Preparation and Environmental Protection Performance of Gelatin/PVA Coating Materials of Fertilizers

doi:10.11924/j.issn.1000-6850.casb2021-0095

Abstract

Abstract:

Environmentally friendly resin has been used as coating materials in manufacturing controlled/slow release fertilizers to prevent the potential damage of resin to soil. The coating materials with various mass ration of gelatin/PVA were obtained by solution blending. The chemical structures of the materials were investigated by FTIR and SEM, the tensile strength, breaking extension and nutrient release rate were measured. Moreover, the biodegradation behaviors of the materials under controlled composting conditions and the acute oral toxicity in mice were studied. The results showed that an optimal compatibility could be achieved when the mass ratio of PVA to gelatin was 4 to 1. The coating materials had good mechanical properties, biodegradability and sustained release properties. The materials were actually non-toxic to mice and had relatively good safety. In general, gelatin/PVA coating materials of fertilizers have good environmental protection performance and application prospect.

Key words: Coated fertilizer, Gelatin, PVA, coating materials, controlled/slow release fertilizers, environmental protection performance, biodegradation

CLC Number:

S143.1

Liu Ying, Wei Min, Yang Pinghua, Geng Dandan. Preparation and Environmental Protection Performance of Gelatin/PVA Coating Materials of Fertilizers[J]. Chinese Agricultural Science Bulletin, 2021, 37(14): 90-96.

Figures/Tables 9

References 28

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样品	外观	干固体含量/%	水份含量/%	干固体中总有机碳含量/%	理论二氧化碳放量/(CO₂ g/100 g)
复合膜材料	粉末	94.74	5.26	51.51	188.87
纤维素	粉末	99.89	0.11	44.42	162.87

样品	外观	干固体含量/%	水份含量/%	干固体中总有机碳含量/%	理论二氧化碳放量/(CO₂ g/100 g)
复合膜材料	粉末	94.74	5.26	51.51	188.87
纤维素	粉末	99.89	0.11	44.42	162.87

剂量/[mg/(kg·bw)	性别	数量/只	初质/g	终质量/g	死亡数/只	器脏病变数/只
5000	雌性	10	22.6±1.0	29.8±1.0	0	0
5000	雄性	10	23.8±1.3	37.6±2.7	0	0

剂量/[mg/(kg·bw)	性别	数量/只	初质/g	终质量/g	死亡数/只	器脏病变数/只
5000	雌性	10	22.6±1.0	29.8±1.0	0	0
5000	雄性	10	23.8±1.3	37.6±2.7	0	0