Preparation and characterization of some cellulose derivatives nanocomposite films

Gökmen, Fatma Özge; Bayramgil, Nursel Pekel

doi:10.1016/j.carbpol.2022.120030

Cited by 5 publications

(1 citation statement)

References 61 publications

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“…Several studies offer a detailed analysis of polymer mixtures morphologically and structurally [ 15 , 17 , 18 ]. The techniques used aim to reveal the structure and the film surface image, as well as to present the interaction between the system’s compounds [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

(Hydroxypropyl)methyl Cellulose-Chitosan Film as a Matrix for Lipase Immobilization—Part ΙΙ: Structural Studies

Vassiliadi

Tsirigotis-Maniecka

Symons

et al. 2022

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The present work reports on the structural study of a film made of a hybrid blend of biopolymers used as an enzyme carrier. A cellulose derivative (HPMC) and chitosan (CS) were combined in order to formulate a film on which Mucor miehei lipase was immobilized. The film was successfully used as a biocatalyst; however, little is known about the structure of the system. Therefore, small-angle X-ray scattering, Fourier transform infrared spectroscopy (FTIR), optical microscopy, and scanning electron microscopy (SEM), as well as microindentation measurements, were used to shed light on the structure of the promising biocatalyst. Among the results, intermolecular hydrogen bonds were observed between the amide groups of the two polymers and the lipase. The presence of the enzyme does not seem to affect the mechanical properties of the matrix. The used film after 35 cycles of reaction seemed to be fatigued and had lost part of its humidity, explaining the reduction of the enzyme activity.

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