Investigation of Water Uptake Behavior of Superabsorbent Polymers Composed of N‐Vinyl‐2‐pyrrolidone and Partially Neutralized Acrylic Acid

Bajpai, Sunil; Bajpai, M.; Sharma, Leena

doi:10.1080/10601320600814648

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…It has been shown that the concentration of cross linkers in the gel determines the swelling of the gels [23]. The water absorbency of SAPs also depends on the degree of neutralization of monomer acid, the amount of initiator and the volume of polymerization mixture [7]. Since the chemical details of Luquasorb have not been published so far, it is not possible to discern the specific reasons for this unexpected result.…”

Section: Discussionmentioning

confidence: 95%

“…They have the potential to absorb water many times their weight, retain it and supply it to plant roots during water stress, thereby enhancing plant survival and growth [2 -6]. The water absorbency of super absorbent polyacrylates (SAPs) depends on the degree of neutralization of monomer acid, the amount of initiator and the volume of polymerization mixture [7]. The addition of hydrogel to soils can improve not only its water holding capacity [1], but also the supply of plant available water [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Hydrogel Amendment to Different Soils on Plant Available Water and Survival of Trees under Drought Conditions

Agaba¹,

Orikiriza

Esegu

et al. 2010

CLEAN Soil Air Water

123

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Dedicated to Aloys Hüttermann, to his honor and memoryThe effect of super absorbent polyacrylate (SAP) hydrogel amendment to different soil types on plant available water (PAW), evapotranspiration and survival of Eucalyptus grandis, Eucalyptus citriodora, Pinus caribaea, Araucaria cunninghamii, Melia volkensii, Grevillea robusta, Azadirachta indica, Maesopsis eminii and Terminalia superba was investigated. The seedlings were potted in 3 kg size polythene bags filled with sand, loam, silt loam, sandy loam and clay soils, amended at 0 (control), 0.2 and 0.4% w/w hydrogel. The tree seedlings were allowed to grow normally with routine uniform watering in a glass house set up for a period of eight weeks, after which they were subjected to drought conditions by not watering any further. The 0.4% hydrogel amendment significantly (p a 0.05) increased the PAW by a factor of about three in sand, two fold in silt loam and one fold in sandy loam, loam and clay soils compared to the control. Similarly, the addition of either 0.2 or 0.4% hydrogel to the five soil types resulted in prolonged tree survival compared to the controls. Araucaria cunninghammi survived longest at 153 days, while Maesopsis eminii survived least (95 days) in sand amended at 0.4% after subjection to desiccation. Evapotranspiration was reduced in eight of the nine tree species grown in sandy loam, loam, silt loam and clay soils amended at 0.4% hydrogel. It is probable that soil amendment with SAP decreased the hydraulic soil conductivity that might reduce plant transpiration and soil evaporation.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Effects of Hydrogel Amendment to Different Soils on Plant Available Water and Survival of Trees under Drought Conditions

Agaba¹,

Orikiriza

Esegu

et al. 2010

CLEAN Soil Air Water

123

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“…An optimal cross-linker concentration was also demonstrated for poly(acrylic acid)/organo-attapulgite superabsorbent polymers [43], whereas a continuous decrease in water retention was measured with an increase in the cross-linker moiety for their copolymer made from N-vinyl-2-pyrrolidone and partially neutralized acrylic acid [37].…”

Section: Saps As Water Absorbing Materialsmentioning

confidence: 93%

“…For the design of this special type of soil conditioner, a variety of different polymers have been developed and tested, which included guar [16], starch, polyacrylate and poly(ethylene glycol) [17], alginate-poly(sodium acrylate-coacrylamide) [18], alginate-g-poly(sodium acrylate)/kaolin [19], carboxymethylchitosan-g-poly(acrylic acid) copolymer [20], acrylic acid and maleic anhydride-copolymerizate [21], polyvinylalcohol-phosphate [22], acrylic acid-polyvinyl alcohol copolymer [23], polyacrylamide [24 -27], acrylamide/Nvinylpyrrolidone/3(2-hydroxyethyl carbamoyl) acrylic acid [28], poly(acrylamide-co-methyl methacrylate) [29], polyacrylamide/sodium alginate [30], polyacrylic acid [31], sodium polyacrylate, prepared by solution polymerization with N,N-methylene-bisacrylamide (bisAM) as a cross-linking agent, surface cross-linked by ethylene glycol diglycidyl ether (EGDE) [32], poly(sodium acrylate) cross-linked with modified poly(ethylene glycol) [33], sulfonated polystyrene [34], hydrolysed acrylonitrile sulfonated polystyrene [35], poly(ethylene oxide) [36], n-vinyl-2-pyrrolidone and partially neutralized acrylic acid [37], poly(tartaramide)s, poly(ester-amide)s containing oxyethylene segments [38], poly(aspartic acid) and its derivatives [39,40] poly(acrylic acid)/attapulgite/sodium humate [41].…”

mentioning

confidence: 99%

Application of Superabsorbent Polymers for Improving the Ecological Chemistry of Degraded or Polluted Lands

Hüttermann¹,

Orikiriza

Agaba

2009

CLEAN Soil Air Water

200

122

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About 3.5 billion ha of land, which amounts to almost 30% of the total solid land of the world, has been degraded by human activities. The ecological restoration of these lands is a major challenge for mankind since they are the only option left for increasing the amount of arable land and producing food for the ever growing worldwide population. One common feature of these degraded lands is the fact that their organic soil matter is degraded also. Rainfall therefore, changes from a blessing to a menace since it is not kept in the soil and therefore causes erosion. A solution for the restoration of these lands could be the application of superabsorbent polymers (SAPs) to these soils. These substances are like ‘artificial humus’ as they are hydrophilic and contain carboxylic groups. This enables them to bind cations and water. They have the following advantages for the restoration of degraded lands. They increase the plant available water in the soil which enables the plants to survive longer under water stress. SAP amendment to soils reduces the evapotranspiration rate of the plants. They induce a significantly higher growth rate in plants growing on SAP amended soil. They bind heavy metals and mitigate their action on plants. They mitigate the effects of salinity. The benefits of SAP amendment to soils substantially outweigh their costs.

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“…Starch-modified poly(acrylic acid) [15] Hydrogels based on polyacrylamide and natural cashew tree gum [34] Wheat straw cellulose hydrogel based hydrogel [35] Hyaluronate Gum ghatti-poly(acrylic acid-aniline) hydrogels [42] Acrylamide and hyper-branched polyethyleneimine based hydrogel [43] Acrylic acid-co-acrylic amide based hydrogel [44] Poly(acrylamide-co-acrylic Acid)/AlZnFe 2 O 4 [45] Poly(ethylene glycol) and Poly(acrylate) copolymer [46] Partially neutralized acrylic acid and NVP [47] Oxyethylene segments of poly(ester-amide) and poly(tartaramide) [48] 9…”

Section: Representative Hydrogel Referencementioning

confidence: 99%

Smart Polymer Hydrogels as Matrices for the Controlled Release Applications in Agriculture Sector

Venkatachalam¹,

Pushparaju²

2023

Hydrogels - From Tradition to Innovative Platforms With Multiple Applications

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Synthetic polymer hydrogels and modified natural polymer hydrogels are widely and increasingly used in agriculture, health care textiles, effluent treatment, drug delivery, tissue engineering, civil concrete structure, etc. Among them, the use of hydrogels in agricultural and horticultural sectors as matrices for the controlled release of water, various primary and secondary nutrients has drawn significant attraction from researchers, scientists, and industry persons due to their smartness with reference to controlled release characteristics based on plant requirement. Since the use of these hydrogels for controlled release application ensures the minimum utilization of water and plant nutrients in fields. Besides, this will bring down the overloading of fertilizer, soil contamination, and water pollution such as eutrophication, nitrate pollution, and micronutrient imbalance. This chapter is focused on the class of hydrogels that are used for the controlled release application in the agricultural and horticultural sectors as matrices, the possible methods of fine-tuning their structures for improving their fertilizer uptake and release behavior, safety aspects, and environmental issues.

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Investigation of Water Uptake Behavior of Superabsorbent Polymers Composed of N‐Vinyl‐2‐pyrrolidone and Partially Neutralized Acrylic Acid

Cited by 10 publications

References 17 publications

Effects of Hydrogel Amendment to Different Soils on Plant Available Water and Survival of Trees under Drought Conditions

Effects of Hydrogel Amendment to Different Soils on Plant Available Water and Survival of Trees under Drought Conditions

Application of Superabsorbent Polymers for Improving the Ecological Chemistry of Degraded or Polluted Lands

Smart Polymer Hydrogels as Matrices for the Controlled Release Applications in Agriculture Sector

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