Preparation method of controlled-degradation high-hygroscopicity resin
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A super absorbent resin and monomer technology, applied in the field of functional polymer materials to achieve the effect of recycling
Inactive Publication Date: 2012-02-01
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
However, there have been no reports on superabsorbent resins with controllable degradation rates.
Method used
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Embodiment 1
[0027] First, α-cyclodextrin (4.86g) and p-hydroxyazobenzene (1g) were reacted with acryloyl chloride to prepare α-cyclodextrin and azobenzene with double bonds, and then the two were added to 10mL In the N, N-dimethylformamide (DMF), stirring at a constant speed for 1 hour, the host-guest clathrate monomer was obtained. The monomer does not need to be separated from the dispersion, and can be directly added to the system for reaction.
[0028] Acrylic acid (21.6 g) was dissolved in 100 mL of DMF, and 10 mL of 70% NaOH solution was added dropwise at low temperature. After warming up to room temperature, add acrylamide (7.1 g), host-guest monomer dispersion liquid, stir well, then add 0.1 g of azobisisobutyronitrile (AIBN), and polymerize at 50°C for 4 hours. Remove the solvent, dry at 120°C for 3 hours, and pulverize to obtain a controllable-degradable superabsorbent resin.
[0029] The resin can be rapidly degraded under ultraviolet light irradiation, and the degraded resin...
Embodiment 2
[0031] First, β-cyclodextrin (5.67g) and ferrocenecarbonyl chloride (1.25g) were reacted with acryloyl chloride and allyl alcohol to prepare β-cyclodextrin with double bond and ferrocene with double bond, and then the two The latter was added into 10 mL of N,N-dimethylformamide (DMF), and stirred at a constant speed for 1 hour to obtain a host-guest inclusion compound monomer. The monomer does not need to be separated from the dispersion, and can be directly added to the system for reaction.
[0032] Acrylic acid (21.6 g) was dissolved in 100 mL of DMF, and 10 mL of 70% NaOH solution was added dropwise at low temperature. After warming up to room temperature, add acrylamide (7.1g), host-guest monomer dispersion and N,N-methylenebisacrylamide (1.5g), stir evenly, then add azobisisobutyronitrile (AIBN) 0.1 g, polymerized at 50°C for 4 hours. Remove the solvent, dry at 120°C for 3 hours, and pulverize to obtain a controllable-degradable superabsorbent resin.
[0033] The resin...
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Abstract
The invention discloses a preparation method of controlled-degradation high-hygroscopicity resin. The preparation method comprises the following steps of: adding an acrylic acid monomer, a host / guest identification monomer and a functional monomer to a dispersion medium, uniformly mixing, then adding a cross-linking agent and an initiator, and polymerizing under a certain condition to obtain the high-hygroscopicity resin. The preparation method has the advantages that: the identification effect among the host and guest molecules in the polymer chain of the prepared resin can be controlled by changing the external conditions, and the degradation speed of the high-hygroscopicity resin is further controlled, therefore, the degradation time of the high-hygroscopicity resin can be adjusted to be adapted to different completion time during the oil-gas field construction; and under certain conditions, the host and guest molecules in the molecular chain of the degraded resin are compounded to form the high-hygroscopicity resin, thereby achieving the recycling effect. The obtained product can be applied to oil-gas field plugging agents, agricultural water-retaining corrosion inhibitors, soil improvement agents and the like.
Description
technical field [0001] The invention relates to a preparation method of a controllable degradable polymer superabsorbent resin, which belongs to the field of functional polymer materials. Background technique [0002] Superabsorbent resin, also known as high-strength water-absorbent, is a new type of functional polymer material developed in the past 30 years. It is a functional polymer material with a network structure of various geometric shapes. It is very easy to absorb water and swell. It can absorb water hundreds to thousands of times its own weight in a short period of time and form an elastic gel with a certain strength. glue. The resin after water absorption does not dehydrate or dehydrates little under pressure. It has the advantages of simple use, stable structure, non-toxic and tasteless, and can be used repeatedly. Therefore, it is widely used in many fields such as agriculture, forestry, medical and health, environmental protection, chemical industry, building...
Claims
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Application Information
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