03364nas a2200241 4500008004100000245018600041210006900227260000800296300001400304490000700318520242800325100002002753700001802773700003702791700002302828700002702851700002502878700002102903700002702924700002002951700002002971856013102991 2025 eng d00aGreen engineering of cellulose nanofibers and nanopapers from Wodyetia bifurcata fruits: a sustainable approach with emphasis on process optimization and tensile property assessment0 aGreen engineering of cellulose nanofibers and nanopapers from Wo cMAY a9321-93350 v153 a

Nanocellulose emerges as a highly promising material with versatile applications, offering solutions to environmental and sustainability challenges. This study delves into the extraction of cellulose nanofibers (CNFs) from Wodyetia bifurcata fruit pulp through mild oxalic acid hydrolysis assisted by steam explosion. To ensure environmental compatibility, chlorine-free pre-treatments were applied to eliminate non-cellulosic components. Chemical composition analysis verified the effective removal of non-cellulosic elements, validated by Fourier transform infrared spectroscopy (FTIR). Solid-state 13C nuclear magnetic resonance (13C NMR) spectroscopy confirmed the presence of type I cellulose α-polymorph in the CNF, while a crystallinity index of 60% was determined by X-ray diffraction analysis (XRD). The transmission electron microscopy (TEM) images revealed a fibrous morphology with a fiber diameter ranging from 9 to 36 nm. Dynamic light scattering (DLS) was employed to corroborate the observed fiber diameter. Mild acid hydrolysis elevated the maximum degradation temperature (Tmax) of CNF to 39 °C compared to the pristine sample. Furthermore, this research explores the application of CNFs in nanopaper development using a casting method. The resulting nanopapers exhibited a tensile strength of ~ 17 MPa and a transmittance of 25%. These nanopapers present a viable pathway toward eco-friendly products in various industries, promising to revolutionize upcoming sustainable packaging technologies.

1 aSankar, Sameera1 aNeenu, K., V.1 aParameswaranpillai, Jyotishkumar1 aAjithkumar, T., G.1 aShelke, Ankita, Ramesh1 aBegum, P., M. Sabura1 aBipinbal, P., K.1 aGeorge, Tresa, Sunitha1 aBadawi, Michael1 aDominic, Midhun uhttps://library.ncl.res.in/content/green-engineering-cellulose-nanofibers-and-nanopapers-wodyetia-bifurcata-fruits-sustainable02339nas a2200241 4500008004100000245012900041210006900170260000800239300001600247490000700263520145600270100001901726700001801745700002501763700003001788700002001818700002501838700002301863700002301886700003701909700002701946856012401973 2025 eng d00aValorization of avocado peel waste: extraction and characterization of cellulose nanofibers for multifunctional applications0 aValorization of avocado peel waste extraction and characterizati cAPR a12789-128000 v153 a

This study explored the utility of underutilized avocado peels for extracting cellulose nanofibers (CNFs). Mild oxalic acid hydrolysis assisted by steam explosion was employed after alkali hydrolysis and chlorine-free bleaching to prepare cellulose nanofibers. The structural, atomic, and elemental features of the extracted fibers were studied using Fourier transform infrared spectroscopy (FTIR), 13C solid-state nuclear magnetic resonance (13C NMR) spectroscopy, and energy dispersive X-ray (EDAX) analysis, respectively. The crystallinity index of the nanofibers was 87%, which was 53% greater than that of the crude sample. The elution of hemicellulose and lignin was evident from the scanning electron microscopy (SEM) images, and the nanofibers had a fiber diameter of 30–82 nm according to the transmission electron microscopy (TEM) analysis. The applied chemical treatment also elevated the thermal stability of the fibers. The extracted fibers can be applied in numerous fields, including electronics, packaging, automobiles, biomedicine, and cosmetics.

1 aVarsha, P., V.1 aNeenu, K., V.1 aBegum, P., M. Sabura1 aHounfodji, Jean, Wilfried1 aSankar, Sameera1 aMuraleedharan, Sneha1 aKamath, Anjali, N.1 aAjithkumar, T., G.1 aParameswaranpillai, Jyotishkumar1 aMidhun, Dominic, C. D. uhttps://library.ncl.res.in/content/valorization-avocado-peel-waste-extraction-and-characterization-cellulose-nanofibers