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Feng, Zhaoxuan
Publications (8 of 8) Show all publications
Feng, Z., Hakkarainen, M., Gruetzmacher, H., Chiappone, A. & Sangermano, M. (2019). Photocrosslinked Chitosan Hydrogels Reinforced with Chitosan-Derived no-Graphene Oxide. Macromolecular Chemistry and Physics, 220(13), Article ID 1900174.
Open this publication in new window or tab >>Photocrosslinked Chitosan Hydrogels Reinforced with Chitosan-Derived no-Graphene Oxide
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2019 (English)In: Macromolecular Chemistry and Physics, ISSN 1022-1352, E-ISSN 1521-3935, Vol. 220, no 13, article id 1900174Article in journal (Refereed) Published
Abstract [en]

Chitosan and chitosan-derived nano-graphene oxide carbon dots are successfully methacrylated and utilized for the fabrication of photocurable hydrogels. The addition of the nano-graphene oxide (nGO) does not significantly delay the polymer network build-up, but significantly reduces the storage modulus of the crosslinked network, with important detrimental effects on the mechanical performance. By replacing nGO with methacrylated M-nGO, the mechanical performance of the crosslinked polymer network is improved with an increase of the storage modulus as a function of increasing the M-nGO content in the photocurable formulation.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2019
Keywords
chitosan hydrogels, graphene oxide, photopolymerization
National Category
Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-255769 (URN)10.1002/macp.201900174 (DOI)000477776900004 ()2-s2.0-85066467153 (Scopus ID)
Note

QC 20190809

Available from: 2019-08-09 Created: 2019-08-09 Last updated: 2019-08-09Bibliographically approved
Feng, Z., Takahiro, D., Odelius, K., Hakkarainen, M., Tadahisa, I. & Albertsson, A.-C. (2019). Recyclable fully biobased chitosan adsorbents spray-dried in one-pot to microscopic size and enhanced adsorption capacity. Biomacromolecules, 20(5), 1956-1964
Open this publication in new window or tab >>Recyclable fully biobased chitosan adsorbents spray-dried in one-pot to microscopic size and enhanced adsorption capacity
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2019 (English)In: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 20, no 5, p. 1956-1964Article in journal (Refereed) Published
Abstract [en]

A facile one-pot spray-drying process was developed for fabrication and in-situ crosslinking of chitosan microspheres to improve the adsorption capacity by microscopic design. A fully biobased nature was achieved by utilizing genipin (GP) as a crosslinking agent and chitosan derived nano-graphene oxide (nGO) as a property tuner. The produced chitosan microspheres were further proven as powerful adsorbents for common wastewater contaminants such as anionic dyes and pharmaceutical contaminants, here modelled by methyl orange (MO) and diclofenac sodium (DCF). By regulating the amount of GP and nGO, as well as by controlling the process parameters including the spraydrying inlet temperature and post-heat treatment, the surface morphology, size, zeta potential and adsorption efficiency of the microspheres could be tuned accordingly. The adsorption efficiency for MO and DCF reached 98.9 and 100 %, respectively. The microspheres retained high DCF adsorption efficiency after six adsorption and desorption cycles and the recyclability was improved by incorporated nGO. The fabricated microspheres, thus, have great potential as reusable and eco-friendly adsorbents.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019
Keywords
In-situ crosslinking, microspheres, chitosan, spray drying, genipin, biobased, recyclable
National Category
Polymer Chemistry
Research subject
Fibre and Polymer Science
Identifiers
urn:nbn:se:kth:diva-248442 (URN)10.1021/acs.biomac.9b00186 (DOI)000468120800012 ()2-s2.0-85064830922 (Scopus ID)
Note

QC 20190410

Available from: 2019-04-09 Created: 2019-04-09 Last updated: 2019-11-11Bibliographically approved
Feng, Z., Odelius, K., Rajarao, G. K. & Hakkarainen, M. (2018). Microwave carbonized cellulose for trace pharmaceutical adsorption. Chemical Engineering Journal, 346, 557-566
Open this publication in new window or tab >>Microwave carbonized cellulose for trace pharmaceutical adsorption
2018 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 346, p. 557-566Article in journal (Refereed) Published
Abstract [en]

A promising sustainable strategy to valorize cellulose to high-value adsorbents for trace pharmaceuticals, like diclofenac sodium (DCF), in the water is demonstrated. Carbon nanospheres (CN) as the DCF adsorbent were derived from cellulose through a one-pot microwave-assisted hydrothermal carbonization method. CN exhibited efficient DCF removal (100% removal of 0.001 mg/mL DCF in 30 s and 59% removal of 0.01 mg/mL DCF in 1 h). The adsorption kinetics and isotherm data were well-fitted with the pseudo-second-order kinetic model and Langmuir model, respectively. The adsorption process was endothermic and spontaneous as confirmed by the thermodynamic parameters. Multiple characterization techniques including SEM/EDS, FTIR, FTIR-imaging and zeta potential were applied to qualitatively investigate the adsorption process. π-π stacking and hydrogen bonding were proposed as the dominant adsorption interactions. CN also demonstrated effective adsorption capacity towards three other commonly-detected contaminants in the wastewater including ketoprofen (KP), benzophenone (BZP), and diphenylamine (DPA), each bearing partial structural similarity with DCF. The affinity of the contaminants towards CN followed the order DPA > BZP > DCF > KP, which could be explained by the different configurations and chemical units. It was speculated that for DCF and KP, the steric hindrance and electrostatic repulsion produced by dissociated carboxyl groups can impede the adsorption process as compared to DPA and BZP. This methodology could offer further insights into the drug adsorption on the cellulose-derived carbon adsorbents and the use of bioderived carbons for treatment of wastewaters contaminated with pharmaceuticals.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Adsorption, Carbon nanosphere, Carbonization, Cellulose, Diclofenac, Microwave
National Category
Chemical Sciences Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-227509 (URN)10.1016/j.cej.2018.04.014 (DOI)000432878400057 ()2-s2.0-85045434362 (Scopus ID)
Note

QC 20180518

Available from: 2018-05-18 Created: 2018-05-18 Last updated: 2019-04-10Bibliographically approved
Feng, Z., Odelius, K. & Hakkarainen, M. (2018). Tunable chitosan hydrogels for adsorption: Property control by biobased modifiers. Carbohydrate Polymers, 196, 135-145
Open this publication in new window or tab >>Tunable chitosan hydrogels for adsorption: Property control by biobased modifiers
2018 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 196, p. 135-145Article in journal (Refereed) Published
Abstract [en]

A sustainable strategy to fabricate chitosan-based composite hydrogels with tunable properties and controllable adsorption capacity of trace pharmaceuticals was demonstrated. Two biobased modifiers were utilized to tune the properties, nano-graphene oxide (nGO) derived from chitosan via microwave-assisted carbonization and oxidation, and genipin as the crosslinking agent. An increase in genipin content facilitated an increase in the degree of crosslinking as shown by improved storage modulus and decreased swelling ratio. Increasing nGO content changed the surface microtopography of the hydrogel which correlated with the surface wettability. nGO also catalyzed the genipin-crosslinking reaction. The hydrogel was further shown to be an effective adsorbent for a common anti-inflammatory drug, diclofenac sodium (DCF), with the removal efficiency ranging from 91 to 100% after 48 h. DCF adsorption efficiency could be tuned through simple alteration of nGO and genipin concentration, which provides promising potential for this environmental-friendly adsorbent in removal of DCF from pharmaceutical waste water.

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
Keywords
Adsorbent, Biobased, Chitosan, Graphene oxide, Hydrogel, Pharmaceutical
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-228696 (URN)10.1016/j.carbpol.2018.05.029 (DOI)000436571600016 ()2-s2.0-85047074150 (Scopus ID)
Note

QC 20180530

Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2019-04-10Bibliographically approved
Feng, Z., Simeone, A., Odelius, K. & Hakkarainen, M. (2017). Biobased Nanographene Oxide Creates Stronger Chitosan Hydrogels with Improved Adsorption Capacity for Trace Pharmaceuticals. ACS Sustainable Chemistry & Engineering, 5(12), 11525-11535
Open this publication in new window or tab >>Biobased Nanographene Oxide Creates Stronger Chitosan Hydrogels with Improved Adsorption Capacity for Trace Pharmaceuticals
2017 (English)In: ACS Sustainable Chemistry & Engineering, ISSN 2168-0485, Vol. 5, no 12, p. 11525-11535Article in journal (Refereed) Published
Abstract [en]

A promising green strategy for the fabrication of fully biobased chitosan adsorbents for wastewater purification is presented. Nanographene oxide (nGO)-type carbon dots were derived from chitosan (nGOCS) or from cellulose (nGOCL) through a two-step process including microwave-assisted hydrothermal carbonization and oxidation. Finally, nGO were evaluated as biobased property enhancers in chitosan hydrogel adsorbents. Macroporous chitosan hydrogels were synthesized by cross-linking with genipin, and the incorporation of nGO into these hydrogels was shown to facilitate the cross-linking reaction leading to more robust 3D cross-linked networks. This was evidenced by the increased storage modulus and by the swelling ratio that decreased from 5.7 for pristine chitosan hydrogel to 2.6 for hydrogel with 5 mg/mL nGOCS and 3.3 for hydrogel with 5 mg/mL nGOCL. As a further proof of the concept the hydrogels were shown to be effective adsorbent for the common anti-inflammatory drug diclofenac sodium (DCF). Here, the addition of nGO promoted the DCF adsorption process leading to 100% removal of DCF after only 5 h. The synergistic effect of electrostatic interactions, hydrogen bonding, and pi-pi stacking could explain the high adsorption of DCF on the hydrogels. The developed biobased CS/nGO hydrogels are thus promising adsorbents with great potential for purification of trace pharmaceuticals from wastewater.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017
Keywords
Graphene oxide, Carbon dot, Hydrogel, Diclofenac sodium, Genipin, Microwave, Waste water purification, Adsorbent
National Category
Polymer Chemistry Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-220462 (URN)10.1021/acssuschemeng.7b02809 (DOI)000417341900044 ()2-s2.0-85042358833 (Scopus ID)
Note

QC 20171221

Available from: 2017-12-21 Created: 2017-12-21 Last updated: 2019-04-10Bibliographically approved
Xu, H., Wu, D., Yang, X., Feng, Z., Adolfsson, K. H., Xie, L. & Hakkarainen, M. (2016). Enhancing the function of graphene oxide nanosheets by crystallization control: Unexpected harvest of strength, ductility and thermal stability for poly(lactic acid) barrier films. Abstracts of Papers of the American Chemical Society, 251
Open this publication in new window or tab >>Enhancing the function of graphene oxide nanosheets by crystallization control: Unexpected harvest of strength, ductility and thermal stability for poly(lactic acid) barrier films
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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-242706 (URN)000431903802274 ()
Note

QC 20190220

Available from: 2019-02-20 Created: 2019-02-20 Last updated: 2019-08-21Bibliographically approved
Pettersson, T., Feng, Z., Hassanzadeh, S. & Hakkarainen, M. (2016). Mixed micelles of chemically modified Pluronic as drug delivery system. Abstracts of Papers of the American Chemical Society, 251
Open this publication in new window or tab >>Mixed micelles of chemically modified Pluronic as drug delivery system
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-242699 (URN)000431903805693 ()
Note

QC 20190221

Available from: 2019-02-21 Created: 2019-02-21 Last updated: 2019-08-21Bibliographically approved
Feng, Z., Hassanzadeh, S., Pettersson, T. & Hakkarainen, M. (2016). Multifunctional cancer-targeting strategy for encapsulating doxorubicin by folate-onjugated and quercetin-anchored pluronic mixed micelle systems. Abstracts of Papers of the American Chemical Society, 251
Open this publication in new window or tab >>Multifunctional cancer-targeting strategy for encapsulating doxorubicin by folate-onjugated and quercetin-anchored pluronic mixed micelle systems
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-242678 (URN)000431905707013 ()
Note

QC 20190222

Available from: 2019-02-22 Created: 2019-02-22 Last updated: 2019-08-21Bibliographically approved
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