Abstract

Disclosed are a reaction kettle and a coating preparation method using the reaction kettle. The reaction kettle includes a kettle body (100), the top of the kettle body (100) is provided with a feed port (110), and the side of the kettle body (100) is provided with a discharge port (120). An upper partition plate (200) is rotatably arranged in a chamber of the kettle body (100), an upper jet center (201) and a number of upper flow ports (202) arranged around the upper jet center (201) are respectively provided on the upper partition plate (200). A lower partition plate (300) is attached to the upper partition plate (200), a lower jet center (301), a number of lower flow ports (302) and a number of through-flow ports (303) arranged around the lower jet center (301) are respectively provided on the lower partition plate (300).

IPC Classes  ?

• B01J 19/18 - Stationary reactors having moving elements inside
• B01J 4/00 - Feed devicesFeed or outlet control devices
• B01J 19/00 - Chemical, physical or physico-chemical processes in generalTheir relevant apparatus

Abstract

22 nano-scale phase change material is prepared by means of a sol-gel method in combination with a microemulsion method under alkaline conditions. The material prepared in the present application has a particle size of about 500 nm, a phase change temperature of 27.7ºC, a phase change latent heat of 159.74 J/g, and a thermal decomposition temperature that is 50ºC higher than the thermal decomposition temperature of n-octadecane.

IPC Classes  ?

• C09K 5/06 - Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice-versa

Abstract

A silica-encapsulated nano-phase change material and its preparation method are provided. An n-octadecane SiO2 nanoscale phase change material is prepared by sol-gel and microemulsion coupling under alkaline conditions using silica as the shell material and n-octadecane as the core material in a microcapsule and using ethyl n-silicate as the silica source, cetyltrimethylammonium bromide as the emulsifier, and water and ethanol as the solvents. The materials prepared have a particle size of about 500 nm, a phase transition temperature of 27.7° C., a latent heat of phase transition of 159.74 J/g, and an elevated thermal decomposition temperature of 50° C. increase compared with that of the existing n-octadecane.

IPC Classes  ?

• C01B 33/145 - Preparation of hydroorganosols, organosols or dispersions in an organic medium

Abstract

Disclosed is a method for preparing a three-dimensional porous nano composite cooling film in large scale. The cooling film is prepared from 0.1-0.5 parts of cellulose acetate, 1-5 parts of water, 20-100 parts of acetone, an additive, and 10-20 parts of nano microspheres through a cooperative formulation of cellulose acetate, nano microsphere materials and the additive. The composite cooling film is obtained by self-deposition of cellulose acetate and nano microspheres, and liquid volatilization during film forming process leads to formation of the three-dimensional porous structure. The film has an effect of enhancing radiation of infrared heat into space, which could significantly reduce a temperature of a substrate surface and achieve rapid and strong cooling. The film could achieve effective cooling without external power and other active cooling equipment, with or without sunlight.

IPC Classes  ?

• C04B 26/28 - Polysaccharides or derivatives thereof
• B29C 39/00 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor
• C04B 20/00 - Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups and characterised by shape or grain distributionTreatment of materials according to more than one of the groups specially adapted to enhance their filling properties in mortars, concrete or artificial stoneExpanding or defibrillating materials
• C04B 38/00 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof
• C04B 40/00 - Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability

Abstract

A reaction kettle, and a coating preparation method using the reaction kettle. The reaction kettle comprises: a kettle body (100), wherein the top of the kettle body (100) is provided with a material inlet (110), and a side part of the kettle body is provided with a material outlet (120); an upper partition plate (200), which is rotatably arranged in a cavity of the kettle body (100), wherein an upper jet center (201) and several upper flow openings (202) arranged around the upper jet center (201) are respectively formed in the upper partition plate (200), and the lengths of circulation paths from the upper jet center (201) to the upper flow openings (202) are equal; and a lower partition plate (300), which is attached to the upper partition plate (200), wherein a lower jet center (301), several lower flow openings (302) arranged around the lower jet center (301), and several through-flow openings (303) are respectively formed in the lower partition plate (300), and the lengths of circulation paths from the lower jet center (301) to the lower flow openings (302) are equal. By means of the reaction kettle, the conveying of a liquid in a layered and batched manner can be realized, and mixing of two kinds of liquid is promoted; and the volatilization of a volatile substance can be well avoided by means of the lower partition plate (300), such that the mixing effect is good.

IPC Classes  ?

• B01F 35/71 - Feed mechanisms
• C23F 13/12 - Electrodes characterised by the material
• B01F 101/30 - Mixing paints or paint ingredients, e.g. pigments, dyes, colours, lacquers or enamel

Abstract

A three-dimensional porous nano composite cooling thin film and a large-scale preparation method therefor. The cooling thin film material uses 0.1-0.5 parts of cellulose acetate, 1-5 parts of water, 20-100 parts of acetone, other auxiliaries, and 10-20 parts of nano-microspheres as raw materials, and is prepared by means of the synergistic cooperation of the cellulose acetate, nano-microsphere particles, and other auxiliaries, the composite thin film being obtained by the self-deposition of cellulose acetate and nano-microspheres, and the volatilisation of liquid during the film-forming process resulting in the generation of three-dimensional pores; the thin film has the effect of enhancing the radiation of infrared heat to space, significantly reducing the surface temperature of the substrate and implementing rapid strong cooling, so that the objective of effective cooling can be reached without the need for active cooling equipment such as external power and with or without sunlight irradiation.

IPC Classes  ?

• C04B 38/00 - Porous mortars, concrete, artificial stone or ceramic warePreparation thereof
• C04B 26/24 - Cellulosic waste liquor, e.g. sulfite lye
• B29D 7/01 - Films or sheets

Abstract

Provided is a method for preparing a paraffin microcapsule phase-change material modified by graphene oxide. The technical solution comprises: adding a concentrated acid and a strong oxidant to a low-temperature ice-water bath to oxidize graphite; successively adding deionized water, hydrogen peroxide and hydrochloric acid, vacuum filtrating, drying and grinding to obtain graphene oxide, and then adding the graphene oxide into deionized water to prepare a graphene oxide solution; adding paraffin, a non-ionic emulsifier and an ionic emulsifier into a stirring kettle, increasing the temperature and adding graphite under stirring to obtain a paraffin emulsion; adding an initiator into the paraffin emulsion for dissolution and dropwise adding monomers, vacuum filtrating after the completion, washing with petroleum ether, water-washing, drying in vacuum and crushing to obtain the paraffin microcapsule powder. The preparation method has the following beneficial effects: by the reaction of various oxygen-containing groups on the surface of the graphite oxide and the polymer, the thermal stability and the thermal conductivity of the paraffin microcapsule phase-change material are improved, and the service life is prolonged; the preparation is easy and environmentally friendly. The paraffin microcapsule phase-change material can be used in the fields such as building energy saving, thermal insulation products and floor heating, etc.

IPC Classes  ?

• C09K 5/06 - Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice-versa
• B01J 13/02 - Making microcapsules or microballoons

Abstract

The present invention relates to the technical field of optical cables. Provided is a method for continuously producing strengthened optical cable cores made of an aramid fiber composite material, the production method comprising: pre-heating an aramid fiber; passing the aramid fiber through a uniformly mixed glue solution comprising an unsaturated resin, a curing agent, an unmolding agent, a filler and a coupling agent for molding and curing via a die; conducting a post-curing treatment thereon; passing the same through a tension sensor system; and drawing the same via a compression roller, and rolling to obtain a finished product. The present invention prevents a die blocking in a production process, enables continuous production over a long period of time, reduces production cost and improves production efficiency, and a long strengthened core facilitates the production of cables.

IPC Classes  ?

• B29C 70/52 - Pultrusion, i.e. forming and compressing by continuously pulling through a die