Isolation and characterization of nanocellulose crystals via acid hydrolysis from agricultural waste-tea stalk

Guo, Yang; Zhang, Yangyang; Zheng, Da Wei; Li, Mengyang; Yue, Jinquan

doi:10.1016/j.ijbiomac.2020.07.009

Cited by 79 publications

(21 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value is well below the agglomeration range (−15 mV) and close to the ζ potential value known for better stability (−30 mV). Guo et al 89 used sulfuric acid hydrolysis to create cellulose nanocrystals, produced using agricultural waste tea stalks, with a ζ potential of −33.4 mV.…”

Section: Results and Discussionmentioning

confidence: 99%

Isolation and Characterization of Cellulose Nanocrystals from Date Palm Waste

et al. 2022

View full text Add to dashboard Cite

This study presents the isolation, characterization, and kinetic analyses of cellulose nanocrystals (CNCs) from date palm waste in the United Arab Emirates. After bleaching date palm stem waste with acidified NaClO 2 and delignification via NaOH treatments, cellulose was extracted. Mineral acid hydrolysis (62 wt % H 2 SO 4 ) was performed at 45 °C for 45 min to produce crystalline nanocellulose. Fourier transform infrared (FTIR) and chemical composition analysis confirmed the removal of noncellulosic constituents. The crystallinity index increased gradually with chemical treatments, according to the obtained X-ray diffraction (XRD) results. Thermogravimetric analysis and differential scanning calorimetry results revealed that the CNC has high thermal stability. The Coats–Redfern method was used to determine the kinetic parameters. The kinetic analysis confirmed that CNC has more activation energy than cellulose and thus confirms its compact and resistive crystalline structure. This has been attributable to the stronger hydrogen bonding in CNC crystalline domains than that in cellulose crystalline domains. Scanning electron microscopy revealed that lignin and hemicellulose were eliminated after chemical pretreatments, and CNC with a rodlike shape was obtained after hydrolysis. Moreover, transmission electron microscopy confirmed the nanoscale of crystalline cellulose. ζ potential analysis indicated that the CNC afforded a stable suspension (−29.27 mV), which is less prone to flocculation. Kinetic analyses of cellulose and cellulose nanocrystals isolated from date palm waste are useful for making composites and designing selective pyrolysis reactors.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Isolation and Characterization of Cellulose Nanocrystals from Date Palm Waste

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Besides the wood and lignocellulosic fibers, a more convenient alternative from both an environmental and an economic point of view is represented by the agriculture along with food and beverage-processing waste and byproducts. Thus, CNCs are predominantly extracted from corn cobs [ 60 ], tea stalk [ 61 ], soy hulls [ 62 ], apple [ 63 ] and grape pomace [ 64 ], pineapple leaves [ 65 ], soybean [ 66 ], plum shells [ 67 ], barley [ 68 ] and garlic [ 69 ] straws, tomato peel waste [ 70 ], sugarcane bagasse [ 71 ], orange peel waste [ 72 ], or chili leftovers [ 73 ]. However, the exploitation of municipal waste and papermaking sludge may represent other alternative sources [ 58 , 74 ].…”

Section: Cellulose Nanocrystalsmentioning

confidence: 99%

Poly(3-hydroxybutyrate) Nanocomposites with Cellulose Nanocrystals

et al. 2022

View full text Add to dashboard Cite

Poly(3-hydroxybutyrate) (PHB) is one of the most promising substitutes for the petroleum-based polymers used in the packaging and biomedical fields due to its biodegradability, biocompatibility, good stiffness, and strength, along with its good gas-barrier properties. One route to overcome some of the PHB’s weaknesses, such as its slow crystallization, brittleness, modest thermal stability, and low melt strength is the addition of cellulose nanocrystals (CNCs) and the production of PHB/CNCs nanocomposites. Choosing the adequate processing technology for the fabrication of the PHB/CNCs nanocomposites and a suitable surface treatment for the CNCs are key factors in obtaining a good interfacial adhesion, superior thermal stability, and mechanical performances for the resulting nanocomposites. The information provided in this review related to the preparation routes, thermal, mechanical, and barrier properties of the PHB/CNCs nanocomposites may represent a starting point in finding new strategies to reduce the manufacturing costs or to design better technological solutions for the production of these materials at industrial scale. It is outlined in this review that the use of low-value biomass resources in the obtaining of both PHB and CNCs might be a safe track for a circular and bio-based economy. Undoubtedly, the PHB/CNCs nanocomposites will be an important part of a greener future in terms of successful replacement of the conventional plastic materials in many engineering and biomedical applications.

show abstract

“…Cotton fibre CNCs [16] Cotton linter pulp CNCs [17] Carrot pomace CNFs [18] Tea stalk CNCs [19] Peach palm CNFs [14] Coconut husk CNCs [20] Sago fronds CNCs [21] /Kelp CNFs [22] Corn husks CNCs [23] Soybean straw CNCs CNFs [24] Oil palm empty fruit bunch CNFs [25] [15] Dried mangosteen rind CNFs [26] Asparagus (old spears and stems) CNCs [27] Ginkgo seed shells CNCs [28]…”

Section: Cellulosementioning

confidence: 99%

Potential of nanoemulsion process and method using agro-industrial based materials in skincare formulations: A review

Ali

Hambali

Fahma

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Nanoemulsion technology in the skincare production process plays an important role in improving product quality. Nanoemulsion has a small droplet size which increases the ability of the active compounds to penetrate the skin. Nanoemulsion forming components are similar to conventional methods but the dispersed particles and droplets are smaller in size with a diameter of 20-200 nm. Nanoemulsion has been widely applied to skincare products to increase stability and to improve quality. Agro-industrial based nanoemulsions have potential in the formulation of skincare products. A general description of the formulation, process and application of skincare products will be presented in the discussion. The method used consists of two parts, namely the high energy method which includes microfluidization, high pressure homogenization and ultrasonication, while the low energy method consists of phase inversion composition, phase transition temperature, solvent displacement and newly developed approaches such as D phase emulsification. The purpose of this literature study is to discuss the process and methods of skincare nanoemulsion formulations to increase stability, the potential of agro-industrial based material as a nanoemulsion and cover the potential for scale-up.

show abstract

Isolation and characterization of nanocellulose crystals via acid hydrolysis from agricultural waste-tea stalk

Cited by 79 publications

References 21 publications

Isolation and Characterization of Cellulose Nanocrystals from Date Palm Waste

Isolation and Characterization of Cellulose Nanocrystals from Date Palm Waste

Poly(3-hydroxybutyrate) Nanocomposites with Cellulose Nanocrystals

Potential of nanoemulsion process and method using agro-industrial based materials in skincare formulations: A review

Contact Info

Product

Resources

About