162results about How to "Reduce surface polarity" patented technology

The invention provides a production method of a stable enhanced type solid wood profile improved by a wood carbonization and acetylation process, which belongs woodwork production technique. The production method comprises the following steps of: a, drying treatment, wherein the wood moisture content is reduced to be as low as 5.0 to 8.0 percent, the moisture content deviation in the wood thickness is less than 2.0 percent, and the wood internal residual stress is less than 2.0 percent; b, carbonizing treatment; c, acetylation treatment; and d, equalization treatment. The invention also discloses a stable enhanced type solid wood profile prepared by the production method. The solid wood profile prepared by the method is stable, has high corrosion resistance and weathering resistance, high output, long product service life and wide utilization ways, is favorable for realizing flow line production, and is convenient for industrialization.

The invention discloses a polybutadiene aqueous polyurethane and a preparation method of relative modified emulsion, which is characterized by reacting low polymer polyatomic alcohol and hydroxy-terminated butadiene rubber and isocyanate, adding hydrophilic chain extender and catalyst to be reacted, cooling and emulsifying to obtain polybutadiene aqueous polyurethane, mixing polybutadiene aqueous polyurethane, emulsifier, water and inducer uniformly, adding ethenyl monomer to carry out emulsion polymerization to obtain polybutadiene aqueous polyurethane modified emulsion. The invention uses hydroxy-terminated butadiene rubber to synthesize aqueous polyurethane which can be modified by ethenyl to obtain environment-friendly, stable and low temperature resistant aqueous resin with better mechanical property. The resin can be used in weaving, leather processing, paint and adhesive or the like.

The invention discloses a preparation method of nano-SiO2/cellulose composite separating membranes, which comprises the following steps: (1) dissolving cellulose in ionic liquid so as to form a membrane-casting solution; (2) preparing nano-SiO2; (3) carrying out modification on the nano-SiO2 by using a silane coupling agent gamma-(2, 3-epoxy propoxy) n-propyltrimethoxysilane; and (4) dispersing the modified nano-SiO2 in the membrane-casting solution obtained in sep (1) so as to obtain a mixed membrane-casting solution; and preparing the mixed membrane-casting solution into a membrane and drying the membrane so as to obtain a nano-SiO2/cellulose composite separating membrane. According to the invention, the dispersion and uniformity of nano-SiO2 particles in cellulose membranes are improved, and the mechanical strength and thermal stability of the cellulose membranes are further enhanced.

The invention relates to a functional master batch for an antisticking BOPA film and a production method thereof, and the master batch is used to prepare a biaxial stretching BOPA film. The functional master batch is prepared by the following raw materials by weight: 90-95% of PA; and 5-10% of cage-shaped polyhedral oligomeric silsesquioxane (POSS), wherein the typical molecular formula of POSS is R7R' (SiO1.5)8, and the beneficial effects are that POSS is used as an antisticking agent, and fine aggregated micro-areas are formed on the surface of the BOPA film by the nano effects of POSS, which increase the roughness of the film surface and decrease the friction coefficient between films; on the other hand, the addition of POSS can reduce the surface polarity of the BOPA film, increase the hydrophobicity of the BOPA film, decrease the penetration of water, and thus improve the barrier property of the BOPA film, and has no adverse effect on mechanical properties; additionally, no other additive is required to be added during the production process of the master batch.

A method for manufacturing bamboo redwood includes steps of selecting and cutting off materials, and radially splitting a bamboo barrel into 10 to 15 equal parts by a bamboo cutting machine; removing bamboo green parts, bamboo yellow parts and bamboo joints by a bamboo slicer, and preparing bamboo chips in certain sizes; grinding the bamboo chips, dividing the bamboo chips into threads, subjecting bamboo bundles to activating treatment: applying dyeing adhesive; dipping the bamboo bundles in dyeing phenolic resin adhesive solution for 3 minutes to 5 minutes in a pressurization manner, manually paving dyed adhesive-dipped bamboo bundles longitudinally to form a plate blank with a certain thickness; feeding the blank into a hot press to realize solidifying and forming, and preparing a reconstructed bamboo plate; and finally splitting and sawing the bamboo plate according to needs, and processing and using the bamboo plate. The dyeing phenolic resin adhesive solution contains from 20 to 40% of solid. The crystallinity of bamboo fibers and the specific surface areas of the bamboo bundles are reduced by means of pressurized activating treatment, accessibility and leaching resistance of dye are improved, imitated redwood bamboo furniture and decorative materials are manufactured, and additional values of reconstructed bamboo are increased by 40% at least under the condition that cost is seldom increased.

The invention relates to a degradable antifouling thermoplastic micro-airbag polymer elastomer material which is prepared from the following ingredients in percentage by weight: 88 to 98% of polymer raw material, 0.05 to 0.5% of nucleating agent, 0.4 to 2% of foaming agent and 0.1 to 10% of environment-friendly degradable organic perfluorosebacamidine material. A preparation method specifically comprises the steps: (1) feeding the polymer raw material, the nucleating agent and the environment-friendly degradable organic perfluorosebacamidine material from a feeding opening in the front end of a twin-screw extruder, feeding the foaming agent from a feeding opening in a middle section of the twin-screw extruder, hot melting and fully mixing all the raw materials, then sending into a static mixer to be further homogenized and then controlling pressure and quantitatively conveying by a melt pump; (2) sending hot melt sent out by the melt pump into an underwater pelletizing chamber to be pelletized, bringing out by technological water to be separated and screening and drying the particles to obtain a target product. Compared with the prior art, the degradable antifouling thermoplastic micro-airbag polymer elastomer material disclosed by the invention effectively achieves performance of antifouling, soiling-resistant, oil-resistant, contamination-resistant, attractive and good touch and is especially suitable for being applied to the fields of shoe materials, food package and the like.

The invention discloses a preparation method of composite adsorption microspheres of attapulgite cellulose. The method comprises the following steps: carrying out preprocessing and surface modification on attapulgite; preparing an ionic liquid cellulose solution; preparing the composite adsorption microspheres of the attapulgite cellulose. A preparation process is simple and convenient, adopted ionic liquid solvent is safe and nontoxic, and the prepared composite microspheres of the attapulgite cellulose are porous, have good dispersibility, biocompatibility and thermostability, have the advantages of high adsorption capability, large adsorption capacity, high removal efficiency and stable property on contaminants in water and can be easily recovered. The problems that the attapulgite is poor in adsorption capability and difficult to recover, a cellulose adsorbent is weak in mechanical strength and low in thermostability and the like are solved, meanwhile, the preparation method has the advantages of wide raw material resources, low cost, no secondary pollution and high practical value since the renewable resources including cellulose and the attapulgite are fully utilized, and can be used for the advanced treatment of contaminants in water, and the problems of energy crisis and environment pollution are solved.

The invention relates to the field of flame retardants, in particular to a modified aluminum hypophosphate flame retardant. A preparation method of the modified aluminum hypophosphate flame retardantcomprises the following steps: 1) adding aluminum hypophosphate and a dispersing agent in a reaction kettle and fully stirring, so that a solution is uniformly dispersed; 2) adding an adhesive and a modifying agent, raising the temperature, stirring and fully reacting to obtain a crude product; and 3) washing, filtering and drying the crude product to obtain the modified aluminum hypophosphate flame retardant. The modified aluminum hypophosphate flame retardant prepared by the preparation method provided by the invention can effectively solve the problems of low aluminum hypophosphate heat resistance, low compatibility, low dispersing performance and the like.

The invention discloses a preparation method for modified magnesium-aluminium hydrotalcite cable fillers and belongs to the technical field of preparation of cable fillers. The preparation method disclosed by the invention has the beneficial effects that firstly a tetraethoxysilane hydrolysis method is utilized for preparing silica sol, and since the silica sol contains silicon dioxide, oxygen inthe air can be effectively isolated from a base material to prevent contact; in addition, bismaleimide resin has heat resistance, and is easily cured on the polyethylene surface to form a triazine-ring structure, so that the compatibility of self-made magnesium-aluminium hydrotalcite with the base material is improved; meanwhile, the self-made magnesium-aluminium hydrotalcite particles are uniformly dispersed on the surface of the base material, so that the surface temperature of the base material is reduced and the flame-retardant effect is achieved; furthermore, in the heat-absorbing and decomposing process of the self-made magnesium-aluminium hydrotalcite, an alkali porous composite oxide is obtained, and can be combined with a carbonized product on the surface of the base material to form a protective film, so that the invasion of heat and oxygen can be effectively prevented, the flame retardance of the cable fillers can be further improved and the application prospect is wide.

The invention belongs to the technical field of high-polymer composite materials, and relates to a high-smoothness long-glass-fiber flame-retardant toughened polypropylene blend material and a preparation method thereof. The preparation method comprises the following steps: A. preparing the following components in parts by mass: 50-70 parts of polypropylene resin, 10-25 parts of synergic toughener master batch, 0.5-2.0 parts of chain extender, 2-5 parts of anti-floating fiber agent and 25-40 parts of main toughener master batch; B. blending: adding the components in the step A into an extruder, and blending to obtain a blend; and C. preparation: drawing the blend in the step B out of the head of an extruder, cooling, blow-drying, and granulating to obtain the high-smoothness long-glass-fiber flame-retardant toughened polypropylene blend material. The high-smoothness long-glass-fiber flame-retardant toughened polypropylene blend material is especially suitable for medium/high-end furniture supplies with higher requirements for product shape structure and appearance, cost, processibility and the like.

The invention provides active carbon and modification method as well as application thereof in processing water containing endocrine disrupters. The active carbon is arranged in a muffle furnace silica tube; under the room temperature, hydrogen is pumped into the muffle furnace at first for 0.5 to 1.5 hours; the hydrogen flowing speed is 40 to 60ml/minute; then under the protection of the same hydrogen flow, the temperature of the muffle furnace is raised to 500-900 DEG C by the speed of 10 DEG C/minute and then the temperature is maintained for 1 to 5 hours; after the temperature is reduced to 30 DEG C, hydrogen pumping is stopped; then the air is pumped continuously for one hour by the flux of 40 to 60ml/minute; then the active carbon is taken out, and is added into a container together with muriatic acid with a volume by volume concentration of 35 percent according to a weight percentage of 10 percent for boiling and reflowing for 2 to 4 h; then de-ionized water is used for leading the sample of the active carbon to be detected without chloridion to obtain the modified active carbon. The modified active carbon prepared by the invention is used as a sorbent in the treatment process and has larger absorption capacity and renewable performance than that of raw carbon, and can realize to completely remove the endocrine disrupters under lower carbon inputting amount.

The preparation process of nano calcium carbonate with non-polar surface includes dispersing nano calcium carbonate particles in hot polypropylene solution homogeneously via high speed stirring; adding reactive monomer as modifier and initiating in-situ reaction of the reactive monomer with initiator under heat action to form macromolecular compatibilizing agent; and crystallizing polypropylene on the surface of nano calcium carbonate by means of the heterogeneous nucleation action of nano calcium carbonate on polypropylene under high speed stirring and slowly lowering temperature to obtain nano calcium carbonate particles with non-polar surface coated with reactive monomer grafted polypropylene. The composite nanometer calcium carbonate/polypropylene material with the nano calcium carbonate of the present invention added has high calcium carbonate dispersivity, raised interface adhesion, etc.

The invention discloses anti-bacterial Lyocell fiber and a preparation method of the anti-bacterial Lyocell fiber. The anti-bacterial Lyocell fiber contains nano ZnO of which the mass content is 0.1 to 10 percent, wherein the fineness of the anti-bacterial Lyocell fiber is 1.1 to 4.3 dtex, the strength of the anti-bacterial Lyocell fiber is 1 to 5 cN/dtex, and the elongation at break of the anti-bacterial Lyocell fiber is 8 to 20 percent. A preparation method comprises the steps of uniformly mixing the nano ZnO subjected to surface modification treatment with NMMO (N-Methylmorpholine-N-Oixde) water solution of which the mass concentration is 70 to 87 percent to obtain ZnO-contained NMMO solution; then dissolving cellulose pulp; obtaining the anti-bacterial Lyocell fiber through spinning. The production technology is easy to control and is environment-friendly and pollution-free, industrial production is easy to realize, the nano ZnO is uniformly dispersed in a product, and the anti-bacterial performance of the product is good.

The invention discloses a method for preparing microcapsule-coated ammonium polyphosphate through in-situ polymerization molecular self-assembly. The method includes mixing formalin with melamine, increasing the temperature for condensation reaction after adjusting pH value of the mixture to 8-9, lowering the temperature after reaction, adding water and ammonium polyphosphate, stirring the mixture for 1-2 hours, adding cyanuric acid, increasing the temperature for in-situ polymerization reaction, coating the ammonium polyphosphate with a microcapsule, and performing filtering and drying after reaction to obtain the microcapsule-coated ammonium polyphosphate. The method has the advantages that the technological operation process is simple, ammonium polyphosphate coating rate is high, water solubility of the ammonium polyphosphate is reduced greatly, high dispersity and compatibility of the ammonium polyphosphate and polymer materials are achieved after coating, and flame retarding effect is remarkable; moreover, adhesion of the ammonium polyphosphate and resin to the inner wall of a reaction kettle is avoided during reaction, the reaction kettle is easy to clean, raw material utilization rate is increased and heat transfer efficiency of the reaction kettle is improved.

The invention discloses a modified bamboo charcoal fiber and rubber composite material, a preparation method therefor and an application of the modified bamboo charcoal fiber and rubber composite material. The composite material is prepared from the following ingredients in parts by weight: 100 parts of natural rubber, cis-butadiene rubber and styrene-butadiene rubber blended rubber, 15-35 parts of modified bamboo charcoal fibers, 1.2-3.3 parts of sulfur, 2.5-4 parts of zinc oxide, 0.9-1.3 parts of stearic acid and 1.2-2 parts of accelerant TMTD. The preparation method comprises the steps of using the natural rubber, cis-butadiene rubber and styrene-butadiene rubber blended rubber as a raw material, carrying out milling and plastifying on the modified bamboo charcoal fibers, processing aids and the blended rubber in mixing and milling procedures of the raw material, and carrying out procedures such as vulcanization, thereby preparing a modified bamboo charcoal fiber containing rubber composite material and products. The composite material and the products thereof, prepared by the method, can serve as a shoe sole material and can meet the requirements of novel shoe soles on light weight and low cost.

The invention relates to a heavy calcium carbonate modifier and a modification method thereof, wherein the heavy calcium carbonate modifier comprises at least one of fatty alcohol-polyoxyethylene ether, fatty acid polyoxyethylene ether and fatty alcohol alkyl phosphate. According to the modifier, adsorption and organic coating of part of polar groups on the surface of heavy calcium carbonate powder can be realized by utilizing various groups on the surface of the modifier, and the oil absorption value and the surface polarity of heavy calcium carbonate are remarkably reduced, so that the compatibility, the dispersity and the stability of the heavy calcium carbonate powder in an organic matrix are effectively improved.

The invention provides a functionalized boron nitride nanosheet/polypropylene composite material. The composite material comprises the following components in parts by weight: 50-70 parts of polypropylene, 5-20 parts of a functionalized boron nitride nanosheet, 5-15 parts of an alkali-free glass fiber yarn, 0-5 parts of grafted PP, 5-10 parts of barium sulfate, 0.1-0.5 part of an antioxidant and 0.1-1 part of other aids. The invention further provides a preparation method of the functionalized boron nitride nanosheet/polypropylene composite material. By virtue of pi-pi action stacked functionalization modification, the surface energy and the surface polarity of a BN nanosheet can be decreased, the dispersion degree of the BN nanosheet in a polypropylene resin matrix can be improved, and therefore, the agglomeration phenomenon is reduced; by decreasing two-phase interfacial tension, the wettability, the consistency and the bonding force between the BN nanosheet and polypropylene resin are improved, and therefore, the mechanical strength of the composite material is improved.

The present invention refers to bast fibers for plastics reinforcement and preparation method thereof. The bast fibers are composed of the following components by weight ratio; 100 pts.wt. chopped bast fibers, 0.1˜100 pts.wt. bast fiber treating agent, 1˜10 pts.wt. Functional Polyolefin wax, 0.1˜10 pts.wt. coupling agent and 0.1˜0.5 pts.wt. antioxidant. The method includes the steps of: firstly, cut chopped bast fibers and soak them in sodium hydroxide solution, agitate the mixture, after rinse and drying of water, soak the fibers in the aqueous solution of bast fiber treating agent, then dry them and obtain surface-treated chopped bast fibers; secondly, add in order the chopped fibers, the coupling agent, the Functional Polyolefin wax and the antioxidant to a preheated kneader, agitate the mixture and thus obtain bast fibers for plastics reinforcement. Chopped bast fibers according to the invention present good color, rigidity and heat resistance, as well as excellent compatibility with plastics, and can be used in the preparation of high-performance short-bast-fiber\plastic composites, as reinforcement in the plastic matrix.

The invention discloses a preparation method of a nano calcium carbonate modified composite emulsion for paper coating. The preparation method is characterized by comprising the following steps: adding absolute ethyl alcohol into a silane coupling agent; stirring uniformly; adjusting pH; performing magnetic stirring for hydrolysis to obtain modified liquid; adding absolute ethyl alcohol into nano calcium carbonate; performing ultrasonic dispersion; adding the modified liquid; heating for reacting to obtain surface-modified nano calcium carbonate; adding an ethanol aqueous solution into nano titanium dioxide powder; adding dispersing agents sodium hexametaphosphate and polyethylene glycol; grinding and performing ultrasonic dispersion to obtain nano titanium dioxide dispersion liquid; adding solvents absolute ethyl alcohol and acetic acid into chitosan; stirring for dissolution; uniformly mixing with the nano titanium dioxide dispersion liquid to obtain composite antibacterial liquid; uniformly mixing a styrene-acrylic emulsion, a polyvinyl acetate emulsion and a carboxymethylcellulose solution with the obtained materials to obtain a composite emulsion.