Patent ID: 11969986
Assignee: CHANGZHOU UNIVERSITY
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A bionic laminated thermal insulation material comprising laminated multiple thin layers, with micropores in the thin layers, to form a structure having excellent refractory and thermal insulation properties as the bark of Sequoia sempervirens and having a low thermal conductivity and a small thickness of laminated thermal insulation material;
wherein the thermal insulation material is made from a low thermal conductivity microporous powder as main raw material, into which reinforcing agent, plasticizer and porosity agent are added to form microporous thin-layer units, and the thin-layer units are bonded and laminated by adhesive to form the laminated thermal insulation material;
wherein each laminate unit consists of the following weight percentages: 70-93 wt % of low thermal conductivity microporous powder, 5-20 wt % of reinforcing agent, 1-5 wt % of plasticizer, and 1-5 wt % of porosity agent;
wherein the low thermal conductivity microporous powder is a mixture of one or more of silica, alumina, titanium oxide and zirconium oxide in the form of micro-scaled or nano-scaled porous powder material;
wherein the reinforcing agent is a blend of one or more of alumina silicate, high alumina, mullite, alumina and zirconia inorganic fibers;
wherein the plasticiser is a mixture of one or both of PEG-400 and BBP;
wherein the porosity agent is a mixture of one or more of ammonium bicarbonate, silicon carbide, starch and toner;
wherein the adhesive is an inorganic high temperature binder mixed with one or both of silica sol and aluminum sol, or an organic non-toxic binder mixed with one or both of polyvinylpyrrolidone and polyvinyl butyral ester;
wherein the laminated thermal insulation material has a thickness of 40-50 mm and a thermal conductivity of 0.02-0.05 W/m·k; and each thin layer unit has a thickness of 2-3 mm; and
wherein the bionic laminated thermal insulation material is prepared by:
mixing the low thermal conductivity microporous powder, the reinforcing agent, the plasticizer and the porosity agent in the above weight percentages to form a slurry;
preparing thin-layer units from the slurry;
bonding the thin-layer units by the adhesive to form a laminated blank; and
drying the blank in a drying oven at 70-150° C. for 4-24 hours to obtain the bionic laminate insulation material.