Natural Degradation and Biodegradation of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) in Liquid and Solid Marine Environments
|Author(s)||Deroine Morgan1, 2, 3, Cesar Guy2, Le Duigou Antoine1, Davies Peter3, Bruzaud Stephane1|
|Affiliation(s)||1 : Univ Bretagne Sud, EA 4250, LIMATB, F-56100 Lorient, France.
2 : Univ Bretagne Sud, SERPBIO, F-56321 Lorient, France.
3 : IFREMER, Marine Struct Grp, Ctr Bretagne, F-29280 Plouzane, France.
|Source||Journal Of Polymers And The Environment (1566-2543) (Springer/plenum Publishers), 2015-12 , Vol. 23 , N. 4 , P. 493-505|
|WOS© Times Cited||22|
|Keyword(s)||PHBV, Natural ageing, Degradation, Biodegradation, Seawater|
|Abstract||In this study, natural degradation and biodegradation of poly(3-hydroxybuyrate-co-3-hydroxyvalerate) (PHBV) films were followed in different marine environments. First of all, ageing of PHBV films was investigated in natural seawater for 180 days and degradation was followed by means of weight loss measurements, scanning electron microscopy (SEM), differential scanning calorimetry and steric exclusion chromatography. In a second part, biodegradation tests were performed on PHBV powder, by following carbon dioxide (CO2) release(,) to highlight the PHBV bioassimilation of marine microorganisms. Three different marine environments were considered for biodegradation tests: a solid inoculum with foreshore sand, a solid-liquid inoculum with sand and seawater and a liquid inoculum with seawater. In the latter, a biofilm was added to study the influence of microorganisms on biodegradation kinetics. The films aged under natural conditions show a large loss of weight after 180 days in immersion, around 36 %, confirmed by SEM pictures which show an increase of the surface erosion and a decrease of the sample thickness. Microorganisms' attack occurred as suggested by CO2 release during biodegradation tests, whatever the environment studied.|