CN101747467A - Ultraviolet light initiator preparation of polyvinyl alcohol crosslinking sodium polyacrylate high-salt tolerance absorbent resin - Google Patents
Ultraviolet light initiator preparation of polyvinyl alcohol crosslinking sodium polyacrylate high-salt tolerance absorbent resin Download PDFInfo
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- CN101747467A CN101747467A CN200810073020A CN200810073020A CN101747467A CN 101747467 A CN101747467 A CN 101747467A CN 200810073020 A CN200810073020 A CN 200810073020A CN 200810073020 A CN200810073020 A CN 200810073020A CN 101747467 A CN101747467 A CN 101747467A
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- absorbent resin
- sodium polyacrylate
- salt tolerance
- polyvinyl alcohol
- polymerization method
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Abstract
The invention aims at developing an ultraviolet light initiator polymerization method of polyvinyl alcohol crosslinking sodium polyacrylate high-salt tolerance absorbent resin, which is environmental-protection and energy-saving and has simple process condition; compared with the reverse emulsion polymerization method, reversed phase suspension polymerization method, aqueous solution chemical polymerization method and grafting polymerization method, the polymerization method in the invention has the characteristics of simple technology process, high product purity, short synthesis time, no solvent pollution, simple equipment, no need of nitrogen protection and aftertreatment, easy industrialization and low cost; the sodium polyacrylate absorbent resin prepared by the polymerization method has 3430-4100g/g of deionized water adsorption ratio, the physiological saline (0.9% NaCl aqueous solution) adsorption ratio is 340-405g/g, when the concentration of the solution is 0.5 percent, the adsorption rates to urea, potassium chloride and ammonium chloride solution are 1510g/g, 418g/g and 280g/g respectively; in addition, the polyvinyl alcohol crosslinking sodium polyacrylate high-salt tolerance absorbent resin has good water-adsorption reversibility and gel intensity.
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 the vinylformic acid salt water absorbent polymer of high-salt tolerance.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; with the polyvinyl alcohol is linking agent; 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 nitrogen-less protection and open environment, 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, add a certain amount of polyvinyl alcohol then, 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, (60～80 order) pulverized with ball mill in dry back.
The absorption resin of sodium polyacrylate that makes, it inhales the deionized water rate is 3430～4100g/g, inhaling physiological saline (the 0.9%NaCl aqueous solution) rate is 340～405g/g, in strength of solution is 0.5% o'clock, 1510g/g, 418g/g and 280g/g that the adsorption rate of urea, Repone K and ammonium chloride solution is respectively, and have absorb water preferably reversibility and gel-strength.
Claims (7)
- The present invention be a kind of be initiator with the UV-light, only add under polyvinyl alcohol crosslinked dose the situation and carry out polymerization, a kind of method of preparation high-salt tolerance absorbent resin sodium polyacrylate.
- 2. press the preparation method of claims 1 described high-salt tolerance absorbent resin sodium polyacrylate, it is characterized in that: raw material is vinylformic acid, sodium hydroxide and polyvinyl alcohol.
- 3. press the preparation method of claims 1 described high-salt tolerance absorbent resin sodium polyacrylate, it is characterized in that: only add the linking agent polyvinyl alcohol, and do not add chemical substances such as any light trigger.
- 4. press the preparation method of claims 1 described high-salt tolerance absorbent resin sodium polyacrylate, it is characterized in that: the ultraviolet lamp of usefulness is the straight pipe type high voltage mercury lamp of wavelength 365nm, power 1000W.
- 5. press the preparation method of claims 1 described high-salt tolerance absorbent resin sodium polyacrylate, 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 high-salt tolerance absorbent resin sodium polyacrylate, 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 in the reaction system, add a certain amount of polyvinyl alcohol then, 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 (60～80 order).
- 7. press the high-salt tolerance absorbent resin sodium polyacrylate of claims 1 described method preparation, it is characterized in that: it inhales the deionized water rate is 3430～4100g/g, inhaling physiological saline (the 0.9%NaCl aqueous solution) rate is 340～405g/g, in strength of solution is 0.5% o'clock, 1510g/g, 418g/g and 280g/g that the adsorption rate of urea, Repone K and ammonium chloride solution is respectively, and have absorb water preferably reversibility and gel-strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100730206A CN101747467B (en) | 2008-12-03 | 2008-12-03 | Ultraviolet light initiator preparation of polyvinyl alcohol crosslinking sodium polyacrylate high-salt tolerance absorbent resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100730206A CN101747467B (en) | 2008-12-03 | 2008-12-03 | Ultraviolet light initiator preparation of polyvinyl alcohol crosslinking sodium polyacrylate high-salt tolerance absorbent resin |
Publications (2)
| Publication Number | Publication Date |
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| CN101747467A true CN101747467A (en) | 2010-06-23 |
| CN101747467B CN101747467B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100730206A Expired - Fee Related CN101747467B (en) | 2008-12-03 | 2008-12-03 | Ultraviolet light initiator preparation of polyvinyl alcohol crosslinking sodium polyacrylate high-salt tolerance absorbent resin |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327203A (en) * | 2014-09-22 | 2015-02-04 | 湖州超能生化有限公司 | Sodium polyacrylate preparation method |
| CN114481619A (en) * | 2022-01-10 | 2022-05-13 | 南通大学 | Moisture-absorbing heating fabric and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1272352C (en) * | 2003-11-20 | 2006-08-30 | 余孟成 | Method for preparing partially crosslinked hydroexpansivity acrylate-acrylic acid copolymer |
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2008
- 2008-12-03 CN CN2008100730206A patent/CN101747467B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327203A (en) * | 2014-09-22 | 2015-02-04 | 湖州超能生化有限公司 | Sodium polyacrylate preparation method |
| CN114481619A (en) * | 2022-01-10 | 2022-05-13 | 南通大学 | Moisture-absorbing heating fabric and preparation method and application thereof |
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| CN101747467B (en) | 2012-05-23 |
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Granted publication date: 20120523 Termination date: 20121203 |