Study on Spectroscopic and Dyeing Characteristics of Curcumin on Poly(lactic acid) and Poly(ethylene terephthalate) Fabrics

2011 ◽  
Vol 233-235 ◽  
pp. 1384-1387 ◽  
Author(s):  
Vorabodee Sriumaroum ◽  
Sarit Liprapan ◽  
Benjawan Siriphet ◽  
Suesat Jantip ◽  
Potjanart Suwanruji
Keyword(s):  
Lactic Acid ◽  
Ethyl Acetate ◽  
Ethylene Terephthalate ◽  
Bathochromic Shift ◽  
Spectroscopic Properties ◽  
Methyl Benzoate ◽  
Poly Lactic Acid ◽  
Poly Ethylene Terephthalate ◽  
Color Yield ◽  
Poly Ethylene

This research aimed to study the use of curcumin as a natural dye for dyeing poly(lactic acid) and poly(ethylene terephthalate) fabrics. The study found that curcumin was dyeable on PLA and PET, providing a brilliant yellow color on the fabric. Curcumin could build up very well on PLA, while lower build up was on PET. At the same applied concentration, higher color yield was observed on the dyed PLA fabric. To achieve the same visual color yield, a significantly lower concentration of curcumin was required for PLA as compared with PET. The color shade of curcumin-dyed PLA differed from the PET analogue. A bathochromic shift of the K/S curve was found when the substrate was changed from PLA to PET. The influence of polymer media on the spectroscopic properties of curcumin could be elucidated by measuring absorbance properties of curcumin in ethyl acetate and methyl benzoate, being representatives of PLA and PET, respectively. At the same concentration, curcumin solution in ethyl acetate exhibited higher absorbance than that in methyl benzoate, corresponding to the deeper shade obtained when dyed on PLA as compared with PET. Bathochromic shift of absorbance curve was also observed when the solvent was changed from ethyl acetate to methyl benzoate.

Immobilization of trypsin onto poly(ethylene terephthalate)/poly(lactic acid) nonwoven nanofiber mats

2015 ◽  
Vol 104 ◽  
pp. 48-56 ◽  
Author(s):  
Teresa R. Silva ◽  
Daniela P. Rodrigues ◽  
Jorge M.S. Rocha ◽  
M. Helena Gil ◽  
Susana C.S. Pinto ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Ethylene Terephthalate ◽  
Poly Lactic Acid ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Nanofiber Mats

Compatibility and physical properties of poly(lactic acid)/poly(ethylene terephthalate glycol) blends

2012 ◽  
Vol 20 (12) ◽  
pp. 1300-1306 ◽  
Author(s):  
Jun Yong Park ◽  
Sung Yeon Hwang ◽  
Won Jae Yoon ◽  
Eui Sang Yoo ◽  
Seung Soon Im
Keyword(s):  
Lactic Acid ◽  
Physical Properties ◽  
Ethylene Terephthalate ◽  
Poly Lactic Acid ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

scholarly journals Strategies and progress in synthetic textile fiber biodegradability

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Jeannie Egan ◽  
Sonja Salmon
Keyword(s):  
Lactic Acid ◽  
Waste Management ◽  
Ethylene Terephthalate ◽  
Natural Fiber ◽  
Poly Lactic Acid ◽  
Textile Fiber ◽  
Textile Fibers ◽  
Textile Waste ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Abstract The serious issue of textile waste accumulation has raised attention on biodegradability as a possible route to support sustainable consumption of textile fibers. However, synthetic textile fibers that dominate the market, especially poly(ethylene terephthalate) (PET), resist biological degradation, creating environmental and waste management challenges. Because pure natural fibers, like cotton, both perform well for consumer textiles and generally meet certain standardized biodegradability criteria, inspiration from the mechanisms involved in natural biodegradability are leading to new discoveries and developments in biologically accelerated textile waste remediation for both natural and synthetic fibers. The objective of this review is to present a multidisciplinary perspective on the essential bio-chemo-physical requirements for textile materials to undergo biodegradation, taking into consideration the impact of environmental or waste management process conditions on biodegradability outcomes. Strategies and recent progress in enhancing synthetic textile fiber biodegradability are reviewed, with emphasis on performance and biodegradability behavior of poly(lactic acid) (PLA) as an alternative biobased, biodegradable apparel textile fiber, and on biological strategies for addressing PET waste, including industrial enzymatic hydrolysis to generate recyclable monomers. Notably, while pure PET fibers do not biodegrade within the timeline of any standardized conditions, recent developments with process intensification and engineered enzymes show that higher enzymatic recycling efficiency for PET polymer has been achieved compared to cellulosic materials. Furthermore, combined with alternative waste management practices, such as composting, anaerobic digestion and biocatalyzed industrial reprocessing, the development of synthetic/natural fiber blends and other strategies are creating opportunities for new biodegradable and recyclable textile fibers. Article Highlights Poly(lactic acid) (PLA) leads other synthetic textile fibers in meeting both performance and biodegradation criteria. Recent research with poly(ethylene terephthalate) (PET) polymer shows potential for efficient enzyme catalyzed industrial recycling. Synthetic/natural fiber blends and other strategies could open opportunities for new biodegradable and recyclable textile fibers.

Thermal migration of selected disperse dyes on poly(ethylene terephthalate) and poly(lactic acid) (Ingeo+) fibres

2004 ◽  
Vol 120 (5) ◽  
pp. 260-264 ◽  
Author(s):  
Duncan Phillips ◽  
Jantip Suesat ◽  
John A Taylor ◽  
Mike Wilding ◽  
David Farrington ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Ethylene Terephthalate ◽  
Poly Lactic Acid ◽  
Disperse Dyes ◽  
Thermal Migration ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

scholarly journals Recycling of Mixed Poly(Ethylene-terephthalate) and Poly(Lactic Acid)

2019 ◽  
Vol 253 ◽  
pp. 02005
Author(s):  
Daniel Gere ◽  
Tibor Czigany
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Lactic Acid ◽  
Impact Strength ◽  
Ethylene Terephthalate ◽  
Poly Lactic Acid ◽  
Elongation At Break ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Thermal Stability Of

Nowadays, PLA is increasingly used as a packaging material, therefore it may appear in the petrol-based polymer waste stream. However, with the today’s mechanical recycling technologies PLA and PET bottles cannot be easily or cheaply separated. Therefore, our goal was to investigate the mechanical, morphological and thermal properties of different PET and PLA compounds in a wide range of compositions. We made different compounds from poly(ethylene-terephthalate) (PET) and poly(lactic acid) (PLA) by extrusion, and injection molded specimens from the compounds. We investigated the mechanical properties and the phase morphology of the samples and the thermal stability of the regranulates. PET and PLA are thermodynamically immiscible, therefore we observed a typical island-sea type morphology in SEM micrographs. When PLA was added, the mechanical properties (tensile strength, modulus, elongation at break and impact strength) changed significantly. The Young’s modulus increased, while elongation at break and impact strength decreased with the increase of the weight fraction of PLA. The TGA results indicated that the incorporation of PLA decreased the thermal stability of the PET/PLA blends.

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