Polyvinylamine‐coated polyester fibers as a carrier matrix for the immobilization of peroxidases

Abstract

Polyvinylamine-coated polyester fibers as a carrier matrix for the immobilization of peroxidasesBiocatalytic transformations that employ immobilized enzymes become increasingly important for industrial applications. Synthetic or natural textile fiber materials such as polyester, polyamide or viscose are support materials that are comparatively inexpensive. Contrary to traditional support materials, their flexibility enables their use in reactors of any geometry and a fast and residue-free removal from batch reactors. In this study a permanently immobilized peroxidase (Baylase R ) has been investigated on polyester felt as a solid support as a new heterogeneous catalyst system. The polyester felt was functionalized by coating with polyvinylamine and subsequent activation with glutaraldehyde as a crosslinking agent. The enzyme load on the textile surface, the activity of the immobilized protein after repeated use as well as the storage stability was evaluated. Scanning electron micrographs and UV Vis spectroscopy made it possible to verify the enzyme immobilization on the textile surface. Furthermore, the load of immobilized peroxidase was determined by ICP OE spectrometry to be 9-12 mg per gram of textile. The activity of immobilized Baylase R remained high over 35 reaction cycles and a storage period of 8 weeks.

A Process for Well-Defined Polymer Synthesis through Textile Dyeing Inspired Catalyst Immobilization

“…Textile dyeing technologies, through which fabrics are imparted with different colors using dyeing chemistry to manufacture the final textile products, provided an inspiring idea for catalyst immobilization. First, fabrics produced from cotton, polyamide, or polyester are promising carriers for catalyst immobilization due to the following advantages: (1) good mechanical properties, excellent durability, high chemical resistance, smooth surfaces, and good processability; , (2) the intrinsic flexibility of fabrics makes them capable of being fitted in any reactor geometry and being separated easily without leaving any residues; (3) pore diffusion, which will influence the reactivity of the catalyst, can also be avoided due to the smooth fabric surface; (4) pendant groups on the surface of the polymeric fabrics, for instance, hydroxyl groups on the surface of cellulosic fabrics, or amino groups on the wool fabrics, are powerful moieties for anchoring catalysts; , (5) manufacturing costs for fabrics are much lower than other solid supports, which is especially true for cotton considered as a nearly inexhaustible natural source for fabric production. , Therefore, a variety of bioactive molecules and organocatalysts have been extensively immobilized on fabrics made of cotton, , wool, polyester, , poly­(ethylene terephthalate), ,, poly­(vinyl alcohol), and poly­(amide 6.6). ,, …”

Superelastic and Fire-Retardant Nano-/Microfibrous Sponges for High-Efficiency Warmth Retention

“…9,10 However, the warmth retention property of the down would rapidly reduce under the high relative humidity (RH) due to poor hydrophobicity. 11 In contrast, the hydrophobic synthetic fiber assemblies, including polyester (PET), 12 polypropylene, 13 polyacrylonitrile, 14 and so forth, showed great prospects owing to their advantages of high strength, moisture-proof, and good processability. 15,16 However, the synthetic warmth retention materials exhibited moderate heat preservation capability with high thermal conductivity because of the large fiber diameter (>10 μm).…”

“…At present, the conventional warmth retention materials could be classified into natural fiber assemblies and synthetic fiber assemblies. − The down as representative natural warmth retention materials, possessed relatively low thermal conductivity, which is attributed to its highly fluffy structure. , However, the warmth retention property of the down would rapidly reduce under the high relative humidity (RH) due to poor hydrophobicity . In contrast, the hydrophobic synthetic fiber assemblies, including polyester (PET), polypropylene, polyacrylonitrile, and so forth, showed great prospects owing to their advantages of high strength, moisture-proof, and good processability. , However, the synthetic warmth retention materials exhibited moderate heat preservation capability with high thermal conductivity because of the large fiber diameter (>10 μm). It has been acknowledged that reducing the fiber diameter would decrease the pore size and improve the porosity of fluffy fiber assemblies, which would be beneficial to enhance warmth retention performance by locking still air .…”