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Publikationer (10 of 20) Visa alla publikationer
Erlandsson, J., Francon, H., Marais, A., Granberg, H. & Wågberg, L. (2019). Cross-Linked and Shapeable Porous 3D Substrates from Freeze-Linked Cellulose Nanofibrils. Paper presented at Symposium on Rational Design of Multifunctional Renewable-Resourced Materials held during the ACS National Meeting, AUG 19-23, 2018, Boston, MA. Biomacromolecules, 20(2), 728-737
Öppna denna publikation i ny flik eller fönster >>Cross-Linked and Shapeable Porous 3D Substrates from Freeze-Linked Cellulose Nanofibrils
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2019 (Engelska)Ingår i: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 20, nr 2, s. 728-737Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Chemically cross-linked highly porous nano cellulose aerogels with complex shapes have been prepared using a freeze-linking procedure that avoids common post activation of cross-linking reactions and freeze-drying. The aerogel shapes ranged from simple geometrical three-dimensional bodies to swirls and solenoids. This was achieved by molding or extruding a periodate oxidized cellulose nanofibril (CNF) dispersion prior to chemical cross-linking in a regular freezer or by reshaping an already prepared aerogel by plasticizing the structure in water followed by reshaping and locking the aerogel into its new shape. The new shapes were most likely retained by new cross-links formed between CNFs brought into contact by the deformation during reshaping. This self-healing ability to form new bonds after plasticization and redrying also contributed to the mechanical resilience of the aerogels, allowing them to be cyclically deformed in the dry state, reswollen with water, and redried with good retention of mechanical integrity. Furthermore, by exploiting the shapeability and available inner structure of the aerogels, a solenoid-shaped aerogel with all surfaces coated with a thin film of conducting polypyrrole was able to produce a magnetic field inside the solenoid, demonstrating electromagnetic properties. Furthermore, by biomimicking the porous interior and stiff exterior of the beak of a toucan bird, a functionalized aerogel was created by applying a 300 mu m thick stiff wax coating on its molded external surfaces. This composite material displayed a 10-times higher elastic modulus compared to that of the plain aerogel without drastically increasing the density. These examples show that it is possible to combine advanced shaping with functionalization of both the inner structure and the surface of the aerogels, radically extending the possible use of CNF aerogels.

Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2019
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:kth:diva-245946 (URN)10.1021/acs.biomac.8b01412 (DOI)000458937200016 ()30394086 (PubMedID)2-s2.0-85057560598 (Scopus ID)
Konferens
Symposium on Rational Design of Multifunctional Renewable-Resourced Materials held during the ACS National Meeting, AUG 19-23, 2018, Boston, MA
Anmärkning

QC 20190312

Tillgänglig från: 2019-03-12 Skapad: 2019-03-12 Senast uppdaterad: 2019-03-12Bibliografiskt granskad
Kaldéus, T., Nordenström, M., Erlandsson, J., Wågberg, L. & Malmström, E. (2019). Redispersibility properties of dried cellulose nanofibrils - influence on structure and mechanical properties.
Öppna denna publikation i ny flik eller fönster >>Redispersibility properties of dried cellulose nanofibrils - influence on structure and mechanical properties
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2019 (Engelska)Ingår i: Artikel i tidskrift (Övrigt vetenskapligt) Epub ahead of print
Nationell ämneskategori
Polymerteknologi Pappers-, massa- och fiberteknik
Identifikatorer
urn:nbn:se:kth:diva-244055 (URN)
Anmärkning

QC 20190218

Tillgänglig från: 2019-02-15 Skapad: 2019-02-15 Senast uppdaterad: 2019-02-18Bibliografiskt granskad
Naderi, A., Koschella, A., Heinze, T., Shih, K. C., Nieh, M. P., Pfeifer, A., . . . Erlandsson, J. (2018). Corrigendum to “Sulfoethylated nanofibrillated cellulose: Production and properties” [Carbohydr. Polym. 169 (2017) 515–523] (S0144861717304101) (10.1016/j.carbpol.2017.04.026)). Carbohydrate Polymers, 179
Öppna denna publikation i ny flik eller fönster >>Corrigendum to “Sulfoethylated nanofibrillated cellulose: Production and properties” [Carbohydr. Polym. 169 (2017) 515–523] (S0144861717304101) (10.1016/j.carbpol.2017.04.026))
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2018 (Engelska)Ingår i: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 179Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The author Ali Naderi regrets the wrong information given with regard to his affiliation. The author would like to apologise for any inconvenience caused.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2018
Nationell ämneskategori
Kemi
Identifikatorer
urn:nbn:se:kth:diva-216809 (URN)10.1016/j.carbpol.2017.09.021 (DOI)000416367900001 ()2-s2.0-85029700169 (Scopus ID)
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Export Date: 24 October 2017; Erratum; CODEN: CAPOD; Correspondence Address: Naderi, A.; Innventia AB, Box 5604, Sweden; email: ali.naderi@innventia.com. QC 20171205

Tillgänglig från: 2017-12-05 Skapad: 2017-12-05 Senast uppdaterad: 2017-12-18Bibliografiskt granskad
Petrou, G., Jansson, R., Hogqvist, M., Erlandsson, J., Wågberg, L., Hedhammar, M. & Crouzier, T. (2018). Genetically Engineered Mucoadhesive Spider Silk. Biomacromolecules, 19(8), 3268-3279
Öppna denna publikation i ny flik eller fönster >>Genetically Engineered Mucoadhesive Spider Silk
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2018 (Engelska)Ingår i: Biomacromolecules, ISSN 1525-7797, E-ISSN 1526-4602, Vol. 19, nr 8, s. 3268-3279Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Mucoadhesion is defined as the adhesion of a material to the mucus gel covering the mucous membranes. The mechanisms controlling mucoadhesion include nonspecific electrostatic interactions and specific interactions between the materials and the mucins, the heavily glycosylated proteins that form the mucus gel. Mucoadhesive materials can be used to develop mucosal wound dressings and noninvasive transmucosal drug delivery systems. Spider silk, which is strong, biocompatible, biodegradable, nontoxic, and lightweight would serve as an excellent base for the development of such materials. Here, we investigated two variants of the partial spider silk protein 4RepCT genetically engineered in order to functionalize them with mucoadhesive properties. The pLys-4RepCT variant was functionalized with six cationically charged lysines, aiming to provide nonspecific adhesion from electrostatic interactions with the anionically charged mucins, while the hGal3-4RepCT variant was genetically fused with the Human Galectin-3 Carbohydrate Recognition Domain which specifically binds the mucin glycans Gal beta 1-3GlcNAc and Gal beta 1-4GlcNAc. First, we demonstrated that coatings, fibers, meshes, and foams can be readily made from both silk variants. Measured by the adsorption of both bovine submaxillary mucin and pig gastric mucin, the newly produced silk materials showed enhanced mucin binding properties compared with materials of wild-type (4RepCT) silk. Moreover, we showed that pLys-4RepCT silk coatings bind mucins through electrostatic interactions, while hGal3-4RepCT silk coatings bind mucins through specific glycan-protein interactions. We envision that the two new mucoadhesive silk variants pLys-4RepCT and hGal3-4RepCT, alone or combined with other biofunctional silk proteins, constitute useful new building blocks for a range of silk protein-based materials for mucosal treatments.

Ort, förlag, år, upplaga, sidor
AMER CHEMICAL SOC, 2018
Nationell ämneskategori
Medicinsk bioteknologi (med inriktning mot cellbiologi (inklusive stamcellsbiologi), molekylärbiologi, mikrobiologi, biokemi eller biofarmaci)
Identifikatorer
urn:nbn:se:kth:diva-234195 (URN)10.1021/acs.biomac.8b00578 (DOI)000441852400011 ()29932649 (PubMedID)2-s2.0-85049259614 (Scopus ID)
Anmärkning

QC 20180920

Tillgänglig från: 2018-09-20 Skapad: 2018-09-20 Senast uppdaterad: 2019-04-13Bibliografiskt granskad
López Durán, V., Erlandsson, J., Wågberg, L. & Larsson, P. A. (2018). Novel, Cellulose-Based, Lightweight, Wet-Resilient Materials with Tunable Porosity, Density, and Strength. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 6(8), 9951-9957
Öppna denna publikation i ny flik eller fönster >>Novel, Cellulose-Based, Lightweight, Wet-Resilient Materials with Tunable Porosity, Density, and Strength
2018 (Engelska)Ingår i: ACS SUSTAINABLE CHEMISTRY & ENGINEERING, ISSN 2168-0485, Vol. 6, nr 8, s. 9951-9957Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Highly porous materials with low density were developed from chemically modified cellulose fibers using solvent-exchange and air drying. Periodate oxidation was initially performed to introduce aldehydes into the cellulose chain, which were then further oxidized to carboxyl groups by chlorite oxidation. Low-density materials were finally achieved by a second periodate oxidation under which the fibers self-assembled into porous fibrous networks. Following a solvent exchange to acetone, these networks could be air-dried without shrinkage. The properties of the materials were tuned by mechanical mixing with a high intensity mixer for different times prior to the second periodate oxidation, which resulted in porosities between 94.4% and 96.3% (i.e., densities between 54 and 82 kg/m(3)). The compressive strength of the materials was between 400 and 1600 kPa in the dry state and between 20 and 50 kPa in the wet state. It was also observed that in the wet state the fiber networks could be compressed up to 80% while still being able to recover their shape. These networks are highly interesting for use in different types of absorption products, and since they also have a high wet integrity, they can be modified with physical methods for different high-value-added end-use applications.

Ort, förlag, år, upplaga, sidor
AMER CHEMICAL SOC, 2018
Nyckelord
Ambient drying, Cellulose, Chemical modification, Chlorite oxidation, Lightweight material, Periodate oxidation
Nationell ämneskategori
Polymerteknologi
Identifikatorer
urn:nbn:se:kth:diva-234192 (URN)10.1021/acssuschemeng.8b01165 (DOI)000441475500049 ()2-s2.0-85049192536 (Scopus ID)
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QC 20181001

Tillgänglig från: 2018-10-01 Skapad: 2018-10-01 Senast uppdaterad: 2018-11-13Bibliografiskt granskad
Erlandsson, J., Pettersson, T., Ingverud, T., Granberg, H., Larsson, P. A., Malkoch, M. & Wågberg, L. (2018). On the mechanism behind freezing-induced chemical crosslinking in ice-templated cellulose nanofibril aerogels. Journal of Materials Chemistry A, 6(40), 19371-19380
Öppna denna publikation i ny flik eller fönster >>On the mechanism behind freezing-induced chemical crosslinking in ice-templated cellulose nanofibril aerogels
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2018 (Engelska)Ingår i: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 6, nr 40, s. 19371-19380Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The underlying mechanism related to freezing-induced crosslinking of aldehyde-containing cellulose nanofibrils (CNFs) has been investigated, and the critical parameters behind this process have been identified. The aldehydes introduced by periodate oxidation allows for formation of hemiacetal bonds between the CNFs provided the fibrils are in sufficiently close contact before the water is removed. This is achieved during the freezing process where the cellulose components are initially separated, and the growth of ice crystals forces the CNFs to come into contact in the thin lamellae between the ice crystals. The crosslinked 3-D structure of the CNFs can subsequently be dried under ambient conditions after solvent exchange and still maintain a remarkably low density of 35 kg m-3, i.e. a porosity greater than 98%. A lower critical amount of aldehydes, 0.6 mmol g-1, was found necessary in order to generate a crosslinked 3-D CNF structure of sufficient strength not to collapse during the ambient drying. The chemical stability of the 3-D structure can be further enhanced by converting the hemiacetals to acetals by treatment with an alcohol under acidic conditions.

Ort, förlag, år, upplaga, sidor
Royal Society of Chemistry, 2018
Nyckelord
Aerogels, Aldehydes, Cellulose, Chemical stability, Crosslinking, Freezing, Nanofibers, Acidic conditions, Ambient conditions, Cellulose nanofibrils (CNFs), Chemical cross-linking, Freezing process, Lower critical, Periodate oxidation, Solvent exchanges, Ice
Nationell ämneskategori
Polymerteknologi
Identifikatorer
urn:nbn:se:kth:diva-247488 (URN)10.1039/c8ta06319b (DOI)000448413100008 ()2-s2.0-85055128762 (Scopus ID)
Anmärkning

QC 20190405

Tillgänglig från: 2019-04-05 Skapad: 2019-04-05 Senast uppdaterad: 2019-05-22Bibliografiskt granskad
Pettersson, T., Erlandsson, J., Larsson, P. & Wågberg, L. (2018). On the mechanism of freeze-induced crosslinking of aerogels made from periodate-oxidised cellulose nanofibrils. 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. Abstract of Papers of the American Chemical Society, 255
Öppna denna publikation i ny flik eller fönster >>On the mechanism of freeze-induced crosslinking of aerogels made from periodate-oxidised cellulose nanofibrils
2018 (Engelska)Ingår i: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Artikel i tidskrift, Meeting abstract (Övrigt vetenskapligt) Published
Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2018
Nationell ämneskategori
Kemi
Identifikatorer
urn:nbn:se:kth:diva-240167 (URN)000435537703096 ()
Konferens
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Anmärkning

QC 20190111

Tillgänglig från: 2019-01-11 Skapad: 2019-01-11 Senast uppdaterad: 2019-01-11Bibliografiskt granskad
Wågberg, L., Hamedi, M., Marais, A., Nyström, G., Francon, H., Granberg, H. & Erlandsson, J. (2018). The use of the layer-by-layer technology and low density networks of cellulose nanofibrils for preparing new materials for energy storage. 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. Abstract of Papers of the American Chemical Society, 255
Öppna denna publikation i ny flik eller fönster >>The use of the layer-by-layer technology and low density networks of cellulose nanofibrils for preparing new materials for energy storage
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2018 (Engelska)Ingår i: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 255Artikel i tidskrift, Meeting abstract (Övrigt vetenskapligt) Published
Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2018
Nationell ämneskategori
Kemi
Identifikatorer
urn:nbn:se:kth:diva-240172 (URN)000435537702661 ()
Konferens
255th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nexus of Food, Energy, and Water, MAR 18-22, 2018, New Orleans, LA
Anmärkning

QC 20181214

Tillgänglig från: 2018-12-14 Skapad: 2018-12-14 Senast uppdaterad: 2018-12-14Bibliografiskt granskad
Larsson, P., Erlandsson, J., Lopez Duran, V., Henschen, J., Tchang Cervin, N., Al-Ansari, Z., . . . Wågberg, L. (2017). Crosslinking as a facilitator for novel (nano)cellulose-based applications. Paper presented at 253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA. Abstract of Papers of the American Chemical Society, 253
Öppna denna publikation i ny flik eller fönster >>Crosslinking as a facilitator for novel (nano)cellulose-based applications
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2017 (Engelska)Ingår i: Abstract of Papers of the American Chemical Society, ISSN 0065-7727, Vol. 253Artikel i tidskrift, Meeting abstract (Övrigt vetenskapligt) Published
Ort, förlag, år, upplaga, sidor
American Chemical Society (ACS), 2017
Nationell ämneskategori
Kemi
Identifikatorer
urn:nbn:se:kth:diva-243608 (URN)000430568503328 ()
Konferens
253rd National Meeting of the American-Chemical-Society (ACS) on Advanced Materials, Technologies, Systems, and Processes, APR 02-06, 2017, San Francisco, CA
Anmärkning

QC 20190206

Tillgänglig från: 2019-02-06 Skapad: 2019-02-06 Senast uppdaterad: 2019-02-06Bibliografiskt granskad
Naderi, A., Larsson, P. T., Stevanic, J. S., Lindström, T. & Erlandsson, J. (2017). Effect of the size of the charged group on the properties of alkoxylated NFCs. Cellulose (London), 24(3), 1307-1317
Öppna denna publikation i ny flik eller fönster >>Effect of the size of the charged group on the properties of alkoxylated NFCs
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2017 (Engelska)Ingår i: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, nr 3, s. 1307-1317Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The impact of the size of the charged group on the properties of alkoxylated NFC was studied by two chloroalkyl acid reagents. It was found that the employment of the larger 2-chloropropionic acid reagent leads to improved properties, e.g. higher fraction of nano-sized materials, and significantly better redispersion as compared to when the smaller monochloroacetic acid was employed. The differences in the impacts of the different reagents were hypothesized to be due to a more efficient disruption of the cohesion between the nanofibrils when a larger charged group was employed.

Ort, förlag, år, upplaga, sidor
Springer, 2017
Nyckelord
Nanofibrillated cellulose (NFC), Alkoxylation, Redispersion, Degree of fibrillation, Barrier properties, NMR
Nationell ämneskategori
Polymerteknologi
Identifikatorer
urn:nbn:se:kth:diva-242318 (URN)10.1007/s10570-017-1190-4 (DOI)000395067400010 ()2-s2.0-85008622734 (Scopus ID)
Anmärkning

QC 20190130

Tillgänglig från: 2019-01-30 Skapad: 2019-01-30 Senast uppdaterad: 2019-01-30Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0003-1874-2187

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