Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Nanocellulose leaf-like zeolitic imidazolate framework (ZIF-L) foams for selective capture of carbon dioxide
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Number of Authors: 22019 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 213, p. 338-345Article in journal (Refereed) Published
Abstract [en]

The last decades have been witness of an ever-growing interests for the synthesis and application of metal-organic frameworks (MOFs). However, most of the current synthetic procedures produce MOFs in powder state. In this work, hybrid foams were fabricated via in situ synthesis of leaf-like zeolitic imidazolate frameworks (ZIF-L) into nanocellulose at room temperature using water as solvent, followed by a gelatin matrix incorporation and freeze-drying. The foams are ultralight weight and are highly porous with densities ranging from 19.18 to 37.4 kg.m(-3). The shapeability, hierarchical porosity, and low density of the formed foams offer promising potentials for applications such as CO2 sorption. The dispersion of ZIF-L into the cellulose network increases the material accessibility and may open new venues for further MOFs processing.

Place, publisher, year, edition, pages
2019. Vol. 213, p. 338-345
Keywords [en]
Nanocellulose, Foams, Metal-organic frameworks, Zeolitic imidazolate frameworks, CO2 adsorption
National Category
Chemical Sciences
Research subject
Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-167552DOI: 10.1016/j.carbpol.2019.03.011ISI: 000461316200037PubMedID: 30879677OAI: oai:DiVA.org:su-167552DiVA, id: diva2:1304457
Available from: 2019-04-12 Created: 2019-04-12 Last updated: 2019-11-06Bibliographically approved
In thesis
1. Cellulose Nanofibril-based Hybrid Materials: Eco-friendly design towards separation and packaging applications
Open this publication in new window or tab >>Cellulose Nanofibril-based Hybrid Materials: Eco-friendly design towards separation and packaging applications
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Nanocellulose has been lately considered as the “Holy-Grail” in the design of sustainable materials due to its bio-origin and an unprecedented combination of prominent features, including good mechanical properties, anisotropy and versatile surface chemistry. In addition, nanocellulose in the form of cellulose nanofibrils, can adopt variable structures and morphologies depending on the processing technique, such as aerogels, films and monoliths.

However, there are limitations that hinder the implementation of cellulose nanofibrils in “real-life applications”, such as inherent interaction with bacteria and proteins, thus leading to surface-fouling; and loss of integrity due to water-induced swelling. A way to overcome these challenges, and provide further functionality, is through hybridization strategies, at which the multiple components act synergistically towards specific properties and applications. In this thesis, the aim is to present multiple strategies for the synthesis of novel cellulose nanofibril-based hybrid materials, in the form of 2D-films and 3D-foams, towards their employment for separation applications or active food packaging.

A novel strategy to surface-functionalize cellulose nanofibril-membranes is proposed via grafting zwitterionic polymer brushes of poly (cysteine methacrylate). The modification can suppress the absorption of proteins in an 85%, as well as decreasing the adhesion of bacteria in an 87%, while introducing antimicrobial properties, as demonstrated against S. aureus.

The spontaneous formation of functional metal oxide nanoparticles occurring in situ on cellulose nanofibrils-films during the adsorption of metal ions from water is investigated, which occurs without the additional use of chemicals or temperature. Notably, this process not only enables the upcycling of materials through multi-stage applications, but also provides a cost-effective method to prepare multifunctional hybrid materials with enhanced dye-removal/antimicrobial activity.

The processing of functional composite films from cellulose nanofibril-stabilized Pickering emulsions and their suitability to be used as active edible barriers was demonstrated. The presence of oil in the films fine-tuned the properties of the films, as well as acted as the medium to encapsulate bio-active hydrophobic compounds, providing further functionality such as antioxidant and antimicrobial properties.

Anisotropic porous hybrid foams with ultra-high loading capacity of sorbents (e.g., zeolites and metal-organic frameworks) were produced via unidirectional freeze-casting method using cellulose nanofibrils/gelatin as template material. The foams indeed exhibited ultra-high loading capacity of sorbent nanomaterials, a linear relationship between sorbent content and CO2 adsorption capacity, and high CO2/N2 selectivity.

Place, publisher, year, edition, pages
Stockholm: Department of Materials and Environmental Chemistry, Stockholm University, 2019. p. 35
Keywords
Cellulose nanofibrils, hybrid materials, membranes, aerogels, separation, food packaging
National Category
Materials Chemistry
Research subject
Materials Chemistry
Identifiers
urn:nbn:se:su:diva-175622 (URN)978-91-7797-927-2 (ISBN)978-91-7797-928-9 (ISBN)
Public defence
2019-12-09, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 2: Submitted.

Available from: 2019-11-14 Created: 2019-11-06 Last updated: 2019-11-08Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Valencia, LuisAbdehamid, Hani Nasser
By organisation
Department of Materials and Environmental Chemistry (MMK)
In the same journal
Carbohydrate Polymers
Chemical Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 26 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf