Use of Radiation-Synthesized Tetrafluoroethylene Telomers with Silane End Groups for Hydrophobization of Polyester Fabric

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

doi:10.1134/s0018143920020095

Cited by 8 publications

(6 citation statements)

References 14 publications

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“…In this work, we applied TFE telomers synthesized in acetone (TFE/AC), butyl chloride (TFE/BC) and trimethylchlorosilane (TFE/TMCS). Their synthesis procedure and properties are described in detail in works [35][36][37][38][39][40].…”

Section: Methodsmentioning

confidence: 99%

“…Changing the synthesis parameters (telogen, monomer concentration, and radiation dose) makes it possible to obtain telomers with the chain length from several units to hundreds of units [20,29,30]. Works [11,18,20,[30][31][32][33][34][35][36][37] show that tetrafluoroethylene telomers synthesized and dissolved in acetone, butyl chloride and trimethylchlorosilane with the chain length of 20-30 monomer units possess a combination of film-forming properties, good adhesion and high thermal stability. These properties of the telomers make them promising water-repellents for fibrous materials.…”

Section: Introductionmentioning

confidence: 99%

“…Radiation-induced telomerization of TFE in solvents leads to the formation of telomers with the common formula R 1 -(TFE) n -R 2 , where n is the chain length, R 1 and R 2 are the end groups representing solvent molecule fragments. When telomers are synthesized in acetone (C 3 H 6 O), the end groups can be H, CH 3 , COCH 3 and CH 2 COCH 3 [38,39], in butyl chloride (CH 3 (CH 2 ) 3 Cl)-H, Cl, and C 4 H 8 Cl [35,40] and in trimethylchlorosilane (C 3 H 9 ClSi)-Cl, -(CH 3 ) 2 ClSi and -(CH 3 ) 3 Si [11,37]. UPTFE FORUM ® does not have such end groups.…”

Section: Introductionmentioning

confidence: 99%

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Wear-Resistant Hydrophobic Coatings from Low Molecular Weight Polytetrafluoroethylene Formed on a Polyester Fabric

2022

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The paper presents a comparative analysis of the surface structure and morphology of hydrophobic coatings formed on a polyester fabric from various types of low molecular weight tetrafluoroethylenes by a new method. The low molecular weight compounds used include: ultrafine polytetrafluoroethylene of the FORUM® trademark prepared through thermo-gas-dynamic decomposition of industrial polytetrafluoroethylene waste, and tetrafluoroethylene telomers, synthesized by radiation-chemical initiation from fluoromonomers in acetone, butyl chloride and trimethylchlorosilane solutions. The formation of coatings consists in deposition of low molecular weight tetrafluoroethylenes from solutions in supercritical carbon dioxide and organic solvents. The contact angle and water absorption of the polyester fabric with coatings containing the specified water-repellents are determined. The resistance of the achieved effect to various types of wear—washing, dry cleaning and abrasionis evaluated. The hydrophobic properties of the fabric are found to be affected by the coating plasticity characterized by the stiffness coefficient. The importance of this indicator to targeted changes in fabric properties is proved. All the considered types of low molecular weight polytetrafluoroethylene (PTFE) are shown to be effective water-repellents for the polyester fabric.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wear-Resistant Hydrophobic Coatings from Low Molecular Weight Polytetrafluoroethylene Formed on a Polyester Fabric

2022

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“…When applied from solutions, some of these oligomers are capable of forming coatings on the surface of filaments with properties similar to those of polytetrafluoroethylene [220,221]. Fluorinated oligomers, obtained either by thermal degradation of fluoropolymers [207,[222][223][224][225][226][227] or by synthesis from fluoromonomers [3,207,211,221,[228][229][230][231][232], are the basis of such coatings. The use of organosilicon compounds as hydrophobizers also significantly reduces the surface energy of fibrous materials [233][234][235][236].…”

Section: Hydrophobic Propertiesmentioning

confidence: 99%

“…In this case, the coating will reflect the microrelief of the fibrous substrate, acquiring a similar roughness. In [207,[222][223][224][225][226][227][228][229][230][231][232]263,264], such coatings characterized by high water contact angles were formed from solutions of fluorine-containing hydrophobizer in organic solvents and supercritical carbon dioxide; in [265] by plasma spraying, in [266] by combining electric spinning with chemical vapor deposition of the coating, in [239] by chemical etching, and in [267] by electrochemical deposition. As shown in [222][223][224][225][226][227][228][229][230][231][232]268], the degree of hydrophobicity achieved can be further increased by using the methods of preliminary activation of fibrous materials, which increase the roughness.…”

Section: Hydrophobic Propertiesmentioning

confidence: 99%

Giving Improved and New Properties to Fibrous Materials by Surface Modification

et al. 2023

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This review summarizes the results of research published in recent decades on the main directions in the functionalization of fibrous materials using surface modification. Methods for thepreliminary activation of the surface of fibrous materials are described, allowing increasing the adhesion of modifiers. The features of the formation of functionalizing coatings on fibrous materials in comparison with other substrates are analyzed. Some specific methods for evaluating the effectiveness of the surface modification inherent in fibrous materials are considered. Particular attention is paid to giving fibrous materials antimicrobial properties, photoactivity, the ability to protect against ultraviolet radiation, and hydrophobicity.

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Structural Design of Multifunctional PET Non‐woven Fabric with Porous Dual‐Network for Infrared Stealth, Flame Retardant, and Electromagnetic Interference Shielding

Bai,

Feng,

Wang

et al. 2024

Adv Eng Mater

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With rapid advances in electronic and communication technology, electromagnetic interference and other problems are becoming increasingly prominent. Thus, electromagnetic interference shielding materials have recently garnered extensive attention. In this study, a multi‐walled carbon nanotube/polyurethane/non‐woven electromagnetic shielding material (CPNW) is developed using impregnation and nonsolvent‐induced‐phase separation techniques. Utilizing a three‐dimensional nonwoven network as the substrate, the “nonwoven fabric‐polyurethane‐carbon nanotube” composite is impregnated and cured via the non‐solvent‐induced‐phase separation method, resulting in a distinctive porous dual‐network structure that ensures robust interfacial bonding between carbon nanotubes, nonwoven fabric, and polyurethane. At a carbon nanotube content of 10% (based on the mass of nonwoven fabric), CPNW exhibited an electromagnetic interference shielding effectiveness of 28.8 dB, a thermal conductivity of 0.127 W m−1 K−1, and a burning time of 1 min and 15 s, demonstrating outstanding electromagnetic shielding, flame retardant, and infrared stealth capabilities. Overall, this study laid a theoretical groundwork for the development of multifunctional non‐woven electromagnetic shielding materials with widespread application potential in aerospace, military, artificial intelligence, and wearable electronics.

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Use of Radiation-Synthesized Tetrafluoroethylene Telomers with Silane End Groups for Hydrophobization of Polyester Fabric

Cited by 8 publications

References 14 publications

Wear-Resistant Hydrophobic Coatings from Low Molecular Weight Polytetrafluoroethylene Formed on a Polyester Fabric

Wear-Resistant Hydrophobic Coatings from Low Molecular Weight Polytetrafluoroethylene Formed on a Polyester Fabric

Giving Improved and New Properties to Fibrous Materials by Surface Modification

Structural Design of Multifunctional PET Non‐woven Fabric with Porous Dual‐Network for Infrared Stealth, Flame Retardant, and Electromagnetic Interference Shielding

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