An Optimum Mixture of Virgin Rice Straw Pulp and Recycled Old Newsprint Pulp and their Antimicrobial Activity

Nassar, Mona A.; Awad, Hassan M.; El-Sahkawy, Mohamed; Hassan, Youssef R.

doi:10.14716/ijtech.v6i1.288

Cited by 9 publications

(9 citation statements)

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“…Several chemical compounds, such as polyphenols, flavanoids, ellagitannis (tannins) and proanthocyanidins essential oils were found in E. camaldulensis extract [ 38 ]. These extracts have been shown to have good antifungal activities against certain molds [ 39 , 40 ].…”

Section: Resultsmentioning

confidence: 99%

Assessment of the Impact of Different Treatments on the Technological and Antifungal Properties of Papyrus (Cyperus Papyrus L.) Sheets

et al. 2019

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In the present work, sheets of Papyrus (Cyperus papyrus L.), manufactured by lamination from strips pre-treated with different treatments, were evaluated for their technological and fungal infestation properties (Aspergillus flavus AFl375, A. niger Ani245 and Colletotrichum gloeosporioides Cgl311). The results showed that the highest values of tensile strength, tear strength, burst index and double-fold number were observed in papyrus sheets produced from strips treated with nano-cellulose (0.25%), dimethyl sulfoxide (DMSO 10%), Tylose (0.25%) and nano-cellulose (0.5%), with values of 98.90 N·m/g, 2343.67 mN·m2/g, 1162 kpa·m2/g and 8.33, respectively. The percentage of brightness ranged from 49.7% (strips treated with KOH 2% + 100 mL NaClO) to 9.6% (strips treated with Eucalyptus camaldulensis bark extract 2%), while the percentage of darkness ranged from 99.86% (strips treated with Salix babylonica leaf extract 2% or E. camaldulensis bark extract 0.5%) to 67.26% (strips treated with NaOH (2%) + 100 mL NaClO). From the SEM examination, sheets produced from treated strips with extracts from P. rigida and E. camaldulensis or S. babylonica showed no growths of A. flavus and C. gloeosporioides. Additionally, other pre-treatments, such as Nano-cellulose+Tylose 0.5% (1:1 v/v) and Tylose 0.5%, were also found to have no growth of A. niger. In conclusion, strips pre-treated with nanomaterials and extracts were enhanced in terms of the technological and antifungal properties of produced Papyrus sheets, respectively.

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Section: Resultsmentioning

confidence: 99%

Assessment of the Impact of Different Treatments on the Technological and Antifungal Properties of Papyrus (Cyperus Papyrus L.) Sheets

et al. 2019

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“…The later contains upper layer of wood pulp. Mineral pigments such as caco 3 , titanium oxide and kaolin were applied to coat one surface of paperboard having 280g/m 2 .These pigments are functional fillers that impart specific properties to paper and satisfy the requirements of reducing the cost of production. Coating enhances mechanical properties of coated paperboard along machine direction and cross direction.…”

Section: Paperboard Coatingmentioning

confidence: 99%

“…Pulp made from straw is best suited for corrugated medium, newsprint, printing and writing papers, and linerboard. Usually paper products are not made from 100% straw pulp, but are mixed with recycled or wood pulps, [3] and could be mixed with other non-woods. Acetic acid, like most of the organic chemicals [4]used to produce pulp, was originally used to isolate lignin from wood [5,6].…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of local manufactured paperboard

2017

Egypt. J. Chem.

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“…Despite the wide variety of cellulose fibers from different origins, it is very important that the fiber selected for production provides paper of the required quality. Therefore, many researchers have blended fiber pulp to achieve the desired properties of paper (Tripathi et al, 2013;Nassar et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of Photo-oxidation on the Properties of Hemp Office Papers

Plazonić¹,

Džimbeg-Malčić²,

Bates³

et al. 2020

IJTech

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This research observes changes in the properties of commercially available hemp office papers exposed to photo-oxidation for artificial aging. In order to accelerate the changes that naturally occur in paper, photo-oxidation was performed using a Xenon light source. The electromagnetic radiation was administered in doses of 550 W/m 2 over 24 hours with a temperature of 60°C. Three types of hemp office papers that differ in chemical composition and manufacturing process were used as samples. The strength properties (tensile index, elongation at break, tear index), surface properties (Bendtsen roughness, Bekk smoothness), pH of paper extracts, and optical properties were observed. The listed properties of artificially aged samples were compared to those of unaged commercial paper samples. The results show that, after only 24 hours, accelerated aging with a Xenon arc lamp affects all observed paper properties. For all analyzed office papers, the values of the tensile index, Bekk smoothness, and pH of paper extracts decreased, while the values of elongation break, tear index, and Bendtsen roughness increased due accelerated aging. Regarding the CIE L*a*b* color space value, lightness (L*) generally decreased after the aging treatment, and all paper samples became less reddish (a* decreased) and more yellow (b* increased). The obtained results of this research reveal that pulp with hemp fibers can produce higher-quality office paper that is more stable against light and temperature influences than those made with post-consumer fibers. However, to increase the durability of manufactured paper, hemp fibers must be bleached.

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An Optimum Mixture of Virgin Rice Straw Pulp and Recycled Old Newsprint Pulp and their Antimicrobial Activity

Cited by 9 publications

References 0 publications

Assessment of the Impact of Different Treatments on the Technological and Antifungal Properties of Papyrus (Cyperus Papyrus L.) Sheets

Assessment of the Impact of Different Treatments on the Technological and Antifungal Properties of Papyrus (Cyperus Papyrus L.) Sheets

Improving the performance of local manufactured paperboard

Effects of Photo-oxidation on the Properties of Hemp Office Papers

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