34 results about "Polylactic acid" patented technology

The invention relates to a preparation method of a PLA strand filtering rod capable of lowering flue-gas temperature and reducing suction resistance. The preparation method includes the steps of preparing a phase-change material mixture, preparing phase-change materials containing fragrant substances, preparing a fragrant filtering rod body capable of slowly releasing fragrance and the like. By increasing the addition quantity of the phase-change materials for combination with the PLA strand filtering rod body capable of reducing suction resistance and conducting triple cooling, the overall smoking taste of cigarettes and heating non-burning cigarettes is improved, and meanwhile, the flue-gas temperature is also lowered; smoking comfort is improved for customers, the process flows are simple, and the preparation method is suitable for industrial production.

The invention provides a three-dimensional wrinkle polylactic acid microballoon and a preparation method and uses thereof. The preparation method of the three-dimensional wrinkle polylactic acid microballoons is as follows: adopting ammonium bicarbonate deionized water solution of Fe3O4@ SiO2 nanoparticles as an inner phase, dichloromethane solution of polylactic acid as an interphase, deionized water solution of polyvinyl alcohol as an outer phase, and obtaining the three-dimensional wrinkle polylactic acid microballoons. The gas produced by the ammonium bicarbonate introduces mismatched stresses at emulsion interface, the nanoparticles added in the emulsion introduce multiple-gasification cores, and the three-dimensional wrinkle polylactic acid microballoons are successfully prepared and used in oil water separation and cell adsorption. The three-dimensional wrinkle polylactic acid microballoons are in multi-stage porous structure which can effectively increase specific surface area and can be used effectively in oil-water separation, and has good bio-compatibility which can be used in effective cell adhesion. The three-dimensional wrinkle polylactic acid microballoons have an excellent prospect in bio-application.

Environmental-friendly foaming plastic and a preparing method thereof are disclosed. The plastic comprises following raw materials by weight: starch-grafted ABS, polylactic acid (PLA), poly(hydroxy ester ether), plant powder, wood fiber, a silane coupling agent KH550, aluminate, ethylene vinyl acetate copolymer (EVA), polystyrene (PS), dipentaerythritol ester PCB, glycerin, polyethylene wax, azodicarbonamide (AC), p-toluenesulfonhydrazide (TSH), nanometer calcium carbonate, superfine talcum powder, kaolin, titanium dioxide, an antioxidant 2246 and an antioxidant BHT. The plastic has good heat resistance, corrosion resistance and processing performance like traditional foaming plastic and is excellent in biodegradability so as to avoid environment pollution.

The invention proposes a PE (polyethylene) plastic wrap, which is prepared from the following materials in parts by weight: 15 to 35 percent of polyethylene, 4 to 8 percent of Arabic gum, 1 to 5 percent of polylactic acid, 1 to 6 percent of glycerol, 1 to 5 percent of chitosan, 1 to 5 percent of xylan, 1 to 5 percent of glacial acetic acid, 0.5 to 1 percent of white pigment, 0.5 to 1 percent of antioxidant, 0.5 to 1 percent of preservative and the balance of deionized water. The PE plastic wrap proposed by the invention has the advantages of long preservation time, good effect, high oxidationresistance and antibacterial property, full degradability and the like.

The invention discloses a polylactic acid/chitosan composite nano fiber scaffold, a preparation method and application thereof. The matrix of the scaffold is polylactic acid nano fiber scaffold, and the outer wall and inner pores of the polylactic acid nano fiber scaffold are evenly distributed with chitosan nano fiber. The preparation method comprises the following steps: first filling the inner pores of the polylactic acid nano fiber scaffold prepared by primary phase separation with chitosan acetum; and then evenly distributing the chitosan nano fiber prepared by secondary phase separation on the outer wall and inner pores of the polylactic acid nano fiber scaffold to obtain bionic polylactic acid/chitosan composite nano fiber scaffold. The invention has simple preparation method, the structure of the obtained nano fiber scaffold is similar to that of natural extracellular marix, has good mechanical property and biocompatibility, can effectively promote migration, growth and differentiation of osteocyte.

The invention relates to a halogen-free flame-retardant basalt fiber reinforced polylactic acid composite material and a preparation method thereof and belongs to the technical field of processing and application of halogen-free flame-retardant plastic. The composite material is mainly prepared from the following raw materials: polylactic acid, basalt fibers, hypophosphite, a nitrogen-containing flame retardant and a compatilizer in a weight ratio of (36-79.2):(10-30):(5-15):(5-10):(0.5-5). The preparation method comprises the following steps: uniformly mixing the raw materials by corresponding weight; and sequentially fusing, blending, extruding, bracing, cooling, dicing and drying. By using basalt fibers as a reinforcing material and hypophosphite and the nitrogen-containing flame retardant as a halogen-free flame retardant, the composite material is applied to modifying polylactic acid, so that the material is endowed with characteristics of excellent flame retardance, good mechanical property, environmental friendliness and the like. The composite material provided by the invention is simple in preparation process, low in cost and environment-friendly, can be used for overcoming the defects that the conventional polymer flame retardant modifying technology is poor in flame retardance, poor in mechanical property, great in environmental hazards and the like and has broad market application prospect.

The invention discloses a composite degradation material of aluminum hydroxide-poly-butylene succinate and a preparation technology thereof, the composite degradation material is made by blending and extruding the materials of aluminum hydroxide and the poly-butylene succinate, etc. and an addition agent; the weight percentage is as follows: 40 to 50 percent of the aluminum hydroxide, 35 to 50 percent of the poly-butylene succinate, 5 to 10 percent of polylactic acid, 5 to 10 percent of starch and1.5 percent of the addition agent. The composite degradation material can reduce the production cost of the degradation materials, improve the performance of products and can be widely applied in fields such as toys, electronics and industrial packaging, etc.

The invention discloses a biodegradable 3D printing toughening material and a preparation method, which consists of the following components by weight: polylactic acid (PLA): 70-80 parts; EVA: 30-20 parts; toughening agent: 6-8 parts; compatibilizer: 0.4-5.0 parts; auxiliary agent: 0.2-2.0 parts. The toughening agent is dioctyl phthalate (DOP); the compatibilizer includes maleic anhydride grafted polymer, which is a tertiary polymer formed by copolymerization of methyl methacrylate, butadiene and styrene copolymer. Copolymer; terpolymer (SAG) formed by copolymerization of styrene, acrylonitrile and glycidyl methacrylate. One or two or more compatibilizers are used together. The 3D printing composite material prepared by the invention is non-toxic and environment-friendly, has superior comprehensive performance, and has broad market prospects and application value.

The invention discloses a disperse dye compound as well as a preparation method and an application thereof. The structural formula of the disperse dye compound is shown in the formula I in the specification, wherein in the formula I, D represents disperse dye chromogen, and R represents alkyl. Azo-disperse dyes containing single aliphatic hydroxyl groups in molecular structures are selected to serve as chromogen and have a coupled reaction with a dicarbonyl dichloride compound, and the disperse dye compound is prepared; when the disperse dye compound is applied to dyeing of spandex or polylactic acid fiber, washing fastness and dry-heat-resistant firmness are remarkably improved.

The invention discloses a degradable environment-friendly efficient dust suppressant and a preparation method and use method thereof. The efficient dust suppressant is prepared from the following rawmaterials in percentage by weight: 6 to 10 percent of a water-based degradable emulsion; 1 to 3 percent of modified starch, 0.3 to 0.8 percent of modified cellulose, 0.2 to 0.6 percent of a dispersingagent, 0.1 to 0.5 percent of a wetting agent and 86 to 92 percent of water. The dust suppressant provided by the invention adopts starch, polylactic acid and other water-based degradable materials asmain raw materials, the starch and the polylactic acid can be automatically degraded after reaching the service life, residues polluting the environment cannot be generated, secondary pollution is avoided, and the dust suppressant is an environment-friendly material.

The invention provides a high-adsorption polylactic acid composite biofilm carrier material, which is prepared from the following raw materials by weight: 8-10 parts of diatomaceous earth, 14-18 partsof polylactic acid, 0.3-0.4 part of graphene oxide, 4-6 parts of cassava starch, 2-3 parts of gum arabic, 40-50 parts of polypropylene, 8-12 parts of chitosan, 2-4 parts of nanometer carbon sol, 3-5parts of lignocellulose, 1-2 parts of bentonite, 1-2 parts of hexadecyl trimethyl ammonium bromide, 0.5-1.5 parts of silica sol, 0.3-0.5 part of sodium humate, and 15-20 parts of water. The inventionfurther provides a preparation method of the high-adsorption polylactic acid composite biofilm carrier material. According to the present invention, the high-adsorption polylactic acid composite biofilm carrier material has advantages of light weight, large surface activation area, rich carbon source and low influence of environmental temperature change on adsorption performance; and the filler prepared from the high-adsorption polylactic acid composite biofilm carrier material has advantages of good fluidity, less agglomeration, good adsorption performance, corrosion resistance, duration, high efficiency and the like so as to further improve the water purification effect.

The invention relates to the technical field of fiber production, in particular to stock-solution-coloring high-melting-point polylactic acid fibers and a preparation method thereof. The stock-solution-coloring high-melting-point polylactic acid fibers are prepared by stock-solution-coloring high-melting-point polylactic acid master batch and polylactic acid sections of two configurations throughspinning. The stock-solution-coloring high-melting-point polylactic acid fibers and the preparation method thereof have the advantages that the defect that the polylactic acid fibers are difficult indark color coloring due to the fact that post-coloring needs to be performed on high-melting-point polylactic acid fibers in the prior art is overcome, and the defect that fabric wearability loweringcaused by the post-coloring and ironing of polylactic acid fabric is overcome; a garment purely spun by the stock-solution-coloring high-melting-point polylactic acid fibers or spun by the stock-solution-coloring high-melting-point polylactic acid fibers and other fibers in a blended manner is high in color fastness, good in temperature resistance, glossy, good in touch, loose, comfortable, breathable, capable of transferring moisture and absorbing sweat, resistant to ultraviolet, biodegradable and the like.

High-strength wear-resistant environmental-friendly plastic and a preparing method thereof are disclosed. The plastic comprises following raw materials by weight: PAA copolymer, polylactic acid (PLA), ethylene-vinyl acetate copolymer (EVA), plant powder, graphite fiber, a silane coupling agent KH550, ABS-grafted maleic anhydride, styrene-butadiene thermoplastic elastomer (SBS), methyl methacrylate-butadiene-styrene copolymer (MBS), hydrogenated styrene-butadiene-styrene block copolymer (SEBS), dipentaerythritol ester PCB, octyl esters of epoxidized soybean oil, tributyl citrate, glyceryl monostearate, kaolin, coal ash, silk white powder, white carbon black and an antioxidant SP. The PAA copolymer is prepared by reacting 6-aminocaproic acid and gamma-aminobutyric acid in a mole ratio of 5-10:0.5-4. The plastic is excellent in wear resistance and strength, and can be fully degraded into water and carbon dioxide under actions of light/bacteria so as to avoid environment pollution.

The invention discloses a block copolymer modified amphipathy polylactic acid composite membrane and a preparation method, and aims to solve the problems of poor hydrophily of polylactic acid materials, a current scheme for improving the hydrophily of the polylactic acid materials has various shortcoming and the like, block polymers of polylactic acid, polyethylene glycol and polylactic acid polyethylene glycol serve as main material substrates, phase separation is induced by the aid of a heat treatment process, surfaces of hydrophilic phases are accumulated, the amphiphilic composite membraneis formed and has a hydrophobic polylactic acid structure, a hydrophilic shell covers the hydrophobic polylactic acid structure, the introduced block copolymer has an excellent interphase link function, and break of a polylactic acid-polyethylene glycol is avoided. The composite membrane has the advantages that the membrane is easy to form, simple in process and low in cost, the mechanical properties of pure polylactic acid are retained when amphipathy is achieved, two-phase regions have good binding force, breaking is not easily caused and the like.

The invention discloses a preparation method of a non-woven fabric, and belongs to the field of spinning. Sodium pyrophosphate, glucose, sodium hydroxide, ferrous sulfate and water are sampled, nitrogen protection is adopted, heating and stirring are performed, and then cumyl hydroperoxide and polybutadiene are added and stirred and mixed; a stirring mixture, allyl benzene, methyl methacrylate, epoxypropyl methacrylate and dibenzyl phthalate are obtained to be added into magnesium sulfate, stirring, mixing and drying are performed, a drying object is obtained to be added into polylactic acid to be mixed, and a mixed matrix is obtained; folium eriohotryae and aloe are obtained to be mixed and homogenized, deionized water is added for digestion and suction filtration, a filtrate is obtainedfor centrifuging, a supernate is obtained to be added into a copper nitrate solution to be mixed, and an antibiotic finish solution is obtained; processed linen fiber, a dispersing solution and the antibiotic finish solution are obtained to be soaked and filtered, the linen fiber is taken to be cleaned with deionized water, and linen fiber is obtained; linen fiber, the mixed matrix, polypropyleneand sodium alginate are obtained to be mixed for opening, carding and lapping, the mixture is placed into a needle machine for needling treatment, and hot rolling is performed to obtain the non-wovenfabric.

The invention discloses an attractive, elegant and high-impact-resistance automobile trim material. The attractive, elegant and high-impact-resistance automobile trim material is prepared from, by weight, 30-35 parts of bamboo fibers, 2-3 parts of antimonous oxide, 5-7 parts of shell powder, 10-12 parts of waterborne polyurethane, 0.2-0.4 part of silane coupling agent kh570, 1-2 parts of polyethylene wax, 10-13 parts of polyvinyl alcohol, 100-105 parts of polylactic acid, 60-68 parts of dimethylacetamide, 30-35 parts of dimethyl sulfoxide, 9.4-10.2 parts of shale stone, 3.5-4.5 parts of hydroxyethylmethylcellulose, 5.5-6.5 parts of strontium carbonate, 7.9-8.7 parts of dry coconut shell powder and a proper amount of deionized water. A preparation method is simple and controllable and low in production cost, and the material has the advantages of being good in stability, attractive, elegant, good in impact resistance, high in strength, resistant to fire and abrasion and the like, and is worthy of being popularized.

The invention belongs to the technical field of polymer materials, and particularly relates to application of a porous polymer film with regular pores to preparation of an artificial periosteum. The shape memory polyurethane provided by the invention is formed by polymerizing diisocyanate and a soft segment polymer, the soft segment polymer is polylactic acid, polyglycolic acid, polycaprolactone, polypolyol or a copolymer of at least two of the polylactic acid, the polyglycolic acid, the polycaprolactone and the polypolyol. The shape memory polyurethane material is combined with a water drop template method to form a porous polymer film containing a crystal structure. The porous film material has excellent mechanical properties, can meet performance requirements of application scenes such as artificial periosteum and the like, and has a good application prospect.

The invention discloses a medical cotton swab capable of adhering to the wound surface to promote healing. The medical cotton swab comprises a cotton stick and composite fiber cotton wrapping the end of the cotton stick. According to the cotton swab, traditional absorbent cotton is replaced with renewable and degradable composite polylactic acid fiber cotton to reduce the production cost and overcome the inherent defects of the absorbent cotton without generating adverse effects on the wound surface. The surface of the cotton swab is grafted with a polydopamine-polyvinylpyrrolidone/multiwalled carbon nanotube film in an adhering mode to form the composite fiber cotton with certain adhesion, which can adhere to the wound surface to enhance the effect of disinfection and sterilization and accelerate wound healing. The production process of the cotton swab is simple and efficient, materials in various links can be recycled, and no adverse effect is generated on the environment.

The invention provides a preparation method of microcapsules. The preparation method comprises the following steps: preparing low molecular weight fibroin; mixing the low molecular weight fibroin to atea leaf immersing water solution and sufficiently stirring to obtain rubbed fibroin; blending polylactic acid and the rubbed fibroin into de-ionized water to prepare a fibroin-polylactic acid blended solution; uniformly mixing the fibroin-polylactic acid blended solution with indomethacin medicine powder, liquid paraffin wax and Span 80; stirring at a high speed and emulsifying and molding; after keeping a certain time, slowly adding glutaraldehyde and carrying out crosslinking; washing to prepare the microcapsules. The fibroin-polylactic acid microcapsules provided by the invention have a good membrane forming property and good biocompatibility.

The invention relates to a recoverable and degradable release material and a preparation method thereof, and belongs to the technical field of release materials. The release material comprises a base material layer and a release agent coating arranged on the base material layer, and further comprises a biological substrate coating arranged between the base material layer and the release agent coating, the base material layer is a film-based material layer or a paper-based material layer; the paper-based material layer comprises bio-based raw paper and a film-based material; and the biological substrate coating is acrylate. The raw material components of the acrylate are SARBIO@5201, SARBIO@5400, SARBIO@6100 and an initiator 184, and the raw material components of the film base material are polylactic acid resin, poly (butylene carbonate), an antioxidant and an inorganic filler; the bio-based body paper comprises the following raw material components: gelatinized starch glue and paper powder. The prepared release material can be recycled, waste is reduced, and the concept of green and environment-friendly development is met.

The invention belongs to the technical field of textiles, and particularly relates to an antibacterial nanofiber. The inner layer is prepared from the following raw materials in parts by weight: 40 to55 parts of polyester, 20 to 40 parts of polylactic acid, 0.01 to 1 part of silver powder, 0.01 to 0.9 part of a coupling agent, 0.1 to 0.8 part of a surfactant, 3 to 8 parts of bamboo charcoal powder, 4 to 7 parts of an organic solvent and 0.1 to 1 part of a dispersing agent; the outer layer is prepared from the following raw materials in parts by weight: 10 to 15 parts of modified polypropylene, 7 to 8 parts of polyacrylonitrile, 10 to 15 parts of polyurethane and 60 to 70 parts of polylactic acid; the separating device comprises a box body; the left side of the box body is fixedly connected with a material passing pipe; a flowing table is fixedly connected to the inner wall of the left side of the bottom of the box; the inner wall of the middle of the box body is rotationally connectedwith a rotating shaft; the rotating shaft is driven by an external motor; and filtering plates which are uniformly and circumferentially arranged are fixedly connected to the surface of the rotatingshaft. Clothes woven by the antibacterial nanofiber have the advantages of being antistatic, antibacterial, long in service life, comfortable to wear and the like.

The invention discloses stereocomplex polylactic acid and a preparation method thereof. The preparation method comprises the following steps: fully drying PLLA and PDLA in a vacuum drying oven until the water content is less than 300ppm; heating graphene oxide to 120-200 DEG C in a vacuum drying oven, conducting drying for 1-60 minutes, conducting cooling to room temperature under a vacuum condition, taking out and sealing the cooled material for later use; and fully mixing the obtained material, and conducting internal mixing in an internal mixer, wherein the internal mixing temperature is smaller than or equal to the sum of the heating temperature of graphene oxide in the S2 in the vacuum environment and the temperature of +(0-50) DEG C, the rotating speed is 10-100 rpm, and the time is 3-10 minutes. The prepared stereocomplex polylactic acid can still keep a product with high SC content after multiple melting heat treatment, and the preparation method is simple and convenient.

The invention discloses a preparation method of biodegradable cast film paper, which comprises the steps of weighing the following raw materials in parts by weight: 60 to 70 parts of poly (butylene terephthalate)-adipate, 30 to 40 parts of polylactic acid, 10 to 15 parts of polyethylene glycol, 2 to 4 parts of citrate, 5 to 8 parts of nanofibers, 2 to 4 parts of silicon dioxide and 2 to 4 parts of a silicone slipping agent, wherein the molecular weight of the silicone slipping agent is 0.9-1.1 million. The manufacturing method comprises the steps of mixing the raw materials, carrying out mixing extrusion through a twin-screw extruder, and granulating the extruded material to prepare plastic particles; preparing the plastic particles into a film by adopting a tape casting method; and performing uniaxial stretching on the film, and performing stretching and shaping to obtain a finished product. By adopting the manufacturing method of the biodegradable cast film paper, the problem that a cast film cannot be degraded is solved, meanwhile, the water vapor permeability is relatively good, the cost is reduced, and the preparation method is simple.