Sol–gel coating processing optimization for natural fibres

Zelča, Zane; Vihodceva, Svetlana; Kukle, Silvija

doi:10.3176/proc.2017.4.25

Cited by 5 publications

(6 citation statements)

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“…Rīgas Tehniskās universitātes Dizaina tehnoloģiju institūta darbinieki kopš 2011. g. ir mēģinājuši modificēt kokvilnas audumu ar Zn un Si saturošiem savienojumiem [38]- [45]. Izmantojot sola-gēla tehnoloģiju, apstrādāja kokvilnas audums, galvenokārt ar cinka acetāta dihidrātu (divās publikācijās arī ar cinka sultātu [39], [40]) un tetraetoksisilānu.…”

Section: Pašattīrošu Audumu Izveide Latvijāunclassified

“…Taču, nevienā no publikācijām nav apskatīta fotokatalītiskā aktivitāte, kas varētu piemist audumiem, pateicoties iespējamajai ZnO klātbūtnei, kā arī nav pieejami rentgenstaru difrakcijas dati, kas parādītu uz šķiedru virsmas iegūtā pārklājuma mineraloģisko sastāvu. Lai gan tiek uzsvērts, ka iegūti ZnO nanodaļiņu pārklājumi, nav rezultātu, kas pierādītu ZnO nanodaļiņu klātbūtni [38][39][40][41][42][43][44][45]. Visos pieejamajos darbos tika izmantota viena sola-gēla sintēzes shēma, kas balstās uz tetraetoksisilāna hidrolīzi spirta šķīdumos.…”

Section: Pašattīrošu Audumu Izveide Latvijāunclassified

“…Vēl jāatzīmē nesen publicēts darbs, kas veltīts kokvilnas un linu šķiedru modifikācijai [45]. Šī raksta autori nepiekrīt apgalvojumam, ka skenējošās elektronu mikroskopijas (SEM) rezultāti liecina par pārklāto šķiedru nanolīmeņa raupjainību.…”

Section: Pašattīrošu Audumu Izveide Latvijāunclassified

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Pašattīroši audumi: kas tie ir un kāpēc tādi nepieciešami?

Eglı̅tis

Mežinskis

Buiķe

2018

SJ MSAC

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Pašattīroši audumi ir tekstilmateriāli, kuriem piemīt spēja ārēju vides faktoru iedarbībā atbrīvot savu virsmu no dažādiem piesārņojumiem. Šādi audumi ļauj samazināt ūdens un enerģijas patēriņu, kas saistīts ar drēbju mazgāšanu, samazināt infekciju risku, pateicoties to biocīdām īpašībām, kā arī pasargā cilvēkus no UV starojuma. Papildus tam šādus audumus arī būtu grūtāk saslapināt; tas mūsdienu mitrajā klimatā samazinātu diskomfortu no salijušām drēbēm. Šādus efektus pašattīroši audumi iegūtu ar tādiem mehānismiem kā fotokatalīze un superhidrofobitāte. Lai audumi iegūtu augstāk minētās īpašības, piemērotākie ir ZnO un TiO2 nanodaļiņu veidotie pārklājumi. Savukārt pārklājumu ieguvei jāizmanto sola-gēla metode, kas sniedz iespēju izveidot homogēnus pārklājumus pie temperatūrām, kuras iztur organiskas dabas materiāli. Kopš 2011. gada ar šādu audumu izstrādi ir nodarbojies Rīgas Tehniskās universitātes Dizaina tehnoloģiju institūts. Kopš 2016. gada ar šādiem pārklājumiem nodarbojas arī Rīgas Tehniskās universitātes Silikātu materiālu institūtā. Izmantojot savas gadu desmitu laikā iegūtās zināšanas sola-gēla tehnoloģijā un nanostrukturētu pārklājumu ieguvē, sekmīgi uzsākti pētījumi rūpnieciski izmantojamu tehnoloģiju izstrādei kokvilnas audumiem.Self-Cleaning Fabrics: What Are They and How Are They Used?Self-cleaning fabrics are textile materials, which under the influence of various external environmental factors have the ability to rid their surface from various contaminants. Such fabrics make it possible to reduce water and energy consumption associated with washing clothes, to reduce the risk of infections due to their biocidal properties, and to protect people from UV radiation. In addition, such fabrics would also be more difficult to wet. This would reduce the possibility of wet clothes in damp climates. Such effects by self-cleaning fabrics could be achieved through mechanisms of photocatalysis and superhydrophobicity. To develop textiles with above mentioned properties, the most suitable approach is the deposition of coatings formed by ZnO and TiO2 nanoparticles. In turn, the sol-gel method should be used to obtain coatings. This would make it possible to create homogeneous coatings at temperatures that organic materials can withstand. Institute of Design Technologies, Riga Technical University, has been working on the development of such fabrics since 2011. The research in the field of such coatings at the Institute of Silicate Materials, Riga Technical University, has been performed since 2016. Thanks to decades long research in sol-gel technology and nanostructured coatings, the development of commercially available technologies for cotton fabrics has been successfully launched at the Institute of Silicate Materials.Keywords: self-cleaning fabrics, sol-gel method, TiO2, ZnO

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Section: Pašattīrošu Audumu Izveide Latvijāunclassified

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Pašattīroši audumi: kas tie ir un kāpēc tādi nepieciešami?

Eglı̅tis

Mežinskis

Buiķe

2018

SJ MSAC

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“…This means that giving the product certain additional functionalities during the final finishing, the coating can be applied on a multi-fibre knitted fabric. So far, many studies have focused on the cotton woven and knitted fabrics modification by applying sol-gel technology, 2,[6][7][8] including those carried out by authors, 9,10 but so far little attention has been paid to the modification of mixed fibre fabrics.…”

Section: Introductionmentioning

confidence: 99%

Surface characteristics of sol-gel treated single jersey plated socks

Bake

Kukle

Beļakova

2021

Journal of Engineered Fibers and Fabrics

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This study examines properties of the cotton/polyamide plain plated commercial socks (CO 81%/PA 19%) and pure polyamide fabric subjected to the multifunctional treatment by a sol-gel coating technique where tetraethyl-orthosilicate (TEOS) and zinc acetate dihydrate (ZAD) were used as precursors. Commercially available sock is produced on a single cylinder sock knitting machine which results in two surfaces (cotton and polyamide), with dissimilar characteristics thus leading to necessity of their separate studies. Experimental part examines surface structural clarification and compound identification using infrared spectroscopy. To assess the impact of modification such properties as air permeability must be tested and analysed. Pilot tests of antibacterial activity against Bacillus subtilis mscL 1141 and Staphylococcus aureus mscL 334 where carried out. Due to the modification consolidation treatment temperature below the destruction of material and the chemical compounds vibrational modes overlap, but in regions 1170–1650 cm−1 and 3200–3395 cm−1 show the presence of bounds corresponding to sol-gel coating presence on the surface.

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“…In this study modification on pure cotton yarns in order to preserve synthetic and electronic components from high temperature treatments of sol gel processes was carried out. The modification is more predictable, due to extensive research on cotton modification with sol gel technique [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Modification of Cotton Yarns for Smart Socks Production

Bake

Afanasjeva

Kukle

2019

KEM

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The functionality of textiles can be complimented by using a wide variety of modification technologies. This study focuses on textile modification with sol-gel technology as a part of smart sock prototype development. Zinc acetate dehydrate (ZAD) is integrated in sol synthesis and used as modifier thus improving modified cotton yarn mechanical properties and also can prolong time between washing, taking into account modifiers antimicrobial properties. Four hanks of pure cotton yarns with length of 300 m, where modified with silica-based sol with 7,5 wt% ZAD as a modifier. As a part of this study tensile strength and elongation of yarn was determined and changes in liner density were observed. Average yarn linear density increases by 19 % and linear density for knitted samples increases by 2,6 %. Therefore, yarn strength for 80 % of modified samples shows mean value of 2,32 N, that is 17 % higher than unmodified samples.

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Sol–gel coating processing optimization for natural fibres

Cited by 5 publications

References 0 publications

Pašattīroši audumi: kas tie ir un kāpēc tādi nepieciešami?

Pašattīroši audumi: kas tie ir un kāpēc tādi nepieciešami?

Surface characteristics of sol-gel treated single jersey plated socks

Modification of Cotton Yarns for Smart Socks Production

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