Method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent

1 . A method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent, comprising the following steps:

S 1 . Extraction of biomimetic weathering enzyme, comprising: dissolving a plant raw material of biomimetic weathering enzyme, adjusting pH, increasing stability of the solution, boiling the solution and holding at a constant temperature, and filtering to obtain a first solution; adjusting pH of the first solution, precipitating and filtering to obtain a first precipitate; and then adjusting pH of the first precipitate, precipitating and filtering to obtain a second precipitate, and drying the second precipitate to obtain the biomimetic weathering enzyme in solid form;

S 2 . Preparation of a solution of biomimetic weathering enzyme glass thinning agent, comprising: mixing 7-20 weight parts of water, 0.1-2 weight parts of stabilizer, 0.1-1 weight parts of pH regulator C, and 0.1-1 weight parts of adjuvant to 1 weight part of biomimetic weathering enzyme in solid form, to obtain the solution of biomimetic weathering enzyme glass thinning agent; and

S 3 . Glass thinning, comprising: completely immersing a glass to be thinned in a container containing the solution of biomimetic weathering enzyme glass thinning agent, shaking at a constant temperature of 60-120° C. for 10-50 h, taking out and cleaning with water to obtain a thinned glass.

2 . The method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent of claim 1 , further comprising step S 4 ,

S 4 . Repeated thinning, comprising: determining whether a thickness of the thinned glass has reached to a thinning target, if yes, the preparation of the ultra-thin flexible glass is completed; and if not, replacing the solution of biomimetic weathering enzyme glass thinning agent in the container of step S 3 with an unused solution of biomimetic weathering enzyme glass thinning agent, and then repeating step S 3 .

3 . The method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent of claim 1 , wherein, in step S 3 , the glass to be thinned is a silicate glass with a mass percentage of SiO 2 >65%, a mass percentage of CaO<12%, a mass percentage of MgO<8%, and a mass percentage of Fe 2 O 3 <5%;

the silicate glass is any one selected from the group consisting of soda-lime glass, ultra-white glass, quartz glass, high borosilicate glass, and high aluminosilicate glass; and

a work temperature of the solution of biomimetic weathering enzyme glass thinning agent is in a range of 25-120° C.

4 . The method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent of claim 1 , wherein, in step S 1 , the plant raw material of biomimetic weathering enzyme is any one or more selected from the group consisting of Persimmon calyx, Liquorice, Gallnut, Astragalus, Catechu, Ginseng fruit root, Pine branch, Rice root, lichen, Tea, Salvia miltiorrhiza , Ginkgo leaf, Lychee root, Kiwifruit root, Multiflora rose root, papaya root.

5 . The method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent of claim 1 , wherein, in step S 2 , the pH regulator C is any one or more selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, ammonia water, ethanolamine, diethanolamine, triethanolamine, and triethylamine; and

the ammonia water has a concentration of 20-30%.

6 . The method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent of claim 1 , wherein, the adjuvant in step S 2 is any one or more selected from the group consisting of citric acid, citrate, ethylenediaminetetraacetic acid, ethylenediaminetetraacetate, tartaric acid, tartrate, potassium ferrocyanide, potassium sodium ferrocyanide, sodium sulfide, potassium sulfide, phosphoric acid, phosphate, tripolyphosphoric acid, tripolyphosphate, hexametaphosphoric acid and hexametaphosphate.

7 . The method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent of claim 1 , wherein, the step S 1 comprises the following steps:

S 11 . Dissolution, comprising: mixing 1-5 weight parts of plant raw material of biomimetic weathering enzyme to 20 weight parts of water-ethanol mixed solvent, then adding 0.1-3 weight parts of pH regulator A and 0.1-5 weight parts of stabilizer, and heating to boil, holding at a constant temperature of 100-120° C. for 6-48 h, and filtering out plant residues, to obtain the first solution;

S 12 . First filtration, comprising: cooling the first solution to room temperature, adding 0.2-5 weight parts of precipitant A and 0.1-3 weight parts of pH regulator B, standing at room temperature for 2-12 h, and then filtering to obtain the first precipitate; and

S 13 . Second filtration, comprising: dissolving 1 weight part of the first precipitate with 6-20 weight parts of water, heating the solution to 60-100° C., adding 0.1-2 weight parts of precipitant B, standing and cooling for 2-12 h, filtering to obtain the second precipitate, and drying the second precipitate to obtain the biomimetic weathering enzyme in solid form.

8 . The method for preparing ultra-thin flexible glass by using biomimetic weathering enzyme compound glass thinning agent of claim 7 , wherein,

in step S 11 , the water-ethanol mixed solvent is a solution with a mass percentage of 1:0.1-0.7;

in step S 11 , the pH regulator A is any one or more selected from the group consisting of sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, ammonia water, lime, ethanolamine, citric acid, citrate, tartaric acid and tartrate;

the ammonia water has a concentration of 20-30%; and

in step S 12 , the pH regulator B is any one or more selected from the group consisting of magnesium oxide, magnesium hydroxide, calcium hydroxide, calcium oxide, acetic acid, acetate, citric acid, citrate, phosphoric acid, phosphate and borax.

9 . The method for preparing ultra-thin flexible glass using a biomimetic weathering enzyme compound glass thinning agent of claim 7 , wherein, in step S 12 , the precipitant A is any one or more selected from the group consisting of: tartaric acid, tartrate, malic acid, malate, phthalic acid, phthalate, citric acid, citrate, phosphoric acid, phosphate, polyphosphoric acid, polyphosphate, lactic acid, lactate, gluconic acid, gluconate, oxalic acid and oxalate;

in step S 13 , the precipitant B is any one or more selected from the group consisting of: ethanolamine, diethanolamine, triethanolamine, trimethylamine, triethylamine, ethylenediamine, isopropylamine, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide; and

each of the tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide is an aqueous solutions at a concentration of 40%.

10 . The method for preparing ultra-thin flexible glass using a biomimetic weathering enzyme compound glass thinning agent of claim 1 , wherein, the stabilizer in steps S 11 and S 2 is any one or more selected from the group consisting of benzoic acid, benzoate, sorbic acid, sorbate, diacetic acid, diacetate, dithionous acid, dithionite, p-dihydroxybenzene, tert-butylp-dihydroxybenzene, o-dihydroxybenzene, tert-butylo-dihydroxybenzene, pyrogallol, gallic acid, gallate, gallate ester, ascorbic acid, ascorbate, ascorbate ester, isoascorbic acid, ascorbate, and ascorbate ester.