CN102626964B - Method adopting cornstalk to manufacture composite macromolecular plastic particles - Google Patents
Method adopting cornstalk to manufacture composite macromolecular plastic particles Download PDFInfo
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- CN102626964B CN102626964B CN201210088623.XA CN201210088623A CN102626964B CN 102626964 B CN102626964 B CN 102626964B CN 201210088623 A CN201210088623 A CN 201210088623A CN 102626964 B CN102626964 B CN 102626964B
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Abstract
The invention discloses a method adopting cornstalk to manufacture composite macromolecular plastic particles, which comprises the following steps: (1) cornstalk powder preparation: adopting a smashing machine to directly smash the cornstalk, enabling the smashed cornstalk to pass through a sieve of 100-500 mesh, and obtaining the cornstalk powder for reservation; (2) mixing modification of raw materials: first soaking the cornstalk powder in NaOH water solution of 5mol/L, then washing the cornstalk powder until the cornstalk powder is neutral, removing non-cellulosic components, drying under the conditions of vacuum, fully mixing the cornstalk powder with macromolecular plastics, filler, an antioxidant, a lubricant and pigments in a vacuum high-speed stirring device after drying, and performing high-pressure spraying of ethanol solution containing an antibacterial agent and an modifying agent on the surface of the mixed materials with stirring for 5-8h under the conditions of vacuum at 90 DEG C to 120 DEG C; (3) obtaining of dry powder by cooling: placing the modified materials in the step (3) in a cooling mixer to perform cooling mixing stirring, discharging the materials when the temperature is about to be 40 DEG C, and obtaining the dry powder; and (4) granulation: sending the dry powder obtained in the step (3) to a granulating machine to perform extrusion granulation.
Description
Technical field
What the present invention relates to is a kind of method that the cornstalk of the Northeast is raw material production composite high-molecular thermoplastic particle of utilizing.
Background technology
In macromolecule composite wood-plastic material production process, only focus at present mixing or the recycling of several materials, and the improvement of basic mechanical character, do not consider cmpletely the compatibility of various materials and interface in conjunction with situation, Interface adhesive strength and various material in the diffusion at interface, infiltration etc., can not guarantee that string can disperse fully in macromolecule resin, thereby affected wood/mould affinity and the bond strength at interface, caused the mechanical property of macromolecule composite wood-plastic material and other serviceabilities lower.
Patent 200610070215.6 discloses a kind of method of utilizing crop straw to produce macromolecule composite wood-plastic material, its method is by crushed stalk and is dried to obtain straw powder, straw powder is carried out to impregnation process, then be dried to obtain modification straw powder, by modification straw powder and thermoplastic resin, be that other main raw materials carry out mixed at high speed cooling and mixing and obtain dry mash, dry mash is carried out to extruding pelletization, again by the material extrusioning shaping after granulation, can make macromolecule composite wood-plastic material, but there is following shortcoming in it: due to the cellulose in the agricultural plant of every type, hemicellulose is different with content of lignin, the surface treatment that the modifier of the unified dosage of employing carries out straw powder has improved production cost (because the price comparison of various modifier is high) on the one hand, also can cause on the other hand the pollution of environment, because various modifier mostly is chemicals, if burning or again utilization can cause the pollution of environment.
Patent 200910113219.1 discloses a kind of preparation method of cotton stalk composite polymer thermoplastic resin particle, and first it carry out end-grain cutting, fragmentation by cotton stalk, rub silk, grind to form 80～120 object cotton stalk powders, moisture content≤2%; Secondly 100 parts of cotton stalk powders are dared into agitating device, and to add concentration be 5～10 parts of 5% NaOH, stir at normal temperatures after 12 hours and filter; Then remove filtrate, adding concentration is 10～30 parts of 0.7% azobisisobutyronitriles, at 75～80 ℃ of temperature, stirs 60min again; Secondly be to add 2～5 parts of styrene, 4～10 parts of methyl methacrylates again, at 90～100 0C temperature, stir again 90min; After finally cooling.The shortcoming of its existence is: the one, and the pretreatment process of cotton stalk is more, has increased production cost; The 2nd, the cycle of integral production is long, has reduced production efficiency.
The Northeast is one of main Maize Production district of China, and the fundamental component of maize straw is cellulose, hemicellulose and lignin etc., and its content is respectively 32%, 27.82% and 15.42%.The macromolecular polysaccharide that cellulose is comprised of glucose, water insoluble and common organic solvents, is important paper making raw material.Hemicellulose is mainly comprised of wood sugar, arabinose, galactolipin, mannose, is one of main component of wood pulp; Lignin is a kind of complicated phenol polymer being formed by four kinds of alcohol monomers (to tonquinol, coniferyl alcohol, 5-hydroxyl coniferyl alcohol, sinapinic alcohol), can be used as water reducer, refractory material and breeze binding agent etc.Its exploitation always are hot technology.
Summary of the invention
The present invention is directed to the deficiencies in the prior art a kind of method that adopts cornstalk to make composite high-molecular plastic grain, the good product performance that its production procedure is shorter, production efficiency is high, produce are provided.
For achieving the above object, the present invention adopts following technical scheme, the present invention includes following steps:
(1) corn straw powder preparation: adopt size reduction machinery directly to pulverize cornstalk, and cross 100-500 mesh sieve, obtain corn straw powder, standby;
(2) raw material is mixed and modified: first corn straw powder is washed after 5mol/LNaOH aqueous solution soaking to neutral, remove non-cellulose composition, then under vacuum condition, dry, after drying, fully mix in vacuum high-speed mixing equipment with high molecule plastic, filler, antioxidant, lubricant, pigment, the ethanolic solution that the high-pressure injection while stirring of carrying out 5-8 hour under 90 ℃ of-120 ℃ of conditions of vacuum subsequently contains antiseptic and modifier is to the surface of mixed material;
(3) cooling dry powder: the modification material of step (3) is put into cooling mixing machine and carry out cooling and mixing stirring, when near 40 ℃ of temperature, material is emitted, obtain dry powder;
(4) granulation: step (3) gained dry powder is sent in list/dual-screw pelletizer, carried out extruding pelletization.
Preferably, 90-120 under described vacuum condition ℃ temperature divides three steps to realize, first be stirring and the high-pressure injection process of carrying out under 90 ℃ of conditions 1-2 hour, next is stirring and the high-pressure injection process of carrying out under 100-110 ℃ of condition 3-4 hour, is finally stirring and the high-pressure injection process of carrying out under 110-120 ℃ of condition 1-2 hour; To guarantee the abundant modification in early stage of raw material, the reaction of limit modification in mid-term limit, the abundant reaction in later stage, thus make each performance of product reach optimal effectiveness.
Beneficial effect of the present invention:
The present invention is in the following border ring modification of vacuum high-temperature condition of high voltage, omitted the pre-modification procedure of raw material, and constantly stirring on the mixed material of upset owing to being high-pressure injection, can be so that modifier be given full play to modifying function, the adhesion of fortifying fibre element and wood powder and high molecule plastic molecule;
In addition, because the present invention carries out modification and reaction simultaneously, save the production cycle, improved production efficiency, also reduced production cost, and each function admirable of product of also making than prior art of the product quality finally making.
The specific embodiment
Below in conjunction with embodiment, the present invention is further illustrated, and following each embodiment is only for the present invention is described, to not restriction of the present invention.
The present invention includes following steps:
(1) corn straw powder preparation: adopt size reduction machinery directly to pulverize cornstalk, and cross 100-500 mesh sieve, obtain corn straw powder, standby;
(2) raw material is mixed and modified: first corn straw powder is washed after 5mol/LNaOH aqueous solution soaking to neutral, remove non-cellulose composition, then under vacuum condition, dry, dry rear and high molecule plastic, filler, antioxidant, lubricant, pigment fully mixes in vacuum high-speed mixing equipment, it is 8% that the high-pressure injection while stirring of carrying out 5-8 hour under 90 ℃ of-120 ℃ of conditions of vacuum subsequently contains quaternary ammonium salt active antibacterial monomer weight content, oxazolidinones active antibacterial monomer weight content is 5%, organosiloxane volume content is that 2% ethanol solution is to the surface of mixed material, the consumption of ethanol solution is 10% of straw grain weight amount, 90-120 under described vacuum condition ℃ temperature divides three steps to realize, first be stirring and the high-pressure injection process of carrying out under 90 ℃ of conditions 1-2 hour, next is stirring and the high-pressure injection process of carrying out under 100-110 ℃ of condition 3-4 hour, is finally stirring and the high-pressure injection process of carrying out under 110-120 ℃ of condition 1-2 hour, to guarantee the abundant modification in early stage of raw material, the reaction of limit modification in mid-term limit, the abundant reaction in later stage, thus make each performance of product reach optimal effectiveness.
(3) cooling dry powder: the modification material of step (3) is put into cooling mixing machine and carry out cooling and mixing stirring, when near 40 ℃ of temperature, material is emitted, obtain dry powder;
(4) granulation: step (3) gained dry powder is sent in list/dual-screw pelletizer, carried out extruding pelletization.
Claims (2)
1. adopt cornstalk to make a method for composite high-molecular plastic grain, it is characterized in that:
Comprise the following steps:
(1) corn straw powder preparation: adopt size reduction machinery directly to pulverize cornstalk, and cross 100-500 mesh sieve, obtain corn straw powder, standby;
(2) raw material is mixed and modified: first corn straw powder is washed after 5mol/LNaOH aqueous solution soaking to neutral, remove non-cellulose composition, then under vacuum condition, dry, after drying, fully mix in vacuum high-speed mixing equipment with high molecule plastic, filler, antioxidant, lubricant, pigment, the ethanolic solution that the high-pressure injection while stirring of carrying out 5-8 hour under 90 ℃ of-120 ℃ of conditions of vacuum subsequently contains antiseptic and modifier is to the surface of mixed material;
(3) the cooling dry powder that obtains: the modification material of step (2) is put into cooling mixing machine and carry out cooling and mixing stirring, when temperature is down to 40 ℃, material is emitted, obtain dry powder;
(4) granulation: step (3) gained dry powder is sent in list/dual-screw pelletizer, carried out extruding pelletization; 90-120 under described vacuum condition ℃ temperature divides three steps to realize, first be stirring and the high-pressure injection process of carrying out under 90 ℃ of conditions 1-2 hour, next is stirring and the high-pressure injection process of carrying out under 100-110 ℃ of condition 3-4 hour, is finally stirring and the high-pressure injection process of carrying out under 110-120 ℃ of condition 1-2 hour; To guarantee the abundant modification in early stage of raw material, the reaction of limit modification in mid-term limit, the abundant reaction in later stage, thus make each performance of product reach optimal effectiveness.
2. the method for claim 1, is characterized in that: comprise the following steps:
(1) corn straw powder preparation: adopt size reduction machinery directly to pulverize cornstalk, and cross 100-500 mesh sieve, obtain corn straw powder, standby;
(2) raw material is mixed and modified: first corn straw powder is washed after 5mol/LNaOH aqueous solution soaking to neutral, remove non-cellulose composition, then under vacuum condition, dry, dry rear and high molecule plastic, filler, antioxidant, lubricant, pigment fully mixes in vacuum high-speed mixing equipment, it is 8% that the high-pressure injection while stirring of carrying out 5-8 hour under 90 ℃ of-120 ℃ of conditions of vacuum subsequently contains quaternary ammonium salt active antibacterial monomer weight content, oxazolidinones active antibacterial monomer weight content is 5%, organosiloxane volume content is that 2% ethanol solution is to the surface of mixed material, the consumption of ethanol solution is 10% of straw grain weight amount, 90-120 under described vacuum condition ℃ temperature divides three steps to realize, first be stirring and the high-pressure injection process of carrying out under 90 ℃ of conditions 1-2 hour, next is stirring and the high-pressure injection process of carrying out under 100-110 ℃ of condition 3-4 hour, is finally stirring and the high-pressure injection process of carrying out under 110-120 ℃ of condition 1-2 hour, to guarantee the abundant modification in early stage of raw material, the reaction of limit modification in mid-term limit, the abundant reaction in later stage, thus make each performance of product reach optimal effectiveness, (3) the cooling dry powder that obtains: the modification material of step (2) is put into cooling mixing machine and carry out cooling and mixing stirring, when temperature is down to 40 ℃, material is emitted, obtain dry powder,
(4) granulation: step (3) gained dry powder is sent in list/dual-screw pelletizer, carried out extruding pelletization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210088623.XA CN102626964B (en) | 2012-03-30 | 2012-03-30 | Method adopting cornstalk to manufacture composite macromolecular plastic particles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210088623.XA CN102626964B (en) | 2012-03-30 | 2012-03-30 | Method adopting cornstalk to manufacture composite macromolecular plastic particles |
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| CN102626964A CN102626964A (en) | 2012-08-08 |
| CN102626964B true CN102626964B (en) | 2014-04-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111875976A (en) * | 2020-08-12 | 2020-11-03 | 界首市鸿鑫塑业有限公司 | Antibacterial and deodorant plastic composite particle and preparation method thereof |
| CN112410091A (en) * | 2020-10-10 | 2021-02-26 | 北京林业大学 | Biomass compact forming method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09225942A (en) * | 1996-02-26 | 1997-09-02 | Mabuchi:Kk | Method of recovering waste plastic and recovering machine |
| CN101475750A (en) * | 2009-01-24 | 2009-07-08 | 新疆远方置业投资有限公司 | Cotton stalk composite polymer thermoplastic resin particle and preparation thereof |
| CN201907163U (en) * | 2010-11-15 | 2011-07-27 | 江苏美芝隆机械有限公司 | Plastic extrusion unit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09225942A (en) * | 1996-02-26 | 1997-09-02 | Mabuchi:Kk | Method of recovering waste plastic and recovering machine |
| CN101475750A (en) * | 2009-01-24 | 2009-07-08 | 新疆远方置业投资有限公司 | Cotton stalk composite polymer thermoplastic resin particle and preparation thereof |
| CN201907163U (en) * | 2010-11-15 | 2011-07-27 | 江苏美芝隆机械有限公司 | Plastic extrusion unit |
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