Method for manufacturing transparent heat-insulation building material based on waste wood

A method for manufacturing a transparent heat-insulation building material from waste wood, comprising the following steps of:

• step S1, wood pretreatment comprising the following steps:
• step S1.1, ventilating and drying the waste wood until water content is 3%-7% to obtain dried waste wood;
• step S1.2, immersing the dried waste wood in a hydrogen peroxide solution, and heating;
• and
• step S1.3, adding a complexing agent solution into the hydrogen peroxide solution obtained in the step S1.2, heating, then adding a buffering agent solution, stirring, and reacting for 0.8h-1.2h to obtain reacted wood, taking out the reacted wood, washing and drying the reacted wood until the water content is 3%-7%, to obtain pretreated wood;
• step S2, wood acetylation treatment comprising the following steps:
• step S2.1, loading the pretreated wood into a pressure vessel, and evacuating until a degree of vacuum is 0.75 atm-0.85 atm;
• step S2.2, adding acetylation fluid into the pressure vessel, while reducing pressure of the pressure vessel until the degree of vacuum is less than or equal to 0.7 atm, and keeping for 3-4 h;
• and
• step S2.3, pressurizing the pressure vessel until gauge pressure is 10 atm, raising the temperature to 100° C.-130° C., and keeping for 1-2h to obtain an acetylated wood;
• step S3, resin impregnating comprising the following steps:
• step S3.1, adding 4-6 parts by mass of antimony tin oxide nanoparticles into 25-30 parts by mass of a methyl methacrylate monomer solution, and heating to 75° C.-85° C.;
• then adding 60-65 parts by mass of methyl methacrylate monomer and 1-2 parts by mass of benzoyl peroxide, stirring and conducting a pre-polymerization reaction to obtain a prepolymer liquid;
• step S3.2, bleaching the acetylated wood by hydrogen peroxide, washing, and drying;
• step S3.3, placing the acetylated wood treated in the step 3.2 in a lower chamber of a vacuum permeator, and evacuating;
• step S3.4, flowing the prepolymer liquid prepared in the step S3.1 in an upper chamber of the vacuum permeator and permeating the prepolymer liquid into the acetylated wood in the lower chamber to obtain permeated wood;
• and
• step S3.5, collecting remaining prepolymer liquid, and repeating the step S3.4;
• and
• step S4, hot press molding comprising the following steps:
• step S4.1, clamping the permeated wood with a clamping plate, wrapping the permeated wood with an aluminum foil, and polymerizing the permeated wood in an oven at 80° C.-85° C. for 5-6 h;
• and
• step S4.2, sleeving the permeated wood treated in the step S4.1 into a template of a heat press molding, and pressing for 20-28 h under a pressure of 4-5 MPa at a pressing temperature of 90° C.-100° C. to obtain a densified wood.