Chemical recycling of waste poly(ethylene terephthalate) fibers into azo disperse dyestuffs
RSC Advances Pub Date: 2014-09-05 DOI: 10.1039/C4RA07608G
Abstract
In this study, waste poly(ethylene terephthalate) (PET) fibers were chemically recycled into azo disperse dyestuffs. First, waste PET fibers were glycolytically degraded by excess ethylene glycol utilizing zinc acetate dehydrate as a catalyst. The glycolysis product, bis(2-hydroxyethyl) terephthalate (BHET), was purified through recrystallization and hydrolyzed into terephthalic acid (TPA). Thereafter, BHET and TPA were nitrated, reduced and azotized to obtain diazonium salts. Finally, the obtained diazonium salts were coupled with N,N-dimethylaniline to obtain azo disperse dyestuffs (dye A and dye B, respectively). The depolymerized products (BHET and TPA) and azo disperse dyestuffs (dyes A and B) were characterized by FTIR and 1H NMR spectroscopy. Nylon and polyester filaments were dyed with the synthesized azo dyestuffs with the dye bath pH ranging from 3.6 to 5.8. The performances of the dyestuffs were described by maximum absorption wavelength, K/S, L*, a* and b* values.
Recommended Literature
- [1] Enabling shape memory and healable effects in a conjugated polymer by incorporating siloxane via dynamic imine bond? Yaling Zhang,Chunhui Dai,Shiwei Zhou,Bin LiuChem. Commun., 2018,54, 10092-10095 10.1039/C8CC05410J
- [2] Fe(iii)-mediated isomerization of α,α-diarylallylic alcohols to ketones via radical 1,2-aryl migration? Ziyang Deng,Changwei Chen,Sunliang CuiRSC Adv., 2016,6, 93753-93755 10.1039/C6RA20007A
- [3] Dissolution of cork biopolymers in biocompatible ionic liquids Helga Garcia,Rui Ferreira,Marija Petkovic,Jamie L. Ferguson,Maria C. Leit?o,H. Q. Nimal Gunaratne,Luís Paulo N. RebeloGreen Chem., 2010,12, 367-369 10.1039/B922553F
- [4] Examination of ammonia–poly(pyrrole) interactions by piezoelectric and conductivity measurements Analyst, 1991,116, 1125-1130 10.1039/AN9911601125
- [5] Enabling non-flammable Li-metal batteries via electrolyte functionalization and interface engineering? Jing Yu,Yu-Qi Lyu,Jiapeng Liu,Mohammed B. Effat,Junxiong WuJ. Mater. Chem. A, 2019,7, 17995-18002 10.1039/C9TA03784E
- [6] Estimating and correcting interference fringes in infrared spectra in infrared hyperspectral imaging Ghazal Azarfar,Ebrahim Aboualizadeh,Nicholas M. Walter,Simona Ratti,Camilla Olivieri,Alessandra Norici,Michael Nasse,Achim Kohler,Mario GiordanoAnalyst, 2018,143, 4674-4683 10.1039/C8AN00093J
- [7] Evolution of important glucosinolates in three common Brassica vegetables during their processing into vegetable powder and in vitro gastric digestion Nan Fu,Naphaporn Chiewchan,Xiao Dong ChenFood Funct., 2020,11, 211-220 10.1039/C9FO00811J
- [8] Emerging investigator series: heterogeneous reactions of sulfur dioxide on mineral dust nanoparticles: from single component to mixed components? Tao Wang,Yangyang Liu,Yue Deng,Hongbo Fu,Jianmin ChenEnviron. Sci.: Nano, 2018,5, 1821-1833 10.1039/C8EN00376A
- [9] Examination of deposit in commercial diluted phosphoric acid Analyst, 1880,5, 146-147 10.1039/AN8800500146
- [10] Evidence for the intrinsic nature of band-gap states electrochemically observed on atomically flat TiO2(110) surfaces? Shintaro Takata,Yoshihiro MiuraPhys. Chem. Chem. Phys., 2014,16, 24784-24789 10.1039/C4CP03280B
Journal Name：RSC Advances
research_products
-
CAS no.: 89640-58-4
![N-(3-cyanothiolan-3-yl)-2-[(2,2,2-trifluoroethyl)sulfanyl]pyridine-4-carboxamide](https://ossimg.kuujia.com/scimg/1444500/1444113-98-7x500.png)
![1,2,3,4,5,6-Hexahydro-[2,3]bipyridinyl-6-ol](https://ossimg.kuujia.com/scimg/1271000/1270529-38-8x500.png)
![2,2-Difluoro-3-[methyl(2-methylbutyl)amino]propanoic acid](https://ossimg.kuujia.com/scimg/2138500/2138166-62-6x500.png)
![2-(1H-indol-3-yl)-N-{[6-(thiophen-2-yl)-[1,2,4]triazolo[4,3-b]pyridazin-3-yl]methyl}acetamide](https://ossimg.kuujia.com/scimg/2034500/2034271-14-0x500.png)