02462nas a2200289   4500008004100000022001400041245015400055210006900209260000900278300001400287490000800301520141200309653002501721653002601746653002101772100001801793700002701811700002501838700003701863700003201900700002501932700002101957700001901978700002301997700002002020856013202040       2022                        eng d  a0141-813000aEffect of oxalic acid and sulphuric acid hydrolysis on the preparation and properties of pineapple pomace derived cellulose nanofibers and nanopapers0 aEffect of oxalic acid and sulphuric acid hydrolysis on the prepa  cJUN   a1745-17590 v2093 a<p>
	Nanocellulose is the ``green magnet'' which attracts a wide spectrum of industries towards it due to its availability, biodegradability, and possible smart applications. For the first time, pineapple pomace was being explored as an economic precursor for cellulose nanofibers. Nanofiber isolation was accomplished using a chemo-mechanical method and solution casting was adopted for the development of nanopapers. Moreover, the study examines the structural, optical, crystalline, dimensional, and thermal features of nanofibers isolated using different acid hydrolysis (oxalic acid and sulphuric acid) methods. Fourier-transform infra-red spectroscopy, 13C solid-state nuclear magnetic resonance spectroscopy, and X-ray diffraction analysis indicated the presence of type I cellulose. The transmittance, crystallinity index, and thermal stability of PPNFS (sulphuric acid treated fiber) were greater than PPNFO (oxalic acid treated fiber). The transmission electron microscopy and dynamic light scattering analysis confirmed the nanodimension of PPNFO and PPNFS. While comparing the optical and mechanical properties of nanopapers, PPNFS outperforms PPNFO. The tensile strength of the prepared nanopapers (64 MPa (PPNFO) and 68 MPa (PPNFS)) was found to be high compared to similar works reported in the literature. The prepared nanopaper is proposed to be used for food packaging applications.</p>
10acellulose nanofibers10aCellulosic nanopapers10aPineapple pomace1 aNeenu, K., V.1 aDominic, C., D. Midhun1 aBegum, P., M. Sabura1 aParameswaranpillai, Jyotishkumar1 aKanoth, Bipinbal, Parambath1 aDavid, Deepthi, Anna1 aSajadi, Mohammad1 aDhanyasree, P.1 aAjithkumar, T., G.1 aBadawi, Michael  uhttps://library.ncl.res.in/content/effect-oxalic-acid-and-sulphuric-acid-hydrolysis-preparation-and-properties-pineapple-pomace02532nas a2200337   4500008004100000022001400041245012300055210006900178260000800247300001600255490000700271520139300278653002001671653002501691653003001716653002301746100002701769700001801796700001801814700002101832700002901853700002501882700001901907700002301926700003701949700002701986700001802013700001802031700002002049856012502069       2024                        eng d  a2190-681500aColocasia esculenta stems for the isolation of cellulose nanofibers: a chlorine-free method for the biomass conversion0 aColocasia esculenta stems for the isolation of cellulose nanofib  cMAY  a10305-103180 v143 a<p>
	The reuse of waste products is the green key to sustainability. The extraction of cellulose nanofibers from Colocasia esculenta stems is presented in the paper. The study proved that the waste biomass could be effectively re-engineered into highly valued cellulose nanofibers (CNFs). Cellulose nanofibers were extracted via a chemo-mechanical route. The pre-treatments included mild alkali hydrolysis (2% NaOH) and chlorine-free bleaching (peroxide bleaching in an alkaline medium). Cellulose I-beta structure was confirmed using C-13 solid-state nuclear magnetic resonance spectroscopy and X-ray diffraction analysis. The elemental analysis of CNFs detected the elements, carbon and oxygen. The CNFs had a crystallinity and transmittance of 71.72% and 60%, respectively. Microscopic studies verified the elimination of non-cellulosic components and the fibrous nature of CNFs. Moreover, the fiber diameter of CNFs was 20-40 nm. Thermal analysis revealed good thermal stability of 335.8 degrees C (T-50) for nanofibers. Long-term aids are numerous in eco-friendly technology. Developing an eco-design will support zero waste ideals, lowers carbon dioxide emissions, and encourages a circular economy. Owing to the merits of natural fibers, they can be adopted in various sectors including packaging, automobile, aerospace, electronics, biomedical, construction, and furniture.</p>
10aacid hydrolysis10acellulose nanofibers10aColocasia esculenta stems10aHigh crystallinity1 aDominic, C., D. Midhun1 aMaheswary, S.1 aNeenu, V., K.1 aSajadi, Mohammad1 aRosa, Derval, dos Santos1 aBegum, P., M. Sabura1 aMathew, Mariya1 aAjithkumar, T., G.1 aParameswaranpillai, Jyotishkumar1 aGeorge, Tresa, Sunitha1 aResmi, V., C.1 aIlyas, R., A.1 aBadawi, Michael  uhttps://library.ncl.res.in/content/colocasia-esculenta-stems-isolation-cellulose-nanofibers-chlorine-free-method-biomass