the composite material comprises the following raw materials: polyamide lamellar crystal and PBAT; wherein the polyamide lamellar crystal is prepared by taking polyamide, a poor solvent and an additive as raw materials. According to the embodiment of the invention, effective combination of polyamide lamellar crystals and PBAT is realized through process design, so that the comprehensive performance of the composite material is improved while the degradability is maintained, and the problem of low mechanical strength of PBAT in application in the prior art is solved. Moreover, the preparation method provided by the embodiment of the invention is simple and has a wide market prospect.

The invention relates to the technical field of composite materials, in particular to a breathable TPU non-woven fabric composite material and a preparation method and application thereof.The breathable TPU non-woven fabric composite material comprises a surface layer and a TPU hot melt adhesive net film layer arranged on the surface layer, and the TPU hot melt adhesive net film layer is formed by conducting velvet spraying on composite TPU hot melt adhesive particles through a velvet spraying technology; the composite TPU hot melt adhesive particles comprise the following raw materials in parts by weight: 70-100 parts of TPU hot melt adhesive particles, 3-7 parts of an antibacterial agent, 0-10 parts of color master batches, 1-5 parts of an anti-ultraviolet additive and 4-10 parts of a foaming agent. The breathable TPU non-woven fabric composite material has good breathability and antibacterial performance, meanwhile, the skin-friendly performance of the composite material is effectively improved, the mechanical performance, breathability and degradable effect of the composite material are guaranteed, and the environmental protection performance is improved.

The invention relates to a method for removing halogenated pollutants in water through alternating current pulse electrochemistry. The method comprises the following steps: applying a periodic alternating current pulse, so that the halogenated pollutants in the water are alternately subjected to electrochemical oxidation and electrochemical reduction, and the process is repeated. In the electrochemical oxidation stage, the halogenated pollutants can be oxidized through intermediate species such as direct electron transfer or indirectly generated hydroxyl free radicals or the combination of the two; in the electrochemical reduction stage, the halogenated pollutants can be reduced through direct electron transfer or hydrogen free radicals and other reducing intermediates, or through the combination of the direct electron transfer and the hydrogen free radicals, redox degradation of the halogenated pollutants is achieved. Compared with the prior art, the alternating-current pulse electrochemical method combines the advantages of an oxidation method and a reduction method, and has the characteristics of high reaction rate, more thorough degradation, high dehalogenation rate, no need of additional chemical reagents, high stability and lower electric energy consumption.

The invention discloses a manufacturing method of a degradable fiber plastic packaging bag, and belongs to the technical field of packaging bags, the manufacturing method comprises the following steps: S1, mixing deionized water, starch, chitosan and sodium carboxymethyl cellulose, and then gelatinizing to obtain a gelatinized solution; s2, mixing an organic solvent, polylactic acid, an emulsifier and a functional aid to obtain a polylactic acid solution; s3, mixing the gelatinized solution with a polylactic acid solution, and emulsifying to obtain a starch-based polylactic acid emulsion; s4, treating the paper pulp raw material into papermaking raw pulp; s5, laying starch-based polylactic acid fibers formed by spraying the starch-based polylactic acid emulsion on the surface of the papermaking raw pulp in the web curtain, and then drying to form a base paper layer and a toughening layer; s6, a heat sealing layer and a blocking layer are formed on the surface of the base paper layer and the surface of the toughening layer respectively, and then the plastic-substituted packaging paper is obtained; s7, manufacturing the plastic packaging paper into a plastic packaging bag; the plastic-substituted packaging bag disclosed by the invention has degradability and can form better protection on a packaged product.

The application discloses a kind of bio-based modified calcium carbonate powder preparation's reinforced toughening polylactic acid composite material and preparation method thereof, using bio-based aliphatic diacid to modify calcium carbonate powder, then bio-based epoxy compound is grafted on the surface of the carboxylated calcium carbonate powder, and bio-based modified calcium carbonate crosslinking agent is prepared.Subsequently, carboxylated calcium carbonate powder and bio-based modified calcium carbonate crosslinking agent are added to polylactic acid and middle, and high-strength high-toughness degradable polylactic acid composite material is prepared by blending melt extrusion.The prepared polylactic acid composite material system component is simple, effectively reduces compatibility conflict, realizes high-strength high-toughness and rapid degradation simultaneously, greatly reduces production cost, and can be applied to agricultural film, food, packaging and medical field.

This invention relates to the field of slow-release fertilizer technology, specifically to straw-based slow-release organic fertilizer and its preparation method. The slow-release organic fertilizer includes an organic fertilizer core loaded with organic matter and nitrogen, phosphorus, and potassium nutrients using straw biochar as a carrier, and a slow-release coating covering the core. The slow-release coating is a cross-linked network formed by phytic acid cross-linking a hydroxyl polysaccharide substrate through phosphodiester bonds. Each phytic acid molecule forms an average of 1.5-3 phosphodiester bonds, with the remaining phosphate groups remaining as free phosphate groups and coordinating with iron and / or zinc. The phosphodiester bonds constitute the hydrolytic substrate of rhizosphere phosphatase. When crops are phosphorus deficient, the phosphatase secreted hydrolyzes the cross-linked bonds, causing the coating to uncross-link, thereby increasing the nutrient release rate with increasing phosphatase activity and simultaneously releasing trace elements such as iron and zinc. This allows nutrient release to adaptively match the crop's phosphorus deficiency requirements. The nitrogen release rate in still water over 28 days meets the national standard for slow-release fertilizers, and significantly improves the phosphorus accumulation and nitrogen fertilizer utilization rate in phosphorus-deficient soils.

The invention relates to a biomass-filled degradable elastic particle and a preparation method thereof. The biomass-filled degradable elastic particles comprise 50 to 70 parts of poly (butylene terephthalate)-adipate, 0 to 10 parts of polylactic acid, 0 to 5 parts of polycaprolactone, 50 to 70 parts of an inorganic filler, 0 to 10 parts of silane coupling agent modified wood flour, 10 to 40 parts of silane coupling agent modified cork particles, 0.5 to 1.5 parts of an antioxidant, 1 to 3 parts of a chain extender and 0.5 to 1.5 parts of a lubricant. The biomass-filled degradable elastic particles are degradable, good in elasticity and excellent in comprehensive performance.

The environment-friendly degradable antibacterial corrugated carton comprises a carton body, the carton body is of a cuboid hollow structure, a base is installed at the bottom of the carton body, a cover plate is installed at the top of the carton body, and an antibacterial assembly is installed at the bottom of the inner side of the cover plate. All parts are prepared from degradable materials, can be biologically degraded in a natural soil environment after being abandoned, are free of white pollution residues, accord with national green logistics packaging policies and sustainable development requirements, are free of environmental protection burden, accord with the green concept, have long-acting antibacterial property and internal and external dual antibacterial effects, guarantee article sanitation, and are worthy of popularization and application. The overall structure is stable, and the compression resistance and deformation resistance are improved through the reinforcing ribs and the supporting keels.

The present application relates to waste gas treatment technical field, disclose a kind of wet chemical catalytic oxidation treatment device for treating VOCs organic waste gas, including reaction tube, and the lower end of reaction tube is connected with inlet pipe and liquid discharge pipe, and reaction tube is connected with reagent pipe and is penetrated, and the one end of reagent pipe is connected with spraying equipment, and the outside of spraying equipment is connected with knob for controlling spraying amount, and spraying equipment is arranged in the central position in reaction tube, and spraying equipment below is provided with lifting frame, and the outside of lifting frame is connected with sealing strip, and lifting frame is connected with catalytic screen frame on, and catalytic screen frame is filled with catalytic packing, and lifting frame is slidingly connected in reaction tube, and the upper end of lifting frame is connected with U-shaped frame.The present application effectively solves the problem of poor adaptability of fixed reaction area, and improves the reaction contact area to ensure the degradation effect at high air volume, reduces the invalid consumption of reagent at low air volume, and greatly improves the adaptability and reaction efficiency of the device for different waste gas conditions.

This invention relates to the field of new yarn materials technology, and more particularly to a thermally insulating biodegradable PLA napped composite yarn and its preparation method. The yarn uses core-sheath structure PLA filaments as the base yarn, with a core layer of PLA and a sheath layer of low-melting-point PLA or copolymer PLA. The monofilament cross-section is irregular and / or hollow. Air blowing is used to form loop / arc loop pile structures on the surface of the base yarn. Subsequently, under restricted shrinkage conditions, the pile is locked and shaped, with the locking temperature controlled above the sheath softening temperature and below the core melting peak, causing the sheath to soften locally at the contact points to form point-bonding locking points to fix the pile. The pile height quantile, coefficient of variation, and bulk index are detected online, and the airflow, feed difference, and shaping parameters are adjusted in a closed loop to achieve structural and performance stability during continuous production. This solution combines high bulk, high warmth retention, washability retention, and batch consistency.

The invention relates to the technical field of express bags, and discloses a degradable express bag material and a preparation method thereof, the degradable express bag material comprises the following components by weight: 20-55 parts of thermoplastic starch, 2-10 parts of plant fiber, 5-15 parts of modified starch, 10-25 parts of a mixed biodegradable material, 15-20 parts of paraformaldehyde (PFA), 5-15 parts of N-methyl pyrrolidone, and 20-45 parts of low density polyethylene, the degradable plastic is prepared from the following components in parts by weight: 10-30 parts of polylactic acid, 2-10 parts of polycaprolactone, 0.2-0.6 part of a photodegradation agent, 6-20 parts of filler master batch, 0.2-1.8 parts of a lubricant and 4-12 parts of a phase solvent. According to the degradable express bag material, various bio-based and degradable components such as the thermoplastic starch, the plant fibers, the polylactic acid and the polycaprolactone are adopted, the components can be rapidly decomposed in the natural environment, and pollution of a traditional plastic express bag to the environment is remarkably reduced. Meanwhile, the photodegradation agent and the photosensitizer are added, so that the degradation process of the material can be accelerated under the illumination condition, and the environmental friendliness of the material is further improved.

The utility model discloses a degradable composite non-woven fabric, and belongs to the technical field of laminated non-woven fabrics. The utility model relates to a degradable composite non-woven fabric, which comprises a'three-layer 'structure consisting of a bio-based fiber non-woven fabric base layer, a degradable high polymer material laminated film upper layer and a degradable high polymer material laminated film lower layer, and viscose fiber pores in the bio-based fiber non-woven fabric base layer are uniformly distributed; the melt I in the upper layer of the degradable high polymer material lamination extends into the pores of the viscose fiber, the melt II in the lower layer of the degradable high polymer material lamination extends into the pores of the viscose fiber, and the melt I and the melt II are bonded in the pores of the viscose fiber; in addition, the degradable high polymer material in the degradable high polymer material spraying film upper layer forms a film I on the front side of the bio-based fiber non-woven fabric base layer, and the degradable high polymer material in the degradable high polymer material spraying film lower layer forms a film II on the back side of the bio-based fiber non-woven fabric base layer. According to the laminated non-woven fabric disclosed by the utility model, the structure of the laminated non-woven fabric is particularly limited, so that the obtained laminated non-woven fabric has the characteristics of degradability, high stiffness and difficulty in layering, and the subsequent requirements are met.

The invention discloses a grease-jasmonic acid methyl ester nano composite material, a preparation method thereof and an application of the grease-jasmonic acid methyl ester nano composite material in improving the freezing resistance of young pear fruits, and relates to the technical field of nano pesticides and young pear fruit freezing resistance. Comprising the following steps: 1, preparing an epoxy tea oil monomer from camellia oil; 2, dissolving an epoxy tea oil monomer and hydroxyethyl acrylate into ethanol, adding an initiator, and uniformly mixing to obtain a mixed solution; 3, carrying out freeze-thaw cycle, and carrying out polymerization reaction and purification in a nitrogen environment; and 4, adding jasmonic acid methyl ester, and then inducing self-assembly of the plant oil-based polymer to obtain the plant oil-based polymer. The method has the beneficial effects that the grease has good adhesion, and hydroxyl of hydroxyethyl ester and functional groups such as carboxyl on the surfaces of the young pears are bonded through hydrogen bonds, so that the adhesion of the nano-pesticide on the surfaces of the pears is improved, the rain wash resistance of methyl jasmonate on the surfaces of the young pears is improved, and the methyl jasmonate can be kept on the surfaces of the young pears for a long time; a large amount of hydroxyl also has an anti-freezing function, so that the anti-freezing capability of the young pears is greatly improved.

The application belongs to the field of multilayer films, and particularly relates to a degradable multilayer high-barrier film and a preparation method and application thereof; the multilayer high-barrier film comprises: an outer layer / adhesion layer / barrier layer / adhesion layer / outer layer; wherein the outer layer is a blend I of polybutylene adipate terephthalate and inorganic fillers; the adhesion layer is a blend II of polybutylene adipate terephthalate and tackifying resin; and the barrier layer is polyglycolic acid. The application can prepare a multilayer film with good processability, non-layering, biodegradability and high barrier property.

The invention discloses a treatment device for groundwater pollution remediation, and relates to the technical field of sewage treatment.The treatment device comprises a first sedimentation tank, a second sedimentation tank, a third sedimentation tank and a fourth sedimentation tank, a first liquid outlet pipe, a first electromagnetic valve, a first liquid outlet pump and a second sedimentation tank are connected above one side of the first sedimentation tank; an adsorbent feeding mechanism and a decontamination flora feeding mechanism are arranged on the first sedimentation tank, a first pollution detection mechanism is arranged at the joint of the first liquid outlet pipe and the first sedimentation tank, and a first electromagnetic valve and a first liquid outlet pump are started when the standard is detected; a second liquid outlet pipe is connected above one side of the second sedimentation tank, a second electromagnetic valve is arranged and is communicated with the underground water body, a second pollution detection mechanism is arranged at the joint, and the second electromagnetic valve is started when the standard is detected; the bottom of one side of the first sedimentation tank is connected with a waste discharge pipe, a third electromagnetic valve, a waste discharge pump and a waste tank, the waste tank is communicated with the first sedimentation tank through a water return pipe with a water return pump, and a solid separation net is arranged at the joint; according to the method, the pollution remediation treatment effect can be improved, and secondary pollution is reduced.

This invention relates to the field of pet material technology, and more particularly to a multi-layered coated olive pit cat litter granule, comprising a core layer, a middle layer, and an outer layer. The core layer contains olive pit particles with a particle size of 1.5–3.0 mm. The middle layer coats the outer surface of the core layer and contains guar gum, sodium carboxymethyl cellulose, and zeolite powder. The outer layer coats the outer surface of the middle layer and contains ZAG complex, sodium bicarbonate, vegetable oil, and surfactant. The multi-layered coated olive pit cat litter granule provided by this invention achieves significant improvements in comprehensive performance across multiple dimensions, including water absorption, breakage resistance, deodorization, and antibacterial properties.

The invention relates to the technical field of plant fiber processing, in particular to a preparation method of environment-friendly plant fibers for tableware and a product thereof, the preparation method comprises the following steps: S1, collecting bamboos, mashing the bamboos into sheets, soaking the mashed bamboos in alkali liquor with the temperature of 40-50 DEG C, taking out and grinding to obtain ground bamboo powder; s2, the air-dried bamboos are soaked in an enzymolysis solution for 6-8 h at the soaking temperature of 50-60 DEG C, filtering is conducted, and filter residues are taken; s3, the filter residues are soaked in an alkali solution for 2-3 h at the soaking temperature of 70-80 DEG C, filtering is conducted, and filter residues are taken; s4, the filter residues are placed in a salt solution to be boiled, the boiling time is 1-2 h, the boiling temperature is 100-110 DEG C, filtering is conducted, and filter residues are taken; s5, cleaning the filter residues with water, and drying to obtain a primary product; s6, the primary product and wax are mixed at the temperature of 70-80 DEG C, the use amount of the wax is 4-8% of the weight of the primary product, and a semi-finished product is obtained; and S7, mixing the semi-finished product, polylactic acid, a hydroxyl silane coupling agent, glycerol, mica powder, castor oil and chitosan, and carrying out melt extrusion to obtain the environment-friendly plant fiber for tableware.

This invention relates to the field of packaging materials technology, and more particularly to a low water vapor transmission rate coating for packaging materials and its preparation method. The aforementioned low water vapor transmission rate coating for packaging materials comprises, by mass percentage: 25-40% modified polyurethane resin, 5-20% linear alkane compound, 3-15% hydrophobic modified acrylic resin, 1-5% amino-terminated polyamide amine, 1-5% silica microparticles, 3-5% hydroxyethyl cellulose, 0.1-0.5% amino curing agent, 1-3% water-based additives, and the balance being water. The coating formed by this invention has an ultra-low water vapor transmission rate and also possesses heat-sealing capabilities. It eliminates the need for additional adhesive, lamination, or coating processes, simplifying the processing. The resulting coating is transparent, with a surface dyne value >42, and does not affect the appearance of paper or subsequent printing processes.