35results about How to "Does not affect biodegradability" patented technology

The invention belongs to the field of biodegradable materials, and discloses a water vapor barrier biodegradable polymer film and its preparation and application. The preparation method is to firstly blend a biodegradable polymer and a crosslinking agent to obtain a special The material is formed into a thick film, and then the thick film is biaxially stretched, and finally electron beam irradiation is performed to obtain a water vapor barrier biodegradable polymer film, which improves the water vapor barrier properties of the biodegradable polymer film. The present invention improves the overall flow process design of the preparation method and modifies the biodegradable polymer film by using the biaxial stretching process and electron beam irradiation technology, which can effectively solve the problem of poor water vapor barrier properties of the biodegradable polymer film. It can be widely used in many fields such as agricultural mulching film, food and daily necessities packaging, and electronic product packaging.

The invention discloses a green and environment-friendly toughened strong-antibacterial degradable polylactic acid composite and a preparation method thereof. The composite is prepared from, by weight, 1000 parts of polylactic acid, 3-18 parts of chain extender, 7-20 parts of nanometer zinc oxide, 0.20-0.55 part of coupling agent and 1-8 parts of chlorophyll copper acid. According to the visible light absorption and transmission principle of the chlorophyll copper acid, with the nanometer zinc oxide processed by the chlorophyll copper acid and the coupling agent as a composite antibacterial agent, the visible light utilization rate of the nanometer zinc oxide is increased; through the environment-friendly small-molecule chain extender, the molecular weight of the polylactic acid is improved, the composite has the strong antibacterial performance, and the mechanical property and thermal property are improved; meanwhile, the greenness, environmentally friendliness and complete degradability characteristics of the polylactic acid are kept. Through the simple preparation process, the green and environment-friendly completely-degradable polylactic acid composite with strong antibacterial performance, the improved mechanical property and the improved thermal property is obtained.

The invention discloses an inflaming retarding type degradable composite material for hot melting type 3D (Three-Dimensional) printing and a preparation method thereof. Set raw materials are added into a high-speed mixer according to a formula ratio to be mixed; the raw materials comprise the following components in percentages by mass: 40 to 95 percent of degradable matrix material, 2 to 40 percent of expanding inflaming-retarding system and 1 to 40 percent of modified reinforcing fiber; a mixture is added into a screw extruder and is drawn to be a filament strip, the diameter of which is 1.75mm or 3mm, for later use after being subjected to fusion and mixing. The composite material has the characteristics of good degradation performance, high inflaming retarding performance, high toughness and high strength, and is applicable to the fused-deposition quick modeling of 3D printing.

The invention discloses a preparation method and application for a biomass fibre-aliphatic polyester composite material macromolecular coupling agent. The preparation method comprises the following steps: (1) synthesis for a biomass constituent-based macromolecular coupling agent; (2) surface hydrophobic modification for biomass fibre raw materials; (3) compounding for the modified biomass fibre raw materials and an aliphatic polyester matrix. The method can be used for various aliphatic polyester matrixes and is low in raw material limit; moreover, the composite material product is wide in application and can be used for the fields of household appliances, automobile industry, packaging, daily necessities and the like. The method is low in production cost, beneficial to popularize and apply, and has great significance in the aspects of improving the utilization level of biomass raw materials, alleviating petroleum resource crisis, protecting environment, and the like.

The invention discloses a biodegradable high-polymer additive with a branching structure, a preparation method and application thereof. A branched polymer provided by the invention is formed by combining sequential ring opening polymerization and coordination ring opening polymerization of negative ions, polycaprolactone (PCL) and poly l-lactic acid (PLLA) or poly d-lactic acid (PDLA) and propanol polyepoxide are prepared into a graft polymer with a controllable structure. The length of each inlay section of a main chain of the branched polymer and the length of a grafted chain can be regulated and controlled by changing a monomer feeding rate. The branched polymer not only has good volume increasing effect for a polylactic acid / polycaprolactone blend system, but also can reduce the melt viscosity and improve the processability of blends.

The invention discloses a method for preparing an aliphatic polyester composite material through surface modified chemithermomechanical pulp (CTMP) fibers. The method comprises the following steps: (1) performing surface hydrophobic pretreatment on the CTMP fibers by using an unbonding agent; (2) preparing CTMP fiber pulp sheets and performing dry dissociation on the CTMP fibers subjected to hydrophobic treatment; and (3) compounding the CTMP fibers subjected to hydrophobic modification and a thermoplastic resin matrix. According to the fibers subjected to surface hydrophobic treatment, the hydrogen bonding action between the fibers is weakened, the aggregation effect in a polymer matrix is reduced, and the interfacial strength of the composite material is improved, so that the composite material has excellent comprehensive performance, particularly mechanical property. The method can be used for multiple aliphatic polyester matrixes, the raw material limitation is low, and the composite material is wide in application and can be used for the fields of household appliances, automobile industry, packaging and articles of everyday use. The method is low in production cost, contributes to popularization and application and has high significance for improving the utilization level of biomass raw materials, relieving oil resource crisis and protecting the environment.

The invention provides a complete biodegradable foam cushioning packing material and method for preparation, characterized in that starch over 80% content is used as base-material, ultra-fine polyvinyl alcohol is used as film forming intensifier, water is used as foaming agent, and core forming agent and flow modifier are added, wherein the mixture is amalgamated through blending homogeneous machine and fed into reverse-flighted screw extrusion machine for one-shot extrusion forming. The product can be used to substitute polystyrene foam for filling with no requirement on shapes.

The invention discloses a plant ecological interior wall coating and a preparation method thereof. The plant ecological interior wall coating is characterized by being prepared from a titanium dioxide filler, a borax crosslinking agent, an oxidizing agent, water, plant starch serving as a binding agent and sol serving as a binding agent modifier. According to the plant ecological interior wall coating, the plant starch is utilized as the binding agent, no synthetic resin emulsion is contained, complete biodegradation can be achieved, and the coating is an ecological environment-friendly interior wall coating in the true sense; the sol is added to serve as the binding agent modifier, the higher film coating binding force and film coating strength are achieved, and the technical property can reach the GB / T9756-2009 standard of a qualified synthetic resin emulsion interior wall coating product and is obviously suprior to the JC / T423-91 technical requirements for a water-soluble interior wall coating.

The invention relates to a preparation method of PBAT fiber. When the PBAT fiber is spun, the processes of cooling, bundling, oiling, drafting and winding are carried out in sequence. The cooling adopts a combination of slow cooling and strong cooling. The cooling section includes a slow cooling section. and strong cooling section; the slow cooling section refers to that when the wire strands are cooled to 110-130°C, the strands are cooled to 50-70°C under a cooling tunnel of 10-15 meters; After the slow cooling section is over, the strands are cooled to room temperature, and the cooling air temperature is 5-10°C. The invention optimizes the cooling process of PBAT spinning, that is, when the filaments are cooled to near the crystallization temperature, the method of slow cooling is adopted, and the temperature is set near the crystallization temperature of PBAT for heat preservation, and sufficient crystallization time is given to the PBAT to make the PBAT crystallize. Perfect, improve the crystallinity of PBAT, the improvement of crystallinity can avoid the phenomenon of thread sticking in the process of bundling and winding of PBAT fiber, and improve the quality of PBAT fiber.

The invention discloses a method for preparing aliphatic polyester composite material by modifying the surface of biomass fiber with alkyl ketene dimer, which comprises the following steps: (1) Preparation of AKD emulsion and its effect on the surface of biomass fiber raw material (2) aging treatment of surface-modified fibers; (3) compounding of surface-modified biomass fibers and aliphatic polyester matrix. Hydrophobic treatment of the surface weakens the interfiber hydrogen bonding, reduces agglomeration in the aliphatic polyester matrix, improves the interfacial strength of the composite material, and makes it have more excellent comprehensive properties, especially mechanical properties. The composite material product has a wide range of applications and can be used in household appliances, automobile industry, packaging, daily necessities and other fields. Moreover, the method has low cost and simple process, is conducive to popularization and application, and has great significance for improving the utilization level of biomass raw materials, alleviating the oil resource crisis and protecting the environment.

The invention relates to the technical field of ink, and in particular, relates to a degradable UV gravure embossed sand-feeling ink for a gold and silver cardboard material. The ink comprises the following components by the weight percentage: 15%-25% of epoxidized soybean oil acrylate, 10%-15% of acrylate, 15%-25% of 1,6-hexanediol diacrylate, 10%-20% of isobornyl acrylate, 2%-4% of a 184 photoinitiator, 3%-6% of a TPO photoinitiator, 8%-12% of an amine initiator, 3%-5% of sand finish powder, 5%-8% of wax powder, and 1%-3% of an auxiliary agent. The degradable UV gravure embossed sand-feeling ink for a gold and silver cardboard has no solvent and no toxic gas emissions when in use, is environmentally friendly, and has no pollution; the ink after curing has the advantages of strong pattern three-dimensional sense, good adhesion force and good fluidity, can meet the requirements of decorative inks, can be biodegraded after being discarded, meets new concepts of environmental protection, reduces environment pollution, and achieves the purpose of sustainable development.

One new kind of biodegradable material with low cost and high machining performance is mixture containing including 3-hydroxy butyrate homopolymer and copolymer of 3-hydroxy butyric acid and non-HB structure hydroxy fatty acid in the weight ratio of 1 / 9 to 9. The copolymer contains at least two random structural units I and II, with the structural unit I accounting for the molar ratio of 10-95 %. The plastic products made of the biodegradable material are also provided.