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Bio-based films/nanopapers from lignocellulosic wastes for production of added-value micro-/nanomaterials

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Abstract

The growing demand for products with lower environmental impact and the extensive applicability of cellulose nanofibrils (CNFs) have received attention due to their attractive properties. In this study, bio-based films/nanopapers were produced with CNFs from banana tree pseudostem (BTPT) wastes and Eucalyptus kraft cellulose (EKC) and were evaluated by their properties, such as mechanical strength, biodegradability, and light transmittance. The CNFs were produced by mechanical fibrillation (after 20 and 40 passages) from suspensions of BTPT (alkaline pre-treated) and EKC. Films/nanopapers were produced by casting from both suspensions with concentrations of 2% (based in dry mass of CNF). The BTPT films/nanopapers showed greater mechanical properties, with Young’s modulus and tensile strength around 2.42 GPa and 51 MPa (after 40 passages), respectively. On the other hand, the EKC samples showed lower disintegration in water after 24 h and biodegradability. The increase in the number of fibrillation cycles produced more transparent films/nanopapers and caused a significant reduction of water absorption for both raw materials. The permeability was similar for the films/nanopapers from BTPT and EKC. This study indicated that attractive mechanical properties and biodegradability, besides low cost, could be achieved by bio-based nanomaterials, with potential for being applied as emulsifying agents and special membranes, enabling more efficient utilization of agricultural wastes.

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Data availability

The datasets supporting the conclusions of this article are included in the article. Besides, the datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

CNFs:

Cellulose nanofibrils

BTPT:

Banana tree pseudostem

EKC:

Eucalyptus kraft pulp

SEM:

Scanning electron microscopy

FEG:

Field emission gun

TS:

Tensile strength

DW:

Disintegration in water

WA:

Water absorption

FTIR:

Fourier transform infrared spectroscopy

WVTR:

Water vapor transmission rate

Md:

Average diameter

Sd:

Standard deviation

T:

Transmittance

RH:

Relative humidity

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Acknowledgements

The authors thank the Coordenacão de Aperfeiçoamento de Pessoa de Nível Superior (CAPES, Brazil), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brazil), and Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG, Brazil) for their financial support. Thanks are due also to Embrapa Instrumentação (São Carlos/SP, Brazil), to the Brazilian Lignocellulosic Composites and Nanocomposites Network (RELIGAR), and to the Biomaterials Engineering Graduation Program (PPGBIOMAT-UFLA, Brazil). Finally, thanks go to the Laboratory of Electron Microscopy and Analysis of the Ultrastructural Federal University of Lavras, (http://www.prp.ufla.br/labs/microscopiaeletronica/) for the technical support for experiments involving electron microscopy.

Funding

Fundação de Amparo à Pesquisa do Estado de Minas Gerais - FAPEMIG, Coordenação de Aperfeiçoamento de Pessoa de Nível Superior – CAPES (finance code 001), and Conselho Nacional de Desenvolvimento Científico e Tecnológico – CNPq (151379/19).

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Contributions

BMRG contributed with the writing of the initial version, review, data collection, and data analysis. MVS and MAM were major contributors in writing the manuscript, specifically writing the initial version, review, and editing of the manuscript. SRF and LMM contributed to the search for new raw materials resources and review. JTL, MGJ, and GHDT contributed with supervision, conceptualization, funding acquisition, and project administration. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Mário Vanoli Scatolino.

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The authors declare no competing interests.

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Responsible Editor: Santiago V. Luis

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Guimarães, .M.R., Scatolino, M.V., Martins, M.A. et al. Bio-based films/nanopapers from lignocellulosic wastes for production of added-value micro-/nanomaterials. Environ Sci Pollut Res 29, 8665–8683 (2022). https://doi.org/10.1007/s11356-021-16203-4

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  • DOI: https://doi.org/10.1007/s11356-021-16203-4

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