Viscoelastic properties of borax loaded CMC-g-cl-poly(AAm) hydrogel composites and their boron nutrient release behavior

The objective of this research is to study the nutrient release behaviors on slow release fertilizer (Osmocote® N13:P13:K13, 3 month release formulation). The fertilizer was added into distilled water which adjusted pH of 6.5 and 7.5. The nutrient release behaviors were determined by collecting samples every 1 week and analyzed the nutrient contents in samples by scientific methods. As the result, for the total N release behavior, it may be considered that at lower pH condition tended to release more than that at higher one, for the P (shown by P2O5) and K (shown by K2O) release behaviors may be high at high pH condition.

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Synthesis and characterization of starch-g -Poly(acrylic acid)/Organo-Zeolite 4A superabsorbent composites with respect to their water-holding capacities and nutrient-release behavior

Polymer Composites ◽

10.1002/pc.23754 ◽

2015 ◽

Vol 38 (9) ◽

pp. 1838-1848 ◽

Cited By ~ 15

Author(s):

Yan Zhang ◽

Lin Zhao ◽

Yizhong Chen

Keyword(s):

Acrylic Acid ◽

Nutrient Release ◽

Synthesis And Characterization ◽

Release Behavior ◽

Zeolite 4A ◽

Water Holding ◽

Superabsorbent Composites ◽

Poly Acrylic Acid

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Novel thermosensitive hydrogel composites based on poly(d,l-lactide-co-glycolide) nanoparticles embedded in poly(n-isopropyl acrylamide) with sustained drug-release behavior

Journal of Applied Polymer Science ◽

10.1002/app.40625 ◽

2014 ◽

Vol 131 (16) ◽

pp. n/a-n/a ◽

Cited By ~ 2

Author(s):

Bahareh Baghaei ◽

Seyed Hassan Jafari ◽

Hossein Ali Khonakdar ◽

Udo Wagenknecht ◽

Gert Heinrich

Keyword(s):

Drug Release ◽

Release Behavior ◽

Sustained Drug Release ◽

Thermosensitive Hydrogel ◽

Drug Release Behavior ◽

Isopropyl Acrylamide ◽

Hydrogel Composites

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Preparation and Properties of the Slow-Release Fertilizer with Green Coat

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.4745 ◽

2012 ◽

Vol 518-523 ◽

pp. 4745-4748

Author(s):

Qing Wang ◽

Sha Chen ◽

Pei Guang Zhao ◽

Yu Cao ◽

Long Fei Zhu ◽

...

Keyword(s):

Water Retention ◽

Slow Release ◽

Nutrient Release ◽

Release Behavior ◽

Digestion Method ◽

Slow Release Fertilizer ◽

Environmental Friendly ◽

Influence Of Water ◽

Slow Release Fertilizers ◽

Kjeldahl Digestion

A kind of double-coated environmental friendly fertilizer was prepared by urea as a core, well-mixed keratin and oxidation starch as an inner coating, and superabsorbent polymer as the outer coating. The influence of water absorbency, water retention, and the slow-release behavior of the study fertilizer were investigated. 0.01M CaCl2 immersion extraction and Kjeldahl digestion method were used to measure the content of nitrogen. And the result showed that the nutrient release was 72wt% on the thirtieth day. This result corresponded with the standard of slow release fertilizers of the Committee of European Normalization (CEN) [1]. Keratin and oxidation starch were biodegradable polymer and nontoxic. Both the properties of the materials and the result of the slow-release behavior suggested a new kind of excellent, environmental friendly, slow-release fertilizer.

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Zeolite reinforced carboxymethyl cellulose-Na+ -g-cl -poly(AAm) hydrogel composites with pH responsive phosphate release behavior

Journal of Applied Polymer Science ◽

10.1002/app.47332 ◽

2018 ◽

Vol 136 (15) ◽

pp. 47332 ◽

Cited By ~ 6

Author(s):

Anupama Singh ◽

Dhruba Jyoti Sarkar ◽

Shailja Mittal ◽

Rashmi Dhaka ◽

Pushkar Maiti ◽

...

Keyword(s):

Carboxymethyl Cellulose ◽

Release Behavior ◽

Ph Responsive ◽

Phosphate Release ◽

Hydrogel Composites

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Study the Release of Urea from Agrium® Coated Urea Using UV-Vis Spectrometer

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.625.745 ◽

2014 ◽

Vol 625 ◽

pp. 745-748 ◽

Cited By ~ 2

Author(s):

Thanh H. Trinh ◽

Quyen Nhat Dao ◽

Ku Zilati Ku Shaari ◽

Lukman Ismail ◽

Anis Shuib

Keyword(s):

Controlled Release ◽

Nutrient Release ◽

Fertilizer Application ◽

Release Behavior ◽

Fertilizer Effectiveness ◽

Release Pattern ◽

Crop Field ◽

Coated Urea ◽

Good Potential ◽

Sample Dilution

Elucidating the release pattern of controlled release fertilizer (CRF) is important not just for manufactures but also for farmers because it assists them in making judgments of fertilizer effectiveness and nutrient planning. Investigation on the release pattern of different types of CRF both in the laboratory and in the crop-field is crucial in order to determine the effectiveness of fertilizer on plant growth. Consequently, the fertilizer application could be planned to meet the crop requirement. This paper presents a practical approach to analyze the release pattern using Agrium®coated urea. UV-Vis spectrometer is employed to analyze the amount of nitrogen released. The approach reduced analytical error by preventing sample dilution before measuring. According to laboratory results, UV-Vis spectrometer has shown a good potential to be used in studying the nutrient release behavior from CRF. A sigmoidal shape has been obtained from the release profile, and is corresponded with findings in other studies. The results satisfy the criteria for CRF specified by European Committee for Standardization. Collectively, this study demonstrated that the UV-Vis spectrometer is a promising equipment, which can be utilized in studying controlled release behavior.

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