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Title: Effect of nanoparticles size and polyelectrolyte on nanoparticles aggregation in a cellulose fibrous matrix

Abstract

Controlling nanoparticles (NPs) aggregation in cellulose/NPs composites allows to optimise NPs driven properties and their applications. Polyelectrolytes are used to control NPs aggregation and their retention within the fibrous matrix. Here in this study, we aim at evaluating how a polyelectrolyte (Cationic Polyacrylamide; CPAM, molecular weight: 13 MDa, charge: 50%, Radius of gyration: 30–36 nm) adsorbs and re-conforms onto the surface of silica(SiO2) NPs differing in diameter (8, 22 and 74 nm) and to investigate the respective NPs aggregation in cellulose matrices. SEM shows the local area distribution of NPs in composites. Ultra-SAXS (USAXS) allows to evaluate the average NPs size distribution and the inter-particle interactions at length scale ranging from 1 to 1000 nm. USAXS data analysis reveals that CPAM covers multiple NPs of the smaller diameter (8 nm), presumably with a single chain to form large size NPs aggregates. As the NPs diameter is increased to 22 nm, CPAM re-conforms over NP surface forming a large shell of thickness 5.5 nm. For the composites with NPs of diameter 74 nm, the CPAM chain re-conforms further onto NP surface and the surrounding shell thickness decreases to 2.2 nm. Lastly, structure factor analysis reveals higher structural ordering for NPs asmore » increases their diameter, which is caused by different conformations adopted by CPAM onto NPs surface.« less

Authors:
 [1];  [1]; ORCiD logo [2];  [1]; ORCiD logo [1]
+ Show Author Affiliations
  1. Monash Univ., Clayton, VIC (Australia). Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; Australian Research Council
OSTI Identifier:
1415569
Alternate Identifier(s):
OSTI ID: 1566236
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Colloid and Interface Science
Additional Journal Information:
Journal Volume: 510; Journal Issue: C; Journal ID: ISSN 0021-9797
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Cationic Polyacrylamide (CPAM); Cellulose; Polyelectrolyte; Silica; Ultra SAXS (USAXS)

Citation Formats

Raghuwanshi, Vikram Singh, Garusinghe, Uthpala Manavi, Ilavsky, Jan, Batchelor, Warren J., and Garnier, Gil. Effect of nanoparticles size and polyelectrolyte on nanoparticles aggregation in a cellulose fibrous matrix. United States: N. p., 2017. Web. doi:10.1016/j.jcis.2017.09.064.
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Raghuwanshi, Vikram Singh, Garusinghe, Uthpala Manavi, Ilavsky, Jan, Batchelor, Warren J., & Garnier, Gil. Effect of nanoparticles size and polyelectrolyte on nanoparticles aggregation in a cellulose fibrous matrix. United States. https://doi.org/10.1016/j.jcis.2017.09.064
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Raghuwanshi, Vikram Singh, Garusinghe, Uthpala Manavi, Ilavsky, Jan, Batchelor, Warren J., and Garnier, Gil. Mon . "Effect of nanoparticles size and polyelectrolyte on nanoparticles aggregation in a cellulose fibrous matrix". United States. https://doi.org/10.1016/j.jcis.2017.09.064. https://www.osti.gov/servlets/purl/1415569.
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@article{osti_1415569,
title = {Effect of nanoparticles size and polyelectrolyte on nanoparticles aggregation in a cellulose fibrous matrix},
author = {Raghuwanshi, Vikram Singh and Garusinghe, Uthpala Manavi and Ilavsky, Jan and Batchelor, Warren J. and Garnier, Gil},
abstractNote = {Controlling nanoparticles (NPs) aggregation in cellulose/NPs composites allows to optimise NPs driven properties and their applications. Polyelectrolytes are used to control NPs aggregation and their retention within the fibrous matrix. Here in this study, we aim at evaluating how a polyelectrolyte (Cationic Polyacrylamide; CPAM, molecular weight: 13 MDa, charge: 50%, Radius of gyration: 30–36 nm) adsorbs and re-conforms onto the surface of silica(SiO2) NPs differing in diameter (8, 22 and 74 nm) and to investigate the respective NPs aggregation in cellulose matrices. SEM shows the local area distribution of NPs in composites. Ultra-SAXS (USAXS) allows to evaluate the average NPs size distribution and the inter-particle interactions at length scale ranging from 1 to 1000 nm. USAXS data analysis reveals that CPAM covers multiple NPs of the smaller diameter (8 nm), presumably with a single chain to form large size NPs aggregates. As the NPs diameter is increased to 22 nm, CPAM re-conforms over NP surface forming a large shell of thickness 5.5 nm. For the composites with NPs of diameter 74 nm, the CPAM chain re-conforms further onto NP surface and the surrounding shell thickness decreases to 2.2 nm. Lastly, structure factor analysis reveals higher structural ordering for NPs as increases their diameter, which is caused by different conformations adopted by CPAM onto NPs surface.},
doi = {10.1016/j.jcis.2017.09.064},
journal = {Journal of Colloid and Interface Science},
number = C,
volume = 510,
place = {United States},
year = {Mon Sep 18 00:00:00 EDT 2017},
month = {Mon Sep 18 00:00:00 EDT 2017}
}
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https://doi.org/10.1016/j.jcis.2017.09.064
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    Works referencing / citing this record:

    Water Resistant Cellulose – Titanium Dioxide Composites for Photocatalysis
    journal, February 2018

    • Garusinghe, Uthpala M.; Raghuwanshi, Vikram S.; Batchelor, Warren
    • Scientific Reports, Vol. 8, Issue 1
    • DOI: 10.1038/s41598-018-20569-w

    Water Resistant Cellulose – Titanium Dioxide Composites for Photocatalysis
    journal, February 2018

    • Garusinghe, Uthpala M.; Raghuwanshi, Vikram S.; Batchelor, Warren
    • Scientific Reports, Vol. 8, Issue 1
    • DOI: 10.1038/s41598-018-20569-w
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