CN103724536A - Water-absorbent resin synthesis technology by controlling using amount of crosslinking agent - Google Patents
Water-absorbent resin synthesis technology by controlling using amount of crosslinking agent Download PDFInfo
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- CN103724536A CN103724536A CN201210405340.3A CN201210405340A CN103724536A CN 103724536 A CN103724536 A CN 103724536A CN 201210405340 A CN201210405340 A CN 201210405340A CN 103724536 A CN103724536 A CN 103724536A
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Abstract
The invention discloses a water-absorbent resin synthesis technology by controlling the using amount of a crosslinking agent. The water-absorbent resin synthesis technology comprises the following steps: firstly weighing raw materials needed by synthesis according to a ratio, wherein the raw materials comprise acrylamide and 2-acrylyl amido-2-methyl propanesulfonic acid; (b) putting the acrylamide into a reaction container, adding distilled water, and stirring at high speed; (c) stewing for a period of time until hydration is completed for standby; (d) after the acrylamide is completely dissolved, adding the 2-acrylyl amido-2-methyl propanesulfonic acid and the crosslinking agent, continuing to perform high-speed stirring, implementing pre-reaction under constant temperature, and controlling the mass percentage of the crosslinking agent in a total reaction monomer to 0.04 percent; (e) pouring reaction mixed liquid into a mold, performing heating, implementing saponification in the water bath to form colloid, and ending the reaction. The technology can be used for successfully synthesizing high-performance water-absorbent resin; furthermore, by virtue of control on the using amount of the crosslinking agent in a synthesis process, the synthesis efficiency and the performance of the product are obviously improved.
Description
Technical field
The present invention relates to a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent.
Background technology
The character that material can absorb moisture in water is called water-absorbent.The water-absorbent of material represents with water-intake rate, and water-intake rate has quality water-intake rate and two kinds of method for expressing of volume water absorption rate.
In material, absorbing water minute sucks by open pores, therefore open porosity is larger, the water regain of material the more.Material water suction reaches volume water absorption rate when saturated, is the open porosity of material.
The water-absorbent of material is relevant with the porosity of material and pore character.For trickle open pore, porosity is larger, and water-intake rate is larger.The pore moisture of remaining silent can not be entered, although and opening macropore moisture easily enters, can not retain, can only soak hole wall, so water-intake rate is still less.The water-intake rate of various materials is very not identical, widely different, and as the water-intake rate of grouan only has 0.5%～0.7%, concrete water-intake rate is 2%～3%, and the water-intake rate of clay brick reaches 8%～20%, and the water-intake rate of timber can surpass 100%.
The character that material absorbs moisture in damp atmosphere is called water absorbability.Moist material also can be emitted moisture in dry air, and this claims water absorbability.The water absorbability of material represents with water ratio.Water ratio mean material internal the moisture heavy percentage that accounts for material dry weight.
The water absorbability of material changes with the humidity of air and the variation of envrionment temperature, and when atmospheric moisture is large and temperature is lower, the water ratio of material is just large, otherwise little.The water ratio when humidity of contained humidity and air balances each other in material, is called equilibrium moisture content.
Absorb the moisture of own wt hundred times to thousand times, nontoxic, harmless, pollution-free; Water-retaining capacity extra-heavy, water retention capacity extra-high-speed, the high-molecular weight polymer obtaining by acroleic acid polymerization → high water-retaining capacity, the balance of absorbed dose under high loading, absorb water minute and can not be extruded by simple physical method, and can repeatedly release water, water suction.Be applied to agroforestry aspect, can form at plant root " miniature reservoir ".Super absorbent resin, except water suction, can also absorb fertilizer, agricultural chemicals, and discharge slowly to increase fertilizer efficiency and drug effect.Super absorbent resin, with its superior performance, is widely used in agroforestry production, urban landscaping, drought-resistant water-preserving, defends and controls sand, and brings into play huge effect.In addition, super absorbent resin also can be applicable to many fields such as health care, oil production, material of construction, communications and transportation.
In the synthesis technique of absorbent resin, dosage of crosslinking agent will directly affect the performance of combined coefficient and product, and suitable dosage of crosslinking agent of how to confirm seems particularly crucial to the synthetic of absorbent resin.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent is provided, this synthesis technique can successfully synthesize high performance absorbent resin, and in building-up process, pass through to control dosage of crosslinking agent, thereby obviously improved the performance of combined coefficient and product.
Object of the present invention is achieved through the following technical solutions: a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent, comprises the following steps:
(a) first, according to proportioning, take synthetic required starting material, starting material comprise acrylamide and 2-acrylamide-2-methylpro panesulfonic acid;
(b) acrylamide is placed in to reaction vessel, adds distilled water, high-speed stirring;
(c) standing for some time, aquation is complete, stand-by;
(d) until completely dissolved, add 2-acrylamide-2-methylpro panesulfonic acid and linking agent, continue high-speed stirring, constant temperature pre-reaction, and to control the mass percent that linking agent accounts for total reaction monomer be 0.03%～0.05%;
(e) reaction mixture is poured in mould, heated up, water bath with thermostatic control saponification, colloid forms, and reaction finishes.
Described reaction vessel is beaker.
In described step (c), time of repose is 60 minutes.
In described step (d), constant temperature pre-reaction temperature is 50 ℃.
In described step (d), constant temperature pre-reaction time is 150 minutes.
In described step (d), the mass percent that control linking agent accounts for total reaction monomer is 0.03%.
In step (d), the mass percent that control linking agent accounts for total reaction monomer is 0.05%.
In step (d), the mass percent that control linking agent accounts for total reaction monomer is 0.04%.
In sum, the invention has the beneficial effects as follows: can successfully synthesize high performance absorbent resin, and in building-up process, pass through to control dosage of crosslinking agent, thereby obviously improve the performance of combined coefficient and product.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment 1:
A kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent the present invention relates to, comprises the following steps:
(a) first, according to proportioning, take synthetic required starting material, starting material comprise acrylamide and 2-acrylamide-2-methylpro panesulfonic acid;
(b) acrylamide is placed in to reaction vessel, adds distilled water, high-speed stirring;
(c) standing for some time, aquation is complete, stand-by;
(d) until completely dissolved, add 2-acrylamide-2-methylpro panesulfonic acid and linking agent, continue high-speed stirring, constant temperature pre-reaction, and to control the mass percent that linking agent accounts for total reaction monomer be 0.04%;
(e) reaction mixture is poured in mould, heated up, water bath with thermostatic control saponification, colloid forms, and reaction finishes.
Described reaction vessel is beaker.
In described step (c), time of repose is 60 minutes.
In described step (d), constant temperature pre-reaction temperature is 50 ℃.
In described step (d), constant temperature pre-reaction time is 150 minutes.
In order to obtain best dosage of crosslinking agent, the present invention has done the impact test of dosage of crosslinking agent on the resin property of the high-absorbent material being synthesized in synthesis technique, known by result: along with the increase of dosage of crosslinking agent, the space that can hold water molecules in the elastic dilatation power of resin macromolecular chain and three-dimensional network was subject to the restriction of multiple network node, water molecules is difficult to enter, caused the decline of liquid absorbency rate, can find out, when dosage of crosslinking agent is low to moderate 0.04wt%, liquid absorbency rate is the highest, and gel is swelling well still.Therefore can infer that the bentonite lamella structure of peeling off in polymeric matrix has caused increasing of crosslinked node.
To sum up, in the present embodiment, the mass percent that control linking agent accounts for total reaction monomer is 0.04%.
Embodiment 2:
The difference of the present embodiment and embodiment 1 is only, controlling the mass percent that linking agent accounts for total reaction monomer is 0.03%, and other parts of the present embodiment are identical with embodiment 1, repeat no more.
Embodiment 3:
The difference of the present embodiment and embodiment 1 is only, controlling the mass percent that linking agent accounts for total reaction monomer is 0.05%, and other parts of the present embodiment are identical with embodiment 1, repeat no more.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (8)
1. an absorbent resin synthesis technique of controlling dosage of crosslinking agent, is characterized in that, comprises the following steps:
(a) first, according to proportioning, take synthetic required starting material, starting material comprise acrylamide and 2-acrylamide-2-methylpro panesulfonic acid;
(b) acrylamide is placed in to reaction vessel, adds distilled water, high-speed stirring;
(c) standing for some time, aquation is complete, stand-by;
(d) until completely dissolved, add 2-acrylamide-2-methylpro panesulfonic acid and linking agent, continue high-speed stirring, constant temperature pre-reaction, and to control the mass percent that linking agent accounts for total reaction monomer be 0.03%～0.05%;
(e) reaction mixture is poured in mould, heated up, water bath with thermostatic control saponification, colloid forms, and reaction finishes.
2. a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent according to claim 1, is characterized in that, described reaction vessel is beaker.
3. a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent according to claim 1, is characterized in that, in described step (c), time of repose is 60 minutes.
4. a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent according to claim 1, is characterized in that, in described step (d), constant temperature pre-reaction temperature is 50 ℃.
5. a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent according to claim 1, is characterized in that, in described step (d), constant temperature pre-reaction time is 150 minutes.
6. according to a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent described in any one in claim 1～5, it is characterized in that, in described step (d), the mass percent that control linking agent accounts for total reaction monomer is 0.03%.
7. according to a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent described in any one in claim 1～5, it is characterized in that, in step (d), the mass percent that control linking agent accounts for total reaction monomer is 0.05%.
8. according to a kind of absorbent resin synthesis technique of controlling dosage of crosslinking agent described in any one in claim 1～5, it is characterized in that, in step (d), the mass percent that control linking agent accounts for total reaction monomer is 0.04%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210405340.3A CN103724536A (en) | 2012-10-11 | 2012-10-11 | Water-absorbent resin synthesis technology by controlling using amount of crosslinking agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210405340.3A CN103724536A (en) | 2012-10-11 | 2012-10-11 | Water-absorbent resin synthesis technology by controlling using amount of crosslinking agent |
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| CN103724536A true CN103724536A (en) | 2014-04-16 |
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Application publication date: 20140416 |