biological properties of polyester
If enzymes can hydrolyze ester linkage in PET fabrics, polar hydroxyl (-OH) and carboxyl (-COOH) groups will be formed on the surface of PET fabrics. Enzymatic hydrolysis on synthetic fibers enhances the hydrophillicity and solves the concerns regarding the environmental issues of the textile industry. • Terelene (UK) From its inception Textile Today has already created a good impression and strong reputation in global market. In fact, it is now possible that large-scale production of PHA by transgenic plants can be achieved in the near future. Copyright © 2020 Elsevier B.V. or its licensors or contributors. Page 5 6. C6H4-CO-O-).DuPont Company of USA first produced polyester fibres on commercial scale in 1953. Polyester fibres are formed from synthetic polymers, manufactured by the action of poly-functional
Polyester is a synthetic fabric that’s usually derived from petroleum. The treatment offers better dye uptake which enhances the color values. Of significant interest are the findings that PHA can consist of various hydroxyalkanoate monomers, and the cloning of its biosynthesis genes. Only a few studies have been reported regarding enzymatic modification of PET fabric . Scribd will begin operating the SlideShare business on December 1, 2020 The stretching in the region of 3600-3200 is responsible for the hydrophillicity of lipase and alkaline hydrolyzed polyester. There are many research paper writing services available now. Polyester
The biological activities of macrocyclic jatrophane polyesters 1–3 from the Sardinian endemism Euphorbia semiperfoliata Viv.
However, PET has undesirable properties such as pilling, static and lack of dyeability associated with its hydrophobic nature. The most conventional and industrially way to modify polyester fabrics is an alkaline treatment [5, 6, 7].
The stretching is very high in the case of lipase hydrolyzed polyester which makes the enzyme-treated more hydrophilic. The properties of polyester fabrics include: inexpensive cost; superior strength and resilience; lightweight; hydrophobic (it feels dry or moves moisture effects away from touch); it has an unusually high melting point; is resistant to dyes, solvents and most chemicals; stain resistant; resists stretching and shrinking; quick drying; wrinkle, mildew and abrasion resistant; retains heat-set pleats and creases and is easy to launder. Biological properties of Polyester Polyesters have good resistance against micro organisms, larvae, fungi, mildew and moulds. Abstract Purpose. This intriguing biological polyester initially attracted the attention of microbiologists and managed to keep many polymer scientists occupied over the second half of the last century. 3.7 Effect of enzyme treatment on the low-stress mechanical properties of polyester.
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It is mainly due to the degradation of chain links and the addition of hydroxyl groups and enhances the dye uptake of the polyester fabrics. + (2n-1) H2O The extent of damage is shown in figure 1. Commercial or trade names of polyester Chemically, polyester is a polymer primarily composed of compounds within the ester functional group. 3.3 Effect of lipase treatment on surface characteristics of polyester fabrics. The alkaline treated, lipase treated and dyed fabrics are tested by reflectance type spectrophotometer to know the K/S values.
The physical properties of PHA homopolymers as well as co- and heteropolymers have been the subject of study in various laboratories all over the world.
This intriguing biological polyester initially attracted the attention of microbiologists and managed to keep many polymer scientists occupied over the second half of the last century.
• Lavson (Russia)
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