Organofunctional Trialkoxysilane Sol-Gel Precursors for Chemical Modification of Textile Fibres

Vasiljević, Jelena; Tomšič, Brigita; Jerman, Ivan; Simončić, Barbara

doi:10.14502/tekstilec2017.60.198-213

Cited by 8 publications

(4 citation statements)

References 82 publications

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“…Functional silanes are characterized by a general chemical structure R′n-Si(OR) 4-n , where the R′ groups are the alkyl or organo-functional groups, and the R fragments are mainly the methyl, propyl, or butyl groups. In particular, the hydrolyzable and polymerizable R groups are involved in the realization of the well-oriented 3D network structure together with the extra functional groups, such as the epoxy, vinyl, or methacryloxy groups [ 220 , 221 , 222 ], which are in charge of grafting with the fibrous substrate [ 223 ]. As shown in Figure 10 , silane alkoxide precursors undergo hydrolysis in water, catalyzed either by acids or bases, and then parallel condensation reactions take place, leading to the network formation bearing the Si–O–Si bonds.…”

Section: Smart Materials Applications In Healthcare Technologymentioning

confidence: 99%

A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective

et al. 2022

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In recent years thanks to the Internet of Things (IoT), the demand for the development of miniaturized and wearable sensors has skyrocketed. Among them, novel sensors for wearable medical devices are mostly needed. The aim of this review is to summarize the advancements in this field from current points of view, focusing on sensors embedded into textile fabrics. Indeed, they are portable, lightweight, and the best candidates for monitoring biometric parameters. The possibility of integrating chemical sensors into textiles has opened new markets in smart clothing. Many examples of these systems are represented by color-changing materials due to their capability of altering optical properties, including absorption, reflectance, and scattering, in response to different external stimuli (temperature, humidity, pH, or chemicals). With the goal of smart health monitoring, nanosized sol–gel precursors, bringing coupling agents into their chemical structure, were used to modify halochromic dyestuffs, both minimizing leaching from the treated surfaces and increasing photostability for the development of stimuli-responsive sensors. The literature about the sensing properties of functionalized halochromic azo dyestuffs applied to textile fabrics is reviewed to understand their potential for achieving remote monitoring of health parameters. Finally, challenges and future perspectives are discussed to envisage the developed strategies for the next generation of functionalized halochromic dyestuffs with biocompatible and real-time stimuli-responsive capabilities.

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Section: Smart Materials Applications In Healthcare Technologymentioning

confidence: 99%

A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective

et al. 2022

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“…Th is phenomenon is probably the same for the application of a negatively charged reactive dye on cationised cotton textiles. In addition to the infl uence of dyeing properties, quaternary ammonium containing cationic compounds are oft en mentioned for their antibacterial eff ects on textile substrates [11][12][13][14][15]. A special type of antibacterial active quaternary ammonium compounds is based on the cationically modifi ed nitrogen component DABCO (1,4-Diazabicyclo(2.2.2)octan), which is a cyclic nitrogen compound [16].…”

Section: Izvlečekmentioning

confidence: 99%

Cationic Pretreatment for Reactive Dyeing of Cotton and its Simultaneous Antibacterial Functionalisation

Hanbing¹,

Haase²,

Mahltig³

2020

TEK

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Reactive dyes are chemically bonded to a cotton fi bre surface. The anchor groups of dye molecules initiate this covalent bonding. In addition to this anchor group, reactive dyes also contain charged functional groups that are often negatively charged sulphonate groups -SO 3 -. These negative groups are part of the dye to enable its solubility in water. In industrial applications, dyes are applied as part of a water-based dye bath. The aim of the presented study was to improve the dyeing of cotton through the cationic modifi cation of the textile, supporting an attraction to negatively charged dye molecules. In this way, the dye up-take and achieved colour depth should be improved. The current study was performed with a vinyl sulfone reactive dye. Three diff erent nitrogen containing cationic organic substances were used for cotton pretreatment. In addition to colour properties, the antibacterial properties of prepared textile samples were also studied because antibacterial properties are often related to compounds containing amino and ammonium groups. Finally, it was shown that the cationic pretreatment with two of the three studied agents increased the dye up-take of cotton fabric from the dye bath. At the same time, one cationic agent can introduce antibacterial properties to treat cotton fabrics against two diff erent types of bacteria: E. coli and S. warneri. The simultaneous application of a functional property during an optimised dyeing process was demonstrated in this case and can serve as an example for further applications.

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“…In the case of TiO 2 -SiO 2 modified Co, slightly thicker coatings with higher nanoparticle content could be observed over complete fibers' surfaces as compared to the Co/PES. This is presumably on account of free hydroxyl groups on Co surface, which could interact with silanol groups of core-shell nanoparticles, forming covalent bonds, and thus, ensuring a strong adhesion between the coatings and the fiber surface [13]. On the other hand, PES fibers do not possess hydroxyl groups on the surface, therefore, only a weak physical adhesion occurs between the PES surface and nanoparticles, causing impaired adhesion of the coating.…”

Section: Fabric Surface Morphologymentioning

confidence: 99%

Washing Durability and Photo-Stability of NanoTiO2-SiO2 Coatings Exhausted onto Cotton and Cotton/Polyester Fabrics

Ojstršek

Fakin

2019

Coatings

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The purpose of this study was to assess and compare the durability of TiO2-SiO2 coatings applied in three concentrations onto two lightweight cellulose-based fabrics diverse in the composition against two external factors, repeated washings and prolonged intensive UV irradiation, by observing the changes in surface morphology, investigation of optical properties, and identification of specific molecular vibrations. The scanning electron microscopy (SEM) micrographs, diffuse reflectance spectroscopy (DRS) profiles and fourier transform-infrared (FT-IR) spectra implied equal distribution of TiO2-SiO2 nanoparticles over the surfaces of both fabrics after exhaustion procedures, regarding the concentration of colloidal paste and the type of material used, followed by a slight reduction of nanoparticles after twenty washing cycles. Moreover, the newly gained, good to very good UV protective functionality proved the suitability of the employed procedure and the sufficient durability of the selected coatings. Additionally, UV irradiation mainly caused damages to the cotton. Cotton/polyester became yellower under UV, although the application of TiO2-SiO2 protected the material against yellowness.

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Organofunctional Trialkoxysilane Sol-Gel Precursors for Chemical Modification of Textile Fibres

Cited by 8 publications

References 82 publications

A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective

A Review of Stimuli-Responsive Smart Materials for Wearable Technology in Healthcare: Retrospective, Perspective, and Prospective

Cationic Pretreatment for Reactive Dyeing of Cotton and its Simultaneous Antibacterial Functionalisation

Washing Durability and Photo-Stability of NanoTiO2-SiO2 Coatings Exhausted onto Cotton and Cotton/Polyester Fabrics

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