CN106313239A - Composite corrosion-resistant water-proof modifier with good permeability for fast-growing wood modification - Google Patents

Abstract

The invention discloses a composite corrosion-resistant water-proof modifier with the good permeability for fast-growing wood modification. The modifier is prepared from the following raw materials including, by weight, 3-3.5 parts of formaldehyde, 2-3 parts of urea, 1.5-2 parts of hexamine, 0.02-0.03 part of maleic anhydride, an appropriate amount of acetic acid, an appropriate amount of ammonium hydroxide, an appropriate amount of deionized water, 20-23 parts of dimethylol dihydroxy ethylene urea with the solid content being 42wt%, 1.5-2 parts of magnesium chloride hexahydrate, 10-11 parts of silica sol, 5-6 parts of basic cupric carbonate, 5-6 parts of basic zinc carbonate, 2.5-3 parts of ammonium citrate, 2-3 parts of tung oil, 2.5-3 parts of turpentine oil, and 0.1-0.2 part of tween 80. The composite corrosion-resistant water-proof modifier is safe, free of toxicity, stable in property conversion and excellent in permeability, the mechanical property of the fast-growing wood which is already treated through the modifier is comparable with high-quality wood, the water absorption rate of the wood is reduced, the corrosion resistance is excellent, and the wood is quite suitable for outdoor environments and the like and good in weather resistance.

Description

Water-repellent modified dose of the composite anti-corrosive that a kind of permeance property modified for fast growing wood is good

Technical field

The present invention relates to Wood Property Improvement field, particularly relate to a kind of permeance property modified for fast growing wood good Water-repellent modified dose of composite anti-corrosive.

Background technology

Timber and wood materials, as the important means of production in social and economic construction, are not only widely used in daily life In every field, be also widely used for the industrial circles such as traffic, building and space flight.Along with in world wide, the forest reserves are day by day Shortage, particularly precious timber quantity falls sharply day by day, and the most substantial amounts of quick growing species of trees is widely cultivated and meets in global range Wood supply.Compared with natural forest, the quick growing species of trees is limited by factors such as growth year are short, causes early that late wood's difference is very Greatly, material is loosened, and mechanical property is poor, so not being difficult to be used in the economic height such as Furniture manufacture by the artificial fast-growing woods timber of process Added value field.Owing to timber is a kind of natural to have porous macromolecular material, shapes little by different fire and Bu Tong company The tubular units of understanding and considerate condition is cross-linked and forms, and has fluid-pervious, and its distinctive vesicular texture is that Wooden modifying carries Supply basis.Fast-growing forest is carried out physically or chemically modification, not only increases the economic value added of fast-growing forest, also Serve the effect of protection rare tree resource.Wooden modifying refers to utilize physics, the method such as chemical and mechanical to logs of wood Carry out manufacturability process, make the physico-mechanical propertieses etc. such as density of wood, hardness, intensity and dimensional stability obtain good changing Kind.Chemical modification is the Main Means that fast-growing forest is modified, wherein the selection of the chemical impregnation medicinal liquid in modifying process and dipping The drying process of material is the research emphasis of Chinese scholars.But it is as the raising of living standards of the people and the increasing of environmental consciousness By force, to human health angle, how reducing chemical impregnation medicinal liquid in the residual of modified material is chemical modification fast-growing forest Urgent problem, the most how by fast-growing forest functionalization improvement Study on Integration towards environmental protection and functionalization to be The new direction that this paper and from now on fast-growing forest are modified.

By low point of autonomous synthesis in " composite modifier is to quick growth poplar wood and Chinese toon wood Modification effect and study mechanism " literary composition Son modified nitrogen footpath methyl performed polymer is combined with hydroxymethyl-2 dihydroxy-ethylene urea, makes many merits by adding plurality of stable agent Can type chemical modifier, the timber physicochemical property after before modified and mechanism of modification have been carried out preliminary study, have passed through impregnation drying The main mechanical strength improving effect of the modified material after process is obvious, and heat stability is improved, and modifying agent is impregnated into wood simultaneously When material is internal, self-condensation effect can be occurred to form tridimensional network, it is higher that modifying agent serves as intensity at wood internal Implant is especially the most obvious to dimensional stability and mechanical property improvement result.Although modified fast growing wood is at mechanics Increase in performance, but owing to it has significantly affected fast growing wood furniture out of doors, open air not to absorptive reduction The application of wood clothing arts, needs to be modified its composite modifier further, it is also desirable to can have other additional properties To meet the demand to fast growing wood such as outdoor furniture.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of permeability modified for fast growing wood Water-repellent modified dose of the composite anti-corrosive that energy is good.

The present invention is achieved by the following technical solutions:

Water-repellent modified dose of the composite anti-corrosive that a kind of permeance property modified for fast growing wood is good, by the raw material system of following weight portion Prepare into: formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, acetic acid is appropriate, ammonia is suitable Amount, deionized water are appropriate, solid content is the hydroxymethyl-2 dihydroxy-ethylene urea 20-23 of 42wt%, Magnesium dichloride hexahydrate 1.5-2, silicon Colloidal sol 10-11, basic copper carbonate 5-6, basic zinc carbonate 5-6, ammonium citrate 2.5-3, Oleum Verniciae fordii 2-3, Oleum Terebinthinae 2.5-3, tween 800.1-0.2。

Water-repellent modified dose of the composite anti-corrosive that described a kind of permeance property modified for fast growing wood is good, by walking in detail below Suddenly make:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to the most molten while stirring Solving, add the deionized water of total amount 1.5-2 times amount, be heated to 70-80 DEG C, stirring reaction was adjusted with acetic acid and ammonia after 3-4 hour Joint pH value is 7, terminates reaction；

(2) being dissolved in by ammonium citrate in 10-12 ionized water, stirring is to being completely dissolved, and addition basic copper carbonate, basic zinc carbonate are put Enter in ball mill, at normal temperatures with 3000-3500 turn/speed of part carries out wet ball grinding, ball milling discharging after 60-80 minute, continue Continuous ultrasonic disperse was poured in stirred tank after 30-40 minute, adds Oleum Verniciae fordii, Oleum Terebinthinae, Tween 80, is heated to 50-60 DEG C, with 600- Speed dispersed with stirring 50-60 minute of 800 turns/part；

(3) hydroxymethyl-2 dihydroxy-ethylene urea that solid content is 42wt% is mixed with Ludox, with the speed of 500-600 rev/min Add product and remaining residual components that step (1) step (2) obtains after stirring 10-15 minute, continue ultrasonic disperse 15-20 Minute, to obtain final product.

The invention have the advantage that formaldehyde, carbamide, hexamethylenetetramine are carried out reaction life by certain technique by the present invention Become performed polymer, then by compounding with hydroxymethyl-2 dihydroxy-ethylene urea, Ludox, magnesium chloride, can after supersound process To form colloidal sol type composite modifier, wherein modifier system is played Stabilization by Si-0-Si framing structure, by timber Carry out impregnation process, timber pickling degree of modification can be significantly improved, improve the rate of body weight gain of timber；Composite modifier can be at wood Material dipping process is well scattered in the cell wall microcellular structure of timber, with Wood chemical composition in heat drying subsequently In cellulose, hemicellulose, lignin etc. there is situ-gel polyreaction, chemical reaction finally makes the sense between them Group can connect formation covalent bond, and covalent bond is very firm, thus the modified bending strength of fast growing wood, Deflection Modulus of Elasticity and Parallel-to-grain compressive strength all improves a lot；Simultaneously composite modifier can also with the main chemical compositions cellulose of timber, half Cellulose and lignin generation etherification reaction, such reaction can reduce hydrophilic hydroxy group in timber, thus significantly reduce wood Material hygroscopicity.

The present invention is carried out with Oleum Verniciae fordii, Oleum Terebinthinae after being disperseed by ammonium citrate with basic zinc carbonate by basic copper carbonate Compounding formation has the composition of good preservative efficacy, is uniformly dispersed in product by process, good stability, for fast-growing wood The impregnation process of material, effective ingredient of the present invention can quickly penetrate in timber pore and cell, can be with the hydroxyl of cellulose There is hydrogen bond association, improve the resistance leachability of product；Safety non-toxic of the present invention, property turns stable, and permeance property is excellent so that place The mechanical property of the fast growing wood after reason compares favourably with high-quality timber, and reduces the water absorption rate of timber, and anti-corrosive properties are excellent, non- Often being suitable for use in the environment such as open air, weatherability is good.

Detailed description of the invention

Water-repellent modified dose of the composite anti-corrosive that a kind of permeance property modified for fast growing wood is good, (public by following weight portion Jin) raw material make: formaldehyde 3, carbamide 2, hexamethylenetetramine 1.5, maleic anhydride 0.02, acetic acid is appropriate, ammonia is appropriate, Deionized water is appropriate, solid content is the hydroxymethyl-2 dihydroxy-ethylene urea 20 of 42wt%, Magnesium dichloride hexahydrate 1.5, Ludox 10, Basic copper carbonate 5, basic zinc carbonate 5, ammonium citrate 2.5, Oleum Verniciae fordii 2, Oleum Terebinthinae 2.5, Tween 80 0.1.

Water-repellent modified dose of the composite anti-corrosive that described a kind of permeance property modified for fast growing wood is good, by walking in detail below Suddenly make:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to the most molten while stirring Solving, add the deionized water of total amount 1.5 times amount, be heated to 70 DEG C, stirring reaction regulates pH value with acetic acid and ammonia after 3 hours and is 7, terminate reaction；

(2) being dissolved in by ammonium citrate in 10 ionized waters, stirring is to being completely dissolved, and addition basic copper carbonate, basic zinc carbonate are put into In ball mill, carry out wet ball grinding, ball milling discharging after 60 minutes with the speed of 3000 turns/part at normal temperatures, continue ultrasonic disperse Pour into after 30 minutes in stirred tank, add Oleum Verniciae fordii, Oleum Terebinthinae, Tween 80, be heated to 50 DEG C, stir with the speed of 600 turns/part and divide Dissipate 50 minutes；

(3) hydroxymethyl-2 dihydroxy-ethylene urea that solid content is 42wt% is mixed with Ludox, stir with the speed of 500 revs/min Add product and remaining residual components that step (1) step (2) obtains after 10 minutes, continue ultrasonic disperse 15 minutes, to obtain final product.

Fast growing wood is processed into the veneer of certain specification, and being dried to moisture content is 6-10%, puts into vacuum pressure impregnation In tank, after being evacuated to-0.01MPa, keep 30-40 minute, be then rapidly injected modifying agent of the present invention, continue to keep 40-50 Minute, it is forced into 0.89-0.9 MPa afterwards and keeps 15-20 minute；After being taken out by sheet material, environment air dry disposed within is to aqueous Rate is less than 30%, is then placed in baking oven, is first dried 6-8 hour at 80-90 DEG C, then solidifies 4-5 hour at 120-130 DEG C, cold But after, discharging obtains modified fast growing wood.Modified fast growing wood is compared with unmodified timber, Absolute Dry Density Improve 67.2%, bending strength improves 63.8%, and parallel-to-grain compressive strength improves 16.6%, and whole water absorption rate reduces 34.2%.

Claims (2)

1. one kind is used for water-repellent modified dose of the composite anti-corrosive that the modified permeance property of fast growing wood is good, it is characterised in that by following The raw material of weight portion is made: formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, vinegar Acid is appropriate, ammonia is appropriate, deionized water is appropriate, solid content is 42wt% hydroxymethyl-2 dihydroxy-ethylene urea 20-23, six hydrations Magnesium chloride 1.5-2, Ludox 10-11, basic copper carbonate 5-6, basic zinc carbonate 5-6, ammonium citrate 2.5-3, Oleum Verniciae fordii 2-3, pine Fuel-economizing 2.5-3, Tween 80 0.1-0.2.

Water-repellent modified dose of the composite anti-corrosive that a kind of permeance property modified for fast growing wood is good, It is characterized in that, be made up of step in detail below:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to the most molten while stirring Solving, add the deionized water of total amount 1.5-2 times amount, be heated to 70-80 DEG C, stirring reaction was adjusted with acetic acid and ammonia after 3-4 hour Joint pH value is 7, terminates reaction；

(2) being dissolved in by ammonium citrate in 10-12 ionized water, stirring is to being completely dissolved, and addition basic copper carbonate, basic zinc carbonate are put Enter in ball mill, at normal temperatures with 3000-3500 turn/speed of part carries out wet ball grinding, ball milling discharging after 60-80 minute, continue Continuous ultrasonic disperse was poured in stirred tank after 30-40 minute, adds Oleum Verniciae fordii, Oleum Terebinthinae, Tween 80, is heated to 50-60 DEG C, with 600- Speed dispersed with stirring 50-60 minute of 800 turns/part；

(3) hydroxymethyl-2 dihydroxy-ethylene urea that solid content is 42wt% is mixed with Ludox, with the speed of 500-600 rev/min Add product and remaining residual components that step (1) step (2) obtains after stirring 10-15 minute, continue ultrasonic disperse 15-20 Minute, to obtain final product.