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Erschienen in: Cellulose 4/2021

15.01.2021 | Original Research

Adsorption, kinetics, and thermodynamic studies of cacao husk extracts in waterless sustainable dyeing of cotton fabric

verfasst von: Md. Yousuf Hossain, Wenju Zhu, Md. Nahid Pervez, Xiaojun Yang, Shamima Sarker, Mohammad Mahbubul Hassan, Md. Ikram Ul Hoque, Vincenzo Naddeo, Yingjie Cai

Erschienen in: Cellulose | Ausgabe 4/2021

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Abstract

Natural dyes exhibit a low dye uptake when cellulosic fiber dyeing is carried out using a conventional water bath dyeing process. In this research, cotton fabric was exhaust dyed in a microemulsion dyebath containing cacao husk extracts dye and decamethylcyclopentasiloxane (D5) to achieve higher dye exhaustion percentage on cotton fiber, which is an environmentally beneficial dyeing process. The adsorption behavior of cacao husk extract dye in a D5 microemulsion system was investigated under conditions of varied dye mass (1–8% o.w.f), dyeing time (5–500 min), and dyeing temperatures (333–373 K). Kinetic modelling of cacao husk extracts dye/D5 adsorption on cotton fiber was studied by fitting experimental data to pseudo first-order and pseudo second-order kinetics, and the intraparticle diffusion model. Early results indicated that the kinetic model of adsorption of cacao husk extracts dye on cotton fiber followed the pseudo second-order model. Langmuir, Freundlich, and Dubinin–Radushkevich adsorption isotherm models were employed to analyze the adsorption isotherms, and the results showed that the adsorption process fit well with the Langmuir model compared to the Freundlich isotherm. The mean adsorption energy from the Dubinin–Radushkevich isotherm model implied that adsorption of the cacao husk extracts onto cotton was accompanied with a physical process. The values of standard enthalpy (ΔH° > 0), standard entropy (ΔS° > 0), and Gibbs free energy (ΔG° < 0) strongly reflected that the adsorption of the cacao husk extracts onto cotton was thermodynamically favourable and feasible. Thus, waterless dyeing of cotton fabric using a natural dye/D5 system explores a sustainable dyeing technology with higher dye exhaustion percentage.

Graphic abstract

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Literatur
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Metadaten
Titel
Adsorption, kinetics, and thermodynamic studies of cacao husk extracts in waterless sustainable dyeing of cotton fabric
verfasst von
Md. Yousuf Hossain
Wenju Zhu
Md. Nahid Pervez
Xiaojun Yang
Shamima Sarker
Mohammad Mahbubul Hassan
Md. Ikram Ul Hoque
Vincenzo Naddeo
Yingjie Cai
Publikationsdatum
15.01.2021
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 4/2021
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-020-03662-0

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