39results about How to "Improve thermal insulation properties" patented technology

The invention discloses a nano-porous aerogel / fiber composite super thermal insulation material and a preparation method thereof. The aerogel / fiber composite super thermal insulation material comprises silicon dioxide aerogel, alumina micro powder, zirconium oxide fibers and opacifying agent of titanium dioxide. The preparation method comprises that organic solvent, cross-linking agents and organic monomers make up pre-mixed solution according to a certain proportion, the silicon dioxide aerogel, the alumina micro powder, the zirconium oxide fibers, pore-forming agents, suspending agents and the titanium dioxide make up slurry through a ball milling process according to a certain proportion, then a certain amount of initiating agents and a certain amount of catalytic agents are dropwise added into the slurry through vacuum bubble removal, composite material in-situ solidification is achieved through a gel injection moulding process, and then demoulding, vacuum drying and degreasing glue discharging are conducted. The nano-porous aerogel / fiber composite super thermal insulation material has a nano-porous / reinforced fiber composite microstructure, the heat conductivity is 0.040-0.046W*m<-1>*K<-1> (298K), and the flexure strength is as high as 12-14MPa. Preparation processes are simple, industrialized application is easily achieved on a large scale, and the nano-porous aerogel / fiber composite super thermal insulation material is suitable for thermal protection of aerospace, military affairs and severe rugged environments.

A method of preparing aerogels / nonwoven composites fireproof and heat-insulating materials with a hydrophobic or hydrophilic surfaces and includes steps as follows. A mixture solution in which alkoxysilane, silicones and silane coupling agents are mixed and stirred is instilled by acidic catalysts for a hydrolysis reaction during which a silane coupling agent solution is added for continuous stirring; a hydrous alkali catalytic (anhydrous alkali catalytic) organic solution is added in the mixture solution for a condensation reaction and development of a 'silicones-silica aerogels-silane coupling agents' aerogel mixture solution; a non-woven felt is impregnated with the mixture solution for development of soft hydrophobic (hydrophilic) aerogels / nonwoven composites fireproof and heat-insulating materials after curing and natural drying. The aerogels / nonwoven composites materials with softness and surface hydrophobicity / hydrophilicity available in mass production are applicable to thermal-insulating materials for high-temp industrial facilities or indoor heat-insulating and fireproof panels of a building structure.

A power storage device, while absorbing expansion of the battery cells, prevents inducing thermal runaway by blocking heat conduction between battery cells, and is provided with: a battery stack formed by stacking multiple battery cells (1); separators (2) arranged between the battery cells (1); and a fixing member for fastening the battery stack in the stacking direction. The separator (2) is formed from a perimeter frame (3) and a thermal insulation base material (4) provided in the opening (3X) of the perimeter frame (3). The perimeter frame (3) is arranged on the outer periphery of the stacking surface (1A) of the battery cell (1) and has an opening (3X) on the inside, and the thermal insulation base material (4) has flexibility that allows deformation when pressed by the expanding stacking surface (1A) of the battery cell (1). The perimeter frame (3) is more rigid than the thermal insulation base material (4), the perimeter frame (3) specifies the interval between adjacently stacked battery cells (1), and the flexible thermal insulation base material (4) has a structure that absorbs expansion of the stacking surface (1A) of the battery cell (1).

A flexible direct-LED backlight device and a display apparatus comprising the same. The backlight device comprises a graphene heat dissipation coating (1), a flexible circuit board (2), a mini light-emitting diode (3), a bubble adhesive layer (4), an optical film layer (5), and a flexible liquid crystal display screen (6) which are sequentially disposed. At least two bubbles (41) are provided in the bubble adhesive layer (4). The bubble adhesive layer (4) having the tiny bubbles (41) is disposed between the optical film layer (5) and the mini light-emitting diode (3), such that light emitted by the mini light-emitting diode (3) is reflected when passing through the bubble adhesive layer (4), thereby effectively diffusing the light emitted by the mini light-emitting diode (3), and reducing the thickness of the bubble adhesive layer (4). The configuration can improve thermal insulation properties of the bubble adhesive layer (4), increase thermal resistance, reduce heat transferred from the backlight device to the liquid crystal display screen, reduce the temperature of the liquid crystal display screen, increase the viscosity of liquid crystal materials, and reduce light leakage. The configuration can also improve flexibility of the backlight device. When the backlight device is in a bent state, good shrinkage properties of the bubbles can offset the material deformation caused by a portion of the materials being bent, such that the backlight device can meet the demand for improved curvature.