CN105175342B - A kind of method of ionic liquid and its homogeneous modified reed enhancing PE composite materials - Google Patents
A kind of method of ionic liquid and its homogeneous modified reed enhancing PE composite materials Download PDFInfo
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- CN105175342B CN105175342B CN201510666872.6A CN201510666872A CN105175342B CN 105175342 B CN105175342 B CN 105175342B CN 201510666872 A CN201510666872 A CN 201510666872A CN 105175342 B CN105175342 B CN 105175342B
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- reed
- ionic liquid
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/56—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms
- C07D233/60—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms with hydrocarbon radicals, substituted by oxygen or sulfur atoms, attached to ring nitrogen atoms
-
- 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
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The present invention provides a kind of methods that ionic liquid and its homogeneous modified reed enhance PE composite materials, belong to materials synthesis and modified field.The ionic liquid is using N vinyl imidazoles and 2 chlorethanols as raw material, according to molar ratio (1~1.5):1 vinyl, the 3 hydroxyethyl imidazole chlorine of 1 synthesis；The present invention is homogeneously modified reed using 1 vinyl of ionic liquid, 3 hydroxyethyl imidazole chlorine, and it is compound with PE to be homogeneously modified reed, and preparing homogeneous modified reed enhances PE composite materials；The ionic liquid that the present invention designs effectively reduces the surface polarity of reed, improves the solvability of reed fiber.Compared with conventional method, homogeneously modified method carries out reed using ionic liquid, has the advantages that reaction dissolvent environmental protection, can be recycled；The method being homogeneously modified simultaneously improves the compatibility between reed and PE, and homogeneous modified reed/PE composite materials of preparation not only have good mechanical property, but also processing performance is excellent.
Description
Technical field
The invention belongs to materials synthesis and modified field, and in particular to a kind of ionic liquid that can be recycled of synthesis, and
Reed is homogeneously modified using this ionic liquid as solvent, will homogeneously be modified reed applied to PE prepare homogeneous modified reed/
PE composite materials.
Background technology
Plant fiber is nature natural polymer the abundantest, and plant fiber/thermoplasticity is prepared by blending technology
Resin composite materials are the new ways for effectively developing and utilizing this kind of renewable resource.Reed is a kind of natural plant fibre,
With yield height, advantage low, that growth cycle is short is required to growing environment.Cellulose is the main component of reed, due to its knot
In structure there are a large amount of hydroxyl cause reed fiber have it is highly polar, make its interface between non-polar resin (such as PP, PE)
Wetability, interfacial adhesion effect are very poor, cause the machinery of not surface treated Plant Cellulose/Thermoplastics Composite strong
It spends relatively low.In order to obtain the composite material of excellent combination property, it is necessary to be modified to fiber.Major part reed is modified all at present
It is carried out under conditions of heterogeneous, this does not only result in reaction and can only be carried out on reed surface, and also needs to a large amount of
Chemical reagent and solvent lead to the wasting of resources and environmental pollution.
Generally having due to making it not melt there are intramolecular and intermolecular hydrogen bond in cellulosic structure and not readily dissolving
In solvent.But there is researcher's discovery in recent years, cellulose can dissolve in ionic liquid, this is the dissolving for improving cellulose
Property opens a new way.Ionic liquid refer at a temperature of room temperature or near room temperature present liquid, completely by negative and positive from
The salt that son is formed, also referred to as low temperature molten salt.It is generally made of organic cation and inorganic anion, common cation
There are quaternary ammonium salt ion, quaternary phosphine salt ion, imidazolium ion and pyrroles's salt ion etc., anion has halide ion, tetrafluoroborate
Ion, hexafluorophosphoricacid acid ions etc..With conventional organic solvents and electrolyte phase ratio, ionic liquid has a series of outstanding excellent
Point, such as：Ionic liquid is tasteless, non-ignitable, its vapour pressure is extremely low, therefore can be applicable in high vacuum system, at the same can reduce because
The problem of environmental pollution of volatilization and generation；Ionic liquid has good solvability to organic and inorganic matter, reaction can be made to exist
It is carried out under homogeneous phase condition, while equipment volume can be reduced；Operable temperature range is wide (- 40-300 DEG C), has good heat steady
Qualitative and chemical stability, easily detaches with other materials, can recycle.Therefore ionic liquid is traditional volatile solvent
Ideal substitute, it efficiently avoids environment, health, safety and equipment caused when conventional organic solvents use and corrodes
The problems such as, it is qualified green solvent.
For this purpose, a kind of environmentally protective, ionic liquid that can be recycled of synthesis is solvent, to reed carry out it is homogeneous it is modified with
Improving its compatibility between non-polar resin has very important theory significance and realistic meaning, this is also to opening up high property
The application field of energy bulrush composite material is necessary.
Invention content
It is of the invention to solve the problems, such as that reed is low with the mechanical strength that PE is compound in the prior art, poor in processability
Purpose is to provide a kind of ionic liquid for being modified reed, which can be used for homogeneously being modified reed, overcome reed
The problem of dissolubility difference improves the comprehensive performance of reed and PE composite materials.
In order to achieve the above objectives, the invention is realized in this way：A kind of ionic liquid, the ionic liquid have such as I institute of formula
The structure shown：
The ionic liquid is using N- vinyl imidazoles and ethylene chlorhydrin as raw material, according to molar ratio (1~1.5):1 synthesis
1- vinyl -3- hydroxyethyl imidazole chlorine.
As a preferred embodiment of the invention, the molar ratio of N- vinyl imidazoles and ethylene chlorhydrin is 1.2:1.Due to
It is connected with hydroxyl and unsaturated bond simultaneously on the ionic liquid side chain, and there are the vacancy C2 for its imidazole ring, therefore it is to cellulose
Solvability it is preferable.
Above-mentioned ionic liquid is prepared using following methods：N- vinyl imidazoles are placed in agitating device and nitrogen protection
Reactor in, reactor is placed in 90 DEG C of constant temperature oil baths, ethylene chlorhydrin is slowly added dropwise under magnetic stirring, persistently stirs 4-
It is washed with ether after 10h, is subsequently placed in after being dried in vacuo 10~12h in 80~90 DEG C of vacuum drying chambers and obtains imidazole-like ionic liquid
Body 1- vinyl -3- hydroxyethyl imidazole chlorine.
Another object of the present invention is the application that above-mentioned ionic liquid is claimed in reed is modified.
Due to the effects that there is a large amount of intramolecular and intermolecular hydrogen bondings in reed structure power, molecular polarity is stronger, leads
Cause dispersibility and dissolubility in common solvent surface treatment process all very poor.The homogeneous modification side of the ionic liquid that the present invention synthesizes
Method can preferably solve the problems such as reed dissolubility difference in the prior art and reed low with resin boundary surface bond strength.
Another aspect of the invention be claimed with above-mentioned ionic liquid 1- vinyl -3- hydroxyethyl imidazoles chlorine to reed into
Row is homogeneous modified, and it is compound with PE homogeneously be modified reed, prepares and is homogeneously modified reed enhancing PE composite materials.
To reach superior comprehensive performance, by homogeneous modified reed smash it is dry after with PE in mass ratio 20:80~30:
70 mixing, using two-roll mill at 150~170 DEG C 3~5min of melting mixing, be kneaded uniformly after pressure be 15MPa, temperature
Degree is hot pressing 5min in 160~180 DEG C of vulcanizing press, obtains homogeneously being modified reed enhancing PE composite materials.Most preferably,
The mass ratio of modified reed and PE are 30:70.
As a preferred embodiment of the invention, the homogeneous-phase modification method is as follows：Ionic liquid is added to three
In mouth flask, the magnetic agitation in 100 DEG C of constant temperature oil baths is added powdered reed, is stirred continuously and is dissolved, is configured to by several times
The solution of mass fraction 5%, then adds chloroacetic chloride, in N2It is heated to 80 DEG C under protection, is gone out with methanol extraction after stirring 6h
Drying is washed with deionized after suction filtration to get homogeneous modified reed for white product, while rotary evaporation solution recycling ionic liquid
Body.To be optimal effect, 10g ionic liquids are added per 1mol chloroacetic chlorides.
Compared with the prior art, the present invention has following prominent characteristics：
1, the present invention devises a kind of new ionic liquid, by N- vinyl imidazoles and ethylene chlorhydrin one-step synthesis side chain
Simultaneous with the glyoxaline ion liquid of double bond and hydroxyl, which effectively reduces the surface polarity of reed, improves
The solvability of reed fiber.
2, compared with conventional method, homogeneously modified method carries out reed using ionic liquid, there is reaction dissolvent
Environmental protection, the advantages of can be recycled；Homogeneously modified method improves the compatibility between reed and PE simultaneously, preparation it is homogeneous
Modified reed/PE composite materials not only have good mechanical property, but also processing performance is excellent.
Description of the drawings
Fig. 1 be the present invention synthesis ionic liquid FTIR spectrograms, tested using KBr tabletting methods, to product structure into
Row characterization；
Fig. 2 is present invention synthesis ionic liquid1H-NMR spectrum, nuclear magnetic resonance spectrometer measure product1H-NMR, solvent are
DMSO；
Fig. 3 is homogeneous modified reed and unmodified reed FTIR comparison diagrams；Curve A is the FTIR spectrums of unmodified reed in figure
Figure, curve B are the FTIR spectrograms of homogeneous modified reed；
Fig. 4 is homogeneously to be modified reed/PE composite materials and unmodified reed/PE composite material section SEM comparison diagrams, in figure
(a), (b) is respectively the section SEM figures that unmodified reed/PE composite materials amplifies 100 times and 1000 times, (c), (d) respectively
Homogeneous modified reed/PE composite materials amplify 100 times and 1000 times of section SEM figures；
Fig. 5 is that recycling ionic liquid synthesizes ionic liquid FTIR comparison diagrams with new, and curve A is new synthesis ionic liquid in figure
Body, curve B are to recycle ionic liquid for the first time, and curve C is the FTIR spectrograms for recycling ionic liquid again.
Specific implementation mode
Below by way of the method that specific implementation example further illustrates the present invention description, but it is not meant to the present invention only office
It is limited to these examples.PE of the present invention is high density polyethylene (HDPE) and low density polyethylene (LDPE) in mass ratio 30：Institute after 70 mixing
The polyethylene obtained.
Embodiment 1
Method for synthesizing ionic liquid：N- vinyl imidazoles (0.60mol) are added in 250ml four-hole boiling flasks, 90 DEG C of perseverances
Ethylene chlorhydrin (0.60mol) is slowly dropped in flask by warm oil bath, magnetic agitation under nitrogen protection, with reaction into
Row, solution gradually become golden yellow from colourless.After persistently washing 3 times with ether after stirring 10h, the golden yellow liquid of synthesis is set
Ionic liquid is obtained after being dried in vacuo 12h in 80 DEG C of vacuum drying chambers.
Homogeneous modified reed method：10g ionic liquids are added in three-necked flask, 100 DEG C of constant temperature oil baths, magnetic force stirs
It mixes.Powdered reed is added in three-necked flask several times, gradually dissolving, is configured to mass fraction 5% under constant stirring
Solution.78.5g chloroacetic chlorides are added, in N2It is heated to 80 DEG C under protection, is gone out with methanol extraction after magnetic agitation to predetermined time white
Color product is filtered and is dried for standby after being washed with deionized, and obtains homogeneously being modified reed.It is recycled after solution rotating evaporation drying
It utilizes.
Homogeneous modified reed/PE composite material and preparation method thereofs：By homogeneous modified reed smash it is dry after with PE in mass ratio
30:70 weigh, using two-roll mill at 160 DEG C melting mixing 3min, pressure is 15MPa, temperature is after being kneaded uniformly
Hot pressing 5min making sheet in 170 DEG C of vulcanizing press obtains homogeneously being modified reed/PE composite materials.
Embodiment 2
Method for synthesizing ionic liquid：N- vinyl imidazoles (0.60mol) are added in 250ml four-hole boiling flasks, 90 DEG C of perseverances
Ethylene chlorhydrin (0.550mol) is slowly dropped in flask by warm oil bath, magnetic agitation under nitrogen protection, with reaction into
Row, solution gradually become golden yellow from colourless.After persistently washing 3 times with ether after stirring 10h, the golden yellow liquid of synthesis is set
It is dried in vacuo 12h in 80 DEG C of vacuum drying chambers.
Homogeneous modified reed method：10g ionic liquids are added in three-necked flask, 100 DEG C of constant temperature oil baths, magnetic force stirs
It mixes.Powdered reed is added in three-necked flask several times, gradually dissolving, is configured to mass fraction 5% under constant stirring
Solution.78.5g chloroacetic chlorides are added, in N2It is heated to 80 DEG C under protection, is gone out with methanol extraction after magnetic agitation to predetermined time white
Color product is filtered and is dried for standby after being washed with deionized, and obtains homogeneously being modified reed.It is recycled after solution rotating evaporation drying
It utilizes.
Homogeneous modified reed/PE composite material and preparation method thereofs：By homogeneous modified reed smash it is dry after with PE in mass ratio
30:70 weigh, using two-roll mill at 160 DEG C melting mixing 3min, pressure is 15MPa, temperature is after being kneaded uniformly
Hot pressing 5min making sheet in 170 DEG C of vulcanizing press obtains homogeneously being modified reed/PE composite materials.
Embodiment 3
Method for synthesizing ionic liquid：N- vinyl imidazoles (0.60mol) are added in 250ml four-hole boiling flasks, 90 DEG C of perseverances
Ethylene chlorhydrin (0.50mol) is slowly dropped in flask by warm oil bath, magnetic agitation under nitrogen protection, with reaction into
Row, solution gradually become golden yellow from colourless.After persistently washing 3 times with ether after stirring 10h, the golden yellow liquid of synthesis is set
It is dried in vacuo 12h in 80 DEG C of vacuum drying chambers.
Homogeneous modified reed method：10g ionic liquids are added in three-necked flask, 100 DEG C of constant temperature oil baths, magnetic force stirs
It mixes.Powdered reed is added in three-necked flask several times, gradually dissolving, is configured to mass fraction 5% under constant stirring
Solution.78.5g chloroacetic chlorides are added, in N2It is heated to 80 DEG C under protection, is gone out with methanol extraction after magnetic agitation to predetermined time white
Color product is filtered and is dried for standby after being washed with deionized, and obtains homogeneously being modified reed.It is recycled after solution rotating evaporation drying
It utilizes.
Homogeneous modified reed/PE composite material and preparation method thereofs：By homogeneous modified reed smash it is dry after with PE in mass ratio
30:70 weigh, using two-roll mill at 160 DEG C melting mixing 3min, pressure is 15MPa, temperature is after being kneaded uniformly
Hot pressing 5min making sheet in 170 DEG C of vulcanizing press obtains homogeneously being modified reed/PE composite materials.
Embodiment 4
Method for synthesizing ionic liquid：N- vinyl imidazoles (0.60mol) are added in 250ml four-hole boiling flasks, 90 DEG C of perseverances
Ethylene chlorhydrin (0.45mol) is slowly dropped in flask by warm oil bath, magnetic agitation under nitrogen protection, with reaction into
Row, solution gradually become golden yellow from colourless.After persistently washing 3 times with ether after stirring 10h, the golden yellow liquid of synthesis is set
It is dried in vacuo 12h in 80 DEG C of vacuum drying chambers.
Homogeneous modified reed method：10g ionic liquids are added in three-necked flask, 100 DEG C of constant temperature oil baths, magnetic force stirs
It mixes.Powdered reed is added in three-necked flask several times, gradually dissolving, is configured to mass fraction 5% under constant stirring
Solution.78.5g chloroacetic chlorides are added, in N2It is heated to 80 DEG C under protection, is gone out with methanol extraction after magnetic agitation to predetermined time white
Color product is filtered and is dried for standby after being washed with deionized, and obtains homogeneously being modified reed.It is recycled after solution rotating evaporation drying
It utilizes.
Homogeneous modified reed/PE composite material and preparation method thereofs：By homogeneous modified reed smash it is dry after with PE in mass ratio
30:70 weigh, using two-roll mill at 160 DEG C melting mixing 3min, pressure is 15MPa, temperature is after being kneaded uniformly
Hot pressing 5min making sheet in 170 DEG C of vulcanizing press obtains homogeneously being modified reed/PE composite materials.
Embodiment 5
Method for synthesizing ionic liquid：N- vinyl imidazoles (0.60mol) are added in 250ml four-hole boiling flasks, 90 DEG C of perseverances
Ethylene chlorhydrin (0.40mol) is slowly dropped in flask by warm oil bath, magnetic agitation under nitrogen protection, with reaction into
Row, solution gradually become golden yellow from colourless.After persistently washing 3 times with ether after stirring 4h, the golden yellow liquid of synthesis is set
It is dried in vacuo 10h in 90 DEG C of vacuum drying chambers.
Homogeneous modified reed method：10g ionic liquids are added in three-necked flask, 100 DEG C of constant temperature oil baths, magnetic force stirs
It mixes.Powdered reed is added in three-necked flask several times, gradually dissolving, is configured to mass fraction 5% under constant stirring
Solution.78.5g chloroacetic chlorides are added, in N2It is heated to 80 DEG C under protection, is gone out with methanol extraction after magnetic agitation to predetermined time white
Color product is filtered and is dried for standby after being washed with deionized, and obtains homogeneously being modified reed.It is recycled after solution rotating evaporation drying
It utilizes.
Homogeneous modified reed/PE composite material and preparation method thereofs：By homogeneous modified reed smash it is dry after with PE in mass ratio
20:80 weigh, using two-roll mill at 150 DEG C melting mixing 3min, pressure is 15MPa, temperature is after being kneaded uniformly
Hot pressing 5min making sheet in 160 DEG C of vulcanizing press obtains homogeneously being modified reed/PE composite materials.
Comparative example 1
Unmodified reed/PE composite material and preparation method thereofs：By unmodified reed smash it is dry after with PE in mass ratio 30:70
Weigh, using two-roll mill at 160 DEG C melting mixing 3min, pressure is 15MPa, temperature is 170 DEG C after being kneaded uniformly
Vulcanizing press in hot pressing 5min making sheet, obtain unmodified reed/PE composite materials.Table 1 lists homogeneous modified reed respectively
The mechanical property and processing performance test result of reed/PE composite materials and unmodified reed/PE composite materials.
Table 1
Embodiment test data shows that when N- vinyl imidazoles and ethylene chlorhydrin molar ratio be 6 in above-mentioned table 1：When 5,
Mutually the comprehensive performance of modified reed/PE composite materials is best.The test data of embodiment and comparative example shows to match in reed and PE
In the case of identical, compared with unmodified reed/PE composite materials, it is homogeneously modified the processing performance of reed/PE composite materials
It is substantially unaffected, and composite material, while mechanical strength improves, impact flexibility also obviously increases, illustrates homogeneously to be modified reed
Reed has the function of PE while enhancing, toughening.
Claims (2)
1. a kind of method of homogeneous modified reed enhancing PE composite materials, which is characterized in that use ionic liquid 1- vinyl -3-
Hydroxyethyl imidazole chlorine is homogeneously modified reed, by homogeneous modified reed smash it is dry after with PE in mass ratio 20:80~30:
70 mixing, using two-roll mill at 150~170 DEG C 3~5min of melting mixing, be kneaded uniformly after pressure be 15MPa, temperature
Degree is hot pressing 5min in 160~180 DEG C of vulcanizing press, obtains homogeneously being modified reed enhancing PE composite materials；
The preparation method of the ionic liquid is：Using N- vinyl imidazoles and ethylene chlorhydrin as raw material, molar ratio 1.2:1；By N-
Vinyl imidazole is placed in the reactor with agitating device and nitrogen protection, and reactor is placed in 90 DEG C of constant temperature oil baths,
Ethylene chlorhydrin is slowly added dropwise under magnetic agitation, is washed with ether after persistently stirring 4-10h, is subsequently placed in 80~90 DEG C of vacuum drying
Glyoxaline ion liquid 1- vinyl -3- hydroxyethyl imidazole chlorine is obtained after being dried in vacuo 10~12h in case；
The homogeneous-phase modification method is as follows：Ionic liquid is added in three-necked flask, magnetic force stirs in 100 DEG C of constant temperature oil baths
It mixes, powdered reed is added by several times, is stirred continuously and is dissolved, be configured to the solution of mass fraction 5%, then add acetyl
Chlorine, in N2It is heated to 80 DEG C under protection, stirs and go out white product with methanol extraction after 6h, baking is washed with deionized after suction filtration
It is dry to be modified reed to get homogeneous, while rotary evaporation solution recycles ionic liquid；10g ionic liquids are added per 1mol chloroacetic chlorides.
It is prepared 2. a kind of homogeneous modified reed/PE composite materials are any methods described in accordance with the claim 1.
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| CN108997219A (en) * | 2018-07-04 | 2018-12-14 | 西北工业大学 | A kind of 1- (2- ethoxy) -3- vinyl imidazole chloride ion liquid function monomer and preparation method |
| CN109401021B (en) * | 2018-11-08 | 2021-02-09 | 中国科学院过程工程研究所 | Ionic liquid modified bio-based composite material and preparation method thereof |
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| CN101497668A (en) * | 2009-02-24 | 2009-08-05 | 华南理工大学 | Homogeneous phase modifying method for cellulose in ion liquid |
| CN102504274A (en) * | 2011-09-29 | 2012-06-20 | 中国科学院过程工程研究所 | Method for homogeneously derivatizing plant fiber raw material by taking ionic liquid as medium |
| CN102634039A (en) * | 2012-04-18 | 2012-08-15 | 江南大学 | Pretreatment method of native cellulose fibers for reinforced composite |
| US20140004563A1 (en) * | 2012-06-22 | 2014-01-02 | Suganit Systems, Inc. | Method and apparatus for treatment of biomass substrates |
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| CN101497668A (en) * | 2009-02-24 | 2009-08-05 | 华南理工大学 | Homogeneous phase modifying method for cellulose in ion liquid |
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| CN102634039A (en) * | 2012-04-18 | 2012-08-15 | 江南大学 | Pretreatment method of native cellulose fibers for reinforced composite |
| US20140004563A1 (en) * | 2012-06-22 | 2014-01-02 | Suganit Systems, Inc. | Method and apparatus for treatment of biomass substrates |
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