Characterization of medium chain length polyhydroxyalkanoate produced from olive oil deodorizer distillate

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• 作者：Madalena V. Cruz^a ; Diana Araú ; jo^a ; Ví ; tor D. Alves^b ; Filomena Freitas^a ; ^{a4406@fct.unl.pt" class="auth_mail" title="E-mail the corresponding author} ; Maria A.M. Reis^a
• 关键词：Olive oil deodorizer distillate (OODD) ; Rheology ; Shear bond strength
• 刊名：International Journal of Biological Macromolecules
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：82
• 期：Complete
• 页码：243-248
• 全文大小：721 K

文摘

Olive oil deodorizer distillate (OODD) was used for the first time as the sole substrate for polyhydroxyalkanoates (PHA) production by the bacterium Pseudomonas resinovorans in bioreactor cultivation. A PHA content in the biomass of 36 ± 0.8 wt% was attained within 19 h of cultivation. A final polymer concentration of 4.7 ± 0.3 g L⁻¹ was reached, corresponding to a volumetric productivity of 5.9 ± 0.2 g L⁻¹ day⁻¹. The PHA was composed of 3-hydroxyoctanoate (48.3 ± 7.3 mol%), 3-hydroxydecanoate (31.6 ± 2.6 mol%), 3-hydroxyhexanoate (12.1 ± 1.1 mol%) and 3-hydroxydodecanoate (8.0 ± 0.7 mol%) and it had a glue-like consistency that did not solidify at room temperature. The polymer was highly amorphous, as shown by its low crystallinity of 6 ± 0.2%, with low melting and glass transition temperatures of 36 ± 1.2 and −16 ± 0.8 °C, respectively. The polymer exhibited a shear thinning behavior and a mechanical spectrum with a predominant viscous contribution. Its shear bond strength for wood (67 ± 9.4 kPa) and glass (65 ± 7.3 kPa) suggests it may be used for the development of biobased glues.