Preparation of Urea Slow Release Membrane Environment Friendly

Abstract:

First, the corn starch was taken as raw material, and then it was broken down by enzymes and fermentation by lactic acid bacteria, and the poly lactic acid was obtained by chemical synthesis. Then the corn starch was taken as raw material again, the dialdehyde starch was obtained by high efficient light-catalytic reactor. Secondly, a certain percentage of dialdehyde starch and urea were mixed together to get urea-formaldehyde resin. Finally, a certain amount of polylactic acid, urea formaldehyde resins and dispersions were put together and mixed in a high-speed stirring to get urea slow release membrane materials. Experimental results showed that it needed 150-300 days degradate completely by 75% poly lactic acid sustained release membrane, while 85% needed 100 -120 days. Single thin membrane absorption test showed that per unit area of the sustained release membrane absorption ability would increase with the poly lactic acid increased, and the absorbent capacity of 85% poly lactic acid of sustained release membrane was 112 times higher than the mass of itself.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 1618-1621
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.1618
• Online since: February 2012
• Authors: Shu Jiang Wang, Xing Quan Wang, Ming Hui Chen
• Keywords: Corn Starch (CS), Dialdehyde Starch, Polyl Actic Acid, Urea Sustained-Release Membrane, Urea-Formaldehyde Resin

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