第35卷，第11期 2015年11
光谱学与光谱分析 Spectroscopy and Spectral Analysis
Degradation Ability of Modified Polyvinyl AlcoholFilmforCoatingofFertilizer
Vol. 35 ,No. 11 -pp3262-3267
November, 2015
ZOU Hong-tao,LING Yao,YU Yang,ZHANG Yu-ling,
YU Na,ZHANG Yu-long
College of Land and Environment , Shenyang Agricultural University , Northeast Key Open Laboratory of Soil
and Environment , Ministry of Agriculture, State Engineering Laboratory of Efficient Use of Soil and Fertilizer Resources , Shenyang110866, China
Abstract U sing outdoor exposure and cinnamon soil incubation test, by quality changes , infrared spectrosco py and electron microscopic scanning technology , to research the degradation ability of self-developed coated fertilizer films . The results of outdoor exposure and cinnamon soil incubation test showed that all films had certain degradation ability , and the degradation rate increased with the increase of time. Under two kinds of test conditions , the highest degradation rate could reach above 35/ . The degradation ability of film citric acid/ PV A was much stronger than epoxy resin/PVA . The degradation ability of citric acid/PVA /diatomite compos-ite film materials was further enhanced because of the addition of diatomite . The epoxy resin/PVA composite film materials , although they had certain degradability , compared to the contrast , the difference was not sig-nificant , and adding diatomite can't obviously increase the degradation rate . The results of IR spectroscopy showed that some major functional groups, such as CO,CC,
CH would be reduced after degra-
dation , and the transmission rate also increased , which showed that the degradation of composite film materials must be happened . Scanning electron microscopy showed that the surface becomes rough and uneven , and it al-so meant the films have some degradation . The results of IR spectroscopy and scanning electron microscopy were consistent with the results of quality change test , and could more objectively represent the degradability of film material. Modified film materials can effectively control nutrient release without causing harm to the soil environment , so it is suitable for the film materials of coated fertilizer .
Keywords Coated fertilizers ; Modified polyvinyl alcohol ; Epoxy resin ; Citric acid ; Degradation ability
中图分类号：0657.3
Introduction
文献标识码：A
DOI: 10. 3964 /j. issn. 1000-0593(2015 )11-3262-06
duce the environmental pollution caused by fertilizers . How-ever , due to the difficult degradation of the organic polymer , the residual film materials in the soil will impact on the envi-
Coated fertilizer is the current focus of new research in the field of fertilizer, while the research and development of film materials is the key of coated fertilizers studies(i-3] . Nu-merous studies showed that coated fertilizer made by organic polymer can improve the utilization rate of fertilizer, and re-
Received ; 2014-11-01 ; accepted ; 2015-03-12
ronment . Research and development on environment-friendly film materials that have a release effect for fertilizer nutrients and also can degrade in the environment is significant[-6]. Currently , research on biodegradable film materials for coat-ing fertilizer mainly focuses on adding photosensitizer that
Foundation item: The National Natural Science Foundation of China (31000936 ), Higher Talents Support Plogram of Liaoning Province
(LJQ2012063)
Biography : ZOU Hong-tao, (1975—), Ph. D ., Professor of College of Land and Environment , Shenyang Agricultural University
e-mail : 13889181497@ 163 .com
Corresponding author
e-mail : ylzsau@163.com