CN106363732A - Furfuryl alcohol-added and phenolic resin-compounded fast-growing wood modifying agent - Google Patents

Abstract

The invention discloses a furfuryl alcohol-added and phenolic resin-compounded fast-growing wood modifying agent. The fast-growing wood modifying agent is prepared from the following raw materials in parts by weight: 3 to 3.5 parts of formaldehyde, 2 to 3 parts of urea, 1.5 to 2 parts of hexamethylene tetramine, 0.02 to 0.03 part of maleic anhydride, a proper amount of acetic acid, a proper amount of ammonium hydroxide, a proper amount of deionized water, 20 to 23 parts of DMDHEU of which the solid content is 42wt%, 1.5 to 2 parts of magnesium chloride hexahydrate, 10 to 11 parts of silica sol, 2 to 3 parts of furfuryl alcohol, 2.5 to 3 parts of sodium octaborate, 6 to 7 parts of phenolic resin solution, 0.8 to 1 part of secondary alcohol ethoxylate, 0.3 to 0.4 part of triethanolamine oleic soap and 2 to 3 parts of borax. According to the fast-growing wood modifying agent, the wood treated through the modifying agent has good mechanical property and good acid and alkali corrosion resistance, the water absorption performance is reduced, the treated wood can be manufactured into outdoor furniture and equipment and can resist corrosion of rainwater, the utilization performance of the wood is improved, and the utilization range is expanded.

Description

A kind of fast growing wood modifying agent adding the compounding phenolic resin of furfuryl alcohol

Technical field

The present invention relates to Wood Property Improvement field, more particularly, to a kind of fast growing wood adding the compounding phenolic resin of furfuryl alcohol Modifying agent.

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.With the forest reserves in world wide increasingly Shortage, particularly precious timber quantity increasingly falls sharply, and the substantial amounts of quick growing species of trees is widely cultivated and meets in global range in recent years Wood supply.Compared with natural forest, by growth year is short etc., factor is limited the quick growing species of trees, leads to early late wood's difference very Greatly, material is loose, and mechanical property is poor, thus do not pass through to process artificial fast-growing forest timber be difficult to economical high used in Furniture manufacture etc. Added value field.Due to timber be a kind of natural there is porous macromolecular material, by the little, shapes of different fire and different company The tubular units of understanding and considerate condition are cross-linked and form, and have fluid-pervious, and its distinctive vesicular texture carries for Wooden modifying Supply basis.Physically or chemically modification is carried out to fast-growing forest, not only increases the economic value added of fast-growing forest, also Serve the effect of protection rare tree resource.Wooden modifying refers to using physics, the method such as chemical and mechanical to logs of wood Carry out manufacturability process, make physico-mechanical propertieses such as density of wood, hardness, intensity and dimensional stability etc. obtain good changing Kind.Chemical modification is modified Main Means, the selection of chemical impregnation medicinal liquid wherein in modifying process and the dipping of fast-growing forest 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, the residual how reducing chemical impregnation medicinal liquid in modified material is chemical modification fast-growing forest Urgent problem, how by fast-growing forest functionalization improvement Study on Integration towards environmental protection and functionalization to be therefore The modified new direction of this paper and from now on fast-growing forest.

" composite modifier is to quick growth poplar wood and Chinese toon wood Modification effect and study mechanism " is in a literary composition by low point of autonomous synthesis Son modification nitrogen footpath methyl performed polymer is combined with hydroxymethyl-2 dihydroxy-ethylene urea, makes many work(by adding plurality of stable agent Can type chemical modifier, preliminary study has been carried out to the timber physicochemical property after before modified and mechanism of modification, by impregnation drying Substantially, heat stability is improved the main mechanical strength improving effect of the modified material after process, 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 in wood internal Implant is especially more obvious to dimensional stability and mechanical property improvement result.Although modified fast growing wood is in mechanics Increase in performance, but because it has not significantly affected fast growing wood furniture, open air out of doors to absorptive reduction The application of wooden clothing arts, needs its composite modifier to be modified further it is also desirable to other additional properties can be had To meet the demand to fast growing wood such as outdoor furniture.

Content of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of speed adding the compounding phenolic resin of furfuryl alcohol Green wood modifying agent.

The present invention is achieved by the following technical solutions:

A kind of fast growing wood modifying agent adding the compounding phenolic resin of furfuryl alcohol, is made up of the raw material of following weight portion: formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, appropriate acetic acid, appropriate ammonia, deionized water In right amount, solid content be the hydroxymethyl-2 dihydroxy-ethylene urea 20-23 of 42wt%, Magnesium dichloride hexahydrate 1.5-2, Ludox 10-11, Furfuryl alcohol 2-3, eight sodium borate 2.5-3, Phenolic resin emulsion 6-7, secondary alcohol polyoxyethylene ether 0.8-1, trihydroxy ethylamine oleate soap 0.3- 0.4th, Borax 2-3.

A kind of described fast growing wood modifying agent adding the compounding phenolic resin of furfuryl alcohol, is made up of step in detail below:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to completely molten while stirring Solution, adds the deionized water of total amount 1.5-2 times amount, is heated to 70-80 DEG C, uses acetic acid and ammonia to adjust after stirring reaction 3-4 hour Section ph value is 7, terminates reaction；

(2) deionized water of 20-25 times amount will be added in secondary alcohol polyoxyethylene ether, dispersed with stirring uniformly adds phenolic resin breast afterwards Liquid, furfuryl alcohol, turned with 500-600/the speed stirring 10-15 minute of part after add eight sodium borate, Borax, trihydroxy ethylamine oleate soap, Continue ultrasonic disperse 30-40 minute after stirring 15-20 minute；

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

The invention has the advantage that formaldehyde, carbamide, hexamethylenetetramine are carried out reaction life by certain technique by the present invention Become performed polymer, then by being compounded with hydroxymethyl-2 dihydroxy-ethylene urea, Ludox, magnesium chloride, can after supersound process To form colloidal sol type composite modifier, wherein si-0-si framing structure plays Stabilization to modifier system, 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 in wood It is scattered in the cell wall microcellular structure of timber well, with Wood chemical composition in subsequent heat drying in material dipping process 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 bending strength of modified 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 There is etherification reaction in cellulose and lignin, such reaction can reduce hydrophilic hydroxy group in timber, thus significantly reducing wood Material hygroscopicity.

The present invention is compounded with phenolic resin using furfuryl alcohol, is added in the preparation of modifying agent, not only remains phenolic aldehyde Wear-resisting, the pliable and tough feature of resin, and improve acidproof, the alkaline resistance properties of modifying agent, with this modifying agent, fast growing wood is carried out Impregnation process, so that timber not only has good mechanical property, also has good acid-alkali-corrosive-resisting performance, and water absorption drops Low, outdoor furniture and equipment can also be made, rainwater etc. can be resisted and corrode, improve the serviceability of timber, expand Range.

Specific embodiment

A kind of fast growing wood modifying agent adding the compounding phenolic resin of furfuryl alcohol, by the raw material preparation of following weight portion (kilogram) Make: formaldehyde 3, carbamide 2, hexamethylenetetramine 1.5, maleic anhydride 0.02, appropriate acetic acid, appropriate ammonia, appropriate deionized water, Solid content is the hydroxymethyl-2 dihydroxy-ethylene urea 20 of 42wt%, Magnesium dichloride hexahydrate 1.5, Ludox 10, furfuryl alcohol 2, eight sodium borate 2.5th, Phenolic resin emulsion 6, secondary alcohol polyoxyethylene ether 0.8, trihydroxy ethylamine oleate soap 0.3, Borax 2.

A kind of described fast growing wood modifying agent adding the compounding phenolic resin of furfuryl alcohol, is made up of step in detail below:

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

(2) deionized water of 20 times amount will be added in secondary alcohol polyoxyethylene ether, dispersed with stirring uniformly afterwards add Phenolic resin emulsion, Furfuryl alcohol, adds eight sodium borate, Borax, trihydroxy ethylamine oleate soap with the speed of 500 turns/part after stirring 10 minutes, continue stirring 15 Ultrasonic disperse 30 minutes after minute；

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

Fast growing wood is processed into the veneer of certain specification, 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 keep 15-20 minute；After sheet material is taken out, environment air dry disposed within is extremely aqueous Rate is less than 30%, is then placed in baking oven, first 6-8 hour is dried at 80-90 DEG C, then solidifies 4-5 hour at 120-130 DEG C, cold But discharging after obtains modified fast growing wood.Modified fast growing wood is compared with unmodified timber, Absolute Dry Density Improve 65.3%, bending strength improves 63.8%, parallel-to-grain compressive strength improves 17.7%, and whole water absorption rate reduces 36.1%.

Claims (2)

1. a kind of furfuryl alcohol that adds compounds the fast growing wood modifying agent of phenolic resin it is characterised in that raw material by following weight portion Preparation is made: formaldehyde 3-3.5, carbamide 2-3, hexamethylenetetramine 1.5-2, maleic anhydride 0.02-0.03, appropriate acetic acid, ammonia In right amount, appropriate deionized water, solid content be the hydroxymethyl-2 dihydroxy-ethylene urea 20-23 of 42wt%, Magnesium dichloride hexahydrate 1.5-2, Ludox 10-11, furfuryl alcohol 2-3, eight sodium borate 2.5-3, Phenolic resin emulsion 6-7, secondary alcohol polyoxyethylene ether 0.8-1, three ethanol Amine oleate soap 0.3-0.4, Borax 2-3.

2. according to claim 1 a kind of add furfuryl alcohol compound phenolic resin fast growing wood modifying agent it is characterised in that by Step is made in detail below:

(1) formaldehyde, carbamide, hexamethylenetetramine are put in reactor, add maleic anhydride, be heated to completely molten while stirring Solution, adds the deionized water of total amount 1.5-2 times amount, is heated to 70-80 DEG C, uses acetic acid and ammonia to adjust after stirring reaction 3-4 hour Section ph value is 7, terminates reaction；

(2) deionized water of 20-25 times amount will be added in secondary alcohol polyoxyethylene ether, dispersed with stirring uniformly adds phenolic resin breast afterwards Liquid, furfuryl alcohol, turned with 500-600/the speed stirring 10-15 minute of part after add eight sodium borate, Borax, trihydroxy ethylamine oleate soap, Continue ultrasonic disperse 30-40 minute after stirring 15-20 minute；

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