CN104829942A - Preparation method of wood-plastic material coated with modified nano particle wood powder - Google Patents

Preparation method of wood-plastic material coated with modified nano particle wood powder Download PDF

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Publication number
CN104829942A
CN104829942A CN201510229967.1A CN201510229967A CN104829942A CN 104829942 A CN104829942 A CN 104829942A CN 201510229967 A CN201510229967 A CN 201510229967A CN 104829942 A CN104829942 A CN 104829942A
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wood
wood powder
plastic material
coated
nano particle
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叶显柱
王化
田兴友
郑康
周海峰
苏政
田恐虎
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Hefei Institutes of Physical Science of CAS
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Hefei Institutes of Physical Science of CAS
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a preparation method of a wood-plastic material coated with modified nano particle wood powder. The preparation method comprises the following steps: adding wood powder into a tetraethyl orthosilicate water solution according to a weight ratio of wood powder to tetraethyl orthosilicate of 2.8-3.2:8-12, stirring for two hours to obtain a mixed solution; then dropwise adding a silane coupling agent into the mixed solution under stirring according to a weight ratio of silane coupling agent to tetraethyl orthosilicate of 3-5:40, carrying out reactions for 0.5 hour to obtain a modified wood powder solution; then subjecting the obtained modified wood powder solution to treatments of suction filtration, washing, and drying to obtain modified wood powder; mixing the modified wood powder with polypropylene particles according to a weight ratio of 35-45:55-65, transferring the mixture to a screw extruder, and moulding. The provided wood-plastic material can be used to produce high-performance wood-plastic products having the advantages of high mechanical strength, heat resistance, stable structure, and long service life, and can be widely used in fields such as construction materials, outdoor pavilions, indoor/outdoor floors and furniture, and the like.

Description

Be coated with the preparation method of the Wood-plastic material of modified Nano particle wood powder
Technical field
The present invention relates to a kind of preparation method of Wood-plastic material of wood powder, especially a kind of preparation method being coated with the Wood-plastic material of modified Nano particle wood powder.
Background technology
Current social due to scarcity of resources, environmental pollution serious, using and wasting of woodwork receives the strict restriction in various countries.Simultaneously, the process that recycles of the fiber-like materials such as waste and old wood chip, stalk and powdered rice hulls also obtains the attention of height and certain development, as preparation method and the goods of Chinese invention patent application CN 104194151 A a kind of degradable anti-soil Wood-plastic material disclosed in the 10 days December in 2014.The preparation method recorded in this patent application comprises the steps: that (1) prepares the component of following weight ratio: PP/PE powder 100,150 ~ 200 order wood powders 30 ~ 40, treated starch 20 ~ 30, glass fibre 10 ~ 15,900 ~ 1100 order fillers 5 ~ 8, Nano-meter SiO_2 2powder 10 ~ 15, toughness reinforcing compatible coupling agent 6 ~ 10, PA-02 lubricates the compatible coupling agent 4 ~ 5 of dispersion, anti-staining agent 6 ~ 8; (2) by PP/PE powder, 150 ~ 200 order wood powders, treated starch, glass fibre, 900 ~ 1100 order fillers, Nano-meter SiO_2 2powder height mixes 100 ~ 120 DEG C, fully after mixing, adds PA-02 lubrication and disperses compatible coupling agent, toughness reinforcing compatible coupling agent, anti-staining agent to mix 120 ~ 140 DEG C, fully after mixing, granulate after being cooled to 30 ~ 50 DEG C, form degradable anti-soil Wood-plastic material.Though this preparation method also obtain Wood-plastic material, so there is weak point, first, the mechanical property of the product of acquisition is not good; Secondly, the process of preparation is more loaded down with trivial details, and not only raw material is numerous, also needs repeatedly to mix at different temperature, and need cool rear granulation, causes preparation cost to be difficult to reduce.
Summary of the invention
The technical problem to be solved in the present invention, for overcoming weak point of the prior art, provides a kind of mechanical property of object product good, the preparation method of what cost of manufacture was low the be coated with Wood-plastic material of modified Nano particle wood powder.
For solving technical problem of the present invention, the technical scheme adopted is: the preparation method being coated with the Wood-plastic material of modified Nano particle wood powder comprises hydrothermal method, and particularly key step is as follows:
Step 1, first according to wood powder: the weight ratio of tetraethyl orthosilicate is the ratio of 2.8 ~ 3.2:8 ~ 12,80 ~ 100 object wood powders are added temperature is 40 ~ 50 DEG C, pH value is 2.5 ~ 3.5, concentration is stir at least 2h in the tetraethyl orthosilicate aqueous solution of 0.2 ~ 0.3vol%, obtain mixed solution, again according to silane coupling agent: the weight ratio of tetraethyl orthosilicate is the ratio of 3 ~ 5:40, in the mixed solution under stirring, silane coupling agent is dripped after 2h, dropwise rear reaction at least 0.5h, obtain modified wood powder solution;
Step 2, first modified wood powder solution is carried out to the process of suction filtration, washing and drying, obtain modified wood powder, again according to modified wood powder: the weight ratio of polypropylene GRANULES is the ratio of 35 ~ 45:55 ~ 65, both mixing are placed on screw extrusion press, extrusion moulding 5 ~ 10min at 170 ~ 180 DEG C, the obtained Wood-plastic material being coated with modified Nano particle wood powder.
The further improvement of preparation method of Wood-plastic material as being coated with modified Nano particle wood powder:
Preferably, before wood powder being added in the tetraethyl orthosilicate aqueous solution, dry 2h at being first placed on 100 ~ 110 DEG C.
Preferably, wood powder is one or more the mixture in wood powder, straw powder, kind shell powder.
Preferably, silane coupling agent is Silane coupling agent KH550.
Preferably, carrying out washing treatment is for using washing with alcohol.
Preferably, the obtained Wood-plastic material being coated with modified Nano particle wood powder is placed in the mould of 170 ~ 180 DEG C, under pressure is respectively 3MPa, 5MPa, 7MPa and 10MPa, respectively suppresses 3min continuously, obtains the Wood plastic boards being coated with modified Nano particle wood powder.
Relative to the beneficial effect of prior art be:
One, to wood powder, coated Si O 2the wood powder of nanoparticle and coating modification SiO 2the wood powder of nanoparticle uses scanning electron microscope and infrared spectrometer to characterize respectively, and from its result, the Surface coating of wood powder homodisperse SiO 2nanoparticle, and wood powder and SiO 2there occurs chemical association between nanoparticle, namely create the effect of coupling compatibility.This by coating modification SiO 2the object product obtained after the wood powder of nanoparticle and acrylic plastering fuse, both interface was homogeneous, did not have again obvious tomography, more have wood appearance, dimensional stabilizing, structure-reinforced advantage.
Its two, through to untreated Wood-plastic material (using the obtained Wood-plastic material of wood powder and polypropylene), the coated Si O that uses hydrothermal method to obtain 2test (wood powder wherein: polyacrylic weight ratio the is 40:60) result that the Wood-plastic material (unmodified product) of the wood powder of nanoparticle and the mechanical property of object product are carried out is as shown in the table,
Elongation at break % Tensile strength MPa Young's modulus MPa
Untreated Wood-plastic material 10.61 12.38 139.30
Unmodified product 16.27 28.41 177.10
Object product 14.27 33.77 206.20
Can find out by table, the Stability Analysis of Structures of object product, mechanical property is improved further.Particularly it is worth mentioning that, the tensile strength of object product is far above the tensile strength in prior art CN 104194151 A.
Its three, preparation method is simple, science, efficient.Not only efficiently solve the problem that common nano particle is easily reunited---adopt tetraethyl orthosilicate solution to decompose the nanometer coating layer building wood powder surface under hydrothermal conditions, the SiO of formation 2nanoparticle dispersion is even, also passes through modification coupling SiO 2nanoparticle and wood powder surface group, and the homogeneity of object product after adding itself and polypropylene composite materials, more have the feature that method is simple, be beneficial to actual production in wood is moulded easily.Obtained object product can be used for preparing high strength, heat-resisting, the contour performance wood plastic product of Stability Analysis of Structures, long service life, makes it have broad application prospects in fields such as building materials, outdoor Lang Ting, indoor and outdoor floor furnitures.
Accompanying drawing explanation
Fig. 1 is respectively to wood powder, coated Si O 2the wood powder of nanoparticle and coating modification SiO 2the wood powder of nanoparticle uses scanning electron microscope (SEM) to carry out one of result characterized.Wherein, Fig. 1 a is the SEM image of wood powder, and Fig. 1 b is coated Si O 2the SEM image of the wood powder of nanoparticle, Fig. 1 c is coating modification SiO 2the SEM image of the wood powder of nanoparticle; Can be found out by Fig. 1 b and Fig. 1 c, SiO 2nanoparticle disperses the surface being coated on wood powder equably.
Fig. 2 is respectively to wood powder, coated Si O 2the wood powder of nanoparticle and coating modification SiO 2the wood powder of nanoparticle uses infrared spectra (FTIR) instrument to carry out one of result characterized.Wherein, Fig. 2 a is wood powder, coated Si O 2the FTIR spectrogram of the wood powder of nanoparticle, Fig. 2 b is coated Si O 2the wood powder of nanoparticle and coating modification SiO 2the FTIR spectrogram of the wood powder of nanoparticle; As seen from Figure 2, compare untreated wood powder, after hydrothermal treatment consists, 470cm -1peak confirms that wood powder surface defines Si-O-Si key, 780cm -1peak indicates the existence of Si-O antisymmetric stretching vibration absorption peak, illustrates that the coated pattern of nanometer is formed, and, after silane-modified, due to silane and SiO 2the surface hydroxyl effect of nanoparticle, makes Si-OH key disappear, and also makes the associate hydrogen bond peak (3300 ~ 3600cm on wood powder simultaneously -1) die down, show that itself and wood powder also create coupling compatibility effect.
Fig. 3 (uses the coated Si O that hydrothermal method is obtained to untreated Wood-plastic material (using the Wood-plastic material that wood powder and polypropylene obtain) and the coated Wood-plastic material of hydro-thermal nanometer respectively 2the Wood-plastic material of the wood powder of nanoparticle) use thermal gravimetric analyzer to carry out one of result characterized.Wherein, the thermogravimetric rate curve figure of Fig. 3 a to be the thermogravimetric curve figure of untreated Wood-plastic material and the coated Wood-plastic material of hydro-thermal nanometer, Fig. 3 b be untreated Wood-plastic material and coated Wood-plastic material of hydro-thermal nanometer, i.e. the derivative figure of Fig. 3 a; As seen from Figure 3, SiO 2wood powder after the coated process of nanoparticle and polyacrylic decomposition temperature rise to some extent, and namely resistance toheat rises, and thermostability improves.
Embodiment
Below in conjunction with accompanying drawing, optimal way of the present invention is described in further detail.
First buy from market or obtain voluntarily:
As the wood powder of wood powder, straw powder and kind shell powder; Tetraethyl orthosilicate; As the Silane coupling agent KH550 of silane coupling agent; Polypropylene GRANULES.Wherein, before wood powder being added in the tetraethyl orthosilicate aqueous solution, dry 2h at being first placed on 100 ~ 110 DEG C.。
Then,
Embodiment 1
The concrete steps of preparation are:
80 object wood powders, first according to wood powder: the weight ratio of tetraethyl orthosilicate is the ratio of 2.8:12, are added that temperature is 40 DEG C, pH value is 2.5, concentration is stir 2h in the tetraethyl orthosilicate aqueous solution of 0.3vol% by step 1; Wherein, wood powder is wood powder, obtains mixed solution.Again according to silane coupling agent: the weight ratio of tetraethyl orthosilicate is the ratio of 3:40, after 2h, in the mixed solution under stirring, drip Silane coupling agent KH550, dropwise rear reaction 0.5h, obtain modified wood powder solution.
Step 2, first carries out the process of suction filtration, washing with alcohol and drying, obtains being similar to the modified wood powder shown in Fig. 1 c to modified wood powder solution.Again according to modified wood powder: the weight ratio of polypropylene GRANULES is the ratio of 35:65, is placed on screw extrusion press by both mixing, extrusion moulding 10min at 170 DEG C, the obtained Wood-plastic material being coated with modified Nano particle wood powder as shown by the curves in figure 2.
Embodiment 2
The concrete steps of preparation are:
85 object wood powders, first according to wood powder: the weight ratio of tetraethyl orthosilicate is the ratio of 2.9:11, are added that temperature is 43 DEG C, pH value is 2.8, concentration is stir 2.3h in the tetraethyl orthosilicate aqueous solution of 0.28vol% by step 1; Wherein, wood powder is wood powder, obtains mixed solution.Again according to silane coupling agent: the weight ratio of tetraethyl orthosilicate is the ratio of 3.5:40, after 2h, in the mixed solution under stirring, drip Silane coupling agent KH550, dropwise rear reaction 0.6h, obtain modified wood powder solution.
Step 2, first carries out the process of suction filtration, washing with alcohol and drying, obtains being similar to the modified wood powder shown in Fig. 1 c to modified wood powder solution.Again according to modified wood powder: the weight ratio of polypropylene GRANULES is the ratio of 38:63, is placed on screw extrusion press by both mixing, extrusion moulding 8min at 173 DEG C, the obtained Wood-plastic material being coated with modified Nano particle wood powder as shown by the curves in figure 2.
Embodiment 3
The concrete steps of preparation are:
90 object wood powders, first according to wood powder: the weight ratio of tetraethyl orthosilicate is the ratio of 3:10, are added that temperature is 45 DEG C, pH value is 3, concentration is stir 2.5h in the tetraethyl orthosilicate aqueous solution of 0.25vol% by step 1; Wherein, wood powder is wood powder, obtains mixed solution.Again according to silane coupling agent: the weight ratio of tetraethyl orthosilicate is the ratio of 4:40, after 2h, in the mixed solution under stirring, drip Silane coupling agent KH550, dropwise rear reaction 0.7h, obtain modified wood powder solution.
Step 2, first carries out the process of suction filtration, washing with alcohol and drying, obtains modified wood powder as illustrated in figure 1 c to modified wood powder solution.Again according to modified wood powder: the weight ratio of polypropylene GRANULES is the ratio of 40:60, is placed on screw extrusion press by both mixing, extrusion moulding 7min at 175 DEG C, the obtained Wood-plastic material being coated with modified Nano particle wood powder as shown by the curves in figure 2.
Embodiment 4
The concrete steps of preparation are:
95 object wood powders, first according to wood powder: the weight ratio of tetraethyl orthosilicate is the ratio of 3.1:9, are added that temperature is 48 DEG C, pH value is 3.3, concentration is stir 2.8h in the tetraethyl orthosilicate aqueous solution of 0.23vol% by step 1; Wherein, wood powder is wood powder, obtains mixed solution.Again according to silane coupling agent: the weight ratio of tetraethyl orthosilicate is the ratio of 4.5:40, after 2h, in the mixed solution under stirring, drip Silane coupling agent KH550, dropwise rear reaction 0.8h, obtain modified wood powder solution.
Step 2, first carries out the process of suction filtration, washing with alcohol and drying, obtains being similar to the modified wood powder shown in Fig. 1 c to modified wood powder solution.Again according to modified wood powder: the weight ratio of polypropylene GRANULES is the ratio of 43:58, is placed on screw extrusion press by both mixing, extrusion moulding 6min at 178 DEG C, the obtained Wood-plastic material being coated with modified Nano particle wood powder as shown by the curves in figure 2.
Embodiment 5
The concrete steps of preparation are:
100 object wood powders, first according to wood powder: the weight ratio of tetraethyl orthosilicate is the ratio of 3.2:8, are added that temperature is 50 DEG C, pH value is 3.5, concentration is stir 3h in the tetraethyl orthosilicate aqueous solution of 0.2vol% by step 1; Wherein, wood powder is wood powder, obtains mixed solution.Again according to silane coupling agent: the weight ratio of tetraethyl orthosilicate is the ratio of 5:40, after 2h, in the mixed solution under stirring, drip Silane coupling agent KH550, dropwise rear reaction 1h, obtain modified wood powder solution.
Step 2, first carries out the process of suction filtration, washing with alcohol and drying, obtains being similar to the modified wood powder shown in Fig. 1 c to modified wood powder solution.Again according to modified wood powder: the weight ratio of polypropylene GRANULES is the ratio of 45:55, is placed on screw extrusion press by both mixing, extrusion moulding 5min at 180 DEG C, the obtained Wood-plastic material being coated with modified Nano particle wood powder as shown by the curves in figure 2.
Select as one or more the mixture in the wood powder of wood powder, straw powder, kind shell powder more respectively, repeat above-described embodiment 1 ~ 5, obtained the Wood-plastic material being coated with modified Nano particle wood powder as shown by the curves in figure 2 equally.
If obtain template object product, the obtained Wood-plastic material being coated with modified Nano particle wood powder can be placed in the mould of 170 ~ 180 DEG C, under pressure is respectively 3MPa, 5MPa, 7MPa and 10MPa, respectively suppresses 3min continuously, obtains the Wood plastic boards being coated with modified Nano particle wood powder.
Obviously, those skilled in the art can carry out various change and modification to the preparation method being coated with the Wood-plastic material of modified Nano particle wood powder of the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the equivalent technologies of the claims in the present invention to these amendments of the present invention and modification, then the present invention is also intended to comprise these change and modification.

Claims (6)

1. be coated with a preparation method for the Wood-plastic material of modified Nano particle wood powder, comprise hydrothermal method, it is characterized in that key step is as follows:
Step 1, first according to wood powder: the weight ratio of tetraethyl orthosilicate is the ratio of 2.8 ~ 3.2:8 ~ 12,80 ~ 100 object wood powders are added temperature is 40 ~ 50 DEG C, pH value is 2.5 ~ 3.5, concentration is stir at least 2h in the tetraethyl orthosilicate aqueous solution of 0.2 ~ 0.3vol%, obtain mixed solution, again according to silane coupling agent: the weight ratio of tetraethyl orthosilicate is the ratio of 3 ~ 5:40, in the mixed solution under stirring, silane coupling agent is dripped after 2h, dropwise rear reaction at least 0.5h, obtain modified wood powder solution;
Step 2, first modified wood powder solution is carried out to the process of suction filtration, washing and drying, obtain modified wood powder, again according to modified wood powder: the weight ratio of polypropylene GRANULES is the ratio of 35 ~ 45:55 ~ 65, both mixing are placed on screw extrusion press, extrusion moulding 5 ~ 10min at 170 ~ 180 DEG C, the obtained Wood-plastic material being coated with modified Nano particle wood powder.
2. the preparation method being coated with the Wood-plastic material of modified Nano particle wood powder according to claim 1, is characterized in that before being added by wood powder in the tetraethyl orthosilicate aqueous solution, dry 2h at being first placed on 100 ~ 110 DEG C.
3. the preparation method being coated with the Wood-plastic material of modified Nano particle wood powder according to claim 2, is characterized in that wood powder is one or more the mixture in wood powder, straw powder, kind shell powder.
4. the preparation method being coated with the Wood-plastic material of modified Nano particle wood powder according to claim 2, is characterized in that silane coupling agent is Silane coupling agent KH550.
5. the preparation method being coated with the Wood-plastic material of modified Nano particle wood powder according to claim 2, is characterized in that carrying out washing treatment is use washing with alcohol.
6. the preparation method being coated with the Wood-plastic material of modified Nano particle wood powder according to claim 2, it is characterized in that the mould obtained Wood-plastic material being coated with modified Nano particle wood powder being placed in 170 ~ 180 DEG C, under pressure is respectively 3MPa, 5MPa, 7MPa and 10MPa, respectively suppresses 3min continuously, obtains the Wood plastic boards being coated with modified Nano particle wood powder.
CN201510229967.1A 2015-05-07 2015-05-07 Preparation method of wood-plastic material coated with modified nano particle wood powder Pending CN104829942A (en)

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN105542445A (en) * 2015-12-27 2016-05-04 常州亚环环保科技有限公司 Method for preparing wood-plastic composite material by modified wood chips
CN106317934A (en) * 2016-08-31 2017-01-11 吴振清 Degradable lightweight polyolefin composite for injection molding and preparation method of composite
CN107459832A (en) * 2017-09-26 2017-12-12 苏州卫刚木包装制品有限公司 A kind of waterproof shock resistance wood moulding packaging material and preparation method thereof
CN109233316A (en) * 2018-09-20 2019-01-18 界首永恩机电科技有限公司 A kind of preparation method of high-intensity wood plastic composite foam material
CN111438835A (en) * 2020-04-01 2020-07-24 苏州新华美塑料有限公司 Composite environment-friendly plastic particle and preparation method thereof
CN114752226A (en) * 2022-05-24 2022-07-15 乐山师范学院 Bamboo powder/SiO2Composite powder and preparation method thereof

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105542445A (en) * 2015-12-27 2016-05-04 常州亚环环保科技有限公司 Method for preparing wood-plastic composite material by modified wood chips
CN106317934A (en) * 2016-08-31 2017-01-11 吴振清 Degradable lightweight polyolefin composite for injection molding and preparation method of composite
CN106317934B (en) * 2016-08-31 2018-08-10 吴振清 A kind of degradable lightweight injection molding composite polyolefine material and preparation method thereof
CN107459832A (en) * 2017-09-26 2017-12-12 苏州卫刚木包装制品有限公司 A kind of waterproof shock resistance wood moulding packaging material and preparation method thereof
CN109233316A (en) * 2018-09-20 2019-01-18 界首永恩机电科技有限公司 A kind of preparation method of high-intensity wood plastic composite foam material
CN111438835A (en) * 2020-04-01 2020-07-24 苏州新华美塑料有限公司 Composite environment-friendly plastic particle and preparation method thereof
CN114752226A (en) * 2022-05-24 2022-07-15 乐山师范学院 Bamboo powder/SiO2Composite powder and preparation method thereof

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Application publication date: 20150812