doi:

DOI: 10.3724/SP.J.1105.2014.13321

Acta Polymerica Sinica (高分子学报) 2014/014:2 PP.276-285

Molecular Mechanism Involved in Biodegradation of Castor Oil Based Plastic Foam


Abstract:
The castor oil was converted into maleic acid ester (i.e. maleated castor oil, MACO) by the reaction with maleic anhydride. Afterwards, the resultant MACO was free-radically copolymerized with reactive diluents (styrene, St) and cured to form foam plastics through conventional foaming technique. By changing MACO/St ratio, mechanical properties and aerobic biodegradability of MACO foams can be easily adjusted. To understand the biodegradation mechanism of the castor oil based plastic foam, various characterization techniques were employed in a systematic way. Compost tests in laboratory soil combined with molecular characterizations demonstrated that the bio-foam has acquired excellent biodegradability. Destruction of the network structure of the castor oil based polymer resulted from fission of ester groups due to attack of microorganisms. The final product of compost tests proved to be carbon dioxide. Inoculation of fungi on the castor oil based polymer further revealed that the vegetable oil acted as carbon source of growth of aspergillus niger. Under the catalysis of lipase, castor oil, MACO and its foam were hydrolyzed to produce fatty acids. The results of different degradation tests matched each other, which not only confirmed biodegradability of MACO plastics, but also preliminarily revealed molecular mechanism of the biodegradation process.

Key words:Castor oil, Foam plastics, Biodegradability, Molecular mechanism

ReleaseDate:2014-07-21 17:05:31



1 Crandall L.Inform,2002,13:626~630

2 Mohanty A K,Misraa M,Hinrichsen G.Macromol Mater Eng,2000,276/277:1~24

3 Khot S N,Lascala J J,Can E,Morye S S,Williams G I,Palmese G R,Kusefoglu S H,Wool R P.J Appl Polym Sci,2001,82:703~723

4 Silva R V,Spinelli D,Bose Filho W W,Claro Neto S,Chierice G O,Tarpani J R.Compos Sci Technol,2006,66 :1328~1335

5 Donnell A,Dweib M,Wool R.Compo Sci Technol,2004,64:1135~1145

6 Donnell A O,Dweib M A,Wool R P.Compo Sci Technol,2004,64:1135~1145

7 Dweib M A,Hu B,Shenton H W,Wool R P.Compos Struct,2006,74:379~388

8 Liu Z S,Erhan S Z,Xu J,Calvert P D.J Appl Polym Sci,2002,85:2100~2107

9 Lu J,Wool R P.Compo Sci Technol,2008,68:1025~1033

10 Pan Meijuan(潘梅娟),Wang Xiaohui(王晓辉),Yao Cheng(姚成).Modern Chemical Industry(现代化工),2007,27:521~524

11 Don D A,McSherry W F,Goldblatt L A.J Am Oil Chem Soc,1959,36:16~20

12 Kong X H,Narine S S.Biomacromolecules,2007,8:2203~2209

13 Guo A,Javni I,Petrovic Z.J Appl Polym Sci,2000,77:467~473

14 Wu Suping(吴素平),Rong Minzhi(容敏智),Zhang Mingqiu(章明秋).Acta Polymerica Sinica(高分子学报),2007,(10):993~998

15 Qiu J F,Zhang M Q,Rong M Z,Wu S P,Karger-Kocsis J.J Mater Chem A,2013,1,2533~2542

16 Wang H J,Rong M Z,Zhang M Q,Hu J,Tibor C.Biomacromolecules,2008,9:615~623

17 Wang H J,Rong M Z,Zhang M Q,Tibor C.Compos Interface,2008,15:95~110

18 Shogren R L,Petrovic Z.J Polym Enviro,2004,3:173~178

19 Fang Jun(方俊),Huang Farong(黄发荣),Guo Hongmei(郭红梅),Lin Mingtao(林明涛),Dong Xu(董旭),Wang Jun(王俊).Journal of Functional Polymers(功能高分子学报),2003,16:191~196

20 Zhang Jianfei(张健飞),Wang Xiaochun(王晓春),Gong Jixian(巩继贤),Ji Li(季莉),Gu Zhenya(顾振亚).Journal of Donghua University(东华大学学报),2003,29:105~109

21 Lu Guining(卢桂宁),Dang Zhi(党志),Tao Xueqin(陶雪琴),Zhang Taiping(张太平),Zhou Yongzhang(周永章).Chinese Journal of Soil Science(土壤通报),2006,37:189~192

22 Chen Jie(陈洁),Song Qizhe(宋启泽).Organic Spectral Analysis(有机波谱分析).Beijing(北京):Beijing Institute of Technology Press(北京理工大学出版社),1997.69~73

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