Nghiên cứu chế tạo màng trên cơ sở tinh bột/PVA cho phân NPK nhả chậm

Nguyễn Cửu Khoa, Dương Thị Bé Thi, Trần Ngọc Quyển, Lê Thị Phương

Abstract


Membranes coating for controlled release fertilizer (CRF) were prepared from poly(vinylalcohol)/starch using formaldehyde as a crosslinker. The influence of the blending ratio of starch/PVA and the content of formaldehyde on the swell of the film has been investigated. The membrane structure was observed by FT-IR and NMR. The results showed that the obtained membrane was high durability and economic effect at the weight ratio of starch: PVA:aldehyde = 9:1:0.6. After 15 days, the release behavior of nitrogen, phosphate and potassium was 41.67 %, 46.04 %, 43.63 %, respectively. The encapsulated system exhibiting a good controlled-release fertilizer and water-retention capacity, biodegradation and environment friendly, could be especially useful in agricultural and horticultural applications.


Keywords


NPK controlled release fertilizer, starch/PVA

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