Abstract
Background: Nanocrystalline celluloses (NCCs), also known as nanocelluloses derived
from natural renewable resources, have elicited much interest from researchers. The annual local
agricultural residues of pineapple leaves and sugarcane bagasse are abundant and must be used
properly. The detailed comparative analysis of chemical, physical and thermal properties conducted
in this work demonstrates that several types of agro-waste can be utilised economically and reasonably
for various applications.
Methods: NCCs were successfully isolated by the pre-treatment (alkaline and bleaching) and acid
hydrolysis of pineapple leaves and sugarcane bagasse. The structural, crystallinity, morphological
and thermal properties were evaluated via Fourier transform infrared spectroscopy (FTIR), scanning
electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and
thermogravimetric analysis (TGA).
Results: The FTIR spectra revealed an extensive removal of hemicellulose and lignin from the extracted
NCC. Morphological investigations conducted through TEM revealed that the NCC
nanostructure had a needle-like shape, whereas SEM showed an irregular rod-like shape. The XRD
pattern proved the crystallinity of the isolated NCC from both samples. The crystallinity indices of
NCC from pineapple leaves and sugarcane bagasse were 76.38% and 74.60%, respectively. NCC’s
thermal stability increased in both samples at different purification stages.
Conclusion: Pineapple leaves and sugarcane bagasse can be the industry’s primary source of raw
materials and a possible alternative for costly and non-renewable materials. The use of NCCs from
these agro-waste forms is beneficial and can provide considerable biomass to the agricultural industry
with nano-energy-based markets.
Keywords:
Renewable, nanocrystalline cellulose, agricultural residue, pineapple leaves, sugarcane bagasse, isolation
Graphical Abstract
[3]
Tholibon, D.; Tharazi, I.; Sulong, A.B.; Muhamad, N.; Ismail, N.F.; Md Radzi, M.K.; Radzuan, N.A.M.; Hui, D. Kenaf fiber composites : a review on synthetic and biodegradable polymer matrix. J. Kejuruteraan, 2019, 31, 65-76.
[22]
Riantong, S.; Worasit, T.; Teeraporn, K.; Chiroporn, S. Extraction and properties of cellulose from banana peels. Warasan Technol. Suranaree, 2014, 21, 215-232.
[25]
He, J.; Tang, Y.; Wang, S.Y. Differences in morphological characteristics of bamboo fibres and other natural cellulose fibres: Studies on X-ray diffraction, solid state 13C-CP/MAS NMR, and second derivative FTIR spectroscopy data. Iran. Polym. J., 2007, 16, 807-818.
[27]
Shanmugam, N.; Nagarkar, R.D.; Kurhade, M. Microcrystalline cellulose powder from banana pseudostem fibres using bio-chemical route. Indian J. Nat. Prod. Resour., 2015, 6, 42-50.
[28]
Okon, O.; Eduok, U.; Israel, A. Characterization and phytochemical screening of coconut (Cocos nucifera L.) Coir dust as a low cost adsorbent for wastewater treatment. Elixir. Appl. Chem., 2012, 47, 8961-8968.
[31]
Wulandari, W.T.; Rochliadi, A.; Arcana, I.M. Nanocellulose prepared by acid hydrolysis of isolated cellulose from sugarcane bagasse. Mater. Sci. Eng., 2016, 107, 1-7.
[36]
Pereira, P.H.F.; Voorwald, H.C.J.; Cioffi, M.O.H.; Mulinari, D.R.; da Luz, S.M.; da Silva, M.L.C.P. Sugarcane bagasse pulping and bleaching: Thermal and chemical characterization. BioResources, 2011, 6, 2471-2482.
[40]
Teixeira, J.G.; Gomes, M.G.; Oliveira, R.R.; Silva, V.A.; Mariana, M. Sugarcane Bagasse Ash Reinforced HDPE Composites : Effects of Electron-Beam Radiation Crosslinking on Tensile and Morphological Properties. International Nuclear Atlantic Conference, 2013, pp. 1-10.
[41]
Zeni, M.; Favero, D.; Pacheco, K.; Ana Grisa, M. Preparation of microcellulose (MCC) and nanocellulose (NCC) from Eucalyptus Kraft Ssp Pulp. Polym. Sci., 2015, 1, 1-7.
[49]
Santmartí, A.; Lee, K.Y. Crystallinity and Thermal Stability of Nanocellulose; Nanocell. Sust, 2018, pp. 67-86.