Change search
Link to record
Permanent link

Direct link
BETA
Fu, Qiliang
Publications (9 of 9) Show all publications
Berglund, L., Li, Y., Fu, Q., Popov, S., Sychugov, I. & Yang, M. (2018). Modification of transparent wood for photonics functions. Paper presented at 255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA. Abstracts of Papers of the American Chemical Society, 255
Open this publication in new window or tab >>Modification of transparent wood for photonics functions
Show others...
2018 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-240156 (URN)000435537702571 ()
Conference
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Note

QC 20181218

Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2019-08-20Bibliographically approved
Hajian, A., Fu, Q. & Berglund, L. (2018). Recyclable and superelastic aerogels based on carbon nanotubes and carboxymethyl cellulose. Composites Science And Technology, 159, 1-10
Open this publication in new window or tab >>Recyclable and superelastic aerogels based on carbon nanotubes and carboxymethyl cellulose
2018 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 159, p. 1-10Article in journal (Refereed) Published
Abstract [en]

Deformation mechanisms are largely unknown for superelastic carbon nanotube (CNT) aerogels, and this hampers materials design efforts. The CNT network in the cell walls is typically crosslinked or connected by a thermoset polymer phase. In order to create a recyclable superelastic aerogel, unmodified single or multi-walled CNTs were dispersed in water by adding to aqueous carboxymethyl cellulose (CMC) solution. Directional freeze-drying was used to form honeycombs with cell walls of random-in-the-plane CNTs in CMC matrix. Cell wall morphology and porosity were studied and related to CNT type and content, as well as elastic or plastic buckling of the cell walls under deformation. CMC acts as a physical crosslinker for the CNTs in a porous cell wall. Aerogel structure and properties were characterized before and after recycling. The conductivity of the composite aerogel with a density of 10 kg/m3, 99% porosity and 50 wt % single-walled CNT exceeds 0.5 S/cm. The potential of these superelastic and conductive aerogels for applications such as mechanoresponsive materials was examined in cyclic conductivity tests at different strains. This opens a new route for recyclable superelastic CNT composite aerogels, avoiding material loss, chemical treatment or addition of other components.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Polymers; Nanocomposites; CNT networks; Conductivity; Recycle
National Category
Composite Science and Engineering Textile, Rubber and Polymeric Materials Nano Technology
Research subject
Materials Science and Engineering
Identifiers
urn:nbn:se:kth:diva-223432 (URN)10.1016/j.compscitech.2018.01.002 (DOI)000436214100001 ()2-s2.0-85042350204 (Scopus ID)
Note

QC 20180308

Available from: 2018-02-21 Created: 2018-02-21 Last updated: 2018-07-17Bibliographically approved
Fu, Q., Yan, M., Jungstedt, E., Yang, X., Li, Y. & Berglund, L. A. (2018). Transparent plywood as a load-bearing and luminescent biocomposite. Composites Science And Technology, 164, 296-303
Open this publication in new window or tab >>Transparent plywood as a load-bearing and luminescent biocomposite
Show others...
2018 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 164, p. 296-303Article in journal (Refereed) Published
Abstract [en]

Transparent wood (TW) structures in research studies were either thin and highly anisotropic or thick and isotropic but weak. Here, transparent plywood (TPW) laminates are investigated as load-bearing biocomposites with tunable mechanical and optical performances. Structure-property relationships are analyzed. The plies of TPW were laminated with controlled fiber directions and predetermined stacking sequence in order to control the directional dependence of modulus and strength, which would give improved properties in the weakest direction. Also, the angular dependent light scattering intensities were investigated and showed more uniform distribution. Luminescent TPW was prepared by incorporation of quantum dots (QDs) for potential lighting applications. TPW can be designed for large-scale use where multiaxial load-bearing performance is combined with new optical functionalities.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Transparent Wood, Nanotechnology, Biocomposite, Photonics
National Category
Composite Science and Engineering
Identifiers
urn:nbn:se:kth:diva-233274 (URN)10.1016/j.compscitech.2018.06.001 (DOI)000440121700036 ()2-s2.0-85048381154 (Scopus ID)
Funder
EU, European Research Council, 742733
Note

QC 20180821

Available from: 2018-08-21 Created: 2018-08-21 Last updated: 2018-08-21Bibliographically approved
Li, Y., Fu, Q., Yang, X. & Berglund, L. (2018). Transparent wood for functional and structural applications. Philosophical Transactions. Series A: Mathematical, physical, and engineering science, 376(2112), Article ID 20170182.
Open this publication in new window or tab >>Transparent wood for functional and structural applications
2018 (English)In: Philosophical Transactions. Series A: Mathematical, physical, and engineering science, ISSN 1364-503X, E-ISSN 1471-2962, Vol. 376, no 2112, article id 20170182Article, review/survey (Refereed) Published
Abstract [en]

Optically transparent wood combines mechanical performance with optical functionalities is an emerging candidate for applications in smart buildings and structural optics and photonics. The present review summarizes transparent wood preparation methods, optical and mechanical performance, and functionalization routes, and discusses potential applications. The various challenges are discussed for the purpose of improved performance, scaled-up production and realization of advanced applications. This article is part of a discussion meeting issue 'New horizons for cellulose nanotechnology'.

Place, publisher, year, edition, pages
Royal Society, 2018
Keywords
transparent wood, optical performance, mechanical performance, functionalization and application
National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:kth:diva-220989 (URN)10.1098/rsta.2017.0182 (DOI)000418591400013 ()2-s2.0-85040088506 (Scopus ID)
Note

QC 20180111

Available from: 2018-01-11 Created: 2018-01-11 Last updated: 2018-01-11Bibliographically approved
Fu, Q. (2018). Wood Nanotechnologies for Transparency, Fire Retardancy and Liquid Separation. (Doctoral dissertation). Stockholm: Royal Institute of Technology
Open this publication in new window or tab >>Wood Nanotechnologies for Transparency, Fire Retardancy and Liquid Separation
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis, wood nanotechnologies for transparent, fire-retardant and hydrophobic/lipophilic wood have been developed. There are two main parts; wood template preparation/processing concepts and materials design using these templates.

In the wood template processing part, highly porous nanostructured wood templates are prepared. Relationships between processes and material structures are studied. Three chemical treatment methods are used. Lignin and/or chromophores are removed from cell wall, so that nanoscale pores are formed in the cell wall. For preparation of transparent wood, a lignin-retaining method improves physical properties of the template. The pore structures are characterized by scanning electron microscopy and gas adsorption measurement of specific surface area. The compositions of the templates are characterized. Compared with native wood, these templates have nanoscale porosity which provides opportunity for new types of wood modification.

In the materials design part, wood nanotechnologies are used for transparent wood as well as for hydrophobic/lipophilic and fire-retardant wood. Two main strategies are used: i) nanoparticles are embedded inside the cell wall; ii) polymers are impregnated in lumen space, and sometimes also inside the cell wall. The transparent wood is prepared by MMA monomer/oligomer impregnation of lumen space. MMA has similar refractive index to the delignified template, so that scattering is reduced and transparent wood with favorable optical and mechanical properties is obtained. The structure and functional properties are studied. Laminated transparent plywood is designed to modify mechanical properties. Transparent wood and transparent plywood are demonstrated in applications combining loading-bearing properties with optical performance such as luminescent properties.

The highly porous wood template cell walls are also impregnated with colloidal montmorillonite clay or epoxy/amine solutions to modify the cell wall and form nanostructured biocomposites. The structure and properties of the two materials are investigated; wood/clay hybrids for flame-retardancy and wood/epoxy biocomposites for oil/water separation.

Place, publisher, year, edition, pages
Stockholm: Royal Institute of Technology, 2018. p. 77
Series
TRITA-CBH-FOU ; 2018:1
National Category
Engineering and Technology
Research subject
Materials Science and Engineering; Fibre and Polymer Science
Identifiers
urn:nbn:se:kth:diva-223441 (URN)978-91-7729-671-3 (ISBN)
Public defence
2018-03-07, F3, Lindstedtsvägen 26, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20180221

Available from: 2018-02-21 Created: 2018-02-21 Last updated: 2018-05-31Bibliographically approved
Fu, Q. (2018). Wood Nanotechnology for Strong, Mesoporous, and Hydrophobic Biocomposites for Selective Separation of Oil/Water Mixtures. ACS Nano
Open this publication in new window or tab >>Wood Nanotechnology for Strong, Mesoporous, and Hydrophobic Biocomposites for Selective Separation of Oil/Water Mixtures
2018 (English)In: ACS Nano, ISSN 1936-0851Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [en]

Tremendous efforts have been dedicated to developing effective and eco-friendly approaches for separation of oil–water mixtures. Challenges remain in terms of complex processing, high material cost, low efficiency, and scale-up problems. Inspired by the tubular porosity and hierarchical organization of wood, a strong, mesoporous, and hydrophobic three-dimensional wood structure is created for selective oil/water separation. A delignified wood template with hydrophilic characteristics is obtained by removal of lignin. The delignified wood template is further functionalized by a reactive epoxy–amine system. This wood/epoxy biocomposite reveals hydrophobic/oleophilic functionality and shows oil absorption as high as 15 g/g. The wood/epoxy biocomposite has a compression yield strength and modulus up to 18 and 263 MPa, respectively, at a solid volume fraction of only 12%. This is more than 20 times that of cellulose-based foams/aerogels reconstructed from cellulose nanofibrils. The favorable performance is ascribed to the natural hierarchical honeycomb structure of wood. Oil can be selectively absorbed not only from below but also from above the water surface. High oil/water absorption capacity of both types of wood structures (delignified template and polymer-modified biocomposite) allows for applications in oil/water separation.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
Keywords
composite; delignification; hierarchical; mechanical; wetting; wood modification
National Category
Engineering and Technology
Research subject
Materials Science and Engineering; Fibre and Polymer Science
Identifiers
urn:nbn:se:kth:diva-223437 (URN)10.1021/acsnano.8b00005 (DOI)2-s2.0-85044513449 (Scopus ID)
Note

QC 20180221

Available from: 2018-02-21 Created: 2018-02-21 Last updated: 2018-02-21Bibliographically approved
Fu, Q. & Berglund, L. (2016). Hierarchically structured nanoporous template based on balsa wood. Abstracts of Papers of the American Chemical Society, 251
Open this publication in new window or tab >>Hierarchically structured nanoporous template based on balsa wood
2016 (English)In: Abstracts of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 251Article in journal, Meeting abstract (Other academic) Published
Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2016
National Category
Organic Chemistry
Identifiers
urn:nbn:se:kth:diva-242680 (URN)000431903802347 ()
Note

QC 20190221

Available from: 2019-02-21 Created: 2019-02-21 Last updated: 2019-08-21Bibliographically approved
Fu, Q. & Berglund, L. (2015). Honeycomb like templates prepared from balsa wood. In: ICCM International Conferences on Composite Materials: . Paper presented at 20th International Conference on Composite Materials, ICCM 2015, 19 July 2015 through 24 July 2015. International Committee on Composite Materials
Open this publication in new window or tab >>Honeycomb like templates prepared from balsa wood
2015 (English)In: ICCM International Conferences on Composite Materials, International Committee on Composite Materials , 2015Conference paper, Published paper (Refereed)
Abstract [en]

In the current study, we have used sodium chlorite and sodium hydroxide as extraction solutions, to remove lignin and hemicelluloses from the Balsa (Ochroma Lagopus) wood tissues, without damaging the wood honeycomb architecture. Surface morphologies are studied using scanning electron microscopy (SEM). In addition, sugars analysis of the chemically extracted wood is reported. 

Place, publisher, year, edition, pages
International Committee on Composite Materials, 2015
Keywords
Cell wall, Cellulose, Porous, Wood
National Category
Polymer Technologies Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-236924 (URN)2-s2.0-85053117538 (Scopus ID)
Conference
20th International Conference on Composite Materials, ICCM 2015, 19 July 2015 through 24 July 2015
Note

QC 20181210

Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2018-12-10Bibliographically approved
Fu, Q.Transparent plywood.
Open this publication in new window or tab >>Transparent plywood
(English)Manuscript (preprint) (Other academic)
Keywords
transparent wood; nanotechnology; wood composite; photonics
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-223451 (URN)
Note

QC 20180531

Available from: 2018-02-21 Created: 2018-02-21 Last updated: 2018-05-31Bibliographically approved
Organisations

Search in DiVA

Show all publications