63results about How to "Fully degradable" patented technology

The invention provides an anti-side leakage sanitary napkin, which includes a surface non-woven fabric and a bottom impermeable membrane disposed from the inside out. The surface non-woven fabric has a three-piece structure, the intermediate piece of surface non-woven fabric and the two-wing surface non-woven fabrics are sticked together, and the space between the intermediate piece of surface non-woven fabric and the bottom impermeable membrane is filled with a toilet paper coated wood pulp cellulose absorption core. The surface of the sanitary napkin provided by the invention is composed of 100% polylactic acid fiber or PLA/PBHV fiber hot blast nonwoven fabric. The polylactic acid fiber retains the original characteristics and does not cause any damage. As polylactic acid is formed by polymerization of lactic acid molecules as monomers and spinning, polylactic acid molecules with short molecular chains possibly exist on the fiber surface, so that the pH value of a polylactic acid non-woven fabric surface shows weak acidity and is consistent with that of human body skin. Also an odor removal function is provided. The lateral two pieces of non-woven fabrics have greater gram weight and thickness than the intermediate piece, and side leakage cannot be caused.

The invention provides a degradable rare earth magnesium alloy medical biomaterial which is prepared by taking magnesium as a base alloy and adding a rare earth, zinc and zirconium according to a certain proportion relationship; the degradable rare earth magnesium alloy comprises the chemical composition by the mass percentage: 0.5-2.0 wt.% of Y, 0.1-0.5 wt.% of Dy, 0.8-1.2 wt.% of Zn, 0.35-0.55 wt.% of Zr, and the balance Mg and inevitable impurities. At the same time, the invention provides a preparation method of the degradable rare earth magnesium alloy medical biomaterial. The degradable rare earth magnesium alloy medical biomaterial has the following advantages: 1, the degradable rare earth magnesium alloy medical biomaterial has good mechanical properties and processing performance, and can meet the need of medical implant materials; 2, the degradable rare earth magnesium alloy medical biomaterial has good corrosion resistance, not only can be completely degraded, but also can ensure an appropriate corrosion speed; and 3, toxicity of alloying elements has strict limitation. The degradable rare earth magnesium alloy medical biomaterial is mainly used in medical metal materials.

The invention provides a black sanitary towel. The black sanitary towel comprises a sanitary towel body, and the sanitary towel body comprises a surface non-woven fabric layer, an absorption core anda bottom impermeable membrane from top to bottom in sequence; the surface non-woven fabric layer comprises a middle sheet, retaining walls and side wings; the middle sheet is arranged in the middle ofthe surface non-woven fabric layer and used for cooperating with the bottom impermeable membrane and completely wrapping the absorption core; the side wings are arranged at the two sides of the surface non-woven fabric layer and used for fixing the sanitary towel body; the retaining walls are arranged at the two sides of the middle sheet and used for preventing an absorbed material which is absorbed by the middle sheet or the middle core from leaking from the sides; the side wings are fixedly connected with the middle sheet through partial retaining walls; the surface non-woven layer and thebottom impermeable membrane are both black. The black sanitary towel can meet the basic requirement of sanitary towels and have the advantages of bacterial inhibition, odor removal, moisture absorption and ventilation, soft and comfortable performance and complete degradation.

The invention relates to the field of disposable tableware, and aims to provide fully-degradable disposable vegetable fiber tableware which is capable of realizing full degradation. The fully-degradable disposable vegetable fiber tableware is prepared by mixing and pressing the following components in parts by weight: 65-80 parts of vegetable fibers, 6-8 parts of polyvinyl alcohol, 0.5-1.0 part of edible pigment, 1-2 parts of polyethylene wax, 1-2 parts of glycerol, 1-2 parts of sodium bicarbonate, 1-2 parts of edible gelatine, 1-2 parts of terpene resin and 1-2.5 parts of shellac.

The invention discloses a biological full-degradable plastic film, which is mainly prepared from the following raw materials by weight: 48-72 parts of cassava starch, 35-45 parts of glycerin, 35-45 parts of polyvinyl alcohol, and 4-6 parts of hydrophilic nano-silica, wherein the cassava starch and hydrophilic nano-silica are in a weight ratio of 12:1. The preparation method of the biological full-degradable plastic film includes: conducting high-speed mixing, banburying and film casting on the raw materials, then subjecting the obtained plastic film to ultraviolet radiation treatment, and then performing drying. The biological full-degradable plastic film provided by the invention has the advantages of excellent mechanical properties, fast degradation speed, simple formula, and low production cost, etc.

The invention discloses a disposable infusion device. The infusion device includes an infusion catheter, a dropping hopper, an anti-bubble liquid dropping device, a dropper body, a liquid inlet hole,a dropper body fixing base, a dropper body connecting catheter, a vent hole, an air inlet plug, a liquid inlet pipe, a liquid inlet needle, an air pressure balancing needle, a balancing pipe and a heavy ion microporous film; the integral anti-bubble liquid dropping device is composed of the dropper body above, the dropper body fixing base in the middle, the dropper body connecting catheter below and the heavy ion microporous film fixed into the dropper body connecting catheter; by additionally arranging the heavy ion microporous film, after infusion is finished, partial medicinal liquid can remain on the heavy iron microporous film, blood reflux caused by complete dropping of the medicinal liquid is avoided, and liquid stopping is achieved at the same time; the infusion catheter and the dropping hopper adopt modified polyvinyl chloride as a raw material, not only is the physical mechanical performance of a traditional polyvinyl chloride material preserved, but also complete degradationis achieved, pollution is not caused to the environment, and environmental protection is facilitated. Moreover, since DEHP and other toxic additives are not added during preparation, important indicators such as heavy metal content and cytotoxicity are all superior to those of congeneric polyvinyl chloride products, and the infusion device is much safer to use.

The invention discloses a composite crosslinking amylomaize based fully degradable material and a preparation method thereof, relating to a cornstarch based fully degradable material and a preparation method thereof and solving the problem that the traditional amylomaize based degradable material and a starch degradable material modified physically or chemically have poor mechanical property. The product is prepared from composite crosslinking amylomaize, polycaprolactone, calcium carbonate, solid paraffin, stearic acid and glycerol, wherein the composite crosslinking amylomaize is prepared form amylomaize, epichlorohydrin and sodium hexametaphosphate. The preparation method comprises the steps of adding the epichlorohydrin into the alkaline amylomaize and stirring; adding the sodium hexametaphosphate into the alkaline amylomaize and stirring, washing and filtering to obtain the composite crosslinking amylomaize; and finally mixing and calendaring the composite crosslinking amylomaize together with the calcium carbonate, the solid paraffin, the stearic acid and the glycerol. The composite crosslinking amylomaize based fully degradable material has the tensile strength of 28-40MPa and can be used as food wrappage and agricultural mulching films.

The invention relates to a polylactic acid (PLA)-based fully degradable material special for an anti-glare board and a preparation method for the PLA-based fully degradable material, and belongs to the technical field of the modification of polymer materials. The invention is characterized in that the material is prepared from the following raw materials in percentage by mass: 60 to 68 percent of polylactic acid, 20 to 30 percent of toughened and reinforced modifier, 0.25 to 0.35 percent of tetra[3-(3',5'-ditert-butyl-4'-hydroxylphenyl)propionic acid]pentaerythritol ester, 0.2 to 0.3 percent of 2-hydroxy-4-(octyloxy)benzophenone, 2.0 to 2.6 percent of stearic acid, 0.1 to 0.2 percent of phthalocyanine green and 5 to 11 percent of acetyl-tri-n-butyl citrate. The special material has full degradation performance and does not pollute the environment. Three basic elements, namely 'blowing resistance, impact resistance and unchanged color' which are used for the making of anti-glare boards can be met, so the material is a preferred high-quality material for the making of third-generation anti-glare boards.

The invention belongs to the technical field of building materials, particularly discloses an alkali lignin and polylactic acid resin composite environmentally-friendly plate, and further discloses apreparation method of the alkali lignin and polylactic acid resin composite environmentally-friendly plate. The alkali lignin and polylactic acid resin composite environmentally-friendly plate is formed by hot-pressing and co-extruding a first outer surface layer, a buffer layer, an inner layer and a second outer surface layer which are sequentially stacked, and the first outer surface layer, thebuffer layer, the inner layer and the second outer surface layer are respectively prepared from alkali lignin and polylactic resin particles, powder particles and polylactic resin particles in different proportions. The alkali lignin and the polylactic acid are combined and developed to obtain the novel degradable plate, so that the high-valued utilization of the alkali lignin can be realized, theuse requirements of buildings and home decoration industries can be met, the use amount of wood in building materials can be reduced, and low-carbon, environmentally-friendly and green economy is realized.

According to the preparation method of the anti-deformation acrylic plate with the heat insulation and heat preservation functions, the acrylic plate base layer is prepared in a methyl methacrylate, butyl acrylate and diallyl adipate ternary polymerization mode, the strength of the acrylic plate is greatly improved, and the mechanical property is improved; wheat straw fibers and glass fibers are mixed and woven to prepare a fiber layer, and the fiber layer is used as an anti-deformation layer to enhance the anti-deformation capability of the acrylic plate; nano-silver-loaded nanofiber crystals are prepared from nanocrystalline cellulose, glucose and a silver ammonia solution, the antibacterial property of the acrylic plate is improved, and after graphene oxide quantum dots are added, the fiber entanglement capacity is improved, the internal stress of the acrylic plate is reduced, and the thermal insulation performance of the acrylic plate is improved; the hollow glass beads are uniformly dispersed in the foamed polyurethane to prepare the heat preservation layer, the hollow glass beads and the foamed polyurethane play a synergistic role in improving the heat resistance of the acrylic plate, and the heat insulation and heat preservation performance of the acrylic plate can be greatly improved by optimizing the component proportion.

The invention provides a manufacturing method of an artificial inorganic imitated stone texture decorative plate, the modified cellulose is prepared from the wheat straw and the corn straw, and the mechanical property of the decorative plate is improved through the synergistic effect of the modified cellulose, the coal ash and the white carbon black; foamed glass is prepared by uniformly coating the surfaces of hollow glass beads with a layer of graphite-like phase carbon nitride, and the foamed glass is pressed on the main body mixture to form a thermal insulation layer, so that the high temperature resistance and flame retardance of the decorative plate are improved; by adding and rographolide and radix isatidis, the mildew-proof and antibacterial properties of the decorative plate are improved; the insulating layer is coated with an imitated stone coating. The decorative plate produced by the method realizes reasonable matching of high strength, obdurability, high temperature resistance and water resistance, and has the advantages of lower production cost, higher process applicability, higher operability, controllable product quality and the like.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an energy-saving environmentally-friendly treatment method for sewage in a power generation system. Aiming at the prior art that in the treatment process of landfill leachate, more incineration equipment is required, and combustion heat cannot be effectively utilized, the invention provides the following technical solution: [1] performing primary sedimentation to remove suspended matter; [2] allowing an influent water quantity and influent water quality to be uniform respectively by utilizing a quantity homogenizing tank and a quality homogenizing tank; [3] performing an anaerobic reaction in an anaerobic reaction tank, collecting biogas generated by the anaerobic reaction, introducing the biogas into an incinerator, and performing incineration to generate a high-temperature flue gas; [4] performing nitrification: performing denitrification treatment; [5] performing a membrane biological reaction: performing solid-liquid separation, and performing a biochemical reaction on the sewage; [6] performing nanofiltration: performing nanofiltration to further remove macromolecular organic matter and high-valent charged ions in water to obtain a treated clear liquid; and [7] performing incineration on sludge: collecting the sludge produced in each step, performing uniform preheating and drying, sending the dried sludge to an incinerator, and performing incineration. The method provided by the invention is applicable to treatment of the landfill leachate.

A rotator cuff patch based on fibroin gel comprises a rotator cuff patch body, a fibroin electrostatic spinning membrane serving as a patch base layer, fibroin gel containing Mg < 2 + > ions serving as a load anti-inflammatory drug layer and fibroin gel containing Zn < 2 + > ions serving as a load healing promoting drug layer, and the rotator cuff patch has the full-degradation characteristic, inhibits inflammatory response in the early stage, promotes osteogenesis in the repair period, and has the advantages of being free of side effects, free of side effects and the like. The effect of promoting graft integration is achieved, and the biological safety is higher.

A rotator cuff patch based on a cellulose gelatin coating comprises a rotator cuff patch body, a cellulose electrostatic spinning membrane serving as a patch substrate layer, gelatin containing chondroitin sulfate serving as a load anti-inflammatory drug layer and gelatin containing astragalus extract serving as a load healing promoting drug layer, and the rotator cuff patch can inhibit inflammatory reaction in the early stage, promote tissue regeneration in the repair period and promote healing. The effect of promoting graft integration is achieved.

The invention discloses an organic matter photocatalytic degradation device and system. The invention relates to the technical field of organic wastewater treatment. The device comprises a reaction chamber and a water storage chamber, a fluid inlet is formed in the upper part of the reaction chamber, the lower part of the reaction chamber is communicated with the water storage chamber through a fluid channel, a fluid outlet is formed in the lower part of the water storage chamber and is higher than the fluid channel. The system comprises a plurality of layers of the organic matter photocatalytic degradation devices which are sequentially communicated, the reaction chambers are used for mounting a photocatalytic light source and storing photocatalytic particles, organic wastewater and gas are introduced through the fluid inlet, sufficient oxygen can be provided for the photocatalytic particles, and excessive moisture near the photocatalytic light source can be taken away; gas flows intothe reaction chambers in the fluid outlet direction, the organic wastewater in the reaction chambers is promoted to roll and shift the photocatalytic particles and clean the outer wall of the photocatalytic light source, so that organic matters in the organic wastewater are fully adsorbed and degraded, and the photocatalytic degradation efficiency of the organic matters is improved.

The invention discloses a preparation method of a thermoplastic starch material based on non-grain woody plant oil and fat. The preparation method comprises the steps of stirring fatty acid and derivatives thereof, heating and controlling the temperature to 140-160 DEG C; then, dropwise adding micromolecular polyamine according to the proportion that the mole ratio of the carboxy group of the micromolecular polyamine to the carboxy groups of the fatty acid and the derivatives thereof is (1.1-1.4):1; then, adding a catalyst, wherein the catalyst accounts for 0.25-2.5% of the total mass of a reaction system; raising the temperature to 180-220 DEG C, reacting for 1-4h, and removing unreacted micromolecular polyamine through reduced pressure distillation to obtain an aliphatic amide plasticizer; uniformly mixing the prepared aliphatic amide plasticizer, glycerol and starch according to the mass proportion of (10-50):(10-30):70, collecting the material and storing the material in a sealed way at room temperature for 12-36h; finally, processing the material under the condition of 100-160 DEG C by using a kneading method to obtain the thermoplastic starch material.