CN105690495A

CN105690495A - Formaldehyde-free type building structure bamboo wood with spice slow release function

Info

Publication number: CN105690495A
Application number: CN201610128703.1A
Authority: CN
Inventors: 焦伟丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-03-08
Filing date: 2016-03-08
Publication date: 2016-06-22

Abstract

The invention discloses formaldehyde-free type building structure bamboo wood with a spice slow release function. The bamboo wood is technically characterized in that the formaldehyde-free type building structure bamboo wood with the spice slow release function is formed by layered overlaying of at least two layers of unfolded bamboo wood recombination plastic poly veneer, macromolecule resin compounds are used for performing stem grafting on fiber lignin in the bamboo wood, and through high temperature and high pressure, the macromolecule resin compounds and the bamboo wood plastic poly veneer form an integrated body under the thermal melting state; and when the unfolded bamboo wood recombination plastic poly veneer is subject to layered overlaying, tabasheer layers are opposite, and bamboo green layers are opposite. The bamboo wood yield is improved, the working efficiency is improved, the cost of a unit product is reduced, the mechanical property of the bamboo wood is fully kept, the recombination plastic poly bamboo wood is filled with macromolecule resin, the bamboo wood is modified, and the material becomes an environment-friendly material suitable for a building structure.

Description

A kind of building structure bamboo wood of type without aldehyde with slow release spice function

Technical field

The invention belongs to building material technical field, be specifically related to a kind of formaldehydeless bamboo wood restructuring and mould poly-structural lumber。

Background technology

Bamboo wood has goodish mechanical property, and for intensity and cost, bamboo is considered as the material that in nature, usefulness is the highest。The tensile strength of bamboo wood is about 2 times of timber, and comprcssive strength is 1.5 times of timber, and the specific strength of bamboo wood is higher than timber and common iron, and therefore, bamboo wood possesses the good basis condition as structural lumber。If being developed as building structural materials, just can widen the bamboo wood purposes at building field, for promoting a kind of effective way of utilization developing of bamboo resource。Up to the present, bamboo wood also rests essentially within the application of indoor house ornamentation, knickknack, exterior decoration and building template, is not yet used as structural lumber。The tension of bamboo wood, compressive mechanical property are not fully played, and the excellent mechanical property of bamboo wood self is especially suitable for structural panel and the single load bearing structural member materials such as the additive beam slab in development architecture structure, post, body of wall。

Although bamboo be that nature exists a kind of typical, there is the organism of good mechanical property。Its intensity height, good springiness, stable performance, and density is little。Structures shape mechanical property, bamboo organism structure to bear self quality and growing environment load, very long evolutionary process makes structure have excellent mechanical property。But, bamboo is the hollow Cylinder of minor diameter, all can not meet the construction requirement of modern construction engineering structure from shape to performance。It is intended to it can be used as structural lumber to use, it is necessary to former bamboo carries out reshaping, modifiies, produce the sheet material and section bar that are suitable for modern construction engineering constructional techniques。At present, recombining bamboo, lamination bamboo wood press capacity meet require in situation, thicker slab can be obtained, then the square bars such as various sizes of beam, post it are cut into again, the compacting of this artificial bamboo board is to need significantly high pressure could obtain enough intensity, therefore product density is relatively big, raw materials consumption is more, and production cost is high。And, they in the fabrication process, the plane milling of the fiber biological amount of bamboo wood is more, and inner tissue's structure of bamboo wood has suffered destruction, and its intensity is not in full use。Meanwhile, have employed the resin glue with formaldehyde composition, with the addition of harmful chemicals composition to environmental type bamboo wood, the manufacture creating material is polluted, and is not suitable for use in house architectural structure material, is harmful to the healthy of people。

The structure of bamboo is the more typical lightweight structure of ratio existed in nature, gives people and designs the inspiration that bamboo matter building structure light sectional material is useful。Simultaneously as the demand of timber structure section bar is increased by current China day by day, and timber resources lacks relatively, and under timber supply and demand contradiction intense situation increasingly, " wood substituted by bamboo " accelerates development environmental type bamboo matter structural lumber, will have important practical significance。

Additionally, existing bamboo wood for building does not have effect of slow release fragrance, it is impossible to meet the market demand, this problems demand solves。

Summary of the invention

It is an object of the invention to provide and a kind of bamboo wood is launched restructuring mould poly-veneer as surface layer, sandwich layer and bottom, and there is the building structure bamboo wood of type without aldehyde with slow release spice function of higher intensity。

The above-mentioned purpose of the present invention realizes by the following technical solutions: this has the building structure bamboo wood of type without aldehyde of slow release spice function, it is launched bamboo wood restructuring by least two-layer and moulds the layering superposition of poly-veneer, with the cellulignin in macromolecule resin grafting compounds bamboo wood, by High Temperature High Pressure, make macromolecule resin compound mould combinate form under hot melt state with bamboo wood and become an intergrant；When the layering superposition of poly-veneer is moulded in expansion bamboo wood restructuring, Concretio silicea Bambusae seu schizostachyi layer is relative with Concretio silicea Bambusae seu schizostachyi layer, and bamboo green layer is relative with bamboo green layer；

It is filled with hollow metal sphere in described bamboo green layer, is provided with spice in described hollow metal sphere, the housing of described hollow metal sphere is evenly distributed with through hole。

Concrete, it is removed bamboo internal segment by arc bamboo sheet that poly-veneer is moulded in the restructuring of described expansion bamboo wood, Concretio silicea Bambusae seu schizostachyi layer longitudinally cut open split, bamboo green layer is connected, flatten, fixed thickness just digs the cured layer of bamboo strip and yellow bamboo face, and carrying out bamboo wood preplasticizing modification and macromolecule resin compound is mated formation the bamboo chip after processing, yellow bamboo face is the same face, bamboo strip is the veneer that the same face, side are close to close proper alignment mutually。

Further, described bamboo wood preplasticizing modification is coupling agent, cross-linking agent and lignin fibre binder solution to be sprayed on the bamboo fiber lignin surface of dried bamboo chip so that it is be sufficiently humidified so as to and degeneration；It is macromolecule resin compound of mating formation on the yellow bamboo face of bamboo chip after bamboo wood preplasticizing modification that described macromolecule resin compound is mated formation, and makes resin compound enter in crackle gap by the mode of vibration。

Concrete, this structural lumber thickness is 14-50mm, and length is 2600-4800mm, and width is 200-1200mm。

The know-why of the present invention is mainly:

Bamboo wood preplasticizing modification process, it is to bamboo wood spraying coupling agent, cross-linking agent and lignin fibre binder solution, coupling agent, cross-linking agent and lignin fibre binder solution and bamboo fiber lignin carry out biochemical reaction, reach chemical reaction under certain environmental conditions to complete, bamboo wood dried or dries, obtaining the modified bamboo wood of preplasticizing after drying。Coupling agent can improve the powerful linking to base material, and main amine functional group can with a series of thermosetting resins and thermoplastic generation grafting effect。

The natural macromolecular material that bamboo wood is made up of cellulose, hemicellulose, lignin and extract etc., it is a kind of uneven anisotropic material, and therefore interfacial characteristics is extremely complex。Form in the key components such as the cellulose of bamboo wood, hemicellulose, lignin containing the functional group such as substantial amounts of polar hydroxyl groups and phenolic hydroxyl group simultaneously, its surface exhibits goes out significantly high chemical polarity, thus on bamboo fiber surface mainly through polar functional group is esterified, etherificate, the modification such as graft copolymerization, it is made to generate hydrophobic nonpolar chemical functional group and have mobility, make bamboo fiber surface similar to the dissolubility of macromolecule resin frosting, reduce the repellence between plastics and bamboo material surface, thus improving the interfacial adhesion of bamboo wood and plastics。The preplasticizing of bamboo fiber surface modifiies the effect of mainly coupling agent, improves the compatibility on bamboo fiber surface and plastic interface, improves the cohesive at two interfaces。

Cellulignin is one of main component of bamboo culm wall, cell wall can make bonding and reinforcing between fiber and fiber in the way of physically or chemically, and constitute the skeleton of bamboo wood, with the ability that the mechanical strength and antimicrobial increasing bamboo wood corrodes, make bamboo pole uprightly tall and straight not perishable。

Cellulignin is thermoplastic macromolecular compound, containing feature functionality groups such as methoxyl group, carbonyl, carbonyls on its state of aggregation macromole。It has the gamma transition character of unbodied high polymer, and below vitrification point, lignin is glass solid-state, if but more than vitrification point, molecular link moves, and lignin softening becomes sticky, and has viscous force。Bamboo fiber lignin glass transition temperature point is 162 DEG C。

Bamboo wood carries out preplasticizing and processes the hydrogen bond repulsive interaction exactly eliminating between bamboo fiber lignin molecule, weaken bamboo fibre lignin-base because of in methoxyl group (-OCH₃), hydroxyl (-OH), carbonyl (-C=O) polarity, improve the interface between cell wall and lumen, make the original doping region of bamboo wood be transformed into nonpolar district, can effectively with resin congruent melting, production process does not need binding agent。

The technique effect of the present invention is mainly:

The former bamboo of present invention area in blocks is big, and it is few that thick bamboo tube cuts open sheet number, arc bamboo sheet be launched into planar shaped bamboo chip force plane, and bamboo cutting amount is greatly reduced, and reduces manufacturing procedure, it is not necessary to bamboo chip adjustable cast iron planes is processed；Improve bamboo wood volume recovery, original technique bamboo wood volume recovery only has about 50%, and the present invention retains the effective quantity of goods produced of bamboo wood to greatest extent, and bamboo wood volume recovery improves 80%；Because area in blocks is big, operation is few, and personnel reduce, and equipment work efficiency is high, reduces the cost of unit product；Because arc bamboo sheet is launched into planar shaped bamboo chip milling, it is more than former technique that bamboo green layer retains quantity of goods produced, maintains the mechanical property of bamboo wood fully；The present invention adopts macromolecule resin to fill restructuring and moulds poly-bamboo wood, makes bamboo wood modifiy, and material becomes the applicable building structure material of environment-friendly type。

It is that a kind of three-dimensional moulds poly-composite structure that the present invention has the building structure Culm of type without aldehyde of slow release spice function。This material structure, with natural Phyllostachys pubescens Mazei ex H.de Lebaie for main load-carrying member, adds macromolecule resin filling materials, additive etc., moulds poly-a kind of novel three-dimensional composite with special process process。In material structure, bamboo wood is main load-carrying member, and macromolecule resin plays the effects such as filling, attractive in appearance, decoration, mothproof, molding, and additive plays the functions such as bonding, strengthening node。This structure has three-dimensional potentiation, good combination, branch and reinforcing function, can reach wood substituted by bamboo, with bamboo for steel, substitutes the purpose of other material, is with a wide range of applications。The present invention has good fragrance slow release effect, it is possible to discharge fragrance slowly, makes the fragrance that indoor preservation is certain, is also beneficial to reduce the bad smell in the house after finishing。

Accompanying drawing explanation

Fig. 1 is the structural representation that poly-veneer is moulded in bamboo wood of the present invention restructuring。

Fig. 2 is the structural representation that poly-structural lumber is moulded in bamboo wood of the present invention restructuring。

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is described in further detail。

Referring to Fig. 1, it it is the bamboo wood of the present invention restructuring structural representation of moulding poly-veneer。As can be seen from Fig. 1, it is removed bamboo internal segment by arc bamboo sheet that poly-veneer is moulded in the restructuring of this expansion bamboo wood, Concretio silicea Bambusae seu schizostachyi layer longitudinally cut open split, bamboo green layer is connected, flatten, just the plane cured layer of bamboo strip and yellow bamboo face, to be processed into fixed width fixed thick and carry out bamboo wood preplasticizing modification and macromolecule resin compound is mated formation the bamboo chip 1 after processing, then be the same face, bamboo strip by the yellow bamboo face of bamboo chip 1 is the veneer that the same face, side are close to close proper alignment mutually；In Fig. 1,2 is the ring of bamboo chip 1, and 3 represent the macromolecule resin compound penetrating in bamboo chip 1。It is filled with hollow metal sphere in described bamboo green layer, is provided with spice in described hollow metal sphere, the housing of described hollow metal sphere is evenly distributed with through hole。

It is as follows that the technical process of poly-veneer is moulded in the bamboo wood restructuring of the present invention: after the thick bamboo tube become length to be 2600-5000mm former bamboo sawing, by thick bamboo tube Vertical sawing machine or collide and cut open into two pieces of arc bamboo sheets, removes bamboo internal segment；Cut open Concretio silicea Bambusae seu schizostachyi then through bamboo wood roller to discongest milling machine bamboo wood yellow bamboo face cuts open the longitudinal crack being cleaved between 4-5mm, Concretio silicea Bambusae seu schizostachyi surface layer cuts open and splits the degree of depth from bamboo strip 3-4mm, form Concretio silicea Bambusae seu schizostachyi surface layer and longitudinally uniformly analyse some tiny bamboo fiber bundle bars, and bamboo green layer not obtain analysing be a complete body, tiny Concretio silicea Bambusae seu schizostachyi bamboo fiber bundle bar, it is retained on bamboo green layer, form former bamboo wood Concretio silicea Bambusae seu schizostachyi layer to cut open to split and discongest bamboo wood, the interconnection of outer wall bamboo green layer is a monoblock when launching, and Concretio silicea Bambusae seu schizostachyi layer depends on the bamboo wood cell cube after bamboo green layer forms an expansion。Then by fixed thick for bamboo wood cell cube milling Huang planing, carry out the soft plastics processing of high temperature, dry, bamboo wood preplasticizing modification, dry again, macromolecule resin compound of mating formation becomes the bamboo chip 1 shown in Fig. 1, then bamboo chip 1 screening compacting restructuring is moulded the veneer being polymerized to shown in Fig. 1。

Referring to Fig. 2, it it is the bamboo wood of the present invention restructuring structural representation of moulding poly-structural lumber。As seen from Figure 2, it is that the layering superposition of poly-veneer is moulded in the expansion bamboo wood restructuring shown in four layers of Fig. 1 that poly-structural lumber is moulded in bamboo wood restructuring, with the cellulignin in macromolecule resin grafting compounds bamboo wood, by High Temperature High Pressure, make macromolecule resin compound mould combinate form under hot melt state with bamboo wood and become an intergrant；When the layering superposition of poly-veneer is moulded in expansion bamboo wood restructuring, Concretio silicea Bambusae seu schizostachyi layer is relative with Concretio silicea Bambusae seu schizostachyi layer, and bamboo green layer is relative with bamboo green layer。

The technical process that bamboo wood restructuring is moulded poly-structural lumber below is described in detail。

(1) after former bamboo sawing becomes the thick bamboo tube of scale lengths, thick bamboo tube is split into two pieces of arc bamboo sheets, removes bamboo internal segment；The length of arc bamboo sheet is 2600-5000mm；

(2) bamboo chip yellow bamboo face is discongested into the longitudinal crack fibre bundle bar of 4-5mm spacing, yellow bamboo face cuts open and splits depth distance bamboo strip 3-4mm, form Concretio silicea Bambusae seu schizostachyi ribbon and be retained on bamboo green layer, form former bamboo Concretio silicea Bambusae seu schizostachyi layer and cut open and split the bamboo chip discongested, the planing of Ding Hou milling Neihuang County, just the plane cured layer of bamboo strip；

(3) carry out that high temperature is soft moulds process to discongesting bamboo chip；

(4) bamboo chip dehydrate, moisture content is 8%。

(5) bamboo chip preplasticizing modification: i.e. bamboo material surface cellulignin modification, is that hydrophilic bamboo fiber lignin is carried out surface modification treatment, to improve its binding ability with macromolecule resin compound；

(6) the modified bamboo chip of dry preplasticizing: temperature controls at 55-60 DEG C, and moisture content is 8%；

(7) being mated formation by macromolecule resin compound filling bamboo chip, screening assembly, reheating compression moulding is polymerized to type, cutting edge, recombinates laminated timber finally according to purposes hot pressing；The building structure bamboo wood thickness of type without aldehyde with slow release spice function obtained is 14-50mm, and length is 2600-4800mm, and width is 200-1200mm, and specific bamboo wood is not limited, can determine according to demand。

The soft treatment process condition of moulding of high temperature in above-mentioned steps is: bamboo wood is sealing in pressure still, and temperature 130 DEG C-135 DEG C processes 3-40 minute。

Bamboo material surface cellulignin modification in above-mentioned steps is: by dried bamboo chip, it is sprayed on bamboo fiber lignin surface with coupling agent, cross-linking agent and lignin fibre binder solution, make it be sufficiently humidified so as to and degeneration, its modifying surface is processed；In coupling agent, cross-linking agent and lignin fibre binder solution, adopt the blend solution of novel silane coupler (an isocyanates propyl-triethoxysilicane) 2% (mass percentage concentration), cross-linking agent (dimethyl ethylene glycol) 2.5% (mass percentage concentration) and lignin fibre binding agent 0.5% (mass percentage concentration)。

Macromolecule resin compound in above-mentioned steps is mated formation and is: macromolecule resin compound of mating formation on the yellow bamboo face of preplasticizing bamboo chip, makes resin object enter in crackle gap by the mode of vibration；Mixing in resin and accounting for resin quality percentage composition is the foaming agent (azodicarbonamide) of 2.5%；Described macromolecule resin compound is polyvinylchloride, polythene PE, polystyrene PS, ABS copolymer resins and resin moulded by wood, bamboo moulds any one in resin。

Screening assembly in above-mentioned steps is, the bamboo chip cell cube handled well of being mated formation by macromolecule resin compound, and by symmetry principle, yellow bamboo face is the same face, bamboo strip is that the same face, wide head match with narrow head, and side is close to close fitly arrangement mutually and forms Bamboo veneer；Bamboo veneer is layered superposition, Concretio silicea Bambusae seu schizostachyi layer be relative with Concretio silicea Bambusae seu schizostachyi layer again, bamboo green layer and bamboo green layer form lamination blanket relatively。

It is that the lamination blanket formed after screening assembly is carried out following PROCESS FOR TREATMENT that hot compression molding in above-mentioned steps gathers restructuring:

A () thermoplastic pre-pressing stage: the time is 3-4 minute, normal pressure is 1.6Mpa, and lateral pressure is 1.5Mpa, and temperature is 140 DEG C；

(b) secondary compaction stage: when bamboo wood and resin compound soften, when reaching glass transition condition, again increasing pressure, blanket normal pressure is 3.6Mpa, and lateral pressure is 3.1Mpa, and temperature is 170 DEG C, and the time presses every millimeter of calculating in 0.45 minute；

(c) last decrease temperature and pressure sizing stage: the time is 3 minutes, and normal pressure is 1.8Mpa, and lateral pressure is 1.6Mpa, and temperature drops to 95 DEG C。

Claims

1. the building structure bamboo wood of type without aldehyde with slow release spice function, it is characterized in that: it is launched bamboo wood restructuring by least two-layer and moulds the layering superposition of poly-veneer, with the cellulignin in macromolecule resin grafting compounds bamboo wood, by High Temperature High Pressure, make macromolecule resin compound mould combinate form under hot melt state with bamboo wood and become an intergrant；When the layering superposition of poly-veneer is moulded in expansion bamboo wood restructuring, Concretio silicea Bambusae seu schizostachyi layer is relative with Concretio silicea Bambusae seu schizostachyi layer, and bamboo green layer is relative with bamboo green layer；

2. there is the building structure bamboo wood of type without aldehyde of slow release spice function according to claim 1, it is characterized in that: it is removed bamboo internal segment by arc bamboo sheet that poly-veneer is moulded in the restructuring of described expansion bamboo wood, Concretio silicea Bambusae seu schizostachyi layer longitudinally cut open split, bamboo green layer is connected, flatten, fixed thickness just digs the cured layer of bamboo strip and yellow bamboo face, and carrying out bamboo wood preplasticizing modification and macromolecule resin compound is mated formation the bamboo chip after processing, yellow bamboo face is the same face, bamboo strip is the veneer that the same face, side are close to close proper alignment mutually。

3. there is the building structure bamboo wood of type without aldehyde of slow release spice function according to claim 1, it is characterised in that: this structural lumber thickness is 14-50mm, and length is 2600-4800mm, and width is 200-1200mm。