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<p>Super-hydrophobic textiles are highly demanded for self-cleaning, phase separation, and membrane processes. The native cellulose (cotton) fabric has been treated with a hydrophobic fluoropolymer finish along with titania nanoparticles (TNPs) under the pad-dry-cure approach. The test cellulose fabrics were characterized for textile, analytical, physicochemical, UV protection, and antibacterial properties. FTIR results demonstrate successful application of TNP/fluoropolymer finish on the fabric. The tensile strength of the untreated cellulose fabric (299 N) was improved to 447 N on treatment with TNP/fluoropolymer finish; the respective samples expressed elongation at the break of 9.1 and 9.28%. The control cellulose fabric exhibited an air permeability of 108 mm/s, which was limited to 90–102&#xa0;mm/s after TNP inclusion during polymeric finishing. The native cellulose expressed a crystallinity index of 86.1%, which was reduced to 77.8% after treatment with a TNP-mediated fluoropolymer finish, which might be due to&#xa0;amorphous nature of the polymeric finish. The untreated fabric was smooth, whereas the TNP-mediated fluoropolymer-treated fabric had a roughened surface morphology. Citric acid inclusion improved the dispersibility of nano-finish on the fabric surface to regulate multifunctional attributes. The native cellulose fabric remained highly hydrophilic; the fluoropolymer finished fabric expressed the water contact angle (WCA) of 149.4°, and with TNP-incorporated finishing, a superhydrophobicity (WCA = 172.5°) was observed. The TNP inclusion reduced the concentration dependency on the fluoropolymer finish to make the process sustainable. The treated fabric showed good surface self-cleanliness against a model organic dye and remained stable against a sulfuric acid solution. The cellulose matrix could offer controlled shapes, porosity, and amphiphilicity for effective phase separation, i.e., the <i>n</i>-hexane phase from the aqueous media. The resultant fluoropolymer cum TNP-treated cellulose fabric could find possible uses in diverse environments where hydrophobicity, self-cleanliness, UV-protections, and antibacterial performances are desirable.</p>

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Titania-based organometallic super-hydrophobic finishing of cellulose fabric for potential organic/aqueous phase separation application

  • 期刊论文

  • 发表日期：

    2025年9月8日

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  • Ali Rehman Jafri,
  • Zulfiqar Ali Raza,
  • Amina Khan,
  • Tanzeel Sarwar

摘要

Super-hydrophobic textiles are highly demanded for self-cleaning, phase separation, and membrane processes. The native cellulose (cotton) fabric has been treated with a hydrophobic fluoropolymer finish along with titania nanoparticles (TNPs) under the pad-dry-cure approach. The test cellulose fabrics were characterized for textile, analytical, physicochemical, UV protection, and antibacterial properties. FTIR results demonstrate successful application of TNP/fluoropolymer finish on the fabric. The tensile strength of the untreated cellulose fabric (299 N) was improved to 447 N on treatment with TNP/fluoropolymer finish; the respective samples expressed elongation at the break of 9.1 and 9.28%. The control cellulose fabric exhibited an air permeability of 108 mm/s, which was limited to 90–102 mm/s after TNP inclusion during polymeric finishing. The native cellulose expressed a crystallinity index of 86.1%, which was reduced to 77.8% after treatment with a TNP-mediated fluoropolymer finish, which might be due to amorphous nature of the polymeric finish. The untreated fabric was smooth, whereas the TNP-mediated fluoropolymer-treated fabric had a roughened surface morphology. Citric acid inclusion improved the dispersibility of nano-finish on the fabric surface to regulate multifunctional attributes. The native cellulose fabric remained highly hydrophilic; the fluoropolymer finished fabric expressed the water contact angle (WCA) of 149.4°, and with TNP-incorporated finishing, a superhydrophobicity (WCA = 172.5°) was observed. The TNP inclusion reduced the concentration dependency on the fluoropolymer finish to make the process sustainable. The treated fabric showed good surface self-cleanliness against a model organic dye and remained stable against a sulfuric acid solution. The cellulose matrix could offer controlled shapes, porosity, and amphiphilicity for effective phase separation, i.e., the n-hexane phase from the aqueous media. The resultant fluoropolymer cum TNP-treated cellulose fabric could find possible uses in diverse environments where hydrophobicity, self-cleanliness, UV-protections, and antibacterial performances are desirable.