A comparison of cellulose nanofibrils produced from Cladophora glomerata algae and bleached eucalyptus pulp

Xiang, Zhouyang; Gao, Wenhua; Chen, Liheng; Lan, Wu; Zhu, Junyong; Runge, Troy

doi:10.1007/s10570-015-0840-7

Cited by 130 publications

(51 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 7 illustrates the XRD patterns of pure bacterial cellulose, bacterial cellulose/copper nanocomposite and bacterial cellulose/copper/zinc oxide nanocomposite. Figure 7a illustrates the sample of pure bacterial cellulose with distinguished peaks at 14.6 • , 16.9 • and 22.8 • , which correspond to crystallographic plane values (100), (010) and (110) respectively [64,65]. Similarly, in Figure 7b, it can be seen that the peak at 36.90 • and 43.7 • correspond to (002) and (220) plane reflection values of copper oxide and copper respectively in the sample of bacterial cellulose/copper nanocomposite [66].…”

Section: Eds Analysismentioning

confidence: 99%

Surface Modification of Bacterial Cellulose by Copper and Zinc Oxide Sputter Coating for UV-Resistance/Antistatic/Antibacterial Characteristics

et al. 2020

View full text Add to dashboard Cite

In our study, the surface of bacterial cellulose was successively modified by copper and zinc oxide nanoparticles using direct current (DC) magnetron sputtering and radio frequency (RF) reactive sputter coating techniques. The target materials, copper and zinc, were 99.99% pure and used in the presence of argon (Ar) gas, while zinc nanoparticles were sputtered in the presence of oxygen gas to make zinc oxide nanoparticles. The as-prepared bacterial cellulose/copper/zinc oxide nanocomposite has good ultraviolet resistance, anti-static and antibacterial characteristics. The surface morphology and chemical composition of the nanocomposite were examined by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopic (EDS) techniques. The prepared bacterial cellulose/copper/zinc oxide nanocomposite illustrates excellent ultraviolet resistance (T.UVA%; 0.16 ± 0.02, T.UVB%; 0.07 ± 0.01, ultraviolet protection factor (UPF); 1850.33 ± 2.12), antistatic behavior (S.H.P; 51.50 ± 4.10, I.E. V; 349.33 ± 6.02) and antibacterial behavior (Escherichia coli; 98.45%, Staphylococcus aureus; 98.11%). Our nanocomposite prepared by sputter coating method could be a promising and effective candidate for ultraviolet resistance, antistatic and antibacterial in term of functional, technical, medical and in many daily life applications.Coatings 2020, 10, 364 2 of 17 extensive attention toward its use as a conductive material due to its low resistance characteristic in such applications. Cellulosic materials such as bacterial cellulose (BC) do not show any type of bactericidal property [16]. In order to acquire the bactericidal characteristic from bacterial cellulose, many scientists have worked on bacterial cellulose, that work encompassing several types of metals and metal oxide nanoparticles, among which Cu, CuO and ZnO conclusively exist [17,18]. Additionally, Zinc oxide has distinguished properties and has been considered for serval applications in terms of piezoelectric gadgets, semiconductors and sensors, and for antimicrobial functions [19,20]. Nowadays, researchers have more interest in using zinc oxide in the composition of nanoparticles with different approaches to regulate its structure and scope. Preparation of a nanocomposite with suitable base materials and zinc oxide nanoparticles could advance multifunctional materials, which exhibit a wide range of UV-resistance and antibacterial applications [21,22].Human beings, as well as other living organisms, are affected by ultraviolet radiation in this universe. A decrease in environmental pollution has gained more attention, but there still needs to be a type of composite which can resist ultraviolet radiation to save the lives of all creatures [23,24]. The main cause of skin cancer is ultraviolet radiation, which is a medium of free radicals. Moreover, it is a cause of environmental degradation; and damages various pigments and materials and degrades their physical characteristics [25]. The deposition of zinc oxide nanoparticles on sub...

show abstract

Section: Eds Analysismentioning

confidence: 99%

Surface Modification of Bacterial Cellulose by Copper and Zinc Oxide Sputter Coating for UV-Resistance/Antistatic/Antibacterial Characteristics

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Many studies have investigated the isolation of CNFs. CNFs can be isolated through mechanical processes such as high-pressure homogenization (HPH) that force the suspension through a very narrow channel or orifice using a piston, under a high pressure of 50–2000 MPa [ 11 , 12 ], microfluidization that pumps the cellulose slurry at a constant shear rate through a z-shaped chamber to reach a high shear force [ 13 , 14 ], grinding that passes the cellulose slurry between static and rotating grindstones revolving at approximately 1500 rpm [ 15 , 16 ], and intensive ultrasonication that generates hydrodynamic forces of the ultrasound to defibrillate cellulose fibers [ 17 , 18 ]. Cellulose is generally organized into microfibers and connected with hemicellulose by Van der Waals forces and hydrogen bonds.…”

Section: Introductionmentioning

confidence: 99%

Environmentally-Friendly Extraction of Cellulose Nanofibers from Steam-Explosion Pretreated Sugar Beet Pulp

Yang

Feng

et al. 2018

Materials

View full text Add to dashboard Cite

Cellulose nanofibers (CNFs) with an average diameter of 22 nm were prepared from sugar beet pulp (SBP) via an environmentally-friendly method. Steam-explosion pretreated SBP was treated with hydrogen peroxide (H2O2) bleaching, high-speed blending, and ultrasonic treatment. Thermogravimetric analysis showed that hemicellulose was partially hydrolyzed in the steam-cooking stage, pectin was removed in the explosion stage, and lignin was removed by H2O2 bleaching. The removal of non-cellulosic components was confirmed by Fourier-transform infrared (FT-IR) spectroscopy. Morphological analysis showed that steam-explosion pretreatment largely extracted the binder materials of hemicellulose and pectin. This exposed the microfibrillated cellulosic fibers, which promoted subsequent nanofibrillation. X-ray diffraction showed that the CNFs had a crystallinity index of 62.3%. The CNFs had good thermal stability, and thus have potential for use as fillers in polymer matrices. The only chemical reagent used in this green method was H2O2. Combining H2O2 bleaching with steam explosion, high-speed blending, and ultrasonic treatment reduced the overall energy consumption and increased the efficiency of the CNFs extraction. The method, therefore, has potential application in industrial processes.

show abstract

“…Microfluidization, a similar process to HPH, could be used to produce nanocellulose from agricultural co-products, as Cladophora glomerata , an abundant green algae little exploited [ 57 ], oil palm mesocarp fibers, an industrial residue from palm oil production [ 58 ], hemp wastes [ 59 ], olive tree pruning residues [ 60 ], trunk of banana trees [ 61 ], as well as bagasse, a residual fibrous material from extraction of Agave tequilana juice [ 62 ]. However, microfluidization allowed generally to obtain long cellulose fibrils of several micrometers [ 59 ], so this process was often coupled with chemical pretreatments, as acid hydrolysis [ 58 ], TEMPO-oxidation [ 60 ], or organosolv process [ 62 ].…”

Section: Eco-friendly Pickering Emulsionsmentioning

confidence: 99%

Interest of Pickering Emulsions for Sustainable Micro/Nanocellulose in Food and Cosmetic Applications

Perrin

Gillet²,

Gressin³

et al. 2020

Polymers

View full text Add to dashboard Cite

In the present review, natural and non-toxic particles made of micro/nanocellulose were specifically targeted as stabilizers of emulsions located at dispersed and continuous phases interfaces (called Pickering Emulsions, PEs). PEs are biphasic systems stabilized by solid particles with a recent interest in food and cosmetic domains. PEs have been more and more studied in the last ten years due to their advantages compared to conventional emulsions with surfactants. PEs have already been stabilized with various types of particles and particularly cellulose. Even if some studies showed that PEs were more stable when cellulose was chemically modified, numerous other recent studies showed that unmodified micro/nanocellulose is also promising biomaterial to stabilize PEs. Micro/nanocelluloses can be extracted by various green processes from numerous agricultural wastes and co-products, as banana peels, corncob, ginkgo seed shells, lime residues, mangosteen rind, oil palm empty fruit bunches, pistachio shells, as well as wheat straw. Main green processes used to treat cellulose are grinding, high pressure homogenization, microfluidization, enzymatic hydrolysis, subcritical water, extrusion, electron beam irradiation, cryocrushing, microwaves or sonication. PEs formulated with cellulose clearly participate to a global sustainable development but, additional studies will be necessary to better understand PEs stability and improve properties.

show abstract

A comparison of cellulose nanofibrils produced from Cladophora glomerata algae and bleached eucalyptus pulp

Cited by 130 publications

References 37 publications

Surface Modification of Bacterial Cellulose by Copper and Zinc Oxide Sputter Coating for UV-Resistance/Antistatic/Antibacterial Characteristics

Surface Modification of Bacterial Cellulose by Copper and Zinc Oxide Sputter Coating for UV-Resistance/Antistatic/Antibacterial Characteristics

Environmentally-Friendly Extraction of Cellulose Nanofibers from Steam-Explosion Pretreated Sugar Beet Pulp

Interest of Pickering Emulsions for Sustainable Micro/Nanocellulose in Food and Cosmetic Applications

Contact Info

Product

Resources

About