Vaccination of biological cellulose fibers with glucose: A gateway to novel nanocomposites

Fahmy, Tamer Y.A.; Mobarak, Fardous

doi:10.1016/j.ijbiomac.2007.09.008

Cited by 18 publications

(15 citation statements)

References 3 publications

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“…The incorporation methods used in the present work were recently established by the authors and others (Fahmy, 2007a(Fahmy, , 2007bFahmy & Mobarak, 2008a, 2008bFahmy et al, 2006). After several preliminary experiments, we fixed the optimum conditions for manipulating the nanoadditive (molasses) as a retention aid and strength promoter.…”

Section: Incorporating the Nanoadditive (Molasses) Into The Nanoporoumentioning

confidence: 99%

“…This was achieved by incorporating the nanoporous structure, of water swollen cellulose fibers, by the nanoadditives sucrose and glucose (Fahmy & Mobarak, 2008a;Fahmy, Mobarak, Fahmy, Fadl, & El-Sakhawy, 2006).…”

Section: Introduction and Objectmentioning

confidence: 99%

“…Thus the incorporation of sucrose or glucose into cellulose fibers leads to nanocomposites of increased water uptake (water retention value), and increased reactivity (i.e. increased accessibility to reagents) (Fahmy & Mobarak, 2008a;Fahmy et al, 2006). It was, also, shown that incorporating the nanoporous structure of cellulose fibers, with sucrose, leads to paper nanocomposites of enhanced strength (breaking length).…”

Section: Introduction and Objectmentioning

confidence: 99%

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Advanced nano-based manipulations of molasses in the cellulose and paper discipline: Introducing a master cheap environmentally safe retention aid and strength promoter in papermaking

Fahmy

Mobarak

2009

Carbohydrate Polymers

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a b s t r a c tThis work introduces, for the first time worldwide, molasses -a byproduct of the sugar industry -as a master retention aid and strength promoter in papermaking. The paper nanocomposites produced in the present work -involving molasses, natural cellulose fibers, and kaolin -retained larger amounts of kaolin while exhibiting greater strength, as compared to their molasses-free counterparts. Recently, the authors have shown, for the first time, that the nanoadditive sucrose can overcome the ultimate fate of deterioration in strength of paper, due to addition of inorganic fillers such as kaolin. This deterioration was counteracted by incorporating the nanoporous structure of cellulose fibers with sucrose, which leads to incorporation beating of the fibers, and thus increases the strength of the produced paper nanocomposites. In addition, the nanoadditive sucrose was proven -for the first time -to act as retention aid for inorganic fillers such as kaolin. We called this phenomenon incorporation retention to differentiate it from the conventional types of retention of inorganic fillers. On the other hand, it is well established in the literature that using gums (including starch) as additives in papermaking enhances the strength of paper. Molasses contains both the nanoadditive (sucrose), and gums (including starch). Molasses is a byproduct of sugar industry, which is cheaper than sucrose; and a major part of sucrose lost in sugar industry resides in molasses. Moreover, molasses is an environmentally safe additive. Therefore, the nanoadditive (molasses) was chosen, in the present work, to be manipulated as a master strength promoting retention aid for inorganic fillers used in papermaking, such as kaolin.

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Section: Incorporating the Nanoadditive (Molasses) Into The Nanoporoumentioning

confidence: 99%

Section: Introduction and Objectmentioning

confidence: 99%

Section: Introduction and Objectmentioning

confidence: 99%

See 1 more Smart Citation

Advanced nano-based manipulations of molasses in the cellulose and paper discipline: Introducing a master cheap environmentally safe retention aid and strength promoter in papermaking

Fahmy

Mobarak

2009

Carbohydrate Polymers

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“…Recently, the authors introduced fully green nanotechnology as a gateway to beneficiation of natural cellulose fibers [2][3][4][5]. Thermal pretreatment has been conducted in moist environments using hot water or steam at temperatures up to 160 and 240°C, respectively, or in dry environments using inert gases at temperatures up to 240°C [6,7].…”

Section: Introductionmentioning

confidence: 99%

Unraveling the structural characteristics of lignin in hydrothermal pretreated fibers and manufactured binderless boards from Eucalyptus grandis

Xiao

Zhi

Peng

et al. 2014

Sustain Chem Process

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Background: Eucalyptus grandis is one of the most abundant biomass from plantation in many parts of the world. The binderless board were manufactured from hydrothermal pretreated fibers of Eucalyptus wood and characterized for the chemical analyses and mechanical strengths in order to assess the mechanism of self-bonding. To make clear the self-bonding mechanism of these binderless boards, the structural characteristics of cellulolytic enzyme lignin (CEL) isolated from Eucalyptus wood, its hydrothermal pretreated fibers, and binderless boards were thoroughly investigated by chemical and spectroscopic methods. Results: The result revealed that hydrothermal pretreatment and hot pressing process could change cellulose crystalline structures by disrupting inter/intra hydrogen bonding of cellulose chains. During the hydrothermal pretreatment of Eucalyptus wood, acid-catalyzed cleavage of β-O-4′ linkages and ester bonds were the major mechanisms of lignin cleavage. This degradation pathway led to a more condensed lignin which has a high average molecular weight and more phenolic hydroxyl groups than the control. The hot pressing process resulted in the binderless boards with reduced lignin contents and decreased the glass transition temperature, thus making the lignin more accessible to the fiber surface. CEL isolated from the binderless boards showed an increased syringyl to guaiacyl propane (S/G) ratio but a lower molecular weight than those of the untreated Eucalyptus wood and the hydrothermal pretreated fibers.Conclusions: Based on the finding of this study, it is suggested that the combination of hydrothermal pretreatment and hot pressing process is a good way for conditioning hardwood sawdust for the production of binderless boards. The thermal softening of lignin, rich in phenolic hydroxyl groups, and increased condensed lignin structure contributed to the self-bonding formation of lignocellulosic materials.

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“…Recently, we discovered -for the first time worldwide -the means to preserve and protect the natural nanoporous structure of the never-dried plant cell wall, against the irreversible collapse which occurs due to drying [1]. Our recent work showed, for the first time worldwide, that glucose can be vaccinated into the cell wall micropores or nanostructure of the never-dried biological cellulose fibers to create a reactive novel nanocomposite material.…”

Section: Introduction and Objectmentioning

confidence: 99%

Green nanotechnology: A short cut to beneficiation of natural fibers

Fahmy

Mobarak

2011

International Journal of Biological Macromolecules

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For the first time worldwide, it is shown that our novel nanocomposite produced from natural fibers vaccinated with glucose--by fully green nanotechnology--possesses surprising reactivity towards urea. Magic super absorbent carbamated nanocomposite cotton fabrics having remarkable distinguished properties were obtained in few minutes. It is well established that carbamates possess antibacterial effects. The produced magic nanocomposite fabrics, we discovered for the first time worldwide, find their use as woven or nonwoven hygienic pads, bandages or paper nanocomposites.

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Vaccination of biological cellulose fibers with glucose: A gateway to novel nanocomposites

Cited by 18 publications

References 3 publications

Advanced nano-based manipulations of molasses in the cellulose and paper discipline: Introducing a master cheap environmentally safe retention aid and strength promoter in papermaking

Advanced nano-based manipulations of molasses in the cellulose and paper discipline: Introducing a master cheap environmentally safe retention aid and strength promoter in papermaking

Unraveling the structural characteristics of lignin in hydrothermal pretreated fibers and manufactured binderless boards from Eucalyptus grandis

Green nanotechnology: A short cut to beneficiation of natural fibers

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