Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspension
Controlling the self-assembly(SA) of cellulose nanocrystals(CNC) and graphene-oxide(GO) sheets at nanoscale is crucial for exploiting properties of both CNC and GO. The SA mechanism of GO, CNC and CNC/GO in suspension is evaluated at different concentrations and mixing ratios. SAXS determine the int...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522001939 |
| _version_ | 1811332188451373056 |
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| author | Vikram Singh Raghuwanshi Swambabu Varanasi Warren Batchelor Gil Garnier |
| author_facet | Vikram Singh Raghuwanshi Swambabu Varanasi Warren Batchelor Gil Garnier |
| author_sort | Vikram Singh Raghuwanshi |
| collection | DOAJ |
| description | Controlling the self-assembly(SA) of cellulose nanocrystals(CNC) and graphene-oxide(GO) sheets at nanoscale is crucial for exploiting properties of both CNC and GO. The SA mechanism of GO, CNC and CNC/GO in suspension is evaluated at different concentrations and mixing ratios. SAXS determine the interparticle distance, interaction and distribution of CNC and GO to resolve the self-assembling mechanism. At lower concentrations, the GO sheets are distributed randomly and separated by a large inter-sheet distance of 83 nm with poor inter-sheet interaction. As increases the GO concentration, the inter-sheet repulsion results in a nematic arrangement with the inter-sheet distance decreasing from 83 to 52 nm. Mixing isotropic and nematic phase of CNC with GO at different CNC/GO ratio from 2 to 50 shows transitions from isotropic, to biphasic and nematic state. In isotropic state, at low CNC/GO ratio, the GO sheets are randomly distributed between the CNC rods which increases the CNC inter-rod distance from 22 to 51 nm. However, at higher CNC/GO ratios, steric repulsion from the large amount of CNC forces the GO sheets to align following the direction of CNC nematic assembly. Understanding SA mechanisms of nanostructures in CNC-GO hybrid will enable to engineer applications for sensor, electronics and diagnostics. |
| first_indexed | 2024-04-13T16:33:07Z |
| format | Article |
| id | doaj.art-1bcf2ccb652748eaafff09a5ed3e92ba |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-13T16:33:07Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-1bcf2ccb652748eaafff09a5ed3e92ba2022-12-22T02:39:31ZengElsevierMaterials & Design0264-12752022-04-01216110572Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspensionVikram Singh Raghuwanshi0Swambabu Varanasi1Warren Batchelor2Gil Garnier3Bioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia; Corresponding authors at: Bioresource Processing Research Institute of Australia (BioPRIA), Monash University, Clayton, Vic-3800, AustraliaDepartment of Chemical Engineering, Indian Institute of Technology-Kharagpur, Kharagpur, West Bengal, IndiaBioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, AustraliaBioresource Processing Research Institute of Australia (BioPRIA), Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia; Corresponding authors at: Bioresource Processing Research Institute of Australia (BioPRIA), Monash University, Clayton, Vic-3800, AustraliaControlling the self-assembly(SA) of cellulose nanocrystals(CNC) and graphene-oxide(GO) sheets at nanoscale is crucial for exploiting properties of both CNC and GO. The SA mechanism of GO, CNC and CNC/GO in suspension is evaluated at different concentrations and mixing ratios. SAXS determine the interparticle distance, interaction and distribution of CNC and GO to resolve the self-assembling mechanism. At lower concentrations, the GO sheets are distributed randomly and separated by a large inter-sheet distance of 83 nm with poor inter-sheet interaction. As increases the GO concentration, the inter-sheet repulsion results in a nematic arrangement with the inter-sheet distance decreasing from 83 to 52 nm. Mixing isotropic and nematic phase of CNC with GO at different CNC/GO ratio from 2 to 50 shows transitions from isotropic, to biphasic and nematic state. In isotropic state, at low CNC/GO ratio, the GO sheets are randomly distributed between the CNC rods which increases the CNC inter-rod distance from 22 to 51 nm. However, at higher CNC/GO ratios, steric repulsion from the large amount of CNC forces the GO sheets to align following the direction of CNC nematic assembly. Understanding SA mechanisms of nanostructures in CNC-GO hybrid will enable to engineer applications for sensor, electronics and diagnostics.http://www.sciencedirect.com/science/article/pii/S0264127522001939Cellulose nanocrystalsGraphene oxideSelf-assemblyIsotropicNematicSmall angle X-ray scattering |
| spellingShingle | Vikram Singh Raghuwanshi Swambabu Varanasi Warren Batchelor Gil Garnier Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspension Materials & Design Cellulose nanocrystals Graphene oxide Self-assembly Isotropic Nematic Small angle X-ray scattering |
| title | Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspension |
| title_full | Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspension |
| title_fullStr | Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspension |
| title_full_unstemmed | Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspension |
| title_short | Cellulose nanocrystals to modulate the self-assembly of graphene oxide in suspension |
| title_sort | cellulose nanocrystals to modulate the self assembly of graphene oxide in suspension |
| topic | Cellulose nanocrystals Graphene oxide Self-assembly Isotropic Nematic Small angle X-ray scattering |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522001939 |
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