Mechanical characteristics of nanocellulose-PEG bionanocomposite wound dressings in wet conditions

Sun, Fengzhen; Nordli, Henriette R.; Pukstad, Brita; Gamstedt, E. Kristofer; Chinga-Carrasco, Gary

doi:10.1016/j.jmbbm.2017.01.049

Cited by 74 publications

(53 citation statements)

References 47 publications

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“…A smaller standard deviation of the translucency histogram indicates a more homogeneous film structure. 15,16 The increase in porosity reflected by an increase in OTR may also be considered an advantage, depending on the type of wound. This is also confirmed by the skewness and by standard deviation of the translucency histogram.…”

Section: Resultsmentioning

confidence: 99%

“…15,16 The films were allowed to dry at room temperature (23 C). We have previously demonstrated that 40% PEG was an adequate fraction for increasing the ductility of CNF films without compromising the cytocompatibility of the material.…”

Section: Cnf Films and Humidity Sensor Fabricationmentioning

confidence: 99%

“…Fractionation processes involve hot water treatment (autohydrolysis), acid hydrolysis with different acids, alkaline treatments, supercritical CO 2 , solvent mixtures, hydrogen peroxide, ultrasound, and among others. [10][11][12][13][14][15] In addition, CNF forms relatively smooth substrates, a property which is most beneficial for printing purposes. 6 CNF is a good component for the formation of self-standing films with potential as, for example, barriers for food packaging applications 7 or for wound management.…”

Section: Introductionmentioning

confidence: 99%

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Wide range humidity sensors printed on biocomposite films of cellulose nanofibril and poly(ethylene glycol)

Syrový

Maronová

Kuberský

et al. 2019

J of Applied Polymer Sci

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Cellulose nanofibril (CNF) films were prepared from side streams generated by the sugarcane industry, that is, bagasse. Two fractionation processes were utilized for comparison purposes: (1) soda and (2) hot water and soda pretreatments. 2,2,6,6-Tetramethylpiperidinyl-1-oxyl-mediated oxidation was applied to facilitate the nanofibrillation of the bagasse fibers. Poly(ethylene glycol) (PEG) was chosen as plasticizer to improve the ductility of CNF films. The neat CNF and biocomposite films (CNF and 40% PEG) were used for fabrication of self-standing humidity sensors. CNF-based humidity sensors exhibited high change of impedance, within four orders of magnitude, in response to relative humidity (RH) from 20 to 90%. The use of plasticizer had an impact on sensor kinetics. While the biocomposite film sensors showed slightly longer response time, the recovery time of these plasticized sensors was two times shorter in comparison to sensors without PEG. This study demonstrated that agroindustrial side streams can form the basis for high-end applications such as humidity sensors, with potential for, for example, packaging and wound dressing applications.

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Section: Resultsmentioning

confidence: 99%

Section: Cnf Films and Humidity Sensor Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wide range humidity sensors printed on biocomposite films of cellulose nanofibril and poly(ethylene glycol)

Syrový

Maronová

Kuberský

et al. 2019

J of Applied Polymer Sci

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“…It is fabricated by mechanical or chemical treatment of cellulose resources. CNF has been considered for many potential applications such as oil industry, composite fabrication, coating, drug delivery, 3D printing inks, smart materials and so on [1][2][3][4] . CNF is isolated from many different cellulose sources such as wood and non-wood materials 5 .…”

Section: Introductionmentioning

confidence: 99%

Properties of TEMPO-oxidized cellulose nanofiber by using aqueous counter collision

et al. 2017

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Cellulose nanofiber (CNF) isolation from different resources influences the characteristics of the CNF. There are two methods to isolate CNFs, chemical and physical methods. This paper deals with a 2,2,6,6-tetramethylpiperidine-1-oxylradical (TEMPO-oxidation) chemical method and aqueous counter collision physical method to isolate CNFs. TEMPO-oxidized cellulose nanofiber was isolated using an aqueous counter collision method from two cellulose resource including Softwood bleached kraft pulp (SW) and Hardwood bleached kraft pulp (HW) resources. The CNFs properties were studied by atomic force microscopy, cross-polarize light and UV visible spectrometer. The width of the isolated CNFs is in the range of 15 nm to 20 nm and the length of cellulose nanofibers is around 1000 nm. The HW-CNF offers better transmittance than the SW-CNF. High transmittance of CNF films from both SW-CNF and HW-CNF was observed. In addition, the birefringence of CNFs was observed under cross polarized light. The SW-CNF and HW-CNF films showed birefringence phenomenon. More clear iridescence color of HW-CNF sample than that of SW-CNF case.

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“…The cellulose fibrils can be cleaved transversally when hydrolyzed in an acid medium, resulting in small crystals. These highly crystalline particles are referred to as nanocellulose, micro-crystalline cellulose, cellulose cristalito, nanocrystals of cellulose, whiskers or cellulose nanowhiskers when the L/D ratio is lower than 200 (Costa et al, 2016;Niu et al, 2017;Sun et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Characterization of cassava starch films plasticized with glycerol and strengthened with nanocellulose from green coconut fibers

Machado¹,

Reis²,

Cruz³

et al. 2017

Afr. J. Biotechnol.

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The aim of this study was to obtain and characterize biodegradable films of cassava starch plasticized with glycerol and reinforced with nanocellulose from coconut fibers. The mechanical and physicalchemical properties of the nano-biocomposites films obtained were evaluated. The method used to investigate the viability of incorporating coconut nanocellulose in films was applied through a statistical design of the response surface of 17 formulations containing three independent variables (starch, glycerol and nanocellulose). The films were prepared through casting technique, and the effect of different concentrations of the ingredients in each formulation was investigated by monitoring the dependent variables. The green coconut fiber was composed of 32% cellulose, 38% lignin and 0.25% hemicellulose resulted in nanocellulose with a length (L)/diameter(D) value of 38.9±4.7 after the acid hydrolysis process (64% H 2 SO 4 ; 50°C; 10-15 min). The incorporation of nanocellulose resulted in significant changes (p<0.05) in the barrier and mechanical properties. Additionally, there was a significant increase in the Young's modulus and in the tensile of the nano-biocomposites. Consequently, there was a decrease in the percentage of elongation. Thus, films formulated from cassava starch plasticized with glycerol could have significantly altered mechanical, technical and barrier properties due to the incorporation of coconut nanocellulose.

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Mechanical characteristics of nanocellulose-PEG bionanocomposite wound dressings in wet conditions

Cited by 74 publications

References 47 publications

Wide range humidity sensors printed on biocomposite films of cellulose nanofibril and poly(ethylene glycol)

Wide range humidity sensors printed on biocomposite films of cellulose nanofibril and poly(ethylene glycol)

Properties of TEMPO-oxidized cellulose nanofiber by using aqueous counter collision

Characterization of cassava starch films plasticized with glycerol and strengthened with nanocellulose from green coconut fibers

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