220results about How to "Renewable" patented technology

The invention relates to a multifunctional nano composite material in a core-shell structure, specifically relates to a carbon quantum dot magnetic and fluorescent difunctional nano material and a preparation method thereof, and belongs to the field of preparation of materials. The carbon quantum dot magnetic and fluorescent difunctional nano material which takes magnetic particles Fe3O4 as a core, chitosan and polyanionic cellulose as a shell material and carbon quantum dots as a fluorescent material is obtained by a self-assembling method layer by layer. The preparation method comprises the following steps: after synthesizing a magnetic fluid nano Fe3O4, preparing carbon quantum dots; then, preparing Fe3O4@CS/CDs; finally, preparing the carbon quantum dot magnetic and fluorescent difunctional nano material through the self-assembling method layer by layer. The carbon quantum dot magnetic and fluorescent difunctional nano material is good in biocompatibility and stability and adjustable in magnetism and fluorescence intensity.

The invention relates to a multifunctional nano composite material of a core-shell structure and in particular relates to a carbon quantum dot magnetic fluorescent difunctional nano material and a preparation method thereof. Magnetic particle Fe3O is taken as a core, chitosan and polyanionic-based cellulose are taken as shell material, a carbon quantum dot is taken as a fluorescent material, and the carbon quantum dot magnetic fluorescent difunctional nano material is obtained by adopting a layer-by-layer self-assembly method; the carbon quantum dot is coated by adopting a natural polymer material, so that no free carbon quantum dot is formed, and stability is improved; magnetic property and fluorescence strength can be regulated and controlled by virtue of number of layers of the shell material and the addition amount of the carbon quantum dot; the obtained magnetic fluorescent difunctional nano material has a broad application prospect in the biological medicine fields of cell marking and absorption, bioimaging, medicine detection and disease diagnosis, medicine carrying and the like.

The invention discloses a preparation method based on an amphoteric cellulose composite material. Cellulose is used as a raw material to obtain amphoteric quaternary ammonium-sulfated cellulose, then the amphoteric quaternary ammonium-sulfated cellulose is used as a carrier of oxidized grapheme and chitosan, the amphoteric quaternary ammonium-sulfated cellulose, the oxidized grapheme and the chitosan can be powerfully combined under the actions of the covalent bond, the electrostatic attraction, the hydrogen bond and the like, and then is subjected to freeze-drying to obtain the amphoteric quaternary ammonium-sulfated cellulose, the oxidized grapheme and the chitosan ternary composited material. The composite material has the renewability, the degradability, green and environment-friendly effect and high-efficiency adsorbability, the condition is mild and easy to realize in the preparation process, and the cellulose can be reasonably and effectively utilized, therefore, the preparation method has good economic and social benefits.

The invention discloses an amphoteric-cellulose-based composite material and application thereof. Quaternary ammonium-sulfonic acid cellulose serves as a carrier, grapheme oxide and chitosan are loaded in a blending manner, binding force among the three is utilized, and a quaternary ammonium-sulfonic acid cellulose/ grapheme oxide/chitosan composite porous material is obtained through freeze drying. The quaternary ammonium-sulfonic acid cellulose/ grapheme oxide/chitosan composite porous material comprises, by weight, 5-8 parts of quaternary ammonium-sulfonic acid cellulose, 0.5-3 parts of grapheme oxide and 0.5-3 parts of chitosan, is safe, non-poisonous and good in biocompatibility and degradability, has an orderly three-dimensional porous structure, good mechanical strength and efficient adsorption capability, can be used for water absorption and oil removal and processing of heavy metal ion waste water and organic waste water, and hopefully serves as a filtering material such as an air purification material and a medical adsorption material for use.

The invention relates to a rhodotorula glutinis oil genetic engineering strain and a construction method and an application thereof. The construction method of the genetic engineering strain is mainly as follows: utilizing rDNA (recombinant deoxyribonucleic acid) of rhodotorula glutinis as a target sequence for homologous integration, using strong promoter genes PGK1 of saccharomyces cerevisiae and malate dehydrogenase genes ME of chaetomium cochloides to construct an expression vector to be introduced into rhodotorula glutinis, and enabling ME genes to obtain high-efficient expression in a rhodotorula glutinis body, wherein the content of lipid in a transformant is improved by 2.5 times in comparison with a wild strain. According to the construction method disclosed by the invention, key enzyme genes and a strong promoter for anabolism of the lipid are introduced on the basis that the anabolism of microbial oil is known, so that the lipid metabolism is regulated and controlled, and the yield of oil is improved. The genetic engineering strain can be applied to production of the microbial oil and development of functional oil related products, such as medicaments, health care products and the like.

The invention discloses a spray-free high-tenacity high-temperature-resistant nylon PA6T composite material .The composite material is mainly prepared from, by weight, 70-90 parts of high-temperature-resistant nylon PA6T, 1-5 parts of pigment master batch, 5-30 parts of flexibilizer, 1-5 parts of compatilizer, 0.3-1.2 parts of lubricant, 0.2-0.8 part of antioxidant, 0-1.2 parts of passivator and 0.1-1 part of a nucleating agent .The invention further discloses a preparing method of the composite material .The preparing method includes the steps of weighing all the raw materials, mixing, extruding, drafting, cooling, drying, pelletizing and the like .The composite material has the advantage of being free of spray, the process can be simplified greatly, and the composite material is more environmentally friendly.

Belonging to the chemical field of plasma synthesis, the invention relates to a method for direct preparation of polyols and higher alcohols from ethanol. The method is characterized by: choosing dielectric barrier discharge, corona discharge, pulsed corona discharge, glow discharge, radio frequency discharge, gliding arc discharge or microwave plasma and other discharge methods to perform selective activation to ethanol molecules, then setting the residence time of a reaction mixture in a reaction zone, the discharge reaction temperature, the discharge reaction pressure, and the mole ratio between a carrier gas and ethanol, conversing the selectively activated ethanol into target products. The method of the invention adopts ethanol as the raw material for preparing polyols and higher alcohols, while ethanol has various sources and renewability. The method provided in the invention belongs to a one-step synthesis technology, and has the advantages of no need for catalyst, no environmental pollution, as well as high selectivity.

The invention discloses a preparation method for a titanium alloy-hydroxyapatite salt biological ceramic porous material. The preparation method for the titanium alloy-hydroxyapatite salt biological ceramic porous material has the characteristics that the 3D printing technology is applied, and by means of the manner that the proportion value of hydroxyapatite salt powder to titanium alloy matrix powder of all fusion covering layers is dynamically adjusted, the titanium alloy-hydroxyapatite salt biological ceramic porous material with titanium alloy being a central layer and titanium alloy-hydroxyapatite salt being a transition layer is prepared. According to the preparation method for the titanium alloy-hydroxyapatite salt biological ceramic porous material, because the performance advantages of various materials are sufficiently utilized and the internal stress is further reduced, excellent mechanical and biological properties are exhibited, therefore, the preparation method for the titanium alloy-hydroxyapatite salt biological ceramic porous material is suitable for the field of bone tissue replacing or implant repairing.

The invention discloses a desktop wood-plastic 3D printer with a grinding function, and relates to a desktop wood-plastic 3D printer with wood addition and subtraction. In order to solve the existing 3D printing layer-by-layer manufacturing form, the present invention has the problem that the shape accuracy, size accuracy and surface quality of parts are limited by the double limitation of single-layer printing thickness and plane printing accuracy. The invention includes a rectangular frame (1), which also includes a material subtraction component, a material addition component, and a work platform for adding and subtracting materials. Mounted on a rectangular frame (1). The present invention uses wood-plastic materials as raw materials for manufacturing, and realizes the layer-by-layer stacking of wood-plastic materials to carry out additive manufacturing technology; while the grinding process is a kind of cutting tool with the grinding wheel and the abrasive grains of the grinding wheel as the cutting blade, so as to achieve the required Dimensional shape accuracy, surface roughness requirements. The invention is used for wood-plastic extrusion printing.

The invention discloses an overlapped prefabricated reinforced concrete structural system and a construction method thereof. The structural system comprises a frame structural system which is composed by connecting a foundation, a structural column, a structural beam and a floor. The structural column adopts an overlapped tubular column or an overlapped core tubular column, the structural beam adopts a prefabricated overlapped reinforced concrete beam or a prefabricated variable-stiffness mixed composite beam, and a shearing wall board can be additionally arranged and is a reinforcement-enhanced reinforced concrete prefabricated shearing wall, or a strip-type steel plate reinforced concrete prefabricated shearing wall or a bolt-free integral-type steel plate reinforced concrete prefabricated shearing wall. According to the structural system, the bearing capacity is high, the cross section is small, the effective net area is increased, the fire-proof property is good, the structural shock-resisting property is greatly promoted, the construction period is shortened, the construction quality is improved, and industrialized construction is facilitated.

A preparation method of a biocompatible silk fibroin film for a flexible magnetoelectric device substrate comprises the following steps: 1, preparing a pure aqueous silk fibroin solution from naturalsilk, used as a substrate making material; 2, cleaning a rigid substrate; 3, coating the clean rigid substrate with the aqueous silk fibroin solution; 4, carrying out natural air drying, convection air drying or drying on the solution-coated rigid substrate; and 5, stripping the silk fibroin film from the surface of the rigid substrate after the water is completely evaporated in order to form theindependently supported biocompatible flexible silk fibroin film. The method using the natural silk as the raw material for preparing the flexible magnetoelectric device substrate has a simple and rapid preparation process and a high success rate, and can provide a substrate for health monitoring flexible magnetoelectric devices having great application values.

The invention relates to a furnace use fuel composition, which comprises (by weight percent), trench oil 30-50%, waste mineral oil 15-33%, waste ethanol and / or waste methanol 10-28%, ferrocene 0.01-0.03%, addition agent 5-10%, wherein the addition agent is selected from butanone, lower alcohol or their composition. The invention can provide an industrial or domestic furnace fuel with uniform mixing, ideal thickness, high calorific value, and lower contamination.

The invention discloses a Manioca biological fuel mixture which is prepared by mixing Manioca oil with different types of diesel oil, wherein the fuel mixture is charged by alcohols and surface-active agents, each of the physical and chemical indexes of the mixture reaches or exceeds that of 0# diesel oil.

The invention belongs to the technical field of filter materials and discloses a composite structure filter felt and its preparation method and application. The composite structure filter felt is composed of a filtering function layer and protective layers coating the upper and lower surfaces of the filtering functional layer. The filtering function layer is prepared from a regenerated fiber layer containing 3D crimped structural fibers and an electrospinning nano-fiber layer through compounding. The composite structure filter felt has a fluffy filtering material skeleton structure of renewable micrometer fibers containing 3D crimped structural fibers and utilizes secondary electrospinning nanofibers attached to the micrometer fibers so that a high fiber specific surface area is obtained. The filter felt has the advantages of high filtration efficiency, low resistance and environmental friendliness.

The method provides a method of preparing small molecule polyol such as glycol and propylene glycol from Cn(H2O)m compounds such as straw, paper pulp, waste paper, cellulose, starch, semi-cellulose, cane sugar, glucose, fructose, fructosan, xylose, and soluble xylo oligosaccharide under the near-critical or supercritical conditions. In the method, carbohydrate is taken as the raw material, the 8, 9 and 10 groups of transition metals, namely iron, cobalt, nickel, ruthenium, rhodium, palladium, iridium, and platinum, are taken as the catalytic active components, one-step catalytic conversion process is carried out under the near-critical and supercritical water conditions: temperature of 300 to 450 DEG C, hydrogen pressure of 1 to 10 MPa, and total pressure of 10 to 35 MPa, and high efficient, high selective, and high yield preparation of small molecule polyol such as glycol and propylene glycol is achieved. The reaction provided by the invention has the prominent advantages of recyclable raw material and high atom economy, and the preparation of the catalyst has the advantages of simple and easy process and low cost. Furthermore, compared to other technologies, which prepare polyol from biomass, the method has the advantages of simple reaction process, high space time yield, and convenience for industrial production.

In reaction for preparing low-carbon alcohol through catalytic conversion of a carbohydrate compound, a tungsten-based catalyst may be wholly or partly dissolved in a reaction substrate, and is difficult to recover, and the cost of the catalyst is increased. The invention provides a method of recovering the tungsten-based catalyst from a complex reaction substrate. The method is characterized in that the complex reaction substrate is a rectification residual product after the catalytic conversion of the carbohydrate compound, after reaction products are subjected to rectification for separation of glycol and propylene glycol, a kettle bottom residual product is obtained, a boiling point of the kettle bottom residual product is greater than or equal to 200 degrees, and the kettle bottom residual product contains tungsten salt; and through adding an organic solvent to the kettle bottom residual product, the tungsten salt is dissolved out and recovered, fusel having a high boiling point is obtained, and a mass recovery rate of the tungsten salt is greater than or equal to 90%. According to the method, a catalyst recovery process is simple, the catalyst recovery efficiency is high, and the cyclic activity of the tungsten-based catalyst is excellent. In addition, the overall process facilitates operation and industrialized production.

The invention relates to a method for purifying cisatracuriumbesylate. Specifically, the purification method is by using macroporous resin as a filler, eluting impurities by an eluent, then eluting a sample, and collecting an eluate. The samples elution employs a gradient elution method, can effectively separate cis-csi isomers and cis-trans isomer in the sample; at the same time, the method is conducive to the removal of residual methyl benzenesulfonate in the sample, and can effectively obtain the cisatracuriumbesylate product, significantly reduce the residual amount of toxic solvent in the cisatracuriumbesylate product, and significantly improve the medication safety and also reduce the cost of production.