CN104448142A - High water-absorption resin - Google Patents
High water-absorption resin Download PDFInfo
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- CN104448142A CN104448142A CN201310427652.9A CN201310427652A CN104448142A CN 104448142 A CN104448142 A CN 104448142A CN 201310427652 A CN201310427652 A CN 201310427652A CN 104448142 A CN104448142 A CN 104448142A
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- starch
- absorbent resin
- super absorbent
- solution
- monomer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The present invention provides a high water-absorption resin, wherein a starch high water-absorption resin is adopted as the researched object, a starch-acrylic acid high water-absorption resin is prepared through an aqueous solution polymerization method, and the properties of the product are adjusted. According to the present invention, an aqueous solution free radical graft copolymerization method is adopted, an oxidation type initiator is adopted, H on the tertiary carbon of the starch molecule is removed so as to produce the free radical, the monomer is initiated, the starch-monomer free radical is formed, the starch-monomer free radical and the monomer are continuously subjected to chain-growth polymerization, and finally chain termination occurs, wherein cross-linking is performed between the chains through a cross-linking agent acrylamide, such that the whole polymer forms the network structure; and the production process does not adopt the nitrogen to protect, the starch gelatinization and the acrylic acid neutralization are subjected to linkage before the reaction, the solution is preheated, the partial oxygen in the solution is discharged, and the remaining heat during the starch gelatinization process is utilized, such that the energy source saving requirement is met, and the mass production can be achieved.
Description
Technical field
The present invention relates to chemical field, particularly a kind of super absorbent resin.
Background technology
Super absorbent polymer (Superabsorbent polymers, be called for short SAP, also super absorbent resin is, super-strong moisture absorbing machine, high water absorbency polymer), a kind ofly can absorb and retain the new functional macromolecule material wanting very large many liquid relative to itself quality, in recent years, super absorbent resin is widely used in oil-water separating agent, adsorbent for heavy metal, agricultural chemicals, fertilizer, the adjustment release material of spices, food fresh keeping material, the filtering material of artificial kidney, the artificial organs such as soft contact lens, medicine and medical treatment product, the sealing material that discharges water of building, the fireproof coating material etc. of buildings.Along with continually developing of Application Areas, the application of super absorbent resin will be more extensive.
A kind of preparation method of super absorbent resin is provided in patent CN102471394A, more specifically, a kind of preparation method of the super absorbent resin comprised the following steps is related to: formed and comprise the monomer composition that water-soluble vinyl unsaturated monomer and diameter are the non-reacted microparticle of 20nm ~ 1mm; And thermopolymerization or UV polymerization are carried out to described monomer composition.By adding microparticle to monomer, with formed make polymerization process or polymerization after moisture in super absorbent resin or the heat passage of discharging smoothly, thus the high-quality super absorbent resin presenting low water content and low temperature and physical properties excellence can be obtained.But this law Min Gaode shortcoming is that reaction process is complicated, and obtained super absorbent resin is easy in environment after using.
Summary of the invention
The invention provides a kind of super absorbent resin, object is to provide a kind of excellent property again can biodegradable super-strong water-absorbing material.
For reaching above object, the present invention by the following technical solutions:
The present invention take STARCH GRAFT POLYMER SUPER ABSORBENT RESIN as research object, has obtained Starch and Acrylic Acid super absorbent resin by water solution polymerization process, and have adjusted the performance of product.
First the present invention carries out vinylformic acid neutralization, and preparing mass concentration is in advance the aqueous sodium hydroxide solution of 25%, stand-by.Measuring quantitative vinylformic acid pours in beaker, then drips sodium hydroxide solution gradually, until the pH of acrylic acid solution is 6.5 (degree of neutralization is 80%-85%).
Then carry out starch pasting, quantitative deionized water adds in starch, is uniformly mixed into suspension, and controlling bath temperature is 80 ~ 90 DEG C, stirs gelatinization about 15 ~ 30min, and stirring is cooled to room temperature.Regulate bath temperature be 50 DEG C stand-by.
Finally carry out graft copolymerization, acrylamide is joined in neutralizer, obtain monomer solution, again pasted starch is added in the monomer solution of configuration, after stirring 20min, (dripping) adds a certain amount of ammonium persulfate aqueous solution, at temperature 50 ~ 60 DEG C react 2 ~ 3h, by product at 90 ~ 95 DEG C in more than oven drying 24h, pulverize to obtain clear, colorless or light yellow crystalline super absorbent resin.
Beneficial effect of the present invention is:
Super absorbent resin of the present invention produces and do not protect with nitrogen, link before the reaction pasted starch and in and vinylformic acid, preheating solution; discharge the partial oxidation in solution; and make use of remaining heat in starch pasting process, meet the requirement of energy conservation, can be mass-produced.The super absorbent resin that the present invention obtains does not repel microorganism, can be used as microbiological culture media.Starch material wide material sources used herein, kind is many, and output is large, cheap and easy to get, is applicable to scale operation.
Embodiment
Below in conjunction with principle and specific embodiment, the present invention is further elaborated:
Principles of Polymerization of the present invention are
Neutralization reaction:
Graft copolymerization:
Adopt the method for aqueous free radical graft copolymerization, utilizing oxidized form initiator, making the H on the tertiary carbon on starch molecule be produced free radical by seizing, then trigger monomer, form starch-monomer radical, continue to carry out chain growth polymerization with monomer, finally chain termination occurs.By linking agent acrylamide crosspolymer between chain and chain, make whole polymkeric substance reticulate structure, reaction formula as shown in Figure 1.
Specific embodiment 1:
1, vinylformic acid neutralization
Preparing mass concentration is in advance the aqueous sodium hydroxide solution of 25%, stand-by.Measuring quantitative vinylformic acid pours in beaker, then sodium hydroxide solution is dripped gradually, need carry out in cooling bath until the pH of acrylic acid solution is 6.5 (degree of neutralization is 80%-85%) whole process, and need constantly to stir, to control the temperature of exothermic heat of reaction speed and neutralization solution, temperature is advisable to be no more than 45 DEG C.Control temperature be in order to avoid the sodium acrylate monomers after vinylformic acid and neutralization thereof can Yin Wendu too high and produce hot auto-polymerization.
2, starch pasting
Take quantitative starch and put into beaker, add quantitative deionized water and stirring and be mixed into suspension, controlling bath temperature is 80 ~ 90 DEG C, stirs gelatinization about 15 ~ 30min, and stirring is cooled to room temperature.Regulate bath temperature be 50 DEG C stand-by.
3, graft copolymerization
Taking quantitative acrylamide joins in neutralizer, obtain monomer solution, again pasted starch is added in the monomer solution of configuration, after stirring 20min, (dripping) adds a certain amount of ammonium persulfate aqueous solution, 2 ~ 3h is reacted at temperature 50 ~ 60 DEG C, by product at 90 ~ 95 DEG C in more than oven drying 24h, pulverize to obtain clear, colorless or light yellow crystalline super absorbent resin.
Claims (5)
1. a super absorbent resin, is characterized in that: the present invention take STARCH GRAFT POLYMER SUPER ABSORBENT RESIN as research object, has obtained Starch and Acrylic Acid super absorbent resin by water solution polymerization process, and have adjusted the performance of product.
2. super absorbent resin according to claim 1, is characterized in that: first the present invention carries out vinylformic acid neutralization, and preparing mass concentration is in advance the aqueous sodium hydroxide solution of 25%, stand-by.
3. measuring quantitative vinylformic acid pours in beaker, then drips sodium hydroxide solution gradually, until the pH of acrylic acid solution is 6.5 (degree of neutralization is 80%-85%).
4. super absorbent resin according to claim 1, is characterized in that: then carry out starch pasting, and quantitative deionized water adds in starch, be uniformly mixed into suspension, controlling bath temperature is 80 ~ 90 DEG C, stirs gelatinization about 15 ~ 30min, and stirring is cooled to room temperature.
5. super absorbent resin according to claim 1, it is characterized in that: finally carry out graft copolymerization, acrylamide is joined in neutralizer, obtain monomer solution, be added in the monomer solution of configuration by pasted starch again, after stirring 20min, (dripping) adds a certain amount of ammonium persulfate aqueous solution, at temperature 50 ~ 60 DEG C, react 2 ~ 3h, by product at 90 ~ 95 DEG C in more than oven drying 24h, pulverize to obtain clear, colorless or light yellow crystalline super absorbent resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310427652.9A CN104448142A (en) | 2013-09-20 | 2013-09-20 | High water-absorption resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310427652.9A CN104448142A (en) | 2013-09-20 | 2013-09-20 | High water-absorption resin |
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| CN104448142A true CN104448142A (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310427652.9A Pending CN104448142A (en) | 2013-09-20 | 2013-09-20 | High water-absorption resin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622358A (en) * | 2020-12-23 | 2021-04-09 | 王飞 | Transparent writing quick-drying page film and preparation method thereof |
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2013
- 2013-09-20 CN CN201310427652.9A patent/CN104448142A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622358A (en) * | 2020-12-23 | 2021-04-09 | 王飞 | Transparent writing quick-drying page film and preparation method thereof |
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Application publication date: 20150325 |