UV radiation induced flame retardant cellulose fiber by using polyvinylphosphonic acid/carbon nanotube composite coating

Gashti, Mazeyar Parvinzadeh; Almasian, Arash

doi:10.1016/j.compositesb.2012.07.052

Cited by 94 publications

(11 citation statements)

References 55 publications

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“…It seems that these interactions are strong enough to enable aggregation of nanoclay particles on the wool surface as a result of the high surface area. This phenomenon was observed in previous studies by the present authors, where nanoparticles were incorporated into organic coatings .…”

Section: Resultssupporting

confidence: 88%

Clay nanoadsorbent as an environmentally friendly substitute for mordants in the natural dyeing of carpet piles

Gashti

Katozian

Shaver

et al. 2013

Coloration Technology

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The aim of this work was to assess the possibility of using a bentonite‐type clay as a promising substitute for mordants in the natural dyeing of wool with madder. Wool yarn was treated with nanoclay by using three conventional methods of pretreatment (before dyeing), simultaneous dyeing with madder in the presence of clay, and aftertreatment (after dyeing). Madder was used as a natural source of colorant. The scientific methods employed in this study included Fourier Transform‐infrared spectroscopy, ultraviolet‐visible spectrophotometry, differential scanning calorimetry, thermogravimetric analysis, scanning electron microscopy, moisture regain measurement, tensile strength tests, reflectance spectrophotometry, and fastness evaluation. The intensity of the major peaks in the Fourier Transform‐infrared spectra of the nanoclay‐treated wool yarn indicated chemical changes in the polypeptide functional groups in the wool structure. Madder exhibited higher dyeing properties on clay‐pretreated samples compared with untreated wool. The results of colour measurements showed that the colour strength of the dyed samples improved with an increasing amount of clay in the pretreatment baths.

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Section: Resultssupporting

confidence: 88%

Clay nanoadsorbent as an environmentally friendly substitute for mordants in the natural dyeing of carpet piles

Gashti

Katozian

Shaver

et al. 2013

Coloration Technology

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“…groups onto outside surfaces of carbon nanotubes further diversifies their functions [15][16][17]. For these reasons, functionalized carbon nanotubes with enhanced dispersibility and interfacial interaction in polymers have been applied as group carriers to improve the performance of polymer matrixes [18][19][20].In this study, DOPO-functionalized multi-walled carbon nanotubes (MWCNT) were synthesized by grafting 10-(2,5-dihydroxyphenyl)-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (ODOPB) onto the outside surfaces of acylated MWCNT. The functionalized MWCNT was used as an additive together with nano-sized aluminum diethylphosphinate (AlPi) to form fire-resistant epoxy resin composites.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Preparation and Characterization of DOPO-Functionalized MWCNT and Its High Flame-Retardant Performance in Epoxy Nanocomposites

Qiu

et al. 2020

Polymers

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In this work, functionalized multi-walled carbon nanotubes (MWCNT) were synthesized by the reaction between acylated MWCNT and 10-(2,5-dihydroxyphenyl)-9,10-dihydro-9 -oxa-10-phosphaphenanthrene-10-oxide (ODOPB). The obtained MWCNT-ODOPB was well dispersed into epoxy resins together with aluminum diethylphosphinate (AlPi) to form flame-retardant nanocomposites. The epoxy resin nanocomposite with phosphorus content of 1.00 wt % met UL 94 V-0 rating, exhibited LOI value of 39.5, and had a higher T g compared to neat epoxy resin, which indicates its excellent flame retardant performance. These experimental results indicated that MWCNT-ODOPB was a compatible and efficient flame retardant for epoxy resins. Moreover, cone calorimeter analysis showed that the peak heat release rate (pHRR), total heat release (THR) values, and CO 2 production profiles of the composites decreased with an increase in the additional amount of phosphorus. groups onto outside surfaces of carbon nanotubes further diversifies their functions [15][16][17]. For these reasons, functionalized carbon nanotubes with enhanced dispersibility and interfacial interaction in polymers have been applied as group carriers to improve the performance of polymer matrixes [18][19][20].In this study, DOPO-functionalized multi-walled carbon nanotubes (MWCNT) were synthesized by grafting 10-(2,5-dihydroxyphenyl)-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (ODOPB) onto the outside surfaces of acylated MWCNT. The functionalized MWCNT was used as an additive together with nano-sized aluminum diethylphosphinate (AlPi) to form fire-resistant epoxy resin composites. The ER/AlPi/MWCNT-ODOPB nanocomposites with 1 wt % phosphorus content exhibited the best UL 94 rating (V-0) and an upgraded limiting oxygen index (LOI) value of 39.5. At the same time, the as-prepared composites also showed higher T g values than neat epoxy resin for a good interaction between epoxy chains and MWCNT-ODOPB. Besides, cone calorimeter tests (CCT) were used to study the fire hazards for MWCNT-ODOPB-modified epoxy resins. The results indicated a clear decrease in a peak heat release rate (pHHR) and a total release rate (TRR) with an increase in the phosphorus content. Furthermore, the CO 2 and CO production during related tests also exhibited the same trend.

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“…Today, UV radiation is the first choice for curing treatments because of its fast cure speed and the possibility of avoiding volatile organic compounds. Modified cellulose fiber systems that can be polymerized by UV radiation have been suggested for possible use in several fields, including hydrogels for contact lenses (Menashe 1986), general coating uses (Cook 1988;Cook and Simm 1998), and flame retardants in cotton fabrics (Gashti and Almasian 2013;. Acrylates, epoxides, and vinyl ethers are the most reactive functional groups during radiation treatment, and the backbone for irradiation crosslinking is preferably a polyester or polyether (Allen 1996).…”

Section: Introductionmentioning

confidence: 99%

UV Radiation of Cellulose Fibers and Acrylic Acid Modified Cellulose Fibers for Improved Stiffness in Paper

2015

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In this study, the strength and stiffness was measured on paper sheets with and without acryl ester functionalization grafted with UV-reactive molecules. Three different monomers with one, two, and three UV-reactive groups, respectively, were reacted with the unsaturated ester. The trifunctional monomer had the most influence on the strength properties of the three monomers and was added in concentrations of 5 to 20 wt% of paper (0.03-0.11 mol eq./AGU). The strength and stiffness properties were measured with tensile tests. An increase in elongation, tensile index, and Young's modulus was seen after irradiation. However, the paper sheets esterified with acrylic acid prior to radiation showed no improvement in stiffness compared to a non-treated paper. As a result, the esterification with acrylic acid to enhance the grafting effect did not have the ability to compensate for the loss in strength caused by the esterification treatment.

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UV radiation induced flame retardant cellulose fiber by using polyvinylphosphonic acid/carbon nanotube composite coating

Cited by 94 publications

References 55 publications

Clay nanoadsorbent as an environmentally friendly substitute for mordants in the natural dyeing of carpet piles

Clay nanoadsorbent as an environmentally friendly substitute for mordants in the natural dyeing of carpet piles

Preparation and Characterization of DOPO-Functionalized MWCNT and Its High Flame-Retardant Performance in Epoxy Nanocomposites

UV Radiation of Cellulose Fibers and Acrylic Acid Modified Cellulose Fibers for Improved Stiffness in Paper

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