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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14888
Title: Synergistic effect of cellulose nanofibres and bio- extracts for fabricating high strength sodium alginate based composite bio-sponges with antibacterial properties
Authors: Yadav C.
Maji, Pradip K.
Published in: Carbohydrate Polymers
Abstract: This study investigates the synergistic potential of natural bio-extracts for preparing “all-natural” composite bio-sponges of sodium alginate (SA) with the reinforcement of a natural bio-nanomaterial i.e., cellulose nanofibres (CNFs). Aqueous suspensions of SA and CNFs in various combinations of bio-extracts (Rice water (Rw) and Giloy extract (Ge)) were freeze-dried to obtain the composite bio-sponges. Composites prepared using Rw resulted in structurally more stable samples with porosity above 75% that showed a compact honeycomb-like microstructure with interlocked CNFs network structures. A significant improvement in mechanical performance (400% increment in compressive strength and 800% increment in modulus) and thermal stability (decomposition temperature reaching up to 240 °C from 200 °C) for SA based composite bio-sponges was achieved due to the synergistic effect of Rw and CNFs as compared to conventionally prepared sponges in water. Additionally, the use of Ge has resulted in developing antimicrobial surfaces with up to 98% and 90% growth inhibition efficiency for gram-negative and gram-positive bacteria, respectively. Hence, CNFs and bio-extracts together played a competent role in effective tailoring of structural, thermo-mechanical and antibacterial properties of composite bio-sponges. © 2018 Elsevier Ltd
Citation: Carbohydrate Polymers (2019), 203(): 396-408
URI: https://doi.org/10.1016/j.carbpol.2018.09.050
http://repository.iitr.ac.in/handle/123456789/14888
Issue Date: 2019
Publisher: Elsevier Ltd
Keywords: Antibacterial activity
Bio-sponge
Cellulose nanofibres
Compressive strength
Sodium alginate
ISSN: 1448617
Author Scopus IDs: 57193354539
56249287900
Author Affiliations: Yadav, C., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, U.P. 247001, India
Maji, P.K., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, U.P. 247001, India
Funding Details: This research project has been supported by the Science and Engineering Research Board, Govt of India , under the Early Career Research Award (Grant No. ECR/2016/000621/CS ). The author Chandravati is grateful to Mr. Ashish Kumar Mishra, Product Manager, Advance Scientific Equipment Pvt. Ltd., New Delhi and Mr. Saroj Kumar Jha, Technical Officer, AIRF, JNU, New Delhi, for their technical assistance related to atomic force microscopy.
Corresponding Author: Maji, P.K.; Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, India; email: pradip.fpt@iitr.ac.in
Appears in Collections:Journal Publications [PE]

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