▎ 摘　　要

NOVELTY - Nano PVA material wood plywood board comprises 70-80 pts. wt. delignified recyclable wood fiber filler, 55-65 pts. wt. polymethyl methacrylate, 75-85 pts. wt. polylactic acid, 15-20 pts. wt. polyamide polyamine epichlorohydrin, 30-40 pts. wt. soy protein powder, 0.05-0.1 pts. wt. sodium ethylenediaminetetraacetate (EDTA), 20-25 pts. wt. sodium dodecyl sulfate, 15-20 pts. wt. sodium persulfate, 7-15 pts. wt. nano calcium carbonate, 10-20 pts. wt. graphene, 20-30 pts. wt. aluminum silicate fiber and 20-30 pts. wt. epoxy resin. USE - Used as nano polyvinyl alcohol material wood plywood board. ADVANTAGE - The wood plywood board: uses part of the graphene-doped polymethyl methacrylate polylactic acid graft copolymer to prepare a surface-modified aluminum silicate fiber film with wettability as a bonding layer; uses the other part after soybean protein powder and polyamide polyamine epichlorohydrin form a particle colloidal solution with good adhesion, the delignified recyclable wood fiber filler and nano calcium carbonate are added to prepare a single-layer board, and then the bonding layer is sequentially stacked after being combined with a single-layer board, a cold-pressing and thermosetting method is used to prepare a nano-PVA wood glue board that can prevent mold growth, is not easy to layer under humid environment or ultraviolet light, and has flame-resistant properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing nano PVA material wood rubber plate, comprising (i) dissolving polymethyl methacrylate, polylactic acid, sodium persulfate in distilled water, stirring for 20-30 minutes at 30-40 degrees C to obtain the polymethyl methacrylate-polylactic acid graft copolymer precursor solution; (ii) adding the graphene of the weight component into the mixed solution obtained in the step (i), oscillating and mixing under the ultrasonic wave of 30-50 Hz frequency; (iii) dissolving the sodium dodecyl sulfate of the weight component in distilled water, forming sodium dodecyl sulfate solution with concentration of 2-2.5 M, mixing the solution of the step (i) and the step (ii), and continuously stirring for 15 minutes under the rotating speed of 120-150 rpm, dropping the sodium dodecyl sulfate solution in the stirring process, centrifuging the obtained mixed solution for 3-4 times, drying the obtained precipitate at 45-60 degrees C for 30-60 minutes to obtain the polymethyl methacrylate-polylacticacid graft copolymer doped with graphene; (iv) heating soybean protein powder at 28-32 degrees C, dissolving in 250-300 ml distilled water at 100-200 rpm rotating speed, forming soybean protein solution, dissolving the polymethyl methacrylate-polylactic acid graft copolymer doped with graphene obtained in step (iii) of half weight component at temperature and rotating speed in soybean protein solution; forming the precursor solution of polymethyl methacrylate-polylactic acid graft copolymer of the soybean protein polymerized doped graphene; (v) soaking the aluminum silicate fiber of the weight component in the polymethyl methacrylate-polylactic acid graft copolymer precursor solution of the soybean protein polymerization doped graphene at 40-50 degrees C under 40-60 Hz frequency ultrasonic mixing for 30-45 minutes, air drying for 30-60 minutes under the nitrogen gas flow to obtain the wet polymer surface modified aluminum silicate fiber film; (vi) dissolving polyamide polyamine epichlorohydrin in ethanol solution to form polyamide polyamine epichlorohydrin ethanol solution, dissolving the remaining half weight component of step (iii) to obtain the doped graphene polymethylmethacrylate-polylactic acid graft copolymer dissolved in the polyamide polyamine epoxy chloropropane ethanol solution, at 25-27 degrees C, stirring at 200-300 rpm for 1-1.5 hours to obtain the polyamide polyamine epoxychloropropane/doped graphene polymethylmethacrylate-polylactic acid graft copolymer core-shell nano-particle colloidal solution, the core is polymethylmethacrylate-polylactic acid graft copolymer doped with graphene, the shell is polyamide polyamine epichlorohydrin; (vii) uniformly mixing the nano-particle colloidal solution obtained in the step (vi) in the epoxy resin of the weight component to obtain the nano-particle adhesive; immersing the lignin-free lignin fiber filler of weight component in the nano-particle adhesive mixing agent, stirring at a rotating speed of 800-1000 rpm, continuously adding nano calcium carbonate of the weight component and sodium ethylene diamine tetraaceticacid of the weight component during stirring, obtaining the lignin-free lignin fiber filler loaded with nano-calcium carbonate; (viii) obtaining the loaded nano-calcium carbonate lignin-recoverable lignin fiber filler under the vacuum degree of 4.5-5.5 bar for 1-1.5 hours to obtain the loaded nano-calcium carbonate lignin-recoverable lignin fiber filler layer, as the veneer layer; and (ix) single-layer plate obtained in the step (viii) and the wet polymer surface modified aluminum silicate fiber film obtained in the step (v) are placed in the mold according to the needed number, at -15 to -5 degrees C under 25-40 MPa, then curing for 0.8-1.25 hours at 90-140 degrees C.