Influence of catalyst in the synthesis of a cellulose-based sensor: Kinetic study of 3-glycidoxypropyltrimethoxysilane epoxy ring opening by Lewis acid

Guido, Emanuela; Colleoni, Claudio; Clerck, Karen De; Plutino, Maria Rosaria; Rosace, Giuseppe

doi:10.1016/j.snb.2014.06.126

Cited by 49 publications

(42 citation statements)

References 28 publications

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“…The goals of this investigation are to examine the synergistic effects of silica (SiO 2 ) and zinc oxide (ZnO) on the flame retardant properties of cotton and polyester-cotton (PC) fabrics through the sol-gel process, since inorganic metallic ions (silica, zinc oxide, alumina, and zirconia) have more stability than organic metals that also incorporate readily with cellulosic fibers and their blends (like PC) [41]. SiO 2 has the highest water content and therefore reduces burning kinetics and smoke production [42], while ZnO (a photocatalyst) promotes the formation of a char layer to enhance the flame retardant action [43]. Many attributes, such as UV resistance, antibacterial activity, and outstanding hydrophobicity, have been investigated; however, fire-retardant properties through silica and zinc oxide nanoparticles are still very limited.…”

Section: Introductionmentioning

confidence: 99%

Surface Functionalization of Cotton and PC Fabrics Using SiO2 and ZnO Nanoparticles for Durable Flame Retardant Properties

et al. 2020

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In recent years, the use of functional textiles has attained attention due to their advantageous health and safety issues. Therefore, this study investigated the flame retardancy on cotton (COT) and polyester-cotton (PC) fabrics treated with different concentrations of silica and zinc nanoparticles through a sol-gel finishing technique. FTIR, SEM, and TGA were conducted for the characterization of coated fabric samples. The FTIR and SEM of Pristine and Treated Cotton and PC fabrics illustrated that the SiO2 (silica dioxide) and ZnO (Zinc oxide) nanoparticles were homogeneously attached to the fiber surface, which contributed to the enhancement of the thermal stability. The starting thermal degradation improved from 320 to 350 °C and maximum degradation was observed from 400 to 428 °C for the COT-2 cotton substrate. However, the initial thermal degradation improved from 310 to 319 °C and the highest degradation from 500 to 524 °C for the PC substrate PC-2. The outcomes revealed that the silica has a greater influence on the thermal properties of COT and PC fabric samples. Additionally, the tensile strength and flexural rigidity of the treated samples were improved with an insignificant decrease in air permeability.

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Section: Introductionmentioning

confidence: 99%

Surface Functionalization of Cotton and PC Fabrics Using SiO2 and ZnO Nanoparticles for Durable Flame Retardant Properties

et al. 2020

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“…The NY dye modified by a glycidyl methacrylate group (GMA-NY) was synthesized by following an optimized sol-gel reaction described in previous works (Guido et al, 2014;Caldara et al, 2016). Briefly, the glycidyl methacrylate (GMA) molecule was linked to the NY dye by ring opening of GMA in acidic conditions (water solution of the Lewis acid boron trifluoride diethyl etherate BF 3 OEt 2 ).…”

Section: Methodsmentioning

confidence: 99%

“…Subsequently, buffer solutions of different pH ranging between 2 and 10 were added to the UV-irradiated GMA-NY solution: a clear color change from yellow to blue, distinctly visible by naked eye, was observed, in accordance with NY halochromic properties (Guido et al, 2014). UV-vis spectroscopy was also used to better monitor the dye activity.…”

Section: Photo-grafting Processmentioning

confidence: 99%

“…Thanks to its interesting application in several biological and diagnostic fields, NY as a halochromic molecule, has been used in the development of smart textiles. In a previous investigation (Guido et al, 2014), NY was immobilized onto cotton fabrics by the sol-gel technique, with the aim of developing wearable pH-meter textile. The authors demonstrated the covalent functionalization of the NY molecules using 3glycidoxypropyltrimethoxysilane precursor (GPTMS) through the catalyzed epoxy ring-opening by BF 3 OEt 2 .…”

Section: Introductionmentioning

confidence: 99%

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Surface Functionalization of Cotton Fabrics by Photo-Grafting for pH Sensing Applications

et al. 2020

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This paper investigates the photo-grafting of a halochromic molecule on cotton fabric surfaces. Nitrazine yellow (NY) dye was modified with a methacrylate moiety (GMA) obtaining a photo-reactive dye (GMA-NY), which was covalently grafted onto the cellulosic substrate by means of UV irradiation. The photo-grafting reaction was studied by FT-IR spectroscopy, while the pH response of the functionalized fabric was evaluated at different pH conditions (i.e., acidic and alkaline conditions) both in wet and vapor environments by spectrophotometric analyses. The results showed that the photografting of the modified dye onto the fabric was successful: treated cotton clearly changed color when subjected to different pH. It was thus demonstrated that the GMA-NY dye, photo-grafted on cotton, can successfully impart pH sensing properties to the fabric, which can therefore find numerous applications in the area of smart textiles.

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“…In our previous studies, we have already shown that nano-hybrid sol-gel-based coatings feature abrasion resistance, tensile strength and elongation properties of the treated fabrics [13,14]. These peculiar characteristics may be combined with a proper doping molecule, such as a dye [15][16][17][18][19][20][21], an antimicrobial [22], a hydrophobic [23][24][25] or a flame-resistant molecule [26,27], with the aim of improving the textile surface properties and making a functional nano-hybrid coating.…”

Section: Introductionmentioning

confidence: 99%

Sol–Gel Treatment of Textiles for the Entrapping of an Antioxidant/Anti-Inflammatory Molecule: Functional Coating Morphological Characterization and Drug Release Evaluation

et al. 2020

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The growing interest towards textile-based drug delivery systems is due to their potential innovative medical and well-being applications. In recent years, the technique of encapsulation or inclusion of the medicine/active principle into a polymer functional matrix has been employed in order to obtain textile materials with controlled drug release. In this study, a sol–gel-based coating was developed and used as an entrapping polymeric cross-linked network for a N-Palmitoyl-ethanolamine (PEA) derivative, 2-methyl-pentadecanoic acid (4-nitro-phenyl)-amide or N-Palmitoyl-(4-nitro-phenyl)-amine (PNPA), whose anti-inflammatory and antioxidant properties have already been shown. A wide series of chemical-physical methods have been used to characterize the silica-based functional sol and to ascertain the efficient and temporary deposit of PNPA on the sol–gel coated cotton fabrics. The medicine release system achieved was shown to ensure biocompatibility, PNPA reservoir and its subsequent releasing under the action of cutaneous stimuli, thus providing useful insights in the design of medical textiles.

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Influence of catalyst in the synthesis of a cellulose-based sensor: Kinetic study of 3-glycidoxypropyltrimethoxysilane epoxy ring opening by Lewis acid

Cited by 49 publications

References 28 publications

Surface Functionalization of Cotton and PC Fabrics Using SiO2 and ZnO Nanoparticles for Durable Flame Retardant Properties

Surface Functionalization of Cotton and PC Fabrics Using SiO2 and ZnO Nanoparticles for Durable Flame Retardant Properties

Surface Functionalization of Cotton Fabrics by Photo-Grafting for pH Sensing Applications

Sol–Gel Treatment of Textiles for the Entrapping of an Antioxidant/Anti-Inflammatory Molecule: Functional Coating Morphological Characterization and Drug Release Evaluation

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