CN108530581A - A method of preparing water-absorbing resin using waste high polymer - Google Patents
A method of preparing water-absorbing resin using waste high polymer Download PDFInfo
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- CN108530581A CN108530581A CN201810371137.6A CN201810371137A CN108530581A CN 108530581 A CN108530581 A CN 108530581A CN 201810371137 A CN201810371137 A CN 201810371137A CN 108530581 A CN108530581 A CN 108530581A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
- C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F257/00—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
- C08F257/02—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The present invention is cumbersome, of high cost for the traditional recovery process of waste high polymer, easily causes the practical problems such as secondary pollution, a kind of technique preparing multifunctional ceiling water-resin using spent high molecular material is provided, specifically includes dissolution process, emulsification causes process, graft copolymerization process, cross-linking reaction process and product cleaning procedure.The new material of synthesis has efficient moisture pick-up properties, good water retention property and recycling performance, and the fields such as curing agent, drier have higher application value in agricultural gardening, environment pollution control, building.
Description
Technical field
The present invention relates to a kind of methods using the regenerating transformed multifunctional ceiling water-resin of waste high polymer, belong to ring
Border is protected and the solid waste resource recovery new technology in comprehensive utilization of resources field, is particularly suitable for polyethylene, polypropylene and
The resource utilization and recycling utilization of mixing high molecular polymer based on polystyrene.
Background technology
Waste high polymer includes mainly waste plastic, waste old and waste textile, wherein waste plastic institute
Accounting example is maximum.Mass production due to plastic products and consumption produce a large amount of waste plastic using after discarded.According to report
Road, waste plastics accounting is about 8-12% in global country variant municipal garbage.The municipal usual complicated component of plastics, mainly by low close
Spend polyethylene (LDPE), high density polyethylene (HDPE) (HDPE), polystyrene (PS), the compositions such as polypropylene (PP).Waste plastic due to
It is difficult to degrade, cause many problem of environmental pollutions.Therefore, realize that the recycling of waste plastic receives the concern in the whole world,
It can solve " white pollution " and realize to turn waste into wealth, alleviating energy crisis.The recycling of waste plastic is main at present
In terms of concentrating on recycling granulation and thermal cracking, but both methods is of high cost, and technique is cumbersome, and added value of product is low, reaction system
It is complicated, and it is also easy to produce secondary pollution.Waste plastic contains a large amount of tertiary carbon as a kind of high molecular polymer in structure
Atom, under initiator attack, dehydrogenation reaction can occur for tertiary carbon atom, form macromolecular chain free radical, so with hydrophily object
Matter carries out graft copolymerization, cross-linking reaction under crosslinking agent effect, converts it into the novel-section with certain water-absorbing-retaining function
Material.Currently, China studies less in terms of waste plastic functionalization recycling, most of waste plastic is not yet received reasonably
Processing.
Country of the China as a water resources shortage, is faced with severe water environment crisis, and shortage of water resources, water are dirty
The problems such as dye, flood, becomes increasingly conspicuous.How to realize that efficient and rational utilize of limited water resources is the emphasis studied at present.Closely
Nian Lai, super absorbent resin receive the favor of researcher as a kind of water management material.It is a kind of containing there are many hydrophilies
Group such as-OH ,-COOH ,-NH2There is three dimensional network Deng what, the physical crosslinking that is mutually wound by strand or chemical crosslinking were formed
The new functional macromolecule material of network structure, not soluble in water and organic solvent.It, can be in a short time compared with conventional absorbent material
Absorb the water of own wt hundreds to thousands times.Meanwhile by hydrogen bond/Van der Waals force between hydrophilic radical and hydrone with
And the effect of three-dimensional net structure itself, certain water retention property is made it have, it is extensive even if being not easy to squeeze out after being pressurized
Should have in fields such as health care, agricultural gardening, food processing, environmental protection, beauty and make-up, civil construction, oil exploitations.But
It is that 80% super absorbent resin is polyacrylic acid synthesis system currently on the market, and of high cost, intensity is low, repeat performance
It is poor, and with the rise of oil price, cost of material will increasingly rise, exploitation has both economy and functional water-absorbing resin
Become current research emphasis.The present invention provides a kind of sides that waste and old mixed plastic is converted to multifunctional ceiling water-resin
Method mainly uses reversed emulsion polymerization, passes through the graft copolymerization between hydrophilic radical and waste and old mixed plastic, cross-linking reaction
Sintetics.Established new process is efficient, applicability is wide, at low cost, simple for process, mild condition, added value of product are high, has
Vast market prospect and competitiveness.
Invention content
The present invention is complicated for waste high polymer recycling system, and technique is cumbersome, of high cost, utilization rate
It is low, the practical problems such as secondary pollution are easily caused, provides and a kind of preparing multifunctional ceiling water-resin using spent high molecular material
Technique realizes the high added value recycling of spent high molecular material.It is characterized in that：By spent high molecular material through simple
It cleans, after shearing-crushing, is dissolved in solvent, emulsifier, initiator, hydrophilic monomer and friendship are then sequentially added into reaction system
Join agent, carry out graft copolymerization, cross-linking reaction, synthesizes multifunctional ceiling water-resin.The new material of synthesis have efficient moisture pick-up properties,
Good water retention property and recycling performance, curing agent, drier etc. in agricultural gardening, environment pollution control, building
Field has higher application value.
The present invention completes according to the following steps：
1, pretreatment procedure：Waste high polymer material is cleaned first, shearing-crushing is to 1-5 lis after drying
Rice, can directly use the leftover pieces generated in macromolecule material product production process.
2, dissolution process：Above-mentioned cleaning, broken waste high polymer are taken, is placed in reaction kettle, solvent is added,
It is passed through nitrogen displaced air, opens condensing reflux, is warming up to set temperature, opens mechanical agitator, macromolecule after 5-10 minutes
Polymer all dissolves；Solvent for use is xylene solution, and reaction temperature is 115-120 DEG C.
3, it emulsifies, cause process：Reaction kettle is opened, emulsifier and initiator is added, reacts 0.5-1.0 hours and completes breast
Change, initiation reaction；The emulsifier of addition is span60, and addition is equivalent to the 30-70% of waste high polymer weight；Add
The initiator entered is benzoyl peroxide, and addition is equivalent to the 3.0-5.5% of waste high polymer weight.
4, graft copolymerization process：System temperature is down to 85-105 DEG C, under agitation, dropwise addition is neutralized through NaOH solution
To the acrylic acid that degree of neutralization is 65%-85%, addition is equivalent to 2-8 times of waste high polymer weight, stirs 10 points
Clock.
5, cross-linking reaction process：Reaction kettle is opened, the crosslinking for being equivalent to waste high polymer weight 10-30% is added
Agent N, N- methylene-bisacrylamide aqueous solution, the grease volume ratio for adjusting system are 1.0-1.3:After 1.0, reaction kettle is sealed；
It is quickly stirred according to 400-450rpm 0.5 hour, after forming stable reaction system, reacts 1.0-3.0 at 100-400rpm
Reaction is completed after hour；
6, product cleaning procedure：After reaction, product is taken out from reaction kettle, is cleaned repeatedly with second alcohol and water,
Drying to constant weight at 80 DEG C.Cleavable at bulk or shape of claying into power according to purposes, packaging is finished product.
This technique has following characteristics：
1, the waste high polymer used in this technique includes high density polyethylene (HDPE) shopping bag (HDPE), low close again
Polyethylene film (LDPE), polypropylene disposable lunch-box (PP) and polystyrene foam (PS), waste old are spent, waste and old chemical industry is spun
Fabric to etc.；
2, raw material used in this technique is waste high polymer, is the chief component of municipal garbage, is solved
Problem of environmental pollution caused by useless high molecular polymer, has saved the energy, realizes the recycling of waste, change give up into
Treasured, while reducing super absorbent resin production cost.
3, traditional waste high polymer treatment technology severe reaction conditions, complicated, added value of product is low, and
It is also easy to produce pernicious gas.This technique simplifies consersion unit, simple for process, and reaction condition is mild, of low cost, and avoids
The generation of toxic gas.
4, water-absorbing resin prepared by this technique has good wettability power, pH sensibility, water retention property and recycling
Performance, the water absorbent rate in distilled water can reach 120-350 times, can be used as water-retaining agent, drier, in building curing agent and
Slow-released system etc..
With reference to the accompanying drawings of the specification with the embodiment content that the present invention is further explained.
Description of the drawings
To further appreciate that the present invention, the specific shape characteristic of present invention process flow and product is described below with attached drawing.
Fig. 1 is the process flow chart of the regenerating transformed multifunctional ceiling water-resin of waste high polymer；
Fig. 2 is multifunctional ceiling water-resin water retention property at different temperatures prepared by waste high polymer and its again
Multiple utility.(a) water retention property (b) under different temperatures reuses performance.
Specific implementation mode
The embodiments given below are intended to further illustrate the invention, but is not to be construed as to the scope of the present invention
Limitation, person skilled in art still falls within this hair according to some nonessential modifications and adaptations that foregoing invention is made
Bright protection domain.
Embodiment 1：
According to Fig. 1 flow charts, take 1.00g cleaned, dry, the waste and old mixed plastic after shearing-crushing is stirred at 115 DEG C
It is dissolved completely under conditions of mixing in 0.02L dimethylbenzene.Then 0.30g emulsifier span60 are added, stirring after ten minutes, is added
0.045g is dissolved in the initiator benzoyl peroxide of 4.20ml dimethylbenzene, continues stirring 10 minutes, closes reaction kettle.By system temperature
Degree is down to 95 DEG C, and the acrylic acid solution that 8.00g is neutralized to 80% through NaOH is then added dropwise at a slow speed, and 400rpm stirrings add after ten minutes
Enter the N of 1.00mL 0.20g/mL, N- methylene-bisacrylamide solution, adjustment system grease volume ratio is 1.1:1.0.Continue
Stirring 15 minutes reduces mixing speed to 200rpm, after reacting 3 hours, takes out product, with ethyl alcohol and water washing, 80 DEG C of drying
To constant weight, sieving is ground.Water absorbent rate of the product in distilled water and tap water is respectively 239.07g/g and 97.36g/g.
Embodiment 2
According to Fig. 1 flow charts, the above-mentioned waste and old mixed plastics of 1.00g are taken, 0.02L bis- is dissolved completely under 115 DEG C, stirring
In toluene.Then 0.36g emulsifier span60 are added, stirs 10 minutes, adds 0.048g and be dissolved in drawing for 5.22ml dimethylbenzene
Agent benzoyl peroxide is sent out, stirring after ten minutes, closes reaction kettle.It waits for that system temperature is down to 95 DEG C, 8.00g warps is added dropwise at a slow speed
NaOH is neutralized to 85% acrylic acid solution, and the N of 1.00mL 0.20g/mL, N- methylene is added in 400rpm stirrings after ten minutes
Bisacrylamide solution, adjustment system grease volume ratio are 1.1:1.0.Continue stirring 15 minutes, reduces mixing speed extremely
250rpm after reacting 3 hours, takes out product, with ethyl alcohol and water washing, 80 DEG C drying to constant weight, grinds sieving.Product is distilling
Water absorbent rate in water and tap water is respectively 310.02g/g and 116.12g/g.
Examples detailed above is only intended to clearly illustrate example, not to the limitation of embodiment.Used is waste and old
The various waste plastic based on low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene and polystyrene can be used in mixed plastic
Mixture.The present invention is not limited to the above embodiments, and the content can be implemented, and has good effect.
Claims (5)
1. a kind of method preparing water-absorbing resin using waste high polymer, specifically includes the following steps：
(1) pretreatment procedure：Waste high polymer material is cleaned first, it is dry after shearing-crushing to 1-5 centimetres,
The leftover pieces generated in macromolecule material product production process can be used directly；
(2) dissolution process：Above-mentioned cleaning, broken waste high polymer are taken, is placed in reaction kettle, solvent is added, is led to
Enter nitrogen displaced air, open condensing reflux, be warming up to set temperature, opens mechanical agitator, polyphosphazene polymer after 5-10 minutes
Object is closed all to dissolve；
(3) it emulsifies, cause process：Reaction kettle is opened, emulsifier and initiator is added, reaction completes emulsification after 0.5-1.0 hours
And initiation reaction；
(4) graft copolymerization process：System temperature is down to 85-105 DEG C, under agitation, is added dropwise and is arrived through NaOH solution neutralization
Degree of neutralization is the acrylic acid of 65%-85%, is stirred 10 minutes；
(5) cross-linking reaction process：Reaction kettle is opened, crosslinking agent is added, the grease volume ratio for adjusting system is 1.0-1.3:1.0
Afterwards, reaction kettle is sealed；It is quickly stirred according to 400-450rpm 0.5 hour, after forming stable reaction system, in 100-400rpm
Lower reaction completes reaction after 1.0-3.0 hours；
(6) product cleaning procedure：After reaction, product is taken out from reaction kettle, is cleaned repeatedly with second alcohol and water, at 80 DEG C
It is lower that drying to constant weight.Cleavable at bulk or shape of claying into power according to purposes, packaging is finished product.
2. a kind of method preparing water-absorbing resin using waste high polymer according to right 1, it is characterized in that：Step
(2) solvent described in is xylene solution, and reaction temperature is 115-120 DEG C.
3. a kind of method preparing water-absorbing resin using waste high polymer according to right 1, it is characterized in that：Step
(3) emulsifier being added in is span60, and addition is equivalent to the 30-70% of waste high polymer weight；What is be added draws
It is benzoyl peroxide to send out agent, and addition is equivalent to the 3.0-5.5% of waste high polymer weight.
4. a kind of method preparing water-absorbing resin using waste high polymer according to right 1, it is characterized in that：Step
(4) addition of acrylic acid described in is equivalent to 2-8 times of waste high polymer weight.
5. a kind of method preparing water-absorbing resin using waste high polymer according to right 1, it is characterized in that：Step
(5) crosslinking agent described in is N, N- methylene-bisacrylamide aqueous solutions, and addition is equivalent to waste high polymer weight
The 10-30% of amount.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810371137.6A CN108530581A (en) | 2018-04-24 | 2018-04-24 | A method of preparing water-absorbing resin using waste high polymer |
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| CN201810371137.6A CN108530581A (en) | 2018-04-24 | 2018-04-24 | A method of preparing water-absorbing resin using waste high polymer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110041130A (en) * | 2019-04-30 | 2019-07-23 | 邵淑华 | A kind of preparation method of plant nutrient functional composite material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687164A (en) * | 2005-04-12 | 2005-10-26 | 南京师范大学 | Method for synthesizing high water absorption resin from rubber powder |
| CN107189016A (en) * | 2017-06-07 | 2017-09-22 | 中国科学院生态环境研究中心 | The technique that waste or used plastics prepare the super absorbent material of both sexes |
-
2018
- 2018-04-24 CN CN201810371137.6A patent/CN108530581A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687164A (en) * | 2005-04-12 | 2005-10-26 | 南京师范大学 | Method for synthesizing high water absorption resin from rubber powder |
| CN107189016A (en) * | 2017-06-07 | 2017-09-22 | 中国科学院生态环境研究中心 | The technique that waste or used plastics prepare the super absorbent material of both sexes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110041130A (en) * | 2019-04-30 | 2019-07-23 | 邵淑华 | A kind of preparation method of plant nutrient functional composite material |
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