39results about How to "Energy-saving preparation method" patented technology

The invention discloses a method for preparing a vanadium dioxide film with thermal-reflectivity response. The method comprises the steps of pretreating glass fibers, dipping a precursor solution and sintering dipped glass fiber cloth. According to the method, the prepared vanadium dioxide film has good thermal-optical response performance and has sudden change of reflectivity at the temperature about 38 DEG C. The reflectivity is at a high level when the temperature is below 38 DEG C, the reflectivity is at a low level when the temperature is above 38 DEG C, and this property is reversible. The vanadium dioxide film can be applied to negative feedback adjustment on temperature in a greenhouse by using the thermal-reflectivity response of the vanadium dioxide film, so that the indoor temperature can be maintained to about 38 DEG C, and the development of plants in the greenhouse is facilitated. The method, which takes the glass fiber cloth as a carrier, for preparing the vanadium dioxide film with the thermal-reflectivity response, disclosed by the invention, has the advantages of energy saving, cheapness, safety, simplicity, stability, short consumed time and the like.

The invention discloses a method for preparing the polyol ester resin of terpene and rosin diene addition product based on rosin. The method disclosed by the invention comprises the following preparation steps of: (1) mixing turpentine with rosin, removing impurities by means of heating and stirring to dissolve, filtering, washing and the like, clarifying to separate water, then performing atmospheric distillation, distilling out water and a part of turpentine left in rosin by virtue of an oil-water azeotropic principle, so as to obtain a pure rosin liquid, analysing the contents of turpentine and rosin in the rosin liquid, and preparing to achieve a certain ratio; (2) metering the pure rosin liquid, preparing the pure rosin liquid with turpentine to obtain a reaction raw material A, and reacting the reaction raw material A with a dienophile addition agent under the action of catalysis, so as to generate a turpentine-rosin diene addition product; (3) performing esterification on polyols and the turpentine-rosin diene addition product; (4) performing vacuum reduced pressure distillation to remove water generated during the esterification, unreacted alcohols, and the low-molecular substances generated by side reactions, so as to obtain the polyol ester resin of terpene-rosin diene addition product. The method disclosed by the invention is simple in process flow and achieves energy-saving and environment-friendly effects.

The invention relates to a method for preparing functionalized crosslinked monodisperse polymer microspheres through one-step dispersion polymerization. The method takes polyfunctional thiol, isocyanate and functional monomers as disperse phases and takes an alcohol-water solution of polyvinyl pyrrolidone as a continuous phase and carries out one-step dispersion polymerization at room temperature under the condition of no additional catalyst / initiator so as to obtain the functionalized crosslinked monodisperse microspheres. Different from the traditional free radical chain polymerization mechanism, the thiol-isocyanate reaction follows the anionic step polymerization mechanism, the reaction can be efficiently carried out in the presence of few nucleophilic reagents, and no side reaction is generated in the presence of water, alcohol and amine. A very high monomer conversion rate can be obtained within a very short period of time in polymerization. The method is very suitable for preparing polymer microspheres in heterogeneous system polymerization. Therefore, compared with the traditional dispersion polymerization, the method provided by the invention has the advantages of being efficient and energy-saving in preparation process, simple in technological operation and easy to realize large-scale preparation and popularization.

The invention provides a nano-fluorescent probe as well as a preparation method and application thereof. The nano-fluorescent probe is a composite nanomaterial, a surface sulfydryl modified SiO2 nanofiber is taken as a matrix fiber, gold nanoparticles and Hg<2+> ions are modified on the surface of the matrix fiber, the gold nanoparticles are connected to the matrix fiber through sulfydryl, and Hg<2+> ions are attached to the nanomaterial through metal bonds formed by the Hg<2+> ions and Au<+>; and the particle size of the gold nanoparticles is less than 3 nm, the radial size of the nano-fluorescent probe is in nanoscale, and the axial size of the nano-fluorescent probe is in micron-scale. The probe can be used for qualitative and quantitative detection of glutathione and is simple to operate, high in sensitivity, recyclable and higher in economic value, and the preparation method has the advantages of being simple, energy-saving and environment-friendly.

The invention provides a metal substrate / cobalt-containing hydrotalcite nano-film electrode and a preparation method thereof. The electrode is obtained by growing a cobalt-containing hydrotalcite nano-film on a metal substrate, and can be directly used as an electrode. The preparation method is as follows: adding H2O2 into mixed salt liquor containing transition metal and cobalt to prepare electrolyte; adding an electrolyte into an electrolytic tank; on the basis of taking the metal substrate as a working electrode, carrying out electro-deposition at a room temperature, combining metal ions in liquor with hydroxyl radical, directly growing on the surface of the metal substrate, partly oxidizing divalent cobalt ion into trivalent cobalt ion by H2O2 to obtain a cobalt-containing hydrotalcite nano-film. Compared with the conventional powder synthetic method, the preparation method disclosed by the invention is simple to operate and gentle in reaction condition, and has non-toxic reaction agent; the nano-film is directly grown on the metal substrate without using a binder or carrying out post-treatment. The substrate can be a flexible metal substrate in various dimensions, and is suitable for large-scale production and engineering application of the cobalt-containing hydrotalcite nano-film. The cobalt-containing hydrotalcite nano-film electrode can be directly used for electrochemical water oxidation catalytic reaction, and has high catalytic activity on water oxidization reaction and good stability.

The invention provides a ceramic nanofiber and a preparing method and device thereof. The method comprises the steps of providing a precursor solution with spinnability, wherein the precursor solution includes a ceramic precursor, a polymer and a solvent; utilizing airflow to stretch the precursor solution into the nanofiber, and using a collector to collect the nanofiber; conducting sintering on the nanofiber obtained from collection to obtain the ceramic nanofiber. According to the ceramic nanofiber and the preparing method and device thereof, ultra-light, high temperature resistant and cheap ceramic nanofiber can be prepared massively, and the preparing method is fast, efficient and energy conserving, and has potential of industrialized mass production.

The invention discloses a preparation method of a visible-light-induced photocatalyst with a core-shell structure. Firstly, a solvothermal method is adopted to prepare a Bi2S3 nanowire serving as a core; then, the Bi2S3 nanowire is used as a base material, a gradual assembly method is utilized to perform in-situ growth, and porous ZIF-8 serving as a shell is obtained, namely the visible-light-induced photocatalyst with the Bi2S3 nanowire serving as the core and the porous ZIF-8 as the shell is obtained. The preparation conditions are mild, the process is simple, the maneuverability is good, the obtained material has the advantages of high stability and catalytic efficiency and has the obvious visible light degradation effect on dye wastewater, the visible-light-induced photocatalyst is used for degrading Rhodamine B under visual light, the highest catalysis rate can be up to 97% in 90 minutes, and the photocatalyst is hopeful to be applied in other aspects, for example, gas absorption, photoelectric materials or photocatalytic materials.