Encapsulation of chlorpyrifos in microcapsules prepared using industrial ureaformaldehyde adhesive

WANG Lei;ZHAO Jing

Journal of Beijing University of Chemical Technology ›› 2009, Vol. 36 ›› Issue (5) : 46-51.

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Journal of Beijing University of Chemical Technology ›› 2009, Vol. 36 ›› Issue (5) : 46-51.
材料科学与工程

Encapsulation of chlorpyrifos in microcapsules prepared using industrial ureaformaldehyde adhesive

  • WANG Lei;ZHAO Jing
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Abstract

Poly(ureaformaldehyde) (PUF) microcapsules loaded with chlorpyrifos were prepa red by in situ polymerization using an industrial ureaformaldehyde adhesive. T he main factors affecting the properties of the microcapsules were investigated, and the conditions for preparing the microcapsules were optimized. The results showed that the variety of the curing agent, the shell/core ratio and the reacti on temperature all significantly affect the drug loading, the encapsulation effi ciency and the release rate of the microcapsules, and that the reaction time and the speed of addition of the acid also have a slight effect on the properties o f the microcapsules. The optimized reaction conditions were found to be: oxalic acid as curing agent; shell/core ratio of 0.94; reaction temperature of 40 °C. The microcapsules prepared under these conditions had a 67.7% drug loading, 87.7% encapsulation efficiency and 88.2% yield. Microcapsules prepared in this w ay had comparable properties to those prepared under equivalent conditions by in situ polymerization of urea and formaldehyde.

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WANG Lei;ZHAO Jing. Encapsulation of chlorpyrifos in microcapsules prepared using industrial ureaformaldehyde adhesive [J]. Journal of Beijing University of Chemical Technology, 2009, 36(5): 46-51

References

[1]李界秋, 黎晓峰, 沈方科, 等. 毒死蜱在土壤中的环境行为研究[J ]. 农业资源与环境科学, 2007, 23(1): 168-171.
Li J Q, Li X F, Shen F K, et al. Study on environmental behavior of chlorpyrifos in soil[J]. Chinese Agricultural Science Bulletin, 2007, 23(1): 168-171. (in Chinese)[2]林郁. 农药应用大全[M]. 北京: 农业出版社, 1989: 186-187.

Lin Y. Beijing: Agriculture Press, 1989:186-187.(in Chinese)
[3]宋健, 陈磊, 李效军. 微胶囊化技术及应用[M]. 北京: 化学工业出版社, 20 01.

Song J, Chen L, Li X J. Beijing: Chemical Industry Press,2001. (in Chinese)
[4]Naoki M, Igarashi Y, Aoyagi S. Insecticide comprising a suspension of microcapsules containing chlorpyrifos: Europe, AU4433489[P]. 19891102. 
[5]Marcus A. Microencapsulated composition containing chlorpyrifos or en dosulfsan: US, 5549903[P]. 19940728.
[6]丁向东. 用界面聚合法制备毒死蜱微胶囊悬浮剂[J]. 农药, 2007, 46(10): 666-668, 674.
Ding X D. Preparation of chlorpyrifos capsule suspension[J]. Agrochemicals, 20 07, 46(10): 666-668,674. (in Chinese)
[7]Zhang Q, Zhang P P, Jiao Q Z. Synthesis and characterization of micro capsules with chlorpyrifos cores and polyurea walls[J]. Chem Res Chinese U, 20 06, 22(3): 379-382.
[8]赵德, 刘峰, 慕卫,等. 毒死蜱微囊悬浮剂的制备及微囊化条件的优化[J]. 农药学学报. 2006, 8(1): 77-82.
Zhao D, Liu F, Mu W, et al. Preparation of chlorpyrifos aqueous capsule suspensi on and optimization of encapsulation conditions[J]. Chinese Journal of Pestici de Science, 2006, 8(1): 77-82. (in Chinese)
[9]赵德, 刘峰, 慕卫,等. 毒死蜱微胶囊制备中表面形貌和包封率的影响因素[J ]. 应用化学,2007, 24(5): 589-592.
Zhao D, Liu F, Mu W, et al. Factors affecting morphology and encapsulation ratio of chlorpyrifos microcapsules with UFresin during preparation[J]. Chinese J ournal of Applied Chemistry, 2007, 24(5): 589-592. (in Chinese)
[10]曾军, 王晓青, 季君晖,等. 降解塑料PBS/农药缓释微胶囊的制备与表征[J]. 中国塑料,2006, 20(8): 69-74.

Zeng J, Wang X Q, Ji J H, et al. Preparation and characterization of poly(butyle ne succinate) microcapsules containing chlorpyrifos[J]. China Plastics, 2006, 20(8): 69-74. (in Chinese)
[11]Suryanarayana C, Chowdoji Rao K, Kumar D. Preparation and characteri zation of microcapsules containing linseed oil and its use in selfhealing coat ings[J]. Progress in Organic Coatings, 2008, 63: 72-78.
[12]Yuan L, Gu A J, Liang G Z. Preparation and properties of poly(urea formaldehyde) microcapsules filled with epoxy resins[J]. Materials Chemistry a nd Physics, 2008, 110: 417-425.
[13]Yuan L, Liang G Z, Xie J Q, et al. Thermal stability of microencap sulated epoxy resins with poly(ureaformaldehyde)[J]. Polymer Degradation and Stability, 2006, 91: 2300-2306.
[14]Li H Y, Wang R G, Hu H L, et al. Surface modification of selfheali ng poly(ureaformaldehyde) microcapsules using silanecoupling agent[J]. App lied Surface Science, 2008, 255(5): 1692-1698.
[15]Qiao R, Zhang X L, Qiu R, et al. Synthesis of functional microcapsul es by in situ polymerization for electrophoretic image display elements[J]. Co lloids and Surfaces A: Physicochem Eng Aspects, 2008, 313/314: 347-350.
[16]赵临五,王春鹏. 脲醛树脂胶黏剂:制备、配方、分析与应用[M]. 北京: 化学工业出版社, 2005.

Zhao L W, Wang C P. Beijing: Chemical Industry Press, 2005.(in Chinese)

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