CN101747466A - Cross-linking agent-free ultraviolet light initiation preparation of sodium polyacrylate water absorption resin with high salt resistance - Google Patents
Cross-linking agent-free ultraviolet light initiation preparation of sodium polyacrylate water absorption resin with high salt resistance Download PDFInfo
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- CN101747466A CN101747466A CN200810073019A CN200810073019A CN101747466A CN 101747466 A CN101747466 A CN 101747466A CN 200810073019 A CN200810073019 A CN 200810073019A CN 200810073019 A CN200810073019 A CN 200810073019A CN 101747466 A CN101747466 A CN 101747466A
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- water absorption
- sodium polyacrylate
- salt resistance
- high salt
- absorption resin
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Abstract
The invention aims to develop a cross-linking agent-free ultraviolet light initiation polymerization method of sodium polyacrylate water absorption resin with high salt resistance, which has the advantages of environmental protection, energy saving and simple technological conditions. Compared with an inverse emulsion polymerization method, an inverse suspension polymerization method, a water solution chemical polymerization method and a graft polymerization method, the method of the invention has the characteristics of simple technological processes, high product purity, short synthesizing time, no solvent contamination, simple equipment, no need of nitrogen conservation and post treatment, easy industrialization, lower cost and the like. The sodium polyacrylate water absorption resin with high salt resistance, which is prepared by the polymerization method of the invention, has the following properties: the ionized water absorption rate is 3052-3120g/g, the normal saline (0.9% NaCl water solution) absorption rate is 320-440g/g, the rainwater (pH is about 6) absorption rate is 2260g/g, the artificial urine absorption rate is 120-200g/g, and the artificial blood absorption rate is 270-350g/g.
Description
Technical field
The present invention relates to a kind of absorbent resin, belong to the agricultural water-absorbing resin of high-salt tolerance.
Background technology
The current agricultural development of China is faced with very stern reality, and water resources is very poor, and severe water and soil erosion has also been brought serious ecological environment problem simultaneously; On the other hand, China's water utilization rate is not high, and wasting phenomenon is comparatively serious.Therefore, rationally efficiently utilizing limited water resource, the water-saving agricultural of realization will be an inexorable trend of China's agricultural development.In numerous water conservation and moisture-holding technical measures, the chemical water-saving technology that develops rapidly in recent years is that the application of super absorbent resin (SAR) is just more and more paid attention to by people.SAR is as a kind of novel high polymer material, can be in fields such as agricultural, forestry, water conservancy, improving desert performances keeping crop seedling from drought, increasing both production and income, improve the soil, check winds and fix drifting sand, multiple function such as soil conservation, thereby generally believed in the world be after chemical fertilizer, agricultural chemicals, mulch film the 4th be hopeful the agrochemicals goods accepted by the peasant most.
People such as USDA north research centre C.R.Russell at first began one's study from starch-grafted vinyl cyanide in 1961, thereafter people such as G.F.Fanta proceeded the research of starch-grafted vinyl cyanide on the basis of forefathers' research, and had at first delivered the paper that the starch conversion material has superior water-retaining capacity in 1966.The research of China's super absorbent resin is since early 1980s, successively the water-retaining agent performance and the synthetic method of starch system, fiber system, synthetic system are studied from 1981 as Hunan University Of Xiangtan, the patent and the bibliographical information of after this domestic research super absorbent resin emerge in an endless stream.The method of polymeric acrylic acid sodium has much at present, and its traditional polymerization process has reversed emulsion polymerization, inverse suspension polymerization, methods such as chemistry of aqueous solution polymerization and graft polymerization method.These method synthesizing high-hydroscopicity sodium polyacrylates need initiator, organic solvent, linking agent, logical nitrogen etc. usually, and have following shortcoming: the reaction times is longer, product purity is not high, discharging of waste liquid and product contamination that aftertreatment processing complicated and organic disperse phase can bring inevitably, its product salt tolerance is relatively poor.
Research contents
The objective of the invention is to develop a kind of environmental protection, energy-conservation, processing condition are simple, have the synthetic method of high-salt tolerance vinylformic acid salt absorbent resin.In contrast to reversed emulsion polymerization, the inverse suspension polymerization method, it is simple that chemistry of aqueous solution polymerization and graft polymerization method have technological process, the product purity height, generated time is short, solvent-free pollution, and equipment is simple, need not to protect nitrogen and aftertreatment, easily industrialization, characteristics such as cost is lower.
Technical scheme of the present invention: with vinylformic acid, sodium hydroxide is polymerization single polymerization monomer; the employing wavelength is that 365nm, power are that the straight pipe type ultraviolet high-pressure mercury lamps of 1000W is that polymerization causes light source; under open environment, nitrogen-less protection, polymerization makes sodium polyacrylate water absorption resin with high salt resistance.
Converging operation step: with demarcating in the good sodium hydroxide solution and vinylformic acid, degree of neutralization is controlled at 77.5%, make that Acrylic Acid Monomer and acrylate monomers reach certain proportion in the reaction system, at room temperature be placed on the distance of ultraviolet high-pressure mercury lamps 25～35cm, irradiation 20～30min time, get the rubber-like elasticity thin slice, be placed on blowing-type loft drier (90 ℃) oven dry after shredding, (60 orders～80 orders) are pulverized with ball mill in dry back.
The sodium polyacrylate water absorption resin with high salt resistance that makes, it inhales the deionized water rate is 3052～3120g/g, inhaling physiological saline (the 0.9%NaCl aqueous solution) rate is 320～440g/g, inhaling rainwater (pH is about 6) rate is 2260g/g, inhaling the artificial urine rate is 120～200g/g, and inhaling artificial blood rate is 270～350g/g.
Claims (7)
- The present invention be a kind of be initiator with the UV-light, do not add under the situation of linking agent and other any reagent and carry out polymerization, a kind of method of preparation sodium polyacrylate water absorption resin with high salt resistance.
- 2. press the preparation method of claims 1 described sodium polyacrylate water absorption resin with high salt resistance, it is characterized in that: raw material is vinylformic acid and sodium hydroxide.
- 3. press the preparation method of claims 1 described sodium polyacrylate water absorption resin with high salt resistance, it is characterized in that: do not add chemical substances such as any light trigger and linking agent.
- 4. press the preparation method of claims 1 described sodium polyacrylate water absorption resin with high salt resistance, it is characterized in that: used ultraviolet lamp is wavelength 365nm, and power is 1000W straight pipe type high voltage mercury lamp.
- 5. press the preparation method of claims 1 described sodium polyacrylate water absorption resin with high salt resistance, it is characterized in that: polyreaction is carried out under open environment, need not nitrogen protection.
- 6. press the preparation method of claims 1 described sodium polyacrylate water absorption resin with high salt resistance, it is characterized in that: operation steps is, with in the sodium hydroxide solution and vinylformic acid, make that Acrylic Acid Monomer and acrylate monomers reach certain proportion (degree of neutralization is 77.5%) in the reaction system, at room temperature be placed on the distance of ultraviolet high-pressure mercury lamps 25～35cm, irradiation 20～30min time, take out the back oven dry, pulverize (60 orders～80 orders).
- 7. press the sodium polyacrylate water absorption resin with high salt resistance of claims 1 described method preparation, it is characterized in that: it inhales the deionized water rate is 3052～3120g/g, inhaling physiological saline (the 0.9%NaCl aqueous solution) rate is 320～440g/g, inhaling rainwater (pH is about 6) rate is 2260g/g, inhaling the artificial urine rate is 120～200g/g, and inhaling artificial blood rate is 270～350g/g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810073019A CN101747466A (en) | 2008-12-03 | 2008-12-03 | Cross-linking agent-free ultraviolet light initiation preparation of sodium polyacrylate water absorption resin with high salt resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810073019A CN101747466A (en) | 2008-12-03 | 2008-12-03 | Cross-linking agent-free ultraviolet light initiation preparation of sodium polyacrylate water absorption resin with high salt resistance |
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| Publication Number | Publication Date |
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| CN101747466A true CN101747466A (en) | 2010-06-23 |
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| CN200810073019A Pending CN101747466A (en) | 2008-12-03 | 2008-12-03 | Cross-linking agent-free ultraviolet light initiation preparation of sodium polyacrylate water absorption resin with high salt resistance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617781A (en) * | 2012-03-16 | 2012-08-01 | 珠海农神生物科技有限公司 | Synthesis method for resin with high water absorbability |
| CN105061961A (en) * | 2015-08-26 | 2015-11-18 | 北京理工大学 | Salt tolerance super water-absorbent resin |
| CN106800615A (en) * | 2017-02-09 | 2017-06-06 | 山东大学 | A kind of preparation method of polyacrylic water-loss reducer |
| CN111333238A (en) * | 2020-03-06 | 2020-06-26 | 中国石油大学(华东) | Method for desalinating sea water |
-
2008
- 2008-12-03 CN CN200810073019A patent/CN101747466A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102617781A (en) * | 2012-03-16 | 2012-08-01 | 珠海农神生物科技有限公司 | Synthesis method for resin with high water absorbability |
| CN102617781B (en) * | 2012-03-16 | 2014-12-31 | 珠海农神生物科技有限公司 | Synthesis method for resin with high water absorbability |
| CN105061961A (en) * | 2015-08-26 | 2015-11-18 | 北京理工大学 | Salt tolerance super water-absorbent resin |
| CN106800615A (en) * | 2017-02-09 | 2017-06-06 | 山东大学 | A kind of preparation method of polyacrylic water-loss reducer |
| CN111333238A (en) * | 2020-03-06 | 2020-06-26 | 中国石油大学(华东) | Method for desalinating sea water |
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Open date: 20100623 |