Synthesis and swelling behaviors of microcrystal muscovite composite superabsorbent by photopolymerization

Wan, Tao; Ling, Liming; Huang, Runqiu; Wu, Daqing; Tang, Li; Xiong, Jing; Chen, Qiaohe

doi:10.1007/s11595-016-1345-4

Cited by 6 publications

(7 citation statements)

References 26 publications

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“…[10][11][12][13][14][15][16][17] Among them, the synthesis by UV initiated polymerization has received considerable attention because of the short reaction time, low energy consumption., easy control of reaction process and the "5E" characteristics, that is, economical, efficient, energy saving, environment friendly of such light initiated reactions and the rapid curing, even at ambient temperatures, of the resultant materials. [18][19][20] In recent years, there have been studies on the preparation of superabsorbent resins (or hydrogels) by UV light initiation, but most of them used initiators and cross-linking agents, 14,[21][22][23] and the water absorption capacity of the prepared polymer has not been significantly improved. There are few reports on the study of photoinitiated polymer superabsorbent materials without initiators and cross-linkers.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, there have been studies on the preparation of superabsorbent resins (or hydrogels) by UV light initiation, but most of them used initiators and cross‐linking agents, 14,21–23 and the water absorption capacity of the prepared polymer has not been significantly improved. There are few reports on the study of photo‐initiated polymer superabsorbent materials without initiators and cross‐linkers.…”

Section: Introductionmentioning

confidence: 99%

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Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Sawut

Simayi

Zhang

et al. 2022

Polymers for Advanced Techs

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The self crosslinking polyacrylic acid (PAAsc) superabsorbent resins were prepared by UV irradiation without crosslinking agents and initiators. The effects of reaction factors on water absorbency and gel content of resins were investigated. The mechanism of self crosslinking polymerization was studied by means of 1H NMR and ESR, while the structure and morphology of the resins were characterized by IR, NMR, and SEM. The results show that the polymerization mechanism and structure of PAAsc superabsorbent resins polymerized through light radiation is significantly different from those polymerized by initiators. The main chain of PAAsc contains double bonds and polar functional groups such as ether groups and ester groups, which improves the hydrophilicity of the main chain and significantly improves the liquid absorption ability of the superabsorbent material. Moreover, the swelling kinetics, salt‐resistance, pH sensitivity, and water retention capacity of the PAAsc superabsorbents were studied. Owing to the remarkable water absorbency, salt resistance property and water retention capacity, this superabsorbent material has a broad application prospect in agriculture.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Sawut

Simayi

Zhang

et al. 2022

Polymers for Advanced Techs

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“…Generation of free radicals using persulphate [75,100]. When polymerisation is initiated using UV (UV photopolymerisation), photosensitisers, such as 2,2-dimethoxy-2-phenylacetophenone (Irgacure 651) (BDK) [34,[102][103][104], 1hydroxycyclohexyl phenyl ketone [105], 4,4′-bi(dimethylamino)benzophenone (MK) [60] or 2-hydroxy-2-methylpropiophenone [106], are added to the monomers (Figure 11).…”

Section: Radical Polymerisation Of Vinyl Monomersmentioning

confidence: 99%

“…The emerging hydroxyl radical hydroxyl (OH • ) or hydroxyl radical (HO2 • ) initiates the polymerisation reaction of vinyl monomers (Figure 10). When polymerisation is initiated using UV (UV photopolymerisation), photosensitisers, such as 2,2-dimethoxy-2-phenylacetophenone (Irgacure 651) (BDK) [34,[102][103][104], 1hydroxycyclohexyl phenyl ketone [105], 4,4′-bi(dimethylamino)benzophenone (MK) [60] or 2-hydroxy-2-methylpropiophenone [106], are added to the monomers (Figure 11). When polymerisation is initiated using UV (UV photopolymerisation), photosensitisers, such as 2,2-dimethoxy-2-phenylacetophenone (Irgacure 651) (BDK) [34,[102][103][104], 1-hydroxycyclohexyl phenyl ketone [105], 4,4 ′ -bi(dimethylamino)benzophenone (MK) [60] or 2-hydroxy-2-methylpropiophenone [106], are added to the monomers (Figure 11).…”

Section: Radical Polymerisation Of Vinyl Monomersmentioning

confidence: 99%

Superabsorbent Hydrogels in the Agriculture and Reclamation of Degraded Areas

Sroka,

Sroka

2024

Sustainability

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Superabsorbent materials (SAPs) are crosslinked polymer networks composed of ionic and non-ionic monomers. SAPs can absorb and retain water solutions up to several hundred times their own weight. As a result of swelling, they form a gel that is insoluble in water, considered safe and decomposes over time. This review focuses on the synthesis, degradation and chemical composition of SAP materials, with particular emphasis on chemical substances that are soluble in water and can migrate into the environment. Numerous applications of natural and synthetic hydrogels in agriculture and the reclamation of degraded areas in preventing erosion, retention water, reducing leaching of colloidal soil components and plant protection products, fertilisers and mineral salts into surface waters have been described. The influence of SAPs on the microbial activity of soils is described. New trends in the search for environmentally friendly SAPs made of modified biopolymers and waste materials are presented, which not only increase yields, but also ensure sustainable agro-environmental development.

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“…Even though the maximum water retention capacity of the polymer gel was not high compared to other hydrogels or superabsorbent materials (about 50,000%) [47], the main purpose of this polymer gel is to adsorb uranium in seawater and the retention ability is just one of the factors that promote the performance of the polymer gel. This experiment also indicates the presence of the carbonyl group (COO-) which assists water diffusion into the interior of the polymer gel.…”

Section: Kinetic Of Water Absorptionmentioning

confidence: 93%

Synthesis of high efficiency amidoxime polymer adsorbents for uranium extraction from seawater by radiation-induced polymerization

Wongjaikham

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This study synthesized amidoxime polymer gel for uranium extraction from seawater through a polymerization process with gamma ray or UV-C radiation. The synthesis started with a mixture of acrylonitrile (AN) and methacrylic acid (MAA) monomers together with methylene bisacrylamide as a crosslinker and hydrogen peroxide in the case of UV radiation. The mixture was irradiated with gamma ray at various doses or UV-C for various durations. The resulting polymer gel was ground into fine particles and immersed in a hydroxylamine hydrochloride solution for 90 minutes in order to convert the chemical functional group from the cyano group into the amidoxime group. Results of laboratory-scale uranium extraction showed that for the case of amidoxime polymer gel prepared by gamma radiation, the ratio of monomer AN:MAA of 80:20, the amount of the crosslinker of 0.8 g/100 mL monomer, and 40 kGy gamma ray dose exhibited the highest uranium adsorption capacity. For the amidoxime polymer gel polymerized by UV-C radiation, the ratio of monomer AN:MAA of 80:20, the amount of the crosslinker of 1 g/100 mL monomer, hydrogen peroxide of 60 mL/100 mL monomer, and irradiation time of 8 hours exhibited the highest uranium adsorption capacity. The usage repeatability test indicated that after 8 cycles of repeated use, the polymer gel prepared from gamma ray did not show a decrease in the adsorption efficiency while the polymer gel prepared from UV-C showed a decrease in the adsorption efficiency of 50%. The field test results in natural seawater in front of Phuket Marine Biological Center (PMBC), Phuket province, Thailand for 8 weeks revealed that the polymer gel prepared from gamma ray exhibited the uranium adsorption of 0.05 mg/g while the polymer gel prepared from UV-C exhibited the uranium adsorption of 0.035 mg/g.

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Synthesis and swelling behaviors of microcrystal muscovite composite superabsorbent by photopolymerization

Cited by 6 publications

References 26 publications

Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Preparation, properties, self crosslinking mechanism, and characterization of UV initiated polyacrylic acid superabsorbent resins

Superabsorbent Hydrogels in the Agriculture and Reclamation of Degraded Areas

Synthesis of high efficiency amidoxime polymer adsorbents for uranium extraction from seawater by radiation-induced polymerization

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