CN102189580A - Foaming composite modified antiseptic bamboo material - Google Patents
Foaming composite modified antiseptic bamboo material Download PDFInfo
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Abstract
The invention discloses a modified antiseptic bamboo material manufactured by a microwave secondary foaming sterilization drying method, which is obtained by adding graphite powder as a microwave absorption medium on the basis of an electrostatic adsorption method. The modified antiseptic bamboo is characterized in that the inner cavity of an original bamboo is subjected to secondary foaming compounding and filled with a mixture of a porous high-polymer foaming material and iodo-propargyl butyl carbamate, and thus, the modification and antisepsis of the bamboo material can be finished by means of the adsorption and dispersion behaviors of fluid molecules in the porous material at set temperature and pressure. The antiseptic modified bamboo material provided by the invention has industrial economic values, can be used as a structural building material, has good corrosion resistance, mould resistance and weather resistance, obviously improves the physical performance as well as processability and connectability of the bamboo material, and reduces the dry shrinkage and combustibility of the bamboo material; the processing equipment is simple, the raw materials can be easily acquired, and the production cost is low; and moreover, the bamboo material utilizes waste, is environment-friendly and light in weight and saves energy, thereby being a green ecological building material easy to popularize.
Description
Technical field
The present invention relates to a kind of bamboo wood modification aseptic technic, particularly a kind of at the blend of former bamboo inner chamber through composite filled microcellular structure high molecular foam material of second time of foaming and iodo propinyl butyl carbamate, under design temperature and pressure environment, utilize fluid molecule in poromerics, adsorb with dispersal behavior to the bamboo wood modification corrosion-resistant composite modified anticorrosion bamboo wood that foams.
Background technology
The whole world has bamboo plant more than 70 to belong to approximately, kind more than 1200, the bamboo kind and the bamboo grove area of China account for global 1/3rd, kind surplus the genus, 500 surplus the total bamboo plant 40, planting range spreads all over 27 provinces and regions, and the gross area reaches 7,200,000 hectares, produces bamboo wood per year above 2,000 ten thousand tons, occupy first place in the world, bamboo resource is described as second forest reserves of China.As a kind of environmental protection, continuable natural building material, being extensive use of of bamboo wood can economize on resources greatly, energy-saving and emission-reduction, improve environment.
Bamboo wood is a kind of organic-biological material, chemical composition is: cellulose 40%～60%, hemicellulose 14%～25%, lignin 16%～34% also has albumen 1.5%～6%, fatty glue cured 2%～4% in addition, starch based 2%～6%, reduced sugar is about 2%, nitrogen 0.21%～0.26%, ash content 1%～3.5%.
Bamboo wood is made of vascular bundle and book parietal cell, and vascular bundle is made up of bamboo fiber bundle and conduit.The variation of fascicular shape, size and density shows clear regularity in the bamboo stalk on same Zhu Bi cross section: from outside to inside, fascicular volume is ascending, slightly diminishes again during to the internal face of nearly tabasheer bamboo.And density by close to dredging, slightly become close again during nearly yellow bamboo face.By epidermis and hypodermic layer constitute the very strong bamboo stalk surface knowledge system-surf green of hardness-with the marrow ring-tabasheer that constitutes by the multi-layer thin parietal cell-the formed inside and outside double wall of bamboo stalk, vascular bundle and elementary organization closely are clipped in the middle, the character of bamboo wood has been played good stabilization.The parenchyma cell that is distributed between the vascular bundle is organized cushioning effect, to strengthen the elasticity and the toughness of bamboo wood.The lumen of parenchyma cell can be compressed simultaneously, and this microstructure of bamboo wood has determined that it is a kind of porous biological material, and is a kind of porous compressible material.To studies show that of bamboo wood radial compression creep behaviour, the creep behaviour that vigorous lattice model can be simulated the bamboo wood radial compression more exactly, its coefficient correlation reaches 90%; When vascular bundle process ring, variation has taken place in fiber orientation, and band joint bamboo wood its creep viscous deformation (being permanent deformation) amount increases.
The drying shrinkage of bamboo wood is the inherent defect on a kind of performance of causing of bamboo wood structure factor, it is very big to the processing and utilization influence of bamboo wood, the main cause of bamboo wood cracking is that the different parts contract with dry rate of same bamboo stalk is inconsistent, and same bamboo culm base subtracts to the dried contract with dry rate step of bamboo wood gas of taper the.Simultaneously, because of variety classes bamboo wood density difference, the contract with dry rate of variety classes bamboo wood also has bigger difference, studies show that the dried contract with dry rate of the gas of bamboo wood changes as follows: radially contract with dry rate 1.43%-2.12%, tangential shrinkage rate 1.13%-1.60%, volume contract with dry rate 3.28%-4.61%, its contract with dry rate is radially greater than tangential.
That bamboo wood and bamboo product are preserved under the temperature and humidity conditions of suitable human settlements and be easy to produce when using is rotten, go mouldy and damage by worms, institutional framework is changed, cause performances such as hardness, intensity to reduce greatly even lose, thereby research bamboo wood anti-corrosion characteristic and aseptic technic thereof are to rationally, utilize bamboo timber resource to have crucial meaning efficiently.
Rot fungi is ruined bamboo wood must possess key elements such as nutriment, moisture, temperature, humidity and air, and these several indispensable, otherwise growing of rot fungi will be suppressed death even.As long as therefore having controlled these several factors just can protect bamboo wood effectively.
The corrosion-resistant principle is in the production: removing the nutrient source in the bamboo wood or transforming nutrient source is unedible material, or cuts off required moisture and the air of rot fungi life.How the bamboo wood method for anticorrosion treatment that generally uses has comprehensively adopted physics and chemical preservation at present, mainly comprises fumigating system, normal pressure infusion process, spray-on process, brushing method, cold and hot channel process, adds (subtracting) pressure injection method, sap displacement and diffusion method etc.
1. physics anti-corrosion method
Methods such as physics rule such as water logging, baking, sootiness, high temperature drying, its processing cost is lower, and is simple to operate, general environmentally safe, but do not have lasting protectiveness.
2. chemical preservation method
Impregnate or the brushing bamboo wood with chemical agent, this is present the most frequently used bamboo wood anti-corrosion method, hinders the analytic metabolism of fungi with anticorrisive agent, synthetic as DNA, RNA, protein, lipoid, cell membrane, mitosis etc.
The advantage of chemical preservation is that favorable anti-corrosion effect, residual effect time are long than physical treatment process, and is still undesirable but complicated operation, processing cost height, durability and fixation rate are handled in chemical preservation.
Based on the similitude of bamboo wood and timber infringement bacterium, the anticorrisive agent that bamboo wood uses is used for reference mostly from timber.Generally be divided into gas anticorrisive agent, oils anticorrisive agent, oil year (molten) anticorrisive agent and water ballast (molten) anticorrisive agent.
Continue to use traditional timber preservative fully and can bring a series of problem.At first be environmental problem, anticorrisive agent produce and use in leakage and ooze out and bamboo timber discarded and burn and all can cause adverse effect after the preservative treatment, and the health of harm humans to environment.
Next is the adaptability problem of medicament, because there are very big-difference in timber and bamboo wood on anatomic construction and chemical composition, the handlability of bamboo wood is much smaller than timber, this permeance property to anticorrisive agent is had higher requirement, when particularly putting in order bamboo with the former bamboo of PROCESS FOR TREATMENT of handling timber, ftracture easily, medicament is difficult to even distribution.
In addition, the price of considering bamboo wood itself is relatively low, and with easily obtain, growth fast, fast build and environmental benefit as its important technology and economic characteristics, bamboo wood after anticorrosion modification should not destroy these characteristics, so anti-corrosion agent cost and must be controlled in the reasonable range cost and Environmental costs that bamboo wood is handled.
IPBC, chemical name: iodo propinyl butyl carbamate, 3-iodo-2-propynyl butyl carbamate, butyl carbamic acid 3-iodo-2-propynyl ester; English name: 3-iodo-2-propynyl-butyl-carbamate, molecular formula: C8H12O2NI, molecular weight: 281.09, fusing point: 65-68 ℃.Be novel powdery antimildew disinfectant, have fabulous bactericidal mould proof effect, be widely used in cosmetics, paint, coating, printing ink, leather, plastics, timber etc.IPBC extensively confirmed the hypotoxicity of human and environment, and its excellent biological compatibility makes it can very fast degraded in environment.
The group that has obvious sterilizing effect among the IPBC is the derivative of 1 one iodos, one low alkynes, and molecular formula is:
, R is one and replaces or unsubstituted alkyl, cycloalkyl, aromatic alkyl or arylated alkyl group in this molecular formula, this group has 1-20 carbon atoms, and to contain m key .m and n be integer between 1～3.
IPBC is powdery, and is water-soluble very poor, and the flow-like IPBC product that need be prepared as solvent-borne type or water-dispersion type uses.For example in the wood preservation, can pressure greater than 7.39MPa, temperature greater than 31.06 ℃ environment under, adopt the supercritical CO 2 fluid to carry flow-like IPBC timber carried out the preservative treatment of penetration formula.
Sodium acid carbonate (Sodium Bicarbonate) is a kind of inorganic foaming agent, proportion: 2.16; Molecular formula: NaHCO3; Molecular weight: 84.01; Molal weight 84.007 g/mol; Outward appearance: white crystal (Gu); Density: 2.159 g/cm; Generation sodium carbonate, carbon dioxide and water are decomposed in beginning gradually more than 50 ℃, lose whole CO2 during to 270 ℃.
The kinetic diameter of carbon dioxide is 0.33nm.
The sulfonyl hydrazines CBA is a kind of plastics blowing agent, wherein benzene sulfonyl hydrazide, unifor, 4,4 '-bis oxide benzene sulfonyl hydrazide all is pulverous low-temp foaming agent, its blowing temperature in plastics is between 80～160 ℃, use sodium acid carbonate can make its activation, reduce decomposition temperature.
Molecular diffusion is under the effect of concentration difference or other motive forces, because the caused material of warm-up movement of molecule, atom etc. is at the transport phenomena in space, being to cause that by molecular motion, interaction of molecules fluid reaches the process that wherein contains the random dispersion of thing and be tending towards local homogenizing, is a kind of basic mode that quality is transmitted.
The diffusion of fluid in porous media, be divided into volume diffusion, Michel Knuysen diffusion and transition region according to the pressure difference of size, shape and the fluid in duct and spread three class situations, the molecule of diffusion has interaction force all the time and between the duct of porous media, its motion in the duct is not only relevant with the concentration of temperature, molecule, and is subjected to the influence of duct shape and size very big.
Common have a loose structure, but and possess simultaneously that industrial economy is worth and the macromolecule expanded material of mechanics of materials feature mainly is foamed plastic and celluar concrete.
Foamed plastic also is porous plastics, is to be the distribute plastics of some micropores of inside that primary raw material is made with the resin.Light weight, thermal insulation, sound-absorbing, shockproof, corrosion-resistant.Nearly all thermosetting and thermoplastic can both be made foamed plastic, and resin commonly used has polystyrene, polyurethane, polyvinyl chloride, polyethylene, ureaformaldehyde, phenolic aldehyde etc.
Foamed plastic density is low, light weight, and the specific strength height can absorb shock loading, and good bumper and absorbing shock, sound insulating and absorbing, insulation and electrical insulation capability are arranged, and corrosion-resistant, anti-mould.
But foamed plastic also has the degraded of being difficult for, to the disagreeableness shortcoming of environment, particularly along with the developing rapidly of industry such as household electrical appliances, instrument, electronics, food, also increase rapidly as the consumption of EPS (polystyrene foam) plastics of antidetonation, insulation, packaging material.
Main EPS major part as packaging material is disposable use, with after promptly abandon, quantity is very big.These discarded object relative densities are little, and volume is big, are not easy to concentrate and transportation, and itself have characteristics such as ageing-resistant, anticorrosive, can not degrade voluntarily, are difficult to destroy, thereby become white garbage, serious environment pollution.
EPS is a thermoplastic, and common eps foam goods oxygen index (OI) 18.1 has inflammability, does not reach fire protection requirement, and the interpolation fire retardant is adopted in its fire-retardant processing more.But it is to carry out in EPS bead production process that fire retardant adds, and the non-flame retardant type EPS regeneration of reclaiming is added add fire retardant man-hour, and its product melting adhesivity is poor.
Static is ubiquitous a kind of natural phenomena in producing, living, and in the shattering process that reclaims EPS, can produce static, therefore need increase in the sharp useless technology of some EPS and eliminate the static operation.
When an object that has static near another not during the object of static electrification, because electrostatic induction, the interior of articles that does not have static can produce electric charge with the entrained opposite charge polarity of charged object near one side of static electrification object, opposite side produces the like charges of equal number, because the charges of different polarity are attracted each other, and will show " Electrostatic Absorption " phenomenon.
What celluar concrete was commonly used has three types, i.e. air entrained concrete, foam concrete and sand-free coarse porous concrete concrete.So-called air entrained concrete be meant with calcareous material (cement, lime), siliceous material (quartz sand, slag, flyash etc.) and air-entrainment (aluminium powder etc.) be raw material through levigate, prepare burden, pour into a mould, get angry, celluar concrete that operations such as cutting and steam press maintenance form;
Foamed concrete is to introduce an amount of micro-bubble in cement mortar or cement mortar, and the blown-out concrete of a large amount of pores is contained in a kind of inside that the back cast sclerosis that stirs forms.Foamed concrete comprises open cell type foamed concrete (can ooze the type foamed concrete) and obturator-type foamed concrete.
Because celluar concrete inside contains a large amount of bubbles, therefore to compare with normal concrete, celluar concrete has special superiority energy such as lightweight, insulation, heat insulation, sound insulation, and has low elastic modelling quantity, disperses and shock-absorbing performance thereby have good stress.
Cement is the main Binder Materials that constitutes concrete material, and Portland cement, sulphate aluminium cement, ferrous aluminate cement, magnesia oxychloride cement, volcano grey matter composite gelled material etc. all can be used as the Binder Materials of celluar concrete.
Celluar concrete is a kind of chutable concrete of the big ratio of mud, adopts Portland cement to make celluar concrete, and the theoretical water gray scale that cement is finished aquation is about 0.227, and remaining free water amount is big, and drying shrinkage is big.
When adopting aluminium sulfate and ferrous aluminate cement, the theoretical water gray scale that cement is finished aquation is about 0.447, the residue Free water is few, drying shrinkage is little, this two classes cement also has the characteristics of microdilatancy, can further remedy the big shortcoming of celluar concrete drying shrinkage, but aluminium sulfate and ferrous aluminate cement is as special cement, it costs an arm and a leg, output is little, it is wideless to distribute, and is difficult to popularize use.
Microwave is meant that frequency is the electromagnetic wave of 300MHz-300GHz, and microwave is meant to the fuel factor of organism that the biological tissue that caused by microwave or system are heated and physiological effect that organism is produced.The non-thermal effect of microwave is meant other effects except that fuel factor, as electrical effect, magnetic effect and chemical effect etc., under the effect of microwave electromagnetic field, some molecules in the organism will produce distortion and vibration, cell membrane function is affected, the electric situation of the inside and outside liquid of cell membrane is changed.Therefore, microwave is usually used in the drying and the sterilization of living beings material.
Heating using microwave efficient just depends primarily on the ability size of material absorption microwave in the system, and the dielectric constant ε r of different medium material is different with dielectric loss angle tangent tg δ, so the fuel factor under the microwave electromagnetic field action is also different.Graphite is a kind of outstanding microwave absorbing medium.Plastics then are the outstanding good media of microwave, and the microwave major part sees through, and therefore the fraction reflection does not have the heating using microwave of utilizing to make the method for foamed plastic at present.
Summary of the invention
For a kind of industrial economy value that has is provided, can be used as the anticorrosion modification bamboo wood that structural construction material uses, the invention discloses a kind of at former bamboo inner chamber through the blend of the composite filled microcellular structure high molecular foam material of second time of foaming with the iodo propinyl butyl carbamate, under design temperature and pressure environment, utilize fluid molecule in poromerics, to adsorb and dispersal behavior to the bamboo wood modification corrosion-resistant composite modified anticorrosion bamboo wood that foams.
The present invention's technical scheme that is adopted of dealing with problems is such:
The composite modified anticorrosion bamboo wood of a kind of foaming is characterized in that the manufacturing process of described bamboo wood is:
(1) is to use the material top diameter with harvested former bamboo by setting specification removal tip or getting 2/5 of the diameter of a cross-section of a tree trunk 1.3 meters above the ground, removes tip, clean and also connect ring postposition flowing water immersion 1-3D at this diameter;
Above-mentioned perforation ring technology is to adopt the drill bit reciprocating machine to connect, or mechanical perforation of mode one-way fashion of adopting high-velocity fluid to carry sand grains or spraying bullet;
Above-mentioned high-velocity fluid is high-velocity flow or high velocity air;
(2) former bamboo is carried out surface treatment;
Described surface treatment is that green processing is protected on surface physics preservative treatment, surface or surface colour is handled;
(3) polystyrene foam that reclaims is made the EPS particle that particle diameter is 2.5-5mm, bulk density 10-15kg/m3 through cleaning, fragmentation, screening;
Adopt the triboelectrification method or induce electrical method and make above-mentioned EPS particle charge surface density 〉=120 microcoulombs/square meter;
(4) IPBC, sodium acid carbonate, Powdered low temperature sulfonyl hydrazines CBA, aromatic bromide M, graphite are crushed and screened and makes the powder that 200 orders pass through, in gas-tight container according to EPS particle: IPBC: sodium acid carbonate: low temperature sulfonyl hydrazines CBA: the ratio of aromatic bromide M: graphite=1:0.05:0.05:0.02:0.01:0.03, blast dry air and mix, make IPBC, sodium acid carbonate, low temperature sulfonyl hydrazines CBA, aromatic bromide M, powdered graphite Electrostatic Absorption at the EPS particle surface;
Described Powdered low temperature sulfonyl hydrazines CBA is benzene sulfonyl hydrazide, unifor or 4,4 '-bis oxide benzene sulfonyl hydrazide;
(5) portland cement, lime, flyash, gypsum, swelling agent, early strength agent, foam stabilizer, hydrophober, IPBC, sodium acid carbonate, powdered graphite are mixed by a certain percentage, add water and stir 5min, make the open cell type foam concrete of unit weight 500kg-800kg/m3 with the compressed air foam method, wherein IPBC accounts for 0.5%-2%, the 0.5%-1% that sodium acid carbonate accounts for total proportion, the 2%-5% that powdered graphite accounts for total proportion of total proportion
(6) the EPS particle of step 4 being made is mixed in the foam concrete that step 5 makes, and stirs, and makes the flow-like open cell type eps foam concrete of unit weight 150kg-300kg/m3;
The open cell type eps foam concrete cast of (7) step 6 being made is filled into the former bamboo inner chamber that step 1 is made, and seal closure, plug is set at former bamboo two ends or applies gastight adhesive;
Described gastight adhesive is PUR, pitch, silica gel or glass cement;
Former bamboo is set in above-mentioned cast filling process becomes 30-60 ° of angle with horizontal plane, and slowly rotate along former bamboo axis;
(8) begin in the described foam concrete initial set of step 7, during final set finishes, in the environment of 800-900hPa, the compound foamed bamboo heating using microwave 20 min-120 min that adopt the microwave of wavelength 103-105 μ m that step 7 is made;
Reduce temperature to normal temperature, keep flat at ventilated environment and leave standstill maintenance 28D.
By above-mentioned steps, the invention discloses a kind of Electrostatic Absorption method of using and add the modification anticorrosion bamboo wood of powdered graphite as the microwave second time of foaming sterilizing and drying manufactured of microwave absorbing medium.
Above-mentioned microwave second time of foaming sterilizing and drying method is by changing microwave heating time and the external ambient atmosphere pressure foam structure with the control foaming, change sodium acid carbonate, low temperature sulfonyl hydrazines CBA powder diameter to control the abscess aperture of foaming, change sodium acid carbonate, low temperature sulfonyl hydrazines chemical blowing agent dose to control the cell density of foaming.
The invention has the beneficial effects as follows, a kind of industrial economy value that has is provided, can be used as the anticorrosion modification bamboo wood that structural construction material uses, have good corrosion-resistant, anti-mould and weatherability, significantly improved the physical property of bamboo wood and can process, connectivity, reduced the contract with dry rate and the combustibility of bamboo wood, processing technique equipment is simple, raw material obtains easily, production cost is low, and sharp useless, environmental protection, energy-conservation, lightweight are a kind of green ecological building materials that are easy to promote.
The invention will be further described below in conjunction with embodiment:
The specific embodiment:
The composite modified anticorrosion bamboo wood of a kind of foaming is characterized in that the manufacturing process of described bamboo wood is:
(1) is to use the material top diameter with harvested former bamboo by setting specification removal tip or getting 2/5 of the diameter of a cross-section of a tree trunk 1.3 meters above the ground, removes tip, cleaning and connect the rearmounted flowing water immersion of ring 1-3D at this diameter;
In an embodiment, described flowing water is clear water or limewash, and its purpose is stripping part water-soluble nutrient substance, and makes the cells fill Free water cause anaerobic environment;
Above-mentioned perforation ring technology is to adopt the drill bit reciprocating machine to connect, or mechanical perforation of mode one-way fashion of adopting high-velocity fluid to carry sand grains or spraying bullet;
Above-mentioned high-velocity fluid is high-velocity flow or high velocity air;
In an embodiment, small-scale bamboo wood is anticorrosion to adopt artificial drill bit reciprocating machine to connect, and equipment is simple, easy construction;
Among the embodiment, large-scale bamboo wood is anticorrosion to adopt the high-velocity fluid of streamline to carry sand grains or the mode one-way fashion machinery that sprays bullet connects, with perforation ring rapidly and efficiently, the high-velocity fluid mode that sand grains is carried in employing connects all right slight damage bamboo wood inner chamber tabasheer epidermis of ring, favourable next step anticorrisive agent penetration operation;
(2) former bamboo is carried out surface treatment;
Described surface treatment is that green processing is protected on surface physics preservative treatment, surface or surface colour is handled;
Among the embodiment, the preservative treatment of described bamboo wood surface physics is baking, dipping, spraying or brushing to be done in the bamboo wood surface handle;
Among the embodiment, it is that the magnesium ion displacement method is protected green or nanometer Ti02 sol-gel process is protected green that green processing is protected on described bamboo wood surface;
Among the embodiment, described bamboo wood staining handle be that deep fat is painted, non-flammable compressive gas adds heat colouring, charing is painted closes that acid treatment is painted, acid treatment is painted or dye painted;
(3) polystyrene foam that reclaims is made the EPS particle that particle diameter is 2.5-5mm, bulk density 10-15kg/m3 through cleaning, fragmentation, screening;
Technique scheme discloses the composite modified anticorrosion bamboo wood of foaming that utilizes the polystyrene foam making of reclaiming, and in an embodiment, thermosetting or thermoplastic expanded plastics all can make the composite modified anticorrosion bamboo wood of foaming by the inventive method;
Adopt the triboelectrification method or induce electrical method and make above-mentioned EPS particle charge surface density 〉=120 microcoulombs/square meter;
In an embodiment, the EPS particle is in the Mechanical Crushing process, and triboelectrification is finished or finished synchronously so the described fragmentation of step 3 and the operation that electrifies are substeps;
(4) IPBC, sodium acid carbonate, low temperature sulfonyl hydrazines CBA, aromatic bromide M, graphite are crushed and screened make the powder that 200 orders pass through, in gas-tight container according to EPS particle: IPBC: sodium acid carbonate: low temperature sulfonyl hydrazines CBA: the ratio of aromatic bromide M: graphite=1:0.05:0.05:0.02:0.01:0.03, blast dry air and mix, make IPBC, sodium acid carbonate, low temperature sulfonyl hydrazines CBA, aromatic bromide M, powdered graphite Electrostatic Absorption at the EPS particle surface;
(5) portland cement, lime, flyash, gypsum, swelling agent, early strength agent, foam stabilizer, hydrophober, IPBC, sodium acid carbonate, powdered graphite are mixed by a certain percentage, add water and stir 5min, make the open cell type foam concrete of unit weight 500kg-800kg/m3 with the compressed air foam method, wherein IPBC accounts for 0.5%-2%, the 0.5%-1% that sodium acid carbonate accounts for total proportion, the 2%-5% that powdered graphite accounts for total proportion of total proportion
(6) the EPS particle of step 4 being made is mixed in the foam concrete that step 5 makes, and stirs, and makes the flow-like open cell type eps foam concrete of unit weight 150kg-300kg/m3;
The open cell type eps foam concrete cast of (7) step 6 being made is filled into the former bamboo inner chamber that step 1 is made, and seal closure, plug is set at former bamboo two ends or applies gastight adhesive;
Described gastight adhesive is PUR, pitch, silica gel or glass cement;
In an embodiment, in the cast filling process former bamboo is set and becomes 30-60 ° of angle with horizontal plane, can reduce the influence of piling height bottom layer foam;
In an embodiment, bamboo wood slowly rotates along its axis in the cast filling process;
In an embodiment, the concrete cast filling of eps foam is to utilize gravity-assist pouring or utilize compressed air to fill;
(8) during the described foam concrete initial set of step 7 begins final set and finishes, in the environment of 800-900hPa, the compound foamed bamboo heating using microwave 20 min-120 min that adopt the microwave of wavelength 103-105 μ m that step 7 is made;
Reduce temperature to normal temperature, keep flat at ventilated environment and leave standstill maintenance 28D;
By above-mentioned steps, the invention discloses a kind of Electrostatic Absorption method of using and add the modification anticorrosion bamboo wood of powdered graphite as the microwave second time of foaming sterilizing and drying manufactured of microwave absorbing medium.
The anticorrosion bamboo wood of described modification is comprehensively to adopt physics and chemical preservation, moisture and air with the isolated bamboo wood inner chamber of microcellular structure high molecular foam material, utilize diffusion and the absorption principle of molecule in porous structural material simultaneously, improve the durability and the fixation rate of anticorrisive agent.
Inner chamber is filled the bamboo wood of microcellular structure high molecular foam material, can reduce the contract with dry rate of bamboo wood, and in former bamboo drying shrinkage process, bamboo wood shrinks creep, its tube wall surface produces compression, the inner tensile stress that produces of microcellular structure high molecular foam material, thereby the physical strength of raising bamboo wood.
In an embodiment, behind the heating using microwave 30 min-60 min, IPBC, sodium acid carbonate, low temperature sulfonyl hydrazines CBA, aromatic bromide M are all reached decomposition temperature what step 4, step 5 were added.In this process, powder is as the microwave absorbing medium, under electromagnetic field effect, molecule is from the polarity oriented of original random distribution state shift according to electric field, and friction generates heat, sodium acid carbonate, low temperature sulfonyl hydrazines CBA decompose generation gas, make the foaming of eps foam concrete secondary;
Meanwhile, above-mentioned gas carries the analyte of IPBC and aromatic bromide M, in the environment under low pressure of 800-900hPa, move by molecular diffusion, enter the bamboo fiber interfascicular of microcellular structure, produce chemical reaction and physical absorption, in an embodiment, by can be observed the colour developing phenomenon in the bamboo wood of handling, can illustrate that IPBC decomposes the iodine of generation and the starch in the bamboo wood has produced chemical reaction; In an embodiment, bamboo wood after employing Fourier infrared spectrum method (FTIR) analyzing and processing, variation has taken place near the absworption peak of its infrared spectrum 2850cm-1,1500cm-1,900cm-1, and the infrared spectrum of the preservative treatment material after the drip washing is basic identical with the infrared spectrogram of the preceding bamboo wood that is untreated, and does not have new absworption peak to occur.This has shown that bamboo wood and IPBC anticorrisive agent are to keep in bamboo wood by physisorption, have kept and IPBC anticorrisive agent structural intergrity and antiseptic property;
In an embodiment, with reference to ASTMD1413-76 " laboratory method estimate timber preservative effect " to the bamboo composite modified anticorrosion bamboo wood of foaming that becomes of growing thickly with mao bamboon, oily muscle bamboo, bambusa sinospinosa, the huge bamboo of Vietnam and 5 kinds big footpaths of sinocalamus latiflorus, every kind of bamboo wood is chosen root, stage casing and 3 groups of samples of taper and is tested, and handles material and has all reached strong corrosion resistant grade (weight-loss ratio＜10%);
In an embodiment, according to GB/T15780.1995 " Testing methods for physical and mechanical properties of bamboos ", substitute the test specimen of setting in " Testing methods for physical and mechanical properties of bamboos " with former bamboo and measure, the tangential bending strength of the former bamboo of the composite modified anticorrosion bamboo wood of the foaming after the processing, tangential bending resistance elastic modelling quantity, parallel-to-grain compressive strength, tensile strength parallel to grain, five mechanical properties of shearing-strength of wood along the grain all are significantly increased;
In an embodiment, the bamboo wood through protecting green processing can keep the bamboo wood primary colors by heating using microwave 20 min-30 min; In an embodiment, change microwave heating time and external ambient atmosphere pressure and can control the foam structure of foaming, change sodium acid carbonate, low temperature sulfonyl hydrazines CBA powder diameter can be controlled the abscess aperture of foaming, and change sodium acid carbonate, low temperature sulfonyl hydrazines chemical blowing agent dose can be controlled the cell density of foaming.
In an embodiment, the effect of sterilization, drying is also played in heating using microwave, and helps the hydration reaction of foam concrete;
Above embodiment is the unrestricted technical scheme described in the invention in order to explanation the present invention only; Therefore, though this specification describes in detail the present invention with reference to the foregoing description, one of ordinary skill in the art is appreciated that still and can makes amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the invention, and it all should be encompassed among the claim scope of the present invention.
Claims (4)
- One kind the foaming composite modified anticorrosion bamboo wood, it is characterized in that the manufacturing process of described bamboo wood is:(1) harvested former bamboo is removed tip and clean and connect the rearmounted flowing water immersion of ring 1-3D;(2) former bamboo is carried out surface treatment;Described surface treatment is that green processing is protected on surface physics preservative treatment, surface or surface colour is handled;(3) polystyrene foam that reclaims is made the EPS particle that particle diameter is 2.5-5mm, bulk density 10-15kg/m3 through cleaning, fragmentation, screening;Adopt the triboelectrification method or induce electrical method and make above-mentioned EPS particle charge surface density 〉=120 microcoulombs/square meter;(4) IPBC, sodium acid carbonate, Powdered low temperature sulfonyl hydrazines CBA, aromatic bromide M, graphite are crushed and screened and makes the powder that 200 orders pass through, in gas-tight container according to EPS particle: IPBC: sodium acid carbonate: low temperature sulfonyl hydrazines CBA: the ratio of aromatic bromide M: graphite=1:0.05:0.05:0.02:0.01:0.03, blast dry air and mix, make IPBC, sodium acid carbonate, low temperature sulfonyl hydrazines CBA, aromatic bromide M, powdered graphite Electrostatic Absorption at the EPS particle surface;(5) portland cement, lime, flyash, gypsum, swelling agent, early strength agent, foam stabilizer, hydrophober, IPBC, sodium acid carbonate, powdered graphite are mixed by a certain percentage, add water and stir 5min, make the open cell type foam concrete of unit weight 500kg-800kg/m3 with the compressed air foam method, wherein IPBC accounts for 0.5%-2%, the 0.5%-1% that sodium acid carbonate accounts for total proportion, the 2%-5% that powdered graphite accounts for total proportion of total proportion;(6) the EPS particle that step (4) is made is mixed in the foam concrete that step (5) makes, and stirs, and makes the flow-like open cell type eps foam concrete of unit weight 150kg-300kg/m3;The open cell type eps foam concrete cast of (7) step (6) being made is filled into the former bamboo inner chamber that step (1) is made, and seal closure, plug is set at former bamboo two ends or applies gastight adhesive;(8) during the described foam concrete initial set of step (7) begins final set and finishes, in the environment of 800-900hPa, the compound foamed bamboo heating using microwave 20 min-120 min that adopt microwave that step (7) is made;Reduce temperature to normal temperature, keep flat at ventilated environment and leave standstill maintenance 28D.
- 2. the composite modified anticorrosion bamboo wood of a kind of foaming according to claim 1 is characterized in that, the composite modified anticorrosion bamboo wood of described foaming is to use the Electrostatic Absorption method to add powdered graphite as the microwave second time of foaming sterilizing and drying manufactured of microwave absorbing medium.
- 3. the composite modified anticorrosion bamboo wood of a kind of foaming according to claim 1, it is characterized in that, change microwave heating time and external ambient atmosphere pressure foam structure with the control foaming, change sodium acid carbonate, low temperature sulfonyl hydrazines CBA powder diameter to control the abscess aperture of foaming, change sodium acid carbonate, low temperature sulfonyl hydrazines chemical blowing agent dose to control the cell density of foaming.
- 4. the composite modified anticorrosion bamboo wood of a kind of foaming according to claim 1 is characterized in that, described Powdered low temperature sulfonyl hydrazines CBA is benzene sulfonyl hydrazide, unifor or 4,4 '-bis oxide benzene sulfonyl hydrazide.
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| CN108724388A (en) * | 2018-06-12 | 2018-11-02 | 阜南县创发工艺品有限公司 | A kind of willow craftwork processing etching liquid |
| WO2021057497A1 (en) * | 2019-09-23 | 2021-04-01 | 深圳麦克韦尔科技有限公司 | Baking object, method for fabrication of baking object, and method for microwave heating of baking object |
| CN113635408A (en) * | 2021-08-28 | 2021-11-12 | 仁化县奥达胶合板有限公司 | Antibiotic environmental protection ply bamboo |
| CN114800745A (en) * | 2022-05-06 | 2022-07-29 | 浙江省林业科学研究院 | Manufacturing method of strong corrosion-resistant/mildew-proof bamboo recombined material |
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| CN1919699A (en) * | 2005-08-25 | 2007-02-28 | 泓齐科技有限公司 | Wooden container and its making method |
| CN101294354A (en) * | 2008-02-29 | 2008-10-29 | 华南理工大学 | Heat insulation sound absorption material with green environment protection function, prepraring method and apparatus thereof |
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| CN1919699A (en) * | 2005-08-25 | 2007-02-28 | 泓齐科技有限公司 | Wooden container and its making method |
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| CN113635408A (en) * | 2021-08-28 | 2021-11-12 | 仁化县奥达胶合板有限公司 | Antibiotic environmental protection ply bamboo |
| CN113635408B (en) * | 2021-08-28 | 2022-05-24 | 仁化县奥达胶合板有限公司 | Antibiotic environmental protection ply bamboo |
| CN114800745A (en) * | 2022-05-06 | 2022-07-29 | 浙江省林业科学研究院 | Manufacturing method of strong corrosion-resistant/mildew-proof bamboo recombined material |
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| CN102189580B (en) | 2013-05-08 |
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