Aqueous starch acetate dispersion as a novel coating material for controlled release products

2004 ◽  
Vol 96 (1) ◽  
pp. 179-191 ◽  
Author(s):  
Maarit Tarvainen ◽  
Soili Peltonen ◽  
Hannu Mikkonen ◽  
Minna Elovaara ◽  
Minna Tuunainen ◽  
...  
Keyword(s):  
Controlled Release ◽  
Coating Material ◽  
Starch Acetate

Inverse Modelling for Prediction of Coating Material Diffusivity and Lag Time of Controlled-Release Coated Urea Granule

2016 ◽  
Vol 369 ◽  
pp. 30-35
Author(s):  
Thanh H. Trinh ◽  
Ku Zilati Ku Shaari
Keyword(s):  
Controlled Release ◽  
Nutrient Uptake ◽  
Diffusion Model ◽  
Nutrient Utilization ◽  
Lag Time ◽  
Coating Material ◽  
Nutrient Loss ◽  
Inverse Simulation ◽  
Material Parameters ◽  
Coated Urea

Controlled release fertilizer (CRF) has attracted a lot of interest because of its advantages for ecosystem in terms of enhancement of nutrient utilization and reducing nutrient loss from leaching and volatilization, etc. While a number of research studies on novel coating material to control the release of nutrients, modelling has a significant role in predicting release behaviour and determining good CRF design that matches the nutrient requirement from the plants. The present study proposes a solution to predict coating material parameters based on multi-diffusion model and preliminary experimental results using inverse simulation technique. In addition, the solution showed an advantage in prediction the release of nutrient, i.e., the reduction in experimental time which plays an important role in investigation novel coating material and designing of CRFs which are matched the nutrient uptake from plants. Hence, this solution reduces experimental cost and time to researchers, who investigated novel CRFs.

Effect of Nanofillers on the Spreading Behavior of Biopolymer Materials on Urea Surface

2014 ◽  
Vol 625 ◽  
pp. 907-910
Author(s):  
Yon Norasyikin Samsudin ◽  
Nurul Izzaty Faizzen Zulkefely ◽  
Sohibatul Muizzah Mohamad Izhar ◽  
Ku Zilati Ku Shaari
Keyword(s):  
Contact Angle ◽  
Controlled Release ◽  
Ccd Camera ◽  
Coating Material ◽  
Impact Behavior ◽  
Optical Contact ◽  
New Approach ◽  
Controlled Release Fertilizer ◽  
Spreading Behavior ◽  
Maximum Spreading

This paper presented new approach where a new modified biopolymer reinforced with bentonite nanoclay is developed and used as the coating material for controlled-release fertilizer. Good wettability properties between coating material and urea surface is necessary to provide uniformity during the coating process of controlled release fertilizer. Seven different blending ratio of modified biopolymer solutions are prepared and evaluated for their wettability properties. The wettability properties measured include the surface tension, contact angle and maximum spreading diameter. Optical Contact Angle device comes with a Charged-Coupled Device (CCD) camera was used to capture every single image of the droplet impact behavior. From the analysis, it is proven that with addition of 2% nanoclay filler reinforced into modified biopolymer with blending ratio of 50/15/2.5/7.5 has the best wettability properties and provides better spreading behavior.

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