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35305results about How to "Wide variety of sources" patented technology

Composite natural polymer gel material

The invention discloses a composite natural polymer gel material with a cross-linking agent. The material comprises hydrogel, organogel, aerogel and bioplastics and mainly overcomes the problem of low mechanical strength of conventional natural polymer gel materials. According to the invention, a certain amount of the cross-linking agent is added into a natural polymer water-based solution or dispersion liquid, then stirring is carried out, the obtained mixture is placed in a non-solvent for physical cross-linking, and then washing is carried out so as to obtain composite natural polymer hydrogel; water in the composite natural polymer hydrogel is replaced with an organic solution so as to prepare composite natural polymer organogel; the composite natural polymer hydrogel or organogel is dried so as to prepare composite natural polymer aerogel; the composite natural polymer aerogel is subjected to hydrophobic treatment so as to obtain hydrophobic aerogel; the composite natural polymer aerogel is subjected to heat treatment so as to obtain carbon aerogel; and one or more selected from the above-mentioned gel materials are subjected to high-temperature pressing so as to prepare composite natural polymer bioplastics. The composite natural polymer gel material prepared in the invention has the advantages of excellent mechanical properties, a high specific surface area, high elongation at break, etc., and can be easily processed into molded products of a plurality of forms.
Owner:浙江绍兴万德福生物技术有限公司 +1

Iron-based bio-char material, preparation process thereof, and application thereof in soil pollution treatment

The invention relates to the technical field of soil heavy metal remediation, and specifically discloses a method for preparing an iron-based bio-char material, a prepared iron-based bio-char material, and a method for applying the iron-based bio-char material in treating soil heavy metal pollution. According to the material, biomass is adopted as a raw material; a high-temperature carbonization method is adopted; during the bio-char preparation process, an iron-containing compound is added, such that iron is doped according to a certain ratio, and the iron-based bio-char material with special structure and function is formed. The material has the advantages of simple preparation process, low production cost, and short production period. The obtained iron-based bio-char material has a unique effect in repairing arsenic-cadmium composite polluted soil. With the material, bio-availability of arsenic and cadmium in soil can be effectively reduced, arsenic and cadmium contents in agricultural products planted in the arsenic-cadmium composite polluted soil can be greatly reduced, and no toxic or side effect is caused on crops. The material is safe to apply, and can be used in a large scale in treatment of arsenic-cadmium composite polluted soil.
Owner:GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI

Preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and preparation method thereof

The invention discloses a preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and a preparation method thereof. The preformed material includes the following components by weight percent: 65 to 95 percent of silicate cement, 0.01 to 3 percent of high-range water-reducing agent, 0 to 1 percent of stabilizing agent, 0.05 to 5 percent of retarding agent, 1 to 20 percent of expanding agent, 0.2 to 2 percent of corrosion inhibitor, 0.01 to 1 percent of air entraining agent and 0 to 30 percent of mineral materials, wherein by uniformly and proportionally mixing the silicate cement, the high-range water-reducing agent, the stabilizing agent, the retarding agent, the expanding agent, the corrosion inhibitor, the air entraining agent and the mineral materials, the post-tensioned prestressing pipeline vacuum grouting or mudjacking preformed material can be obtained. After being uniformly mixed and stirred with water with neutral pH value according to the water cement ratio ranging from 0.24 to 0.32, the preformed material can be used, the obtained grouting material has the advantages of low water cement ratio, favorable flowability, no water bleeding and delamination, and favorable pumpability; meanwhile, the preparation method of the preformed material is simple and the raw material sources of the preformed material are wide.
Owner:HUBEI CHIDGE TECH

Scratch-resistance French white filled polypropylene composition and its preparing method

This invention refers to a kind of component of nick resistant talcum-powder-filling polypropylene, is characterized with strengthened toughness through latex and is composed of the following materials in amounts of weight: between 50 and 80 of polypropylene, between 5 and 35 of filler, between 5 and 25 of latex, between 0.5 and 5 of high molecular silicone elastomer, between 0.05 and 0.5 of nucleater, between 0.1 and 1.0 of stabilizer, between 0.2 and 1.5 of talcum powder surface passiation agent, between 0.05 and 1.0 of processing agent and between 0.3 and 2.0 of toner. The manufacturing method is to weigh the materials in amounts of weight, to mix polypropylene, filler, latex, high molecular silicone elastomer, nucleater, stabilizer, talcum powder surface passiation agent, processing agent and toner in homo mixer, then put them into double-screwed extruder for melting and extruding. After cooling, drying and pelleting, we can get the turnoff. The invention improves the nick resistance of polypropylene, ultraviolet radiation endurance and thermal endurance and the toughness and rigidity of the material reach good balance. It can meet the requirements of the material of automobile limbs. It can demold at a relatively high temperature, improves the moulding efficiency greatly and reduces the processing cost.
Owner:SHANGHAI PRET COMPOSITES

Preparation method for high strength macro graphene conductive fiber

The invention discloses a preparation method for high strength macro graphene conductive fiber. According to the method, graphite is oxidized to obtain a graphene oxide; the graphene oxide is dispersed in water or a polar organic solvent to prepare a spinning liquid sol with the mass concentration of 1-20%; the spinning liquid sol is transferred to a spinning device; the spinning liquid is continuously extruded from a spinning head capillary at a uniform speed; the extruded spinning liquid enters a solidification liquid; the solidified primary fiber is collected by using a polytetrafluoroethylene roller; a drying treatment is performed to obtain the graphene oxide fiber; the graphene oxide fiber is subjected to chemical reduction to obtain the graphene fiber. According to the present invention, the spinning process is simple; the operation is performed at the room temperature; no strong corrosive reagent is used; the process has the characteristics of green environmental protection; the prepared graphene fiber has characteristics of good conductivity, excellent mechanical property and good toughness, can be woven into the pure graphene fiber cloth, can further be woven into various fabrics with other fibers, and can further be added to the polymer as the conduction enhancing additive and the like; the prepared graphene fiber can replace the carbon fiber to use in a plurality of fields.
Owner:杭州德烯科技集团有限公司

Nitrogen and phosphorus removal method by using pyrite as biochemical filling

The invention discloses a nitrogen and phosphorus removal method by using pyrite as biochemical filling, belonging to the field of simultaneous nitrogen and phosphorus removal of low-carbon and nitrogen ratio sewage. The basic principle is as follows: thiobacillus denitrificans is subject to autotrophic denitrification by using sulfur in pyrite as an energy source, and ferrous ions and iron ions generated in the process of denitrification are used to react with phosphate radical to form precipitation so as to remove phosphorus, thus integral nitrogen and phosphorus removal is realized. The method comprises three stages of the preparation of reactor filling, the starting of a reactor and the operation of the reactor, and has the advantages of high process efficiency, low operation cost and low sludge yield. The reactor of the invention also has the advantages of small floor space and convenient operation. The reactor can work continuously, can be used singly in waste water processing, and also can be used as a processing unit of a processing system.
Owner:NANJING UNIV

Plant polysaccharide cigarette filter tip and preparation method thereof

The invention discloses a plant polysaccharide cigarette filter tip and a preparation method thereof. Plant polysaccharide, starch, adsorbent, plasticizer, emulsifier, waterproofing agent and plant protein are blended according to a certain proportion, so that the filter tip is prepared. The preparation method includes the following steps: (a) the starch, water and the plasticizer are blended and stirred, so that modified starch solution is obtained; (b) the plant polysaccharide and the modified starch solution are blended; (c) under certain conditions, the emulsifier, the waterproofing agent and the adsorbent are added into the mixture of the plant polysaccharide and the modified starch solution, and after stirring, the mixture is injected into a long cylindrical mold made of anti-freezing, heat-proofing material and molded; (d) the semifinished product is placed into a freezing environment and frozen, i.e. prefreezing; (e) the semifinished product in step d is placed into a freeze dryer and freeze-dried; (f) the porous composite body is taken out of the mold and deburred, and thereby a filter tip stick is obtained. Material resources are rich, the cost is low, and the three wastes cannot be produced. The performance is good, the filter tip can reduce the nicotine content by 40.2 to 84.1 percent, the tar by 26 to 72.1 percent and the nicotinamide by 20 to 39.2 percent, and after use, waste can be biodegraded.
Owner:WUHAN LICHENG BIOTECH +1

Controlled release fertilizer coated by vegetable oil based polyurethane and preparation method thereof

The invention discloses a controlled release fertilizer coated by vegetable oil based polyurethane and a preparation method thereof. The preparation method of the controlled release fertilizer coated by vegetable oil based polyurethane comprises the following steps of: 1) preheating the granular fertilizer; 2) heating plant oil polyhydric alcohol containing 2-6 hydroxys and isocyanate containing at least two isocyanate groups, and uniformly mixing the ingredients to form a vegetable oil based polyurethane coating liquid; 3) spray coating the vegetable oil based polyurethane coating liquid on the surfaces of the preheated fertilizer granules, repeatedly spray coating the vegetable oil based polyurethane coating liquid for 2-10 times after the vegetable oil based polyurethane coating liquid solid is solidified to obtain the controlled release fertilizer coated by vegetable oil based polyurethane. According to the controlled release fertilizer coated by vegetable oil based polyurethane and the preparation method thereof provided by the invention, the adopted coating material is extensive in resource, cheap and liable to obtain, non-toxic, harmless, simple in production process and good in controlled release effect of fertilizer.
Owner:上海永通生态工程股份有限公司

Method for preparing large-size high-quality graphene with controllable number of layers

The invention discloses a method for preparing large-size high-quality graphene with controllable number of layers, wherein graphite powder or flake graphite is mainly adopted as a raw material. The method specifically comprises the steps of intercalating the graphite raw material by virtue of an intercalating agent to initially weaken the intercalation interaction force and obtain different orders of graphite intercalation compounds (GICs); soaking the GICs in an appropriate expander, and then under the case that an auxiliary agent is added or not, enabling the intercalation materials to be quickly reacted with the expander to release a gases to obtain highly expanded wormlike graphene aggregate and further to cause the distances among graphene lamellar layers to be increased; and after certain processing, peeling, and then repeatedly centrifuging and dispersing to obtain a graphene dispersion with different numbers of layers. According to the method disclosed by the invention, the intercalation-expansion-peeling process is involved, raw materials are cheap, the reaction process is simple and easily controlled, and the number of layers of graphene is precisely controlled; the obtained graphene lamellar layers have the advantages of few defects, large size, high conductivity, high yield and the like, the large-scale industrial production is easily implemented, and the problems of high cost, low productivity, poor quality, small size, uncontrollable number of layers and the like in an existing graphene preparation technology are solved.
Owner:安徽百特新材料科技有限公司
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