CN103205132B - Weather-resistant bamboo-plastic composite and preparation method thereof - Google Patents

Weather-resistant bamboo-plastic composite and preparation method thereof Download PDF

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Publication number
CN103205132B
CN103205132B CN201310094863.5A CN201310094863A CN103205132B CN 103205132 B CN103205132 B CN 103205132B CN 201310094863 A CN201310094863 A CN 201310094863A CN 103205132 B CN103205132 B CN 103205132B
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China
Prior art keywords
bamboo
plastic composite
weather
titanium oxide
nano
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Expired - Fee Related
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CN201310094863.5A
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Chinese (zh)
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CN103205132A (en
Inventor
余雁
费本华
熊汉国
费鹏
蔡杰
谭军
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Huazhong Agricultural University
International Center for Bamboo and Rattan
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Huazhong Agricultural University
International Center for Bamboo and Rattan
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Priority to CN201310094863.5A priority Critical patent/CN103205132B/en
Publication of CN103205132A publication Critical patent/CN103205132A/en
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Publication of CN103205132B publication Critical patent/CN103205132B/en
Expired - Fee Related legal-status Critical Current
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention discloses weather-resistant bamboo-plastic composite and a preparation method thereof. Bamboo powder is used as main raw material. Nano titanium dioxide and nano zinc oxide are used as inorganic nano particles. Tetra-pentaerythritol ester and dilauryl thiodipropionate are used as organic antioxidant. Tetrabutyl titanate is used as coupling agent. Azobisformamide is used as foaming agent. Polyethylene wax and zinc stearate are used as lubricant. The bamboo-plastic composite is prepared by a dual-screw extrusion process after high-density polyethylene composition to improve weather resistance, strength, toughness and hydrophobic performance of bamboo-plastic outdoor decorating materials. Compared with the existing bamboo-plastic composites, the antioxidation performance and anti-light-degradation performance of the bamboo-plastic composite is increased by more than 30%. The bamboo-plastic composite can completely replace wood products at outdoor decorating materials, and accordingly wood can be saved, and benefits are brought to forest resource protection.

Description

Weather-resistant bamboo-plastic composite and preparation method thereof
Technical field
The invention belongs to the technical field of comprehensive utilization of agriculture and forestry by-product, be specifically related to a kind of Weather-resistant bamboo-plastic composite and preparation method thereof.
Background technology
China is the abundantest country of world's bamboo resource, first of the scale of bamboo grove area, bamboo wood output and industrialized utilization thereof and the horizontal Dou Ju world, while a large amount of use bamboo wood material, also basket weaver's industry product abandonment things such as a large amount of dwarf bamboos, Cluster Bamboo or bamboo surplus material of processing are produced, current people generally burn these bamboos bits, useless bamboo etc. as refuse, both resource was wasted, again serious environment pollution.
Due to rich cellulose (content of cellulose is more than 40%) such as dwarf bamboo, Cluster Bamboo, bamboo bits, useless bamboos, there is certain intensity and toughness, after suitable pre-treatment and modification, can with used plastics for bamboo-plastic composite material.This materials application is in outdoor decorations such as tree case, outdoor deck, outdoor decoration handrails; timber-work can be replaced; thus both save timber; reach the object conserved forests; decrease " white pollution " that plastic waste produces simultaneously; but also improve the added value of Forest products, open up a new way for forestry increases income.
The report of existing bamboo-plastic composite material in prior art: publication number is that the Chinese invention patent of CN101066599 discloses a kind of bamboo-plastic floorboard and preparation method thereof, this floor is moulded plate with bamboo and is made floor slab blank bonding, described bamboo mould plate fully mixed by bamboo material particle, plastic grain and additive after hot-forming under heating high-pressure condition.Publication number is the production method that the Chinese invention patent of CN1263811A discloses a kind of bamboo fiber composite material, and the method follows these steps to carry out successively: A, get the raw materials ready: bamboo wood is made dry fiber and prepares appropriate plastic grain; B, mixing: dry for the bamboo wood got ready fiber is mixed to scale with plastic grain; C, compression molding: the mixture mixed is inserted in mould, be forced into plastics be in molten state and with bamboo fibers adhere after, then stop pressurization cooling; D, the demoulding: after being cooled to certain temperature, remove refrigerant from mould.Above patent documentation is owing to adopting hydraulic pressure (mold pressing) moulding process, and be batch process, the scrap rate of finished product is high, causes production cost high, is therefore difficult to apply.In order to overcome the deadly defect of hydraulic pressure (mold pressing) moulding process, people turn to use extrusion moulding.As the publication number Chinese invention patent that is CN101619171 discloses a kind of bamboo bits and waste plastic PE composite outdoor building material and application, this matrix material makes shaping by bamboo bits 65%, old plastics PE30%, auxiliary agent 5% weight ratio after preparing burden and mixing, after preparing burden, making moulding process comprises drying treatment, surface treatment, premix, granulation, extrusion molding, cooling and cutting.The vertical bar that building materials of the present invention can be made into sheet material, cross-sectional shape is Filled Rectangle, hollow column or plane is porose, periphery is with sawtooth and coordinate the Polygons section bar etc. of half slot.Due to the poor compatibility of bamboo powder and resin, the temperature tolerance of bamboo powder is poor, the poor fluidity of bamboo powder in screw rod, and therefore, in the finished product, bamboo powder content is lower, generally below 50%, and the poor-performing of product.The present inventor for early stage patent " a kind of utilize rape stalk to make finishing material and preparation method (patent No. ZL200610018378.X) " and " a kind of utilize Cotton Stalk to make the finishing material with antibacterial and preparation method (patent No. ZL201010193640.0) " defect (light fugitive, not resistance to oxidation), adopt inorganic nano-particle and organic oxidation-resistant agent in the present invention, and adopt the disposable extruding-out process of twin screw to produce, obtain having anti-oxidant, the Weather-resistant bamboo-plastic composite of anti-light Degradation, be mainly used in exterior decorative materials.
Summary of the invention
The object of the invention is to the defect overcoming prior art existence, provide a kind of and there is Weather-resistant bamboo-plastic composite of anti-oxidant and anti-light degraded dual nature and preparation method thereof.
Above-mentioned purpose is achieved through the following technical solutions:
A kind of Weather-resistant bamboo-plastic composite, it is prepared from by the raw material of following portions by weight:
The nanometer anatase titania of described nano titanium oxide to be particle diameter be 5-50nm; The particle diameter of described nano zine oxide is 10-80nm.
Prepare a method for described Weather-resistant bamboo-plastic composite, comprise the following steps:
1) by ultrasonication after nano titanium oxide and nano zine oxide mixing, nano titanium oxide and nano zine oxide is made fully to disperse and mix;
2) bamboo powder is crossed 80 ~ 120 mesh sieves, being stirred to water content at 80 ~ 100 DEG C is 2 ~ 5%, then adds metatitanic acid fat, continues stirring 10 ~ 20 minutes, obtains modified bamboo powder;
3) nano titanium oxide step 1) obtained and nano zine oxide mixture, step 2) the modified bamboo powder that obtains and pentaerythritol tetrathioglycollate, Tyox B, high density polyethylene(HDPE), Cellmic C 121, Ployethylene Wax mix 10 ~ 20 minutes together with Zinic stearas at 100 ~ 120 DEG C, obtains mixture;
4) mixture of step 3) is placed in twin screw extruder to extrude, each section of Heating temperature T1 ~ T10 is respectively 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 160 DEG C and 120 DEG C, engine speed is 8 ~ 15 revs/min, material pressure 1.5 ~ 2MPA, through mould shape, cooling, traction and cutting are finished product.
Wherein, being stirred to water content in step (2) is 3%.
The present invention adopts nano titanium oxide, nano zine oxide as inorganic nano-particle, pentaerythritol tetrathioglycollate, Tyox B are organic oxidation-resistant agent, with metatitanic acid fat for coupling agent, Cellmic C 121 is whipping agent, Ployethylene Wax and Zinic stearas are as lubricant, after high density polyethylene(HDPE) compound action, adopt twin screw extrusion process preparation, thus improve bamboo-plastic composite material weathering resistance and intensity, toughness and hydrophobic performance.
The bamboo-plastic composite material that the present invention makes; compared with existing bamboo-plastic composite material; its antioxidant property and anti-light degradation property significantly improve; increase rate is all more than 30%, and the present invention can replace timber-work to be used for exterior decorative materials completely, thus both saves timber; reach the object conserved forests; decrease " white pollution " that plastic waste produces simultaneously, but also improve the added value of Forest products, open up a new way for forestry increases income.The features such as it is simple that the present invention also has technique simultaneously, with low cost.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
A kind of Weather-resistant bamboo-plastic composite, it is prepared from by the raw material of following portions by weight:
The nanometer anatase titania of described nano titanium oxide to be particle size range be 5-50nm; The particle size range of described nano zine oxide is 10-80nm.
The preparation method of Weather-resistant bamboo-plastic composite is:
1) by ultrasonication after nano titanium oxide and nano zine oxide mixing, the power of ultrasonication is 300W, and ultrasonic time is 300 seconds, makes nano titanium oxide and nano zine oxide fully disperse and mix;
2) bamboo powder is crossed 100 mesh sieves, at 90 DEG C, be stirred to water content is 3%, then adds metatitanic acid fat, continues stirring 10 minutes, obtains modified bamboo powder;
3) nano titanium oxide step 1) obtained and nano zine oxide mixture, step 2) the modified bamboo powder that obtains and pentaerythritol tetrathioglycollate, Tyox B, high density polyethylene(HDPE), Cellmic C 121, Ployethylene Wax mix 15 minutes together with Zinic stearas at 110 DEG C, obtains mixture;
4) mixture of step 3) is placed in twin screw extruder to extrude, each section of Heating temperature T1 ~ T10 is respectively 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 160 DEG C and 120 DEG C, engine speed is 10 revs/min, main frame electric current 15A, material pressure 1.8MPA, through mould shape, cooling, traction and cutting are finished product.
Embodiment 2
A kind of Weather-resistant bamboo-plastic composite, it is prepared from by the raw material of following portions by weight:
The preparation method of Weather-resistant bamboo-plastic composite is:
1) by ultrasonication after nano titanium oxide and nano zine oxide mixing, the power of ultrasonication is 200W, and ultrasonic time is 500 seconds, makes nano titanium oxide and nano zine oxide fully disperse and mix;
2) bamboo powder is crossed 80 mesh sieves, at 100 DEG C, be stirred to water content is 2%, then adds metatitanic acid fat, continues stirring 15 minutes, obtains modified bamboo powder;
3) nano titanium oxide step 1) obtained and nano zine oxide mixture, step 2) the modified bamboo powder that obtains and pentaerythritol tetrathioglycollate, Tyox B, high density polyethylene(HDPE), Cellmic C 121, Ployethylene Wax mix 20 minutes together with Zinic stearas at 100 DEG C, obtains mixture;
4) mixture of step 3) is placed in twin screw extruder to extrude, each section of Heating temperature T1 ~ T10 is respectively 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 160 DEG C and 120 DEG C, engine speed is 8 revs/min, main frame electric current 15A, material pressure 1.5MPA, through mould shape, cooling, traction and cutting are finished product.
Embodiment 3
A kind of Weather-resistant bamboo-plastic composite, it is prepared from by the raw material of following portions by weight:
The nanometer anatase titania of described nano titanium oxide to be particle size range be 5-50nm; The particle size range of described nano zine oxide is 10-80nm.
The preparation method of Weather-resistant bamboo-plastic composite is:
1) by ultrasonication after nano titanium oxide and nano zine oxide mixing, the power of ultrasonication is 500W, and ultrasonic time is 200 seconds, makes nano titanium oxide and nano zine oxide fully disperse and mix;
2) bamboo powder is crossed 120 mesh sieves, at 80 DEG C, be stirred to water content is 5%, then adds metatitanic acid fat, continues stirring 20 minutes, obtains modified bamboo powder;
3) nano titanium oxide step 1) obtained and nano zine oxide mixture, step 2) the modified bamboo powder that obtains and pentaerythritol tetrathioglycollate, Tyox B, high density polyethylene(HDPE), Cellmic C 121, Ployethylene Wax mix 10 minutes together with Zinic stearas at 120 DEG C, obtains mixture;
4) mixture of step 3) is placed in twin screw extruder to extrude, each section of Heating temperature T1 ~ T10 is respectively 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 160 DEG C and 120 DEG C, engine speed is 15 revs/min, material pressure 2MPA, through mould shape, cooling, traction and cutting are finished product.
Above-mentioned three embodiments all can be used as exterior finish and park finishing material, as outdoor flooring, plank road, barrier, wayside pavilion etc., can replace timber or plastics completely.The bamboo-plastic composite material that the present invention makes, compared with existing bamboo-plastic composite material, its oxidation-resistance and anti-light degradation property significantly improve, and increase rate is all more than 30%.

Claims (3)

1. prepare a method for Weather-resistant bamboo-plastic composite, it is characterized in that comprising the following steps:
1) nano titanium oxide and nano zine oxide are mixed in proportion rear ultrasonication, make nano titanium oxide and nano zine oxide fully disperse and mix;
2) bamboo powder is crossed 80 ~ 120 mesh sieves, at 80 ~ 100 DEG C, be stirred to water content is 2 ~ 5%, then adds metatitanic acid fat, continues stirring 10 ~ 20 minutes, obtains modified bamboo powder;
3) by step 1) nano titanium oxide and nano zine oxide mixture, the step 2 that obtain) the modified bamboo powder that obtains and pentaerythritol tetrathioglycollate, Tyox B, high density polyethylene(HDPE), Cellmic C 121, Ployethylene Wax mix 10 ~ 20 minutes in proportion together with Zinic stearas at 100 ~ 120 DEG C, obtains mixture;
4) by step 3) mixture be placed in twin screw extruder and extrude, each section of Heating temperature T1 ~ T10 is respectively 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C, 160 DEG C, 170 DEG C, 160 DEG C and 120 DEG C, engine speed is 8 ~ 15 revs/min, material pressure 1.5 ~ 2MPa, through mould shape, cooling, traction and cutting are finished product
The parts by weight of each raw material are:
2. the method preparing Weather-resistant bamboo-plastic composite according to claim 1, is characterized in that: the nanometer anatase titania of described nano titanium oxide to be particle diameter be 5-50nm; The particle diameter of described nano zine oxide is 10-80nm.
3. the method preparing Weather-resistant bamboo-plastic composite according to claim 1 and 2, is characterized in that: being stirred to water content in step (2) is 3%.
CN201310094863.5A 2013-03-22 2013-03-22 Weather-resistant bamboo-plastic composite and preparation method thereof Expired - Fee Related CN103205132B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103951998B (en) * 2014-05-14 2016-10-05 九江学院 A kind of hot-forming visible ray catalyst wood-plastic clad plate and preparation method thereof
CN104761819A (en) * 2015-04-25 2015-07-08 桂林理工大学 Method for preparing polyethylene-based wood-plastic composite material by utilizing bamboo powder
CN105199194A (en) * 2015-09-30 2015-12-30 南宁市聚祥塑料制品有限责任公司 Plastic and preparation method thereof
CN107353470A (en) * 2017-06-28 2017-11-17 浙江元森态木塑科技股份有限公司 A kind of high-weatherability low water absorption carbon wood composite material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101870820A (en) * 2010-06-07 2010-10-27 华中农业大学 Antibacterial decorative material made by utilizing cotton stalk and preparation method thereof
CN101880464A (en) * 2010-07-12 2010-11-10 安徽农业大学 Bamboo-based/thermoplastic plastic nanocomposite material
CN102250476A (en) * 2011-05-19 2011-11-23 安徽绿能技术研究院 Bamboo-fiber-based micro-foamed wood-plastic composite material and preparation method thereof
CN102924941A (en) * 2011-08-08 2013-02-13 深圳市格林美高新技术股份有限公司 High-strength wear-resistant plastic wood composite material and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101870820A (en) * 2010-06-07 2010-10-27 华中农业大学 Antibacterial decorative material made by utilizing cotton stalk and preparation method thereof
CN101880464A (en) * 2010-07-12 2010-11-10 安徽农业大学 Bamboo-based/thermoplastic plastic nanocomposite material
CN102250476A (en) * 2011-05-19 2011-11-23 安徽绿能技术研究院 Bamboo-fiber-based micro-foamed wood-plastic composite material and preparation method thereof
CN102924941A (en) * 2011-08-08 2013-02-13 深圳市格林美高新技术股份有限公司 High-strength wear-resistant plastic wood composite material and preparation method thereof

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