Preparation and properties of a slow release NP compound fertilizer with superabsorbent and moisture preservation

Guo, Mingyu; Liu, Mingzhu; Hu, Zheng; Zhan, Falu; Wu, Lan

doi:10.1002/app.21140

Cited by 63 publications

(47 citation statements)

References 12 publications

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“…Applications in food [1,2] environmental management [3][4][5], agriculture [6], pharmacy [7], biomedical engineering [8] and textile [9] have been reported widely in the literature.…”

Section: Introductionmentioning

confidence: 99%

The synthesis conditions, characterizations and thermal degradation studies of an etherified starch from an unconventional source

Lawal

Lechner

Kulicke

2008

Polymer Degradation and Stability

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Starch isolated from an under-utilized legume plant (pigeon pea) was carboxymethylated.Influences of reaction parameters were investigated on the degree of substitution (DS) and the reaction efficiency (RE). Studies showed that optimal DS of 1.12 could be reached at reaction efficiency of 80.6 % in isopropanol-water reaction medium (40 o C, 3h). The scanning electron microscopy showed that after carboxymethylation, the granular appearance of the native starch was distorted. Wide-angle X-ray diffractometry revealed that crystallinity was reduced significantly after carboxymethylation. The infrared spectra revealed new bands in the carboxymethyl starch at ν =1600, 1426 and 1324 cm -1 and they were attributed to carbonyl functional groups vibration, -CH 2 scissoring and OH bending vibration respectively. Broad band 13 C NMR of carboxymethyl starch showed intense peak at δ = 180.3 ppm and it was assigned for carbonyl carbon on the carboxymethyl substituent on the AGU (Anhydroglucose Unit). DEPT (Distortionless Enhancement by Polarization Transfer) 135 NMR showed negative signals which correspond to methylene carbons on the AGU. The differential scanning calorimetry (DSC)suggests loss of crystallinity after carboxymethylation. Thermogravimetry (TG), Derivative Thermogravimetry (DTG) and Differential Thermal Analysis (DTA) show that thermal stability improved after carboxymethylation. The study provides information on the preparation and characterization of a biomaterial from a new source which could be used alone or in the preparation of other functional polymers for diverse polymer applications.2

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“…Applications in food [1,2] environmental management [3][4][5], agriculture [6], pharmacy [7], biomedical engineering [8] and textile [9] have been reported widely in the literature.…”

Section: Introductionmentioning

confidence: 99%

The synthesis conditions, characterizations and thermal degradation studies of an etherified starch from an unconventional source

Lawal

Lechner

Kulicke

2008

Polymer Degradation and Stability

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“…About 40% -70% of the nitrogen and 80% -90% of the phosphorus of the applied fertilizers either are lost into the environment or become unavailable for crops. It not only causes major economic and resource loss but also is responsible for serious environmental pollution [6].…”

mentioning

confidence: 99%

Preparation, Characterization and Evaluation of Efficacy of Phosphorus and Potassium Incorporated Nano Fertilizer

Rajonee¹,

Zaman²,

Huq³

2017

ANP

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Phosphorus and Potassium incorporated nano fertilizer were prepared using zeolite as a carrier material at a laboratory scale. X-ray diffraction (XRD) analysis was done for the characterization and confirmation of the incorporation. Chemical analyses also indicate the sorption of fertilizer material into zeolite. An in vitro incubation study was conducted for 30 days at field moisture condition to see the release of the fertilizer materials and was compared with a conventional fertilizer. The release pattern of nutrients from either source showed a substantial decreasing trend with time although the release of P and K was higher for nano fertilizer than the conventional one. A pot culture experiment with Ipomoea aquatica (Kalmi) was also conducted to see the efficacy of the nano fertilizer in the growth promotion of the plant. Analysis showed higher accumulation of P and K in plants grown with nano fertilizer. Post-effect of nano fertilizer application in soil showed better pH, moisture, CEC, available P and K under nano fertilizer treatment than the conventional fertilizer.

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“…Bei Kontakt mit wässerigen Flüssigkeiten quellen die SAP unter Bildung eines Hydrogels teilweise bis auf das 1000-fache ihres Trockengewichts auf, wobei die aufgenommene Flüs-sigkeit auch unter Druckbelastung gespeichert wird. In der Agrartechnik dienen SAP zur Verbesserung des Feuchtigkeitsspeichervermö-gens von Böden [2]. In zahlreichen Cremes, Pudern und Lotionen spenden SAP Feuchtigkeit [3].…”

Section: Problemstellungunclassified

Polymere Hydrogele in der Abdichtungstechnik – Untersuchungen zum Quellungsdruck

Wack

Ulbricht

2007

Chemie Ingenieur Technik

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Polymere Hydrogele werden in der letzten Zeit vermehrt auch im Bereich der Abdichtungstechnik eingesetzt. Die Anwendung der Materialien erfolgt dabei zumeist empirisch und basiert auf dem Quellungsdruck, den die Polymere bei der Aufquellung in einem fest vorgegebenen Volumen entwickeln. Die hier entwickelte Methode der Bestimmung des Quellungsdrucks bei vorgegebenem Endvolumen der Quellung ist für detaillierte Untersuchungen, wie sie im Hinblick auf die Optimierung von Materialien für die Abdichtungstechnik notwendig sind, sehr gut anwendbar. Darüber hinaus ermöglicht sie auch mechanistische Aussagen zum Stofftransport während des Quellungsprozesses.

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Preparation and properties of a slow release NP compound fertilizer with superabsorbent and moisture preservation

Cited by 63 publications

References 12 publications

The synthesis conditions, characterizations and thermal degradation studies of an etherified starch from an unconventional source

The synthesis conditions, characterizations and thermal degradation studies of an etherified starch from an unconventional source

Preparation, Characterization and Evaluation of Efficacy of Phosphorus and Potassium Incorporated Nano Fertilizer

Polymere Hydrogele in der Abdichtungstechnik – Untersuchungen zum Quellungsdruck

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