Bionic laminated thermal insulation material

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.