Polydopamine-assisted grafting of chitosan on porous poly (L-lactic acid) electrospun membranes for adsorption of heavy metal ions

Qasim Zia; Madeeha Tabassum; Jinmin Meng; Zhiying Xin; Hugh Gong; Jiashen Li

doi:10.1016/j.ijbiomac.2020.11.101

Polydopamine-assisted grafting of chitosan on porous poly (L-lactic acid) electrospun membranes for adsorption of heavy metal ions

Qasim Zia, Madeeha Tabassum, Jinmin Meng, Zhiying Xin, Hugh Gong, Jiashen Li

Queen Mary University of London

Research output: Contribution to journal › Article › peer-review

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Abstract

In this study, a versatile method for the manufacturing of chitosan-grafted porous poly (L-lactic acid) (P-PLLA) nanofibrous membrane by using polydopamine (PDA) as an intermediate layer has been developed. P-PLLA fibres
were electrospun and collected as nano/micro fibrous membranes. Highly porous fibres could serve as a substrate for chitosan to adsorb heavy metal ions. Moreover, PDA was used to modify P-PLLA surface to increase the coating
uniformity and stability of chitosan. Due to the very high surface area of P-PLLA membranes and abundant amine groups of both PDA and chitosan, the fabricated membranes were utilized as adsorbent for removal of copper
(Cu2+) ions from the wastewater. The adsorption capability of Cu2+ ions was examined with respect to the PDA polymerization times, pH, initial metal ion concentration and time. Finally, the equilibrium adsorption data of chitosan-grafted membranes fitted well with the Langmuir isotherm with the maximum adsorption capacity of 270.27 mg/g.

Original language	English
Number of pages	12
Journal	International Journal of Biological Macromolecules
Early online date	19 Nov 2020
DOIs	https://doi.org/10.1016/j.ijbiomac.2020.11.101
Publication status	E-pub ahead of print - 19 Nov 2020

Keywords

Polydopamine
Chitosan
PLLA
Electrospinning
Grafting

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijbiomac.2020.11.101

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@article{70855c0fa59b49fb9326ea6fba0b3295,

title = "Polydopamine-assisted grafting of chitosan on porous poly (L-lactic acid) electrospun membranes for adsorption of heavy metal ions",

abstract = "In this study, a versatile method for the manufacturing of chitosan-grafted porous poly (L-lactic acid) (P-PLLA) nanofibrous membrane by using polydopamine (PDA) as an intermediate layer has been developed. P-PLLA fibreswere electrospun and collected as nano/micro fibrous membranes. Highly porous fibres could serve as a substrate for chitosan to adsorb heavy metal ions. Moreover, PDA was used to modify P-PLLA surface to increase the coatinguniformity and stability of chitosan. Due to the very high surface area of P-PLLA membranes and abundant amine groups of both PDA and chitosan, the fabricated membranes were utilized as adsorbent for removal of copper(Cu2+) ions from the wastewater. The adsorption capability of Cu2+ ions was examined with respect to the PDA polymerization times, pH, initial metal ion concentration and time. Finally, the equilibrium adsorption data of chitosan-grafted membranes fitted well with the Langmuir isotherm with the maximum adsorption capacity of 270.27 mg/g.",

keywords = "Polydopamine, Chitosan, PLLA, Electrospinning, Grafting",

author = "Qasim Zia and Madeeha Tabassum and Jinmin Meng and Zhiying Xin and Hugh Gong and Jiashen Li",

year = "2020",

month = nov,

day = "19",

doi = "10.1016/j.ijbiomac.2020.11.101",

language = "English",

journal = "International Journal of Biological Macromolecules",

issn = "0141-8130",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Polydopamine-assisted grafting of chitosan on porous poly (L-lactic acid) electrospun membranes for adsorption of heavy metal ions

AU - Zia, Qasim

AU - Tabassum, Madeeha

AU - Meng, Jinmin

AU - Xin, Zhiying

AU - Gong, Hugh

AU - Li, Jiashen

PY - 2020/11/19

Y1 - 2020/11/19

N2 - In this study, a versatile method for the manufacturing of chitosan-grafted porous poly (L-lactic acid) (P-PLLA) nanofibrous membrane by using polydopamine (PDA) as an intermediate layer has been developed. P-PLLA fibreswere electrospun and collected as nano/micro fibrous membranes. Highly porous fibres could serve as a substrate for chitosan to adsorb heavy metal ions. Moreover, PDA was used to modify P-PLLA surface to increase the coatinguniformity and stability of chitosan. Due to the very high surface area of P-PLLA membranes and abundant amine groups of both PDA and chitosan, the fabricated membranes were utilized as adsorbent for removal of copper(Cu2+) ions from the wastewater. The adsorption capability of Cu2+ ions was examined with respect to the PDA polymerization times, pH, initial metal ion concentration and time. Finally, the equilibrium adsorption data of chitosan-grafted membranes fitted well with the Langmuir isotherm with the maximum adsorption capacity of 270.27 mg/g.

AB - In this study, a versatile method for the manufacturing of chitosan-grafted porous poly (L-lactic acid) (P-PLLA) nanofibrous membrane by using polydopamine (PDA) as an intermediate layer has been developed. P-PLLA fibreswere electrospun and collected as nano/micro fibrous membranes. Highly porous fibres could serve as a substrate for chitosan to adsorb heavy metal ions. Moreover, PDA was used to modify P-PLLA surface to increase the coatinguniformity and stability of chitosan. Due to the very high surface area of P-PLLA membranes and abundant amine groups of both PDA and chitosan, the fabricated membranes were utilized as adsorbent for removal of copper(Cu2+) ions from the wastewater. The adsorption capability of Cu2+ ions was examined with respect to the PDA polymerization times, pH, initial metal ion concentration and time. Finally, the equilibrium adsorption data of chitosan-grafted membranes fitted well with the Langmuir isotherm with the maximum adsorption capacity of 270.27 mg/g.

KW - Polydopamine

KW - Chitosan

KW - PLLA

KW - Electrospinning

KW - Grafting

U2 - 10.1016/j.ijbiomac.2020.11.101

DO - 10.1016/j.ijbiomac.2020.11.101

M3 - Article

SN - 0141-8130

JO - International Journal of Biological Macromolecules

JF - International Journal of Biological Macromolecules

ER -

Polydopamine-assisted grafting of chitosan on porous poly (L-lactic acid) electrospun membranes for adsorption of heavy metal ions

Abstract

Keywords

UN SDGs

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