Coatings based on tetrafluoroethylene telomeres synthesized in trimethylchlorosilane for obtaining highly hydrophobic polyester fabrics

Prorokova, N. P.; Kumeeva, T. Yu.; Kiryukhin, D. P.; Kichigina, G. A.; Kushch, P. P.

doi:10.1016/j.porgcoat.2019.105485

Cited by 13 publications

(19 citation statements)

References 42 publications

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“…Thus, the cavitation process apparently has a partial reductive effect on NP and their subsequent incorporation within the substrate. Nevertheless, such bands are very weak, with Raman and FTIR signals for CuO-impregnated substrates being dominated by the substrate signal, although FTIR peaks at ∼1260 and ∼2960 cm –1 , respectively, were uniquely different to the polyester substrate and ascribed to a C–H bend and a symmetric O–H vibration, respectively. , Tauc estimated optical bandgap plots of PET-coated with CuO-NP compare relatively well with past reports of ∼1.35 eV . A reason for the discrepancy may be the presence of small amounts of Cu 2 O (expected Eg of ∼2.17 eV), which in turn cause the overall reading to be shifted. , Curiously, the greatest shifts are seen at the shortest deposition times, indicating greater relative Cu 2 O presence (not seen in preformed samples, but only after sonication-deposition), whereas longer periods of sonication result in a greater relative proportion of CuO.…”

Section: Resultssupporting

confidence: 78%

“…112 For long-lasting fabric water repellency, defectfree, conformal coatings on fibers of low surface energy are required. 28 Hydrophobic wetting states occur due to both (i) chemical composition (typically low surface energy constituents) and (ii) fractal hierarchical surface structures comprising variant micro-nano asperities, which confers greater stability for water−solid and water−air interfaces compared to nonhierarchical structures. 113 WCA of coated substrates was found to significantly and reliably increase after deposition, in comparison with pristine fabrics, i.e., from 0°to >140°, with an attendant improvement in sliding angle values, although none managed to reach below the 10°or less ideal (Figure 4).…”

Section: ■ Resultsmentioning

confidence: 99%

“…27 The discontinuous fabric surface offers favorable conditions for hydrophobization upon functionalization, compared to equivalent coatings on a flat surface. 28 However, PET fabrics (like all fabric structures) have high water absorbency as a result of capillary action via the pores that result from the interlacing fine filament fabric structures. Due to a lack of sealant in porous textile surfaces, with increased water pressure or prolonged contact time, water will eventually penetrate the material.…”

Section: ■ Introductionmentioning

confidence: 99%

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Sonochemical Routes to Superhydrophobic Soft Matter Coatings: Comparing Silica and Copper Oxide Coatings on Polyester Fabric

Ming

Chan

Mutalik

et al. 2022

Ind. Eng. Chem. Res.

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Reliable and long-lasting water repellency, ideally based on fluorine-free additives, is a desired utility in functional textiles, e.g., for outdoor active wear, workwear, and even protective medical garments. To date, such coating treatments have usually been accomplished by pad-dry-cure, electrolysis, or similar methods that tend to be time-consuming and often yield unsatisfactory coating results. In this study, hydrophobic-coated polyester substrates were prepared using a sonochemical coating process. Comparisons were made between the performances and associated morphological variations of amorphous nano-dimensional silica versus nanocrystalline cupric oxide hydrophobic coatings, which were separately made and successfully loaded, via a random distribution, onto mesoporous polyester-woven fabric substrates. Shorter sonication times seem to allow for retention of preformed morphologies into the subsequent coating patterns. The nanocomposite coatings and their components were characterized using X-ray diffraction (XRD), attenuated total reflectance-infrared Fourier transform infrared (ATR-FTIR), SEM, scanning electron microscope (SEM), UV–vis, dynamic light scattering (DLS), and Raman spectroscopy measurements. Almost all coatings displayed highly hydrophobic static water contact angle valuesfor CuO, these values further increased with time, a rarely reported aging effect thought due to the presence of mixed oxides that likely formed in the coating due to the spallative ultrasonic approach. In addition, the efficacy of these hydrophobic semipermeable fabrics to hexane–water mixture separations, with varying concentrations of Na2SO4, was found to be >99% for optimized membranes, with an associated permeation flux of ∼5.9 ± 2 L m–2 h–1, a water content of ∼0%, and a salt rejection capability of ∼94%. Thus, non-fluorine-containing sonochemical coating formulations and processes are ideal in the coating of soft matter, polymeric textiles.

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Section: Resultssupporting

confidence: 78%

Section: ■ Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Sonochemical Routes to Superhydrophobic Soft Matter Coatings: Comparing Silica and Copper Oxide Coatings on Polyester Fabric

Ming

Chan

Mutalik

et al. 2022

Ind. Eng. Chem. Res.

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“…In the last decade, the works about telomerization have been directed towards receiving the amphiphilic polymers [ 35 ] or block copolymers [ 36 ]. The latest scientific reports (2020) concern the preparation of fluorosurfactants [ 37 ], preparation of hydrophobic coatings [ 38 ] and pioneering studies on telomerization of chitosan and hemicellulose with butadiene in water [ 39 ]. Additionally, companies indicate that the telomerization process is particularly practical in industrial terms.…”

Section: Introductionmentioning

confidence: 99%

Influence of Acrylic Acid on Kinetics of UV-Induced Cotelomerization Process and Properties of Obtained Pressure-Sensitive Adhesives

et al. 2020

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A new environmentally friendly method of photoreactive pressure-sensitive adhesives (PSAs) preparation was demonstrated. PSAs based on n-butyl acrylate (BA), acrylic acid (AA) and 4-acryloyloxy benxophenone (ABP) were prepared via the UV-induced cotelomerization process in the presence of a radical photoinitiator (acylphosphine oxide) and telogen (tetrabromomethane). Hydroxyterminated polybutadiene was used as a crosslinking agent. Influence of AA concentration (0–10 wt %) on kinetics of the cotelomerization process was investigated using a photodifferential scanning calorimetry method, selected physicochemical features of obtained photoreactive BA/AA/ABP cotelomers (molecular masses, polydispersity, monomers conversion and dynamic viscosity) and self-adhesive properties of obtained PSAs (adhesion, tack and cohesion) were studied, as well. It turned out that AA content is the important factor that influences monomers conversion (thereby the volatile parts content in prepolymer) and PSAs’ properties. As the acrylic acid content increases, the reaction rate increases, but the total monomers conversion and the solid content of the prepolymer decreases. Additionally, the adhesion and cohesion of PSAs were grown up, and their tackiness decreased. However, the AA content has no effect on molecular weights (Mw and Mn) and polydispersity (c.a. 1.5) of photoreactive cotelomers. The optimal AA content necessary to obtain a prepolymer with low volatile parts content and good PSA properties was determined.

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“…[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Предложенные технологии не имеют пока аналогов в мировой практике и защищены рядом патентов [2,[24][25][26][27][28][29].…”

Section: Introductionunclassified

Фторполимерные Композиционные Материалы И Защитные Покрытия Для Экстремальных Условий Арктической Зоны

Кирюхин¹,

Kichigina²,

Кущ³

2020

РХЖ

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Рассмотрены особенности использования радиационно-синтезированных теломеров тетрафторэти-лена для создания новых фторполимерных композиционных материалов и защитных покрытий в экстремальных климатических условиях Арктики. Основное внимание уделено использованию теломеров для гидрофобизации высокопористых теплозащитных, теплоизоляционных материалов на основе кварцевых волокон марок ТКВ (тонкое кварцевое волокно) и ТЗМК-10 и стеклотканей.

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Coatings based on tetrafluoroethylene telomeres synthesized in trimethylchlorosilane for obtaining highly hydrophobic polyester fabrics

Cited by 13 publications

References 42 publications

Sonochemical Routes to Superhydrophobic Soft Matter Coatings: Comparing Silica and Copper Oxide Coatings on Polyester Fabric

Sonochemical Routes to Superhydrophobic Soft Matter Coatings: Comparing Silica and Copper Oxide Coatings on Polyester Fabric

Influence of Acrylic Acid on Kinetics of UV-Induced Cotelomerization Process and Properties of Obtained Pressure-Sensitive Adhesives

Фторполимерные Композиционные Материалы И Защитные Покрытия Для Экстремальных Условий Арктической Зоны

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