A kind of method that artificial board removes formaldehyde
Technical field
The invention belongs to environmental protection technical field, and in particular to a kind of method that artificial board removes formaldehyde.
Background technology
Poisonous and harmful substance is mainly derived from the pollutants such as formaldehyde, ammonia that building and ornament materials are discharged.Formaldehyde is higher
The material of toxicity, formaldehyde is in second on China's toxic chemical priority acccess control list.Formaldehyde is by world health group
Knit and be defined as carcinogenic and cause deformed material, be also one of potential strong carcinogen.Long Term Contact low dosage formaldehyde can cause chronic
Breathing problem, causes nasopharyngeal carcinoma, colon cancer, brain tumor, pregnancy syndrome, causes neonatal chromosome disorder, leukaemia, causes
Teenager's memory and intelligence decline.In all contactees, children and pregnant woman's PARA FORMALDEHYDE PRILLS(91,95) are particularly sensitive, endanger also just bigger.
Counted according to related data and shown:The mankind have 70% illness relevant with indoor environment, and China has 120,000 people to die from indoor dirt every year
Dye, more than 90% child leukaemic all live in new clothes repair the house it is ill in 1 year.
Most of formaldehyde are present in the made wooden boards of finishing.Various wood-based plates, such as density board, gluing
Plate, core-board etc., using urea formaldehyde resin adhesive, Lauxite inevitably remains part trip during glue
From formaldehyde, outwardly distribute.In addition, Lauxite also generates a small amount of linear resin in preparation process, in long-term use
During, it is also possible to free shape formaldehyde is resolved into, is also outwardly distributed, very big infringement is caused to human body.
The method of current elimination formaldehyde, one is to reduce the formaldehyde in adhesive, but this method can not possibly be completely eliminated
Formaldehyde, unlikely eliminates the formaldehyde in linear resin.Therefore, remove not thorough.Two is to use the adhesive without formaldehyde, but
This adhesive it is relatively costly.
The content of the invention
To solve the above problems, the present invention provides a kind of method that artificial board removes formaldehyde, and removal effect is good, low cost,
Process is simple, can eliminate the formaldehyde in linear resin.
What the present invention was achieved through the following technical solutions:
A kind of method that wood-based plate removes formaldehyde, comprises the following steps:
(1)Artificial board is placed in closed space, nitrogen is passed through, spray solution A to humidity is 30-60%, is heated to
60-70 DEG C, it is incubated 2-4 hours;
(2)It is 10-15% to dry to humidity, is incubated 1-2 hours;
(3)Vacuumize, be cooled to 30 DEG C, be incubated 2-5 hours;
(4)Artificial board spray solution B, is warming up to 40-50 DEG C, is incubated 0.5-2 hours, then is cooled to 25-30 DEG C, drying.
Heating not only promotes the volatilization of free formaldehyde, it is also possible to promote the fracture of unstable linear resin chain, formaldehyde is released
Release, while heating also promotes the reaction of solution and formaldehyde, generating structure stabilization, environmentally safe material.
Preferably, the step(1)Middle solution A be amino acid, ethylenediamine tetra-acetic acid, Dodecyl Polyglucosides, Tea Polyphenols,
The mixed aqueous solution of ammonium phosphate and 1, 8-Cineole, concentration is 0.1-1g/L.Wherein, amino acid, ethylenediamine tetra-acetic acid, dodecane
The mass ratio of base glucoside, Tea Polyphenols, ammonium phosphate and 1, 8-Cineole is 1:1-3:2:1:2:0.5.
Preferably, the step(4)In solution B be epoxychloropropane modified polyethyleneimine and stryrene divinyl
The mixed aqueous solution of base benzene EVA.Wherein, the matter of polyethyleneimine epoxychloropropane and styrene-divinylbenzene copolymer
Amount is than being 1-5:10, the concentration of solution is 0.05-0.5g/L, and regulation pH is 5-6.
Styrene-divinylbenzene copolymer is soluble in water, transparent solution, and ten thousand/several mass fraction is have to kill
The ability of bacterium sterilization, it is non-stimulated to skin, it is non-toxic, metal is not corroded, even if also stablizing in boiling water, its sterilizing ability with
PH value is raised and increased.Additionally, it also has good foamability.
The method of epoxychloropropane modified polyethyleneimine, increased the content of acidic-group, and acidity is improved, and hydrophily is carried
It is high.Formaldehyde absorption with formaldehyde reaction, is generated one layer of diaphragm of stabilization by solution, and protection is played a part of to sheet material.
Preferably, step(1)The speed of described heating is 10-20 DEG C/h, step(4)Described heating rate is 10-
15℃/h。
Useful achievement of the invention:
The present invention provides a kind of method that wood-based plate removes formaldehyde, and the method removes the efficiency high of formaldehyde, and environmental protection is simple to operate.
Specific embodiment
Essence for a better understanding of the present invention, enters to advance below by specific embodiment to technical scheme
The elaboration of one step.
Embodiment 1
A kind of method that wood-based plate removes formaldehyde, comprises the following steps:
(1)Artificial board is placed in closed space, nitrogen is passed through, spray solution A to humidity is 30%, according to heating speed
10 DEG C/h of rate, is heated to 60 DEG C, is incubated 2 hours, and solution A is many amino acid, ethylenediamine tetra-acetic acid, Dodecyl Polyglucosides, tea
The mixed aqueous solution of phenol, ammonium phosphate and 1, 8-Cineole, concentration is 0.1g/L, amino acid, ethylenediamine tetra-acetic acid, dodecyl Portugal
The mass ratio of glucosides, Tea Polyphenols, ammonium phosphate and 1, 8-Cineole is 1:1:2:1:2:0.5.
(2)It is 10% to dry to humidity, is incubated 1 hour;
(3)Vacuumize, be cooled to 30 DEG C, be incubated 2 hours;
(4)Artificial board spray solution B, according to 10 DEG C/h of heating rate, is warming up to 40 DEG C, is incubated 0.5 hour, then be cooled to 25
DEG C, dry.Solution B is the mixed aqueous solution of epoxychloropropane modified polyethyleneimine and styrene-divinylbenzene copolymer,
Polyethyleneimine epoxychloropropane is 1 with the mass ratio of styrene-divinylbenzene copolymer:10, the concentration of solution is
0.05g/L, regulation pH is 6.
Embodiment 2
A kind of method that wood-based plate removes formaldehyde, comprises the following steps:
(1)Artificial board is placed in closed space, nitrogen is passed through, spray solution A to humidity is 60%, according to heating speed
20 DEG C/h of rate, is heated to 70 DEG C, is incubated 4 hours, and solution A is many amino acid, ethylenediamine tetra-acetic acid, Dodecyl Polyglucosides, tea
The mixed aqueous solution of phenol, ammonium phosphate and 1, 8-Cineole, concentration is 1g/L, amino acid, ethylenediamine tetra-acetic acid, dodecyl glucose
The mass ratio of glycosides, Tea Polyphenols, ammonium phosphate and 1, 8-Cineole is 1: 3:2:1:2:0.5.
(2)It is 15% to dry to humidity, is incubated 2 hours;
(3)Vacuumize, be cooled to 30 DEG C, be incubated 5 hours;
(4)Artificial board spray solution B, according to 15 DEG C/h of heating rate, is warming up to 50 DEG C, is incubated 2 hours, then be cooled to 30
DEG C, dry.Solution B is the mixed aqueous solution of epoxychloropropane modified polyethyleneimine and styrene-divinylbenzene copolymer,
Polyethyleneimine epoxychloropropane is 5 with the mass ratio of styrene-divinylbenzene copolymer:10, the concentration of solution is 0.5g/
L, regulation pH is 5.
Embodiment 3
A kind of method that wood-based plate removes formaldehyde, comprises the following steps:
(1)Artificial board is placed in closed space, nitrogen is passed through, spray solution A to humidity is 45%, according to heating speed
15 DEG C/h of rate, is heated to 65 DEG C, is incubated 3 hours, and solution A is many amino acid, ethylenediamine tetra-acetic acid, Dodecyl Polyglucosides, tea
The mixed aqueous solution of phenol, ammonium phosphate and 1, 8-Cineole, concentration is 0.5g/L, amino acid, ethylenediamine tetra-acetic acid, dodecyl Portugal
The mass ratio of glucosides, Tea Polyphenols, ammonium phosphate and 1, 8-Cineole is 1:2:2:1:2:0.5.
(2)It is 125% to dry to humidity, is incubated 1.5 hours;
(3)Vacuumize, be cooled to 30 DEG C, be incubated 3 hours;
(4)Artificial board spray solution B, according to 12 DEG C/h of heating rate, is warming up to 45 DEG C, is incubated 1 hour, then be cooled to 30
DEG C, dry.Solution B is the mixed aqueous solution of epoxychloropropane modified polyethyleneimine and styrene-divinylbenzene copolymer,
Polyethyleneimine epoxychloropropane is 3 with the mass ratio of styrene-divinylbenzene copolymer:10, the concentration of solution is 0.2g/
L, regulation pH is 5.5.
Comparative example 1
Solution A in embodiment 1 is replaced into Dodecyl Polyglucosides 1~3%, methanal trapping agent 2~6%, cetyl front three
The methanal trapping agent of base ammonium bromide 0.5~1.5%, balance of water compounding, other conditions are constant.
Comparative example 2
Solution B in embodiment 1 is replaced into Dodecyl Polyglucosides 1~3%, methanal trapping agent 2~6%, cetyl front three
The methanal trapping agent of base ammonium bromide 0.5~1.5%, balance of water compounding, other conditions are constant.
Comparative example 3
Solution A in embodiment 1 is replaced with the aqueous solution of urea, other conditions are constant.
Comparative example 4
Solution B in embodiment 1 is replaced with the aqueous solution of urea, other conditions are constant.
According to the method for above-described embodiment, artificial board is processed, be placed on 22-28 DEG C, humidity is 50%, flow velocity 0.3m/s
Environment in, carry out burst size of methanal test.
Using the method for the present invention, the formaldehyde of artificial board is not only removed, moreover it is possible to effectively suppress bacterium, insect etc. on sheet material
Growth, the pest-resistant bacteriological protection of anti-corrosion is environment friendly and pollution-free.