322results about How to "Reduce hydrogen bonding" patented technology

A fiber-reinforced building material in one embodiment incorporates cellulose fibers that are chemically treated with a dispersant to impart improved dispersibility to the fibers. The fibers are treated with a dispersant which deactivates the hydroxyl sites of the fiber surfaces and in some cases, making the fiber surface more hydrophobic. The dispersant inhibits the hydroxyl groups on the cellulose fiber surface from bonding with hydroxyl groups of other fibers and from bonding with hydroxyl groups of the same fiber, thereby significantly reducing inter-fiber and intra-fiber hydrogen bonding. The treated fibers can be readily dispersed and uniformly distributed throughout a mixture without re-clustering or reclumping once the mechanical mixing action stops. The chemically treated fibers with improved dispersibility improve the fiber distribution and reinforcing efficiency, which in turn improves key physical and mechanical properties of the material such as the modulus of rupture, z-direction tensile strength, and toughness, and surface finishes. With improved fiber reinforcing efficiency, less dosage of fiber is needed to achieve the required physical and mechanical properties.

The invention discloses a biology base polymer aerogel oil absorption material. The oil absorption material is prepared by the following steps: at first, crosslinking biology base polymers by a crosslinking agent, to obtain a precursor liquid, then freeze-drying the precursor liquid to obtain aerogel, and finally grafting silane onto the aerogel surface to obtain the hydrophobic biology base polymer aerogel oil absorption material. The density of the oil absorption material is 3.8 to 23.1 kg/m3. The water contact angle is at least 117.8 degrees. The adsorption capacities on gasoline, paraffin oil, chloroform, and crude oil are 30.5-109.0 g/g, 33.2-131.2 g/g, 58.2-163.0 g/g, and 24.7-95.8 g/g. After 50 times of gasoline adsorption-extrusion circulation, the retention rate of adsorption capacity is 43 to 99%. The disclosed aerogel oil absorption material has the advantages of large oil absorption capacity and high oil absorption efficiency. Moreover, the oil absorption material can be repeatedly used by simply extruding the oil absorption material, while a high retention rate of adsorption capacity can be maintained. At the same time, the raw material sources are wide, the raw materials are cheap and easily available, the preparation is simple, the technology is matured, the method is environment-friendly, and the requirements of sustainable development can be met.

The invention discloses a modified polylactic acid fiber and a preparation method thereof. The fiber comprises the following components by mass percentage: 70-98% of polylactic acid, 1-15% of resin, and 1-15% of a modifier. The weight-average molecular weight of polylactic acid is 7-200 ten thousands. The resin is polytrimethylene terephthalate or/and polyhydroxyalkanoate. Polyhydroxyalkanoate is one or two of polyhydroxybutyrate, polyhydroxybutyrate-hydroxyvalerate, 3-hydroxybutyrate and 3-hydroxyhexanoate copolyester, polyhydroxyhexanoate and polyhydroxyoctoate, the weight average molecular weight of polyhydroxyalkanoate is 1-50 ten thousands, and the melt index is 20-50. The modifier is one or two of polydiethylene adipate glycol ester ether, diisononyl phthalate, (2-ethylhexyl)-difenylfosfat, cresyl diphenyl phosphate, tri(2-chloroethyl)phosphate and dioctyl adipate. The fiber has strength of greater than or equal to 1.5cN/dtex and elongation at break of greater than or equal to 40%.

The invention discloses a method for preparing a micro-nano cellulose with ultra-low crystallinity, which comprises the following steps of: allowing a micro-nano cellulose crystal with higher crystallinity to be fully dissolved in a dissolution system of the cellulose and reproducing; changing the cellulose into a loose cellulose II structure; and through mechanical treatment, further destructing a crystalline structure of the cellulose to obtain the micro-nano cellulose with ultra-low crystallinity. Amorphous cellulose intermolecular and intramolecular hydrogen bonding interaction is weakened, the majority of hydroxyl groups on a molecular chain are exposed to enhance the degree of availability and reaction activity of the cellulose, and the water retention value is also increased. Accordingly, the cellulose prepared by the method provided by the invention has ultra-low crystallinity, and extremely high degree of availability and reaction activity, overcomes the defects that the cellulose prepared by the traditional method has high crystallinity and low degree of availability and reaction activity, and can be widely used in application fields of various celluloses.

The invention discloses a liquid thickening agent system including an organic solvent, a plant gum thickener, an organic thickener, an emulsifier and water. According to the thickening agent system disclosed by the invention, the thickening agent system is easy to prepare and has a certain salt resistance; the thickening agent system is fast to swell when used for being mixed with water to prepare a fracturing fluid, the requirement on preparing water is low, and even if sea water (containing salt) is used, the swelling effect of the thickening agent is also not affected.

The invention discloses an environment-friendly high-strength water-resisting and mildew-resisting adhesive for a plywood and a preparation method of the environment-friendly high-strength water-resisting and mildew-resisting adhesive. The environment-friendly high-strength water-resisting and mildew-resisting adhesive is prepared from the following raw materials including polyvinyl alcohol, cassava starch, dibutyl phthalate, sodium pyrosulfite, tannic acid, jade powder, calcium silicate hydrate, asbestos powder, p-hydroxybenzoic acid hydrazide, diammonium hydrogen phosphate, hydroquinone, sodium diethylhexyl sulfosuccinate, triethyltin chloride, phenyl mercury oleate, borax and the like. The polyvinyl alcohol and the cassava starch are subjected to a cross-linking reaction so that crystallization degrees of the polyvinyl alcohol and the cassava starch are reduced and a new cross-linking structure is formed, and furthermore, the thermal stability of the adhesive is improved; the borax is added and the polyvinyl alcohol and the starch can be subjected to further cross linking, so that the cross-linking degree and the initial viscosity of the adhesive are improved, and furthermore, the water resistance and the bonding force of the adhesive can be improved; the triethyltin chloride, the phenyl mercury oleate, the p-hydroxybenzoic acid hydrazide and the like are added so that the mildew-resisting capability of the plywood can be improved.

The invention relates to a method for preparing a cellulose nano-grade filament film by using recovered waste paper. The method comprises the steps of chemical pretreatment, mechanical separation, and film preparation. The method has the advantages that: the film is prepared through a combination of acid-alkali pretreatment and wood powder grinding; lignin in the wood powder is removed mainly by using sodium chlorite in an acidic condition; hemicellulose in the wood powder is removed by using dilute potassium hydroxide, and the rest is substantially cellulose; and the cellulose is subjected to a fiber-opening process by using dilute hydrochloric acid. With the fiber-opening process, hydrogen bonding interactions in the filaments are reduced, such that biomass cellulose nano-grade filaments with high length-diameter ratios are obtained. Minerals in the fibers are removed through hydrochloric acid treatment, and alkali-insoluble hemicellulose in purified cellulose is affected, such that an effect of cellulose fiber purification is achieved. The chemical components are detected through Fourier transform infrared. The grinding treatment is simple and easy to operate, such that large-scale production can be carried out. An elastic modulus is 2901.14MPa, and a tensile strength is 63.26MPa.

The invention discloses a method for preparing an aluminosilicate nanotube by using a kaolinite raw material. The method comprises the following steps of: preparing a kaolinite-dimethyl sulfoxide compound; preparing a kaolinite-methanol compound; dissolving a cationic surfactant into methanol; adding into the kaolinite-methanol compound obtained in the step 2 for preparing the aluminosilicate nanotube, and the like. The method has the advantages and positive effects that: an aluminosilicate nanotube material with high purity and a uniform structure and shape is prepared, the material has low cost, simple flow, low pollution and low energy consumption, and is easy for popularizing and applying.

The invention relates to a preparation method of a reed-based biochar adsorption material. The preparation method is technically characterized by comprising the following steps of cleaning the reed stalk, drying and crushing; soaking the crushed reed stalk into a KOH (potassium hydroxide) solution to activate, and drying; putting the dried crushed reed stalk into an atmosphere furnace, and performing oxygen-free high-temperature cracking under the nitrogen or inert gas protection atmosphere; after high-temperature cracking treatment, cooling to room temperature, and cleaning the cracked material to be neutral by an acid solution, so as to prepare the reed-based biochar adsorption material. The preparation method has the advantages that the problems of pollution to environment and waste ofresources due to irresponsible disposal of the wetland plant wastes are solved; compared with the prior art, the specific surface area is large, the pollutant adsorption ability is strong, the environment-friendly value is greatly increased, and the resource utilization of the wastes is realized.

The invention relates to the technical field of paper for daily use, and in particular relates to a softening technology of facial tissue and the ultra-soft facial tissue prepared by the softening technology. The softening technology comprises the step of spraying a softening agent onto raw paper in the rewinding process of the raw paper, wherein the softening agent is prepared from the following raw materials in parts by weight: 20-30 parts of a non-ionic surface active agent, 10-20 parts of polyol, 10-20 parts of sodium polyacrylate, 10-20 parts of sodium alginate, 5-15 parts of diisocyanate, 5-15 parts of pilylysine, 5-15 parts of hyaluronic acid, 5-10 parts of dialkyl dimethyl ammonium salt, 5-10 parts of sulphosuccinic acid ester, 5-10 parts of tetrabutyl ammonium hydrogen sulfate, 1-5 parts of sodium stearate, 1-5 parts of sodium hydrogen sulfate, 1-5 parts of talcum powder, 1-5 parts of starch and 60-100 parts of water. According to the softening technology, the facial tissue has good softness as well as dryness and wet strength; the softening technology is simple, the operation and the control are convenient, the quality is stable, the production efficiency is high, energy-saving and environment-friendly effects are achieved.

The invention discloses preparation of cellulose carbamate and a low-temperature dissolution spinning method of the cellulose carbamate. The method comprises the following steps: adding cellulose into a sodium hydroxide solution, stirring uniformly, immersing, taking out the cellulose, washing with water to a neutral state to obtain alkalified cellulose, adding urea, stirring uniformly, putting in a drying oven, heating, reacting and drying to obtain the cellulose carbamate; pulverizing the cellulose carbamate into powder, adding the powder into a mixing kettle, adding double solvents of sodium hydroxide, thiocarbamide and deionized water, and stirring uniformly; and carrying out extrusion, deaeration and filtration on the raw material in the mixing kettle, spraying by spinneret orifices of a spinneret, sequentially sending into a first coagulation bath and a second coagulation bath to obtain a solid, washing with water in a water tank, and carrying out stretching and winding by a spinning component to obtain the cellulose carbamate fiber. The method is suitable for preparing the cellulose carbamate by an industrialized large-scale production process route, and has important meanings for implementing low-temperature dissolution spinning engineering and industrialized production of cellulose.

The invention relates to a method for preparing a carbon nano tube modified bipolar membrane with anion groups. The method comprises the following steps of: preparing a sodium carboxymethylcellulose (CMC) aqueous solution or a sodium alginate (SA) aqueous solution by using sodium carboxymethylcellulose or sodium alginate, adding a carbon nano tube with the anion groups, stirring and defoaming under reduced pressure to obtain viscous membrane liquid; casting the viscous membrane liquid in a smooth culture dish to prepare a cation exchange membrane; stirring and dissolving chitosan in 1 to 10 mass percent of acetic acid aqueous solution to prepare 1 to 10 mass percent of chitosan acetic acid aqueous solution, dripping 2.5 volume percent of glutaraldehyde solution slowly with stirring, and defoaming under the reduced pressure to obtain a chitosan (CS) anion membrane liquid; and forming a membrane of the CS anion membrane liquid, fixing the membrane to a prepared cation membrane layer, and airing at room temperature to obtain the bipolar membrane. Due to the adoption of the carbon nano tube modified cation membrane layer with the anion groups, the bipolar membrane has the characteristics of high water dissociation efficiency, small membrane impedance, low tank voltage, high compatibility of two membrane layers and the like.

The invention discloses a method for preparing a heavy oil viscosity reduction agent through a hydrophobic modification carbon nanometer pipe. The method belongs to the technical field of heavy oil viscosity reduction agent preparation and comprises the steps of using a coupling agent for carrying out surface treatment on the carbon nanometer pipe; then adopting methyl methacrylate, octadecyl acrylate and styrene as raw materials for preparing to obtain an encapsulated liquid; coating the surface of the carbon nanometer pipe with the encapsulated liquid, and drying to obtain the hydrophobic modification carbon nanometer pipe; finally mixing the hydrophobic modification carbon nanometer pipe, a surface active agent and solvent oil to obtain the heavy oil viscosity reduction agent. When the heavy oil viscosity reduction agent prepared through the hydrophobic modification carbon nanometer pipe is added into the heavy oil, a polar basal body can be introduced, so that hydrogen-bond interaction between colloid and asphaltene in the heavy oil can be reduced, the aims of reducing the heavy oil viscosity and improving the crude oil mobility can be achieved, the usable range is wide, a better viscosity reduction effect can be realized on different oil products, and a viscosity reduction effect is durable and effective.

The invention belongs to the field of transfer printed paper and particularly relates to composite membrane quick-drying type dye-sublimation transfer printing digital paper which comprises base material paper, a hydrophobic layer coated on the surface of the base material paper and an ink absorption layer coated on the surface of the hydrophobic layer, wherein a surface layer is coated on the upper surface of the ink absorption layer. The ink absorption layer is made of positive ion polyacrylamide cellulose interpenetrating polymer network resin. The surface layer is one or a combination of two of polyvinyl alcohol-vinyl acetate copolymer or polyvinyl butyral or polyvinyl alcohol. The hydrophobic layer is made of organosilicone modified acrylic resin. The composite membrane quick-drying type dye-sublimation transfer printing digital paper is provided with the surface layer which is one or a combination of two of polyvinyl alcohol-vinyl acetate copolymer or polyvinyl butyral or polyvinyl alcohol and can transfer a strong water permeation capability to the ink absorption layer on the condition of normal temperature. The number of intermolecular hydrogen bonds is reduced on the condition of high temperature, the surface layer can provide a large gap, dye molecules quickly and sufficiently sublimate in transfer printing digital paper coating materials, the transfer printing effect is ideal, and the composite membrane quick-drying dye-sublimation transfer printing digital paper has a wide application prospect.

The invention relates to the field of high polymer materials, and discloses a preparation method of high-strength TPS starch for degradable materials. The preparation method comprises the following steps: firstly, by utilizing a wet modified starch production process, adding a bio-enzyme preparation under the conditions of controlling the temperature and pH value, then controlling the temperature of obtained slurry, adding an inhibitor, carrying out cross-linking agent and esterification treatment to obtain modified starch, mixing and adding a starch matrix reinforcement material into powder in a dry method for treatment, adding a proper amount of glycerol and a modifier, extruding by a twin-screw extruder, air-cooling, slitting and granulating to obtain a thermoplastic TPS starch granular material with good strength. Compared with common starch, the thermoplastic TPS starch particle material has the advantage that the mechanical property can be improved by adding the thermoplastic TPS starch particle material into a degradable material.

The invention relates to a mixed product comprising beta-glucan, which is prepared by the following raw materials in ratio by weight: 7.5-80% of beta-glucan, 6-20% of cocoa butter, 0-30% of supermicro carrot powder, 0-30% of supermicro highland barley, and 0-40% of erythritol. Meanwhile, the invention further discloses a preparation method of the product. In the mixed product, beta-glucan can be quickly dissolved in daily drinking water. The mixed product has a certain healthcare effect, is convenient to have and good in taste, and can meet the recommended dose of beta-glucan to reach the health keeping effect.

The invention relates to a wear-resistant high-impact-resistance nylon composite material which comprises the following components in parts by weight: 20-80 parts of nylon resin, 10-50 parts of fiber material, 10-40 parts of anti-wear agents, 0.1-2 parts of surface treating agent perfluoropolyether, 0.1-1.0 part of lubricant and 0.1-0.6 part of antioxidant. The preparation method comprises the following steps: uniformly mixing different types of anti-wear agents at medium speed; heating to 90-100 DEG C, adding the perfluoropolyether, and uniformly mixing at high speed; adding the nylon resin, lubricant and antioxidant, and continuing mixing uniformly; and carrying out melt blending extrusion, drawing, cooling, and granulation on the obtained mixture and fiber material through a double screw extruder, thereby obtaining the wear-resistant high-impact-resistance nylon composite material. The wear-resistant high-impact-resistance nylon composite material has the advantages of low friction factor, favorable wear resistance, high mechanical strength, favorable heat resistance, excellent toughness, excellent impact resistance, low mold shrinkage rate, favorable dimensional stability, favorable flowability and high processability.

Gypsum board having improved performance is obtained by controlling the distribution of starch in the gypsum core of the board and the gelling temperature of the starch. Starch migration in the board is controlled by the degree of acid-modification, to adjust the starch viscosity profile. The starch gelling temperature is controlled by chemical modification of the starch —OH groups.

The invention discloses a method for preparing high-quality bio-oil based on microwave activation and pyrolysis gas recycling. The method includes: based on obvious differences of main chemical component structure of biomass and unique functions of the microwave activation, firstly subjecting biomass raw materials to microwave activation pretreatment on a microwave pyrolysis reactor, selectively decomposing hemicellulose components in the biomass raw materials to reduce formation of moisture and carbonyl compound during a quick pyrolysis stage, activate cellulose components and improve conversion efficiency of the cellulose at the quick pyrolysis stage, subjecting the pretreated products to quick pyrolysis reaction in a fluidized bed, changing composition of pyrolysis products by recycling pyrolysis gas to provide reactive atmosphere, further reducing formation of the carbonyl compound during the quick pyrolysis process, and simultaneously subjecting pyrolysis steam to in situ filtering for removal of solid particles in the pyrolysis steam. The finally obtained bio-oil is lower in content of water, the carbonyl compound and the solid particles, good in storage stability and high in heat value.