Preparation and characterization of pH‐ and temperature‐responsive semi–interpenetrating polymer network hydrogels based on linear sodium alginate and crosslinked poly(<i>N</i>‐isopropylacrylamide)

Zhang, Gao Qi; Zha, Liu; Zhou, Mingyang; Hong, Jing; Liang, Bo

doi:10.1002/app.21957

Cited by 68 publications

(23 citation statements)

References 26 publications

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“…In addition, the presence of hydrogels in the soil improves water availability, reducing nutrient losses by percolation and leaching. Improvement of soil aeration and drainage and acceleration of the rate of plant root and shoot development were also observed (Yoshimura et al 2006;Zhang et al 2005).…”

Section: Application Of Hydrogelsmentioning

confidence: 88%

Nitrogen fertility and abiotic stresses management in cotton crop: a review

Khan

Tan

Afridi

et al. 2017

Environ Sci Pollut Res

133

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This review outlines nitrogen (N) responses in crop production and potential management decisions to ameliorate abiotic stresses for better crop production. N is a primary constituent of the nucleotides and proteins that are essential for life. Production and application of N fertilizers consume huge amounts of energy, and excess is detrimental to the environment. Therefore, increasing plant N use efficiency (NUE) is important for the development of sustainable agriculture. NUE has a key role in crop yield and can be enhanced by controlling loss of fertilizers by application of humic acid and natural polymers (hydrogels), having high water-holding capacity which can improve plant performance under field conditions. Abiotic stresses such as waterlogging, drought, heat, and salinity are the major limitations for successful crop production. Therefore, integrated management approaches such as addition of aminoethoxyvinylglycine (AVG), the film antitranspirant (di-1-p-menthene and pinolene) nutrients, hydrogels, and phytohormones may provide novel approaches to improve plant tolerance against abiotic stress-induced damage. Moreover, for plant breeders and molecular biologists, it is a challenge to develop cotton cultivars that can tolerate plant abiotic stresses while having high potential NUE for the future.

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Section: Application Of Hydrogelsmentioning

confidence: 88%

Nitrogen fertility and abiotic stresses management in cotton crop: a review

Khan

Tan

Afridi

et al. 2017

Environ Sci Pollut Res

133

View full text Add to dashboard Cite

show abstract

“…Additionally, the presence of hydrogels in the soil improves water availability, reducing losses by percolation and leaching of nutrients. Improvement of soil aeration and drainage, accelerates the development rate of the roots and shoots in plants, has also been observed (Yoshimura et al 2006;Zhang et al 2005).…”

Section: Introductionmentioning

confidence: 91%

Synthesis and characterization of gellan gum: chitosan biohydrogels for soil humidity control and fertilizer release

2015

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Gellan gum-chitosan superabsorbent hydrogels were obtained by crosslinking reaction throughout the ionic bond formation. The network formation between high acetyl gellan gum (HAGG) and chitosan (CH) with different proportions was confirmed by FTIR spectra. The thermal stability up to 250°C was obtained from thermogravimetry and high water swelling from differential scanning calorimetry. It was observed that as the quantity of crosslinks increases, the water sorption and average molecular weight between the crosslinks decrease with a decrease of the HAGG content in the networks. The best results of water absorption of more than 218 times the dry weight of the sample were obtained for the sample HAGG-CH with 4:1 composition. This sample also evidenced the lowest amount of crosslinks when compared with the sample with 1:4 proportion, being 1.1 9 10 -4 and 11.1 9 10 -4 , respectively. The water evaporation analysis showed that the samples retain water for about 500 min, i.e., more than twice as long when compared to 200 min for pure water. Moreover, the HAGG-CH samples were tested as commercial monopotassium phosphate fertilizer-release agents showing that almost complete release occurred in approximately 8 h, and its quantity is mainly influenced by the concentration of fertilizer used rather than the hydrogel composition. Finally, the samples were lyophilized and their morphology analyzed by scanning electron microscopy.

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“…The results are attributed to our mentioned results in the swelling study that a highly expanded network can be formed by electrostatic repulsions among the butyl methacrylate carboxylate anions (-COO -) during the polymerization process [26]. …”

Section: Scanning Electron Microscope (Sem)mentioning

confidence: 81%

Radiation synthesis and characterization of Poly(butyl methacrylate/acrylamide) copolymeric hydrogels and heparin controlled drug release

et al. 2015

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Radiation-induced copolymerization of butyl methacrylate/acrylamide has been investigated. It was observed that as the irradiation dose increases, the gelation percent increases and the maximum gelation % was achieved at irradiation dose of 30 kGy. The equilibrium swelling studies of the prepared hydrogels at various conditions were carried out in an aqueous solution. The pH sensitivity in the range of 4-7.5 was investigated. It is found that the swelling behavior of Poly (BMA/AAm) is higher than that of Poly(BMA) and Poly(AAm). Swelling kinetics and diffusion mechanism indicate that the water penetration obeys non-Fickian transport mechanism. The characterization and some selected properties of the prepared hydrogels were evaluated using FTIR, XRD, TGA and SEM. The drug release characteristics of the prepared hydrogel were studied using heparin as example of anticoagulant drug. The drug release found to be governed by multiple factors contributed by each composition of the prepared hydrogel including their drug binding affinities and water uptake rates.

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Preparation and characterization of pH‐ and temperature‐responsive semi–interpenetrating polymer network hydrogels based on linear sodium alginate and crosslinked poly(N‐isopropylacrylamide)

Cited by 68 publications

References 26 publications

Nitrogen fertility and abiotic stresses management in cotton crop: a review

Nitrogen fertility and abiotic stresses management in cotton crop: a review

Synthesis and characterization of gellan gum: chitosan biohydrogels for soil humidity control and fertilizer release

Radiation synthesis and characterization of Poly(butyl methacrylate/acrylamide) copolymeric hydrogels and heparin controlled drug release

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