Preparation of Polymer Microparticles Through Non-aqueous Suspension Polycondensations: Part Ⅵ-Analyses of Chemical and Enzymatic Degradation of Poly(Butylene Succinate) (PBS)

Dutra Luciana; Pinto Martina C. C.; Lima Rafael C.Franco MarianaViana MarianaCipolatti Eliane PereiraManoel Evelin AndradeFreire Denise Maria GuimaraesPinto Jose Carlos

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Preparation of Polymer Microparticles Through Non-aqueous Suspension Polycondensations: Part Ⅵ-Analyses of Chemical and Enzymatic Degradation of Poly(Butylene Succinate) (PBS)

机译：Preparation of Polymer Microparticles Through Non-aqueous Suspension Polycondensations: Part Ⅵ-Analyses of Chemical and Enzymatic Degradation of Poly(Butylene Succinate) (PBS)

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Two strategies were investigated to perform the controlled degradation of two grades of poly(butylene succinate) (PBS): the chemical and enzymatic degradation routes. PBS chemical degradation assays were carried out in alkaline and acidic media at the temperature range between 40 and 80 degrees C. Additionally, the effects of distinct enzymes (cutinase, lipase, cellulase, protease, and amylase) that exhibit distinct hydrolysis activities were investigated on the enzymatic degradation of PBS. Two grades of PBS were compared: PBS microparticles manufactured through suspension polycondensation (PBS1) and; commercial PBS (PBS2) manufactured in bulk processes. Polymer degradation was evaluated through high-performance liquid chromatography, gel permeation chromatography, weight loss analyses, and determination of the pH of the supernatant. It was observed that PBS1 was subject to high rates of chemical degradation at higher temperatures, especially when degradation was conducted in alkaline media. On the other hand, the analyzed operation conditions did not affect the degradability of PBS2 significantly, which fluctuated around 5% of weight loss after 4 weeks. The degradability of both polymer matrices was much more intense when enzymes were used. For PBS1, the enzyme degradation effect was significant (weight loss of 57%, 32%, 25% after 4 weeks of experimentation, using cutinase, lipase, and amylase, respectively); for PBS2, after 1 month of experimentation, the weight loss using cutinase and lipase approached respectively 100% and 81%. It can be concluded that the application of enzymes can be beneficial for the controlled degradation of PBS at mild process conditions, allowing the development of environmental-friendly strategies for the controlled degradation of this material, and that both chemical and enzymatic degradations are sensitive to the characteristics of the analyzed samples, which must be carefully considered during the process development stage.

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《Journal of polymers and the environment》 |2022年第5期|1893-1907|共15页
作者
Dutra Luciana; Pinto Martina C. C.; Lima Rafael C.Franco MarianaViana MarianaCipolatti Eliane PereiraManoel Evelin AndradeFreire Denise Maria GuimaraesPinto Jose Carlos;
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Univ Fed Rio de Janeiro, COPPE, Programa Engn Quim, CP 68502, BR-21941972 Rio De Janeiro, RJ, Brazil;

Univ Fed Rio de Janeiro, COPPE, Programa Engn Quim, CP 68502, BR-21941972 Rio De Janeiro, RJ, Brazil|Univ Fed Rio de Janeiro, Inst Quim, Dept Bioquim, Rio De Janeiro, Brazil;

Univ Fed Rio de Janeiro, Escola Quim, Programa Posgrad Engn Proc Quim & Bioquim, CP 68525, BR-21941598 Rio De Janeiro, RJ, BrazilUniv Fed Rio de Janeiro, Fac Farm, Dept Biotecnol Farmaceut, Rio De Janeiro, Brazil|Univ Estado Rio de Janeiro, Dept Tecnol Proc Bioquim, Sao Francisco Xavier 524, Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Quim, Dept Bioquim, Rio De Janeiro, Brazil|Univ Fed Rio de Janeiro, Fac Farm, Dept Biotecnol Farmaceut, Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, Inst Quim, Dept Bioquim, Rio De Janeiro, BrazilUniv Fed Rio de Janeiro, COPPE, Programa Engn Quim, CP 68502, BR-21941972 Rio De Janeiro, RJ, Brazil|Univ Fed Rio de Janeiro, Escola Quim, Programa Posgrad Engn Proc Quim & Bioquim, CP 68525, BR-21941598 Rio De Janeiro, RJ, Brazil;

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Poly(butylene succinate); PBS; Chemical degradation; Enzymatic degradation; Enzymes; Eco-friendly process;

Preparation of Polymer Microparticles Through Non-aqueous Suspension Polycondensations: Part Ⅵ-Analyses of Chemical and Enzymatic Degradation of Poly(Butylene Succinate) (PBS)

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