1
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Li H, Asta N, Wang Z, Pettersson T, Wågberg L. Reevaluation of the adhesion between cellulose materials using macro spherical beads and flat model surfaces. Carbohydr Polym 2024; 332:121894. [PMID: 38431407 DOI: 10.1016/j.carbpol.2024.121894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/25/2024] [Accepted: 01/30/2024] [Indexed: 03/05/2024]
Abstract
Interactions between dry cellulose were studied using model systems, cellulose beads, and cellulose films, using custom-built contact adhesion testing equipment. Depending on the configuration of the substrates in contact, Polydimethylsiloxane (PDMS) film, cellulose films spin-coated either on PDMS or glass, the interaction shows three distinct processes. Firstly, molecular interlocking is formed between cellulose and cellulose when there is a soft PDMS thin film backing the cellulose film. Secondly, without backing, no initial attraction force between the surfaces is observed. Thirdly, a significant force increase, ∆F, is observed during the retraction process for cellulose on glass, and there is a maximum in ∆F when the retraction rate is increased. This is due to the kinetics of a contacting process occurring in the interaction zone between the surfaces caused by an interdigitation of a fine fibrillar structure at the nano-scale, whereas, for the spin-coated cellulose surfaces on the PDMS backing, there is a more direct adhesive failure. The results have generated understanding of the interaction between cellulose-rich materials, which helps design new, advanced cellulose-based materials. The results also show the complexity of the interaction between these surfaces and that earlier mechanisms, based on macroscopic material testing, are simply not adequate for molecular tailoring.
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Affiliation(s)
- Hailong Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, 116024 Dalian, China; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden.
| | - Nadia Asta
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden
| | - Zhen Wang
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden
| | - Torbjörn Pettersson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; Wallenberg Wood Science Centre, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 10044 Stockholm, Sweden.
| | - Lars Wågberg
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; Wallenberg Wood Science Centre, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 10044 Stockholm, Sweden.
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2
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Benselfelt T, Cinar Ciftci G, Wågberg L, Wohlert J, Hamedi MM. Entropy Drives Interpolymer Association in Water: Insights into Molecular Mechanisms. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:6718-6729. [PMID: 38517289 PMCID: PMC10993416 DOI: 10.1021/acs.langmuir.3c02978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 02/28/2024] [Accepted: 03/04/2024] [Indexed: 03/23/2024]
Abstract
Interpolymer association in aqueous solutions is essential for many industrial processes, new materials design, and the biochemistry of life. However, our understanding of the association mechanism is limited. Classical theories do not provide molecular details, creating a need for detailed mechanistic insights. This work consolidates previous literature with complementary isothermal titration calorimetry (ITC) measurements and molecular dynamics (MD) simulations to investigate molecular mechanisms to provide such insights. The large body of ITC data shows that intermolecular bonds, such as ionic or hydrogen bonds, cannot drive association. Instead, polymer association is entropy-driven due to the reorganization of water and ions. We propose a unifying entropy-driven association mechanism by generalizing previously suggested polyion association principles to include nonionic polymers, here termed polydipoles. In this mechanism, complementary charge densities of the polymers are the common denominators of association, for both polyions and polydipoles. The association of the polymers results mainly from two processes: charge exchange and amphiphilic association. MD simulations indicate that the amphiphilic assembly alone is enough for the initial association. Our proposed mechanism is a step toward a molecular understanding of the formation of complexes between synthetic and biological polymers under ambient or biological conditions.
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Affiliation(s)
- Tobias Benselfelt
- Department of Fibre and Polymer
Technology, School of Engineering Sciences in Chemistry, Biotechnology
and Health, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Goksu Cinar Ciftci
- Department of Fibre and Polymer
Technology, School of Engineering Sciences in Chemistry, Biotechnology
and Health, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Lars Wågberg
- Department of Fibre and Polymer
Technology, School of Engineering Sciences in Chemistry, Biotechnology
and Health, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Jakob Wohlert
- Department of Fibre and Polymer
Technology, School of Engineering Sciences in Chemistry, Biotechnology
and Health, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Mahiar Max Hamedi
- Department of Fibre and Polymer
Technology, School of Engineering Sciences in Chemistry, Biotechnology
and Health, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
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3
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Asta N, Reid MS, Pettersson T, Wågberg L. The Use of Model Cellulose Materials for Studying Molecular Interactions at Cellulose Interfaces. ACS Macro Lett 2023; 12:1530-1535. [PMID: 37910654 PMCID: PMC10666532 DOI: 10.1021/acsmacrolett.3c00578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/22/2023] [Accepted: 10/26/2023] [Indexed: 11/03/2023]
Abstract
Despite extensive research on biobased and fiber-based materials, fundamental questions regarding the molecular processes governing fiber-fiber interactions remain unanswered. In this study, we introduce a method to examine and clarify molecular interactions within fiber-fiber joints using precisely characterized model materials, i.e., regenerated cellulose gel beads with nanometer-smooth surfaces. By physically modifying these materials and drying them together to create model joints, we can investigate the mechanisms responsible for joining cellulose surfaces and how this affects adhesion in both dry and wet states through precise separation measurements. The findings reveal a subtle balance in the joint formation, influencing the development of nanometer-sized structures at the contact zone and likely inducing built-in stresses in the interphase. This research illustrates how model materials can be tailored to control interactions between cellulose-rich surfaces, laying the groundwork for future high-resolution studies aimed at creating stiff, ductile, and/or tough joints between cellulose surfaces and to allow for the design of high-performance biobased materials.
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Affiliation(s)
- Nadia Asta
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
| | - Michael S. Reid
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
- RISE
Research Institute of Sweden, SE-114 86 Stockholm, Sweden
| | - Torbjörn Pettersson
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
| | - Lars Wågberg
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
- Wallenberg
Wood Science Centre, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 10044 Stockholm, Sweden
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4
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Benselfelt T, Kummer N, Nordenström M, Fall AB, Nyström G, Wågberg L. The Colloidal Properties of Nanocellulose. CHEMSUSCHEM 2023; 16:e202201955. [PMID: 36650954 DOI: 10.1002/cssc.202201955] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/16/2023] [Indexed: 06/17/2023]
Abstract
Nanocelluloses are anisotropic nanoparticles of semicrystalline assemblies of glucan polymers. They have great potential as renewable building blocks in the materials platform of a more sustainable society. As a result, the research on nanocellulose has grown exponentially over the last decades. To fully utilize the properties of nanocelluloses, a fundamental understanding of their colloidal behavior is necessary. As elongated particles with dimensions in a critical nanosize range, their colloidal properties are complex, with several behaviors not covered by classical theories. In this comprehensive Review, we describe the most prominent colloidal behaviors of nanocellulose by combining experimental data and theoretical descriptions. We discuss the preparation and characterization of nanocellulose dispersions, how they form networks at low concentrations, how classical theories cannot describe their behavior, and how they interact with other colloids. We then show examples of how scientists can use this fundamental knowledge to control the assembly of nanocellulose into new materials with exceptional properties. We hope aspiring and established researchers will use this Review as a guide.
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Affiliation(s)
- Tobias Benselfelt
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore, Singapore
| | - Nico Kummer
- Laboratory for Cellulose & Wood Materials, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
- Department of Health Sciences and Technology, ETH Zürich, 8092, Zürich, Switzerland
| | - Malin Nordenström
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
| | | | - Gustav Nyström
- Laboratory for Cellulose & Wood Materials, Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600, Dübendorf, Switzerland
- Department of Health Sciences and Technology, ETH Zürich, 8092, Zürich, Switzerland
| | - Lars Wågberg
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
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5
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Efraim Alexakis A, Rosella Telaretti Leggieri M, Wågberg L, Malmström E, Benselfelt T. Nanolatex architectonics: Influence of cationic charge density and size on their adsorption onto surfaces with a 2D or 3D distribution of anionic groups. J Colloid Interface Sci 2023; 634:610-620. [PMID: 36549209 DOI: 10.1016/j.jcis.2022.12.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 12/01/2022] [Accepted: 12/08/2022] [Indexed: 12/15/2022]
Abstract
HYPOTHESIS It is theoretically predicted and hypothesized that the charge density and size of spherical nanoparticles are the key factors for their adsorption onto oppositely charged surfaces. It is also hypothesized that the morphology and charge of the surface are of great importance. In-plane 2D (silica) or a volumetric 3D (regenerated TEMPO-oxidized cellulose model surfaces) distribution of charged groups is expected to influence charge compensation and, thus, the adsorption behavior. EXPERIMENTS In this work, self-stabilized nanolatexes with a range of cationic charge densities and sizes were synthesized through reversible addition - fragmentation chain-transfer (RAFT) polymerization coupled with polymerization-induced self-assembly (PISA). Their adsorption onto silica and anionic cellulose model surfaces was investigated using stagnation point adsorption reflectometry (SPAR) and quartz crystal microbalance with dissipation (QCM-D). FINDINGS Experiments and theory agree and show that the size of the nanolatex and the difference in charge density compared to the substrate determine the charge compensation and, thus, the surface coverage. Highly charged or large nanolatexes overcompensate the surface charge of non-porous substrates leading to a significant repulsive zone where other particles cannot adsorb. For porous substrates like cellulose, the vertical distribution of charged groups in the 3D volume prevents overcompensation and thus increases the adsorption. This systematic study investigates the isolated effect of surface charge and size and paves the way for on-demand particles specifically designed for a surface with particular characteristics.
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Affiliation(s)
- Alexandros Efraim Alexakis
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, Division of Coating Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden; Wallenberg Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Maria Rosella Telaretti Leggieri
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, Division of Coating Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Lars Wågberg
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, Division of Fibre Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Eva Malmström
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, Division of Coating Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden; Wallenberg Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Tobias Benselfelt
- KTH Royal Institute of Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Fibre and Polymer Technology, Division of Fibre Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden; School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore.
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6
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Li J, Mathew AP. Effect of decoration route on the nanomechanical, adhesive, and force response of nanocelluloses-An in situ force spectroscopy study. PLoS One 2023; 18:e0279919. [PMID: 36595547 PMCID: PMC9810197 DOI: 10.1371/journal.pone.0279919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/15/2022] [Indexed: 01/04/2023] Open
Abstract
Although cellulose derivatives are widely applied in high-tech materials, the relation between their force responses and their surface chemical properties in a biological environment as a function of pH is unknown. Here, interaction forces of surface modified cellulose nanocrystals (CNCs), lignin residual cellulose nanocrystals (LCNCs), and 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized cellulose nanofibres (TCNFs) with OSO3-, COO- and lignin chemical groups were measured using in situ peak force quantitative nanomechanical mapping and force spectroscopy in salt solution at two pH values. We found that the forces acting between the tip and CNC or LCNC are steric dominated showing long range and slow decay as a result of their low surface charge density. High Mw lignin contributed to the increased repulsion range for LCNCs compared to CNCs. The repulsion measured for TCNFs at the very short range was electrostatic force dominating showing a steep decay attributed to its high surface charge density. In the case of TCNFs, electrostatic double layer force was also evidenced by the attraction measured at secondary minima. In all the three cases the electro steric interactions are pH dependent. Dissipation maps verified that the force behavior for each material was related to structural conformation restriction of the groups at compression. The slow decayed repulsion of CNCs or LCNCs is related to a weak restriction of conformational change due to small surface groups or high molecular weight bound polymers forming flat layers, whereas the steep repulsion of TCNFs is attributed to a strong conformation restriction of carboxylic groups occurred by forming extended structure. Our results suggest that the force responses of the materials were dominated by surface charges and structural differences. TCNFs showed superior nanomechanical and repulsion properties over CNCs or LCNCs at neutral pH.
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Affiliation(s)
- Jing Li
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden
- * E-mail:
| | - Aji P. Mathew
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden
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7
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Zhang X, Lei C, Li Z, Zhang A, Zhao W, Zhang W, Xu J, Guo P. Effect of Cellulose Nanofibrils on the Physical Properties and Frost Resistance of Pervious Concrete. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7906. [PMID: 36431394 PMCID: PMC9695371 DOI: 10.3390/ma15227906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 10/26/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Pervious concrete has good water permeability and, if used in construction, it can alleviate the heat island effect. However, its low strength and poor durability are major obstacles to its use. This study shows that nano-reinforced pervious concrete created by incorporating cellulose nanofibrils (CNFs) can improve the physical properties and increase the durability of pervious concrete. CNFs were added to the concrete mix in proportions ranging from 0.05% to 0.2% by weight of binder. The additions were found to alter matrix rheology. The hydration kinetics of matrix with differing CNF contents were compared and analyzed. The experimental results show the addition of CNFs delayed peak heat flow and maximum cumulative heat. The 28 d compressive strength of pervious concrete increased by up to 26.5% and 28 d flexural strength by up to 25.8% with the addition of 0.05-0.2% CNFs. Addition of 0.1% and 0.2% CNFs increased water permeability. Addition of 0.05-0.15% CNFs decreased mass loss by 73.2-83.7% after 150 freeze-thaw cycles, which corresponded to an increase in frost resistance. Denser matrices and stronger interfacial transition zones were observed using scanning electron microscopy when 0.05-0.2% CNFs were added.
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Affiliation(s)
- Xu Zhang
- School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Chengbang Lei
- School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China
- Engineering Research Institute of Appraisal and Strengthening of Shandong Jianzhu University Co., Ltd., Jinan 250014, China
| | - Zhi Li
- School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Aiqin Zhang
- School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Wanfeng Zhao
- School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Wei Zhang
- School of Transportation Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
| | - Jiarong Xu
- Engineering Research Institute of Appraisal and Strengthening of Shandong Jianzhu University Co., Ltd., Jinan 250014, China
| | - Panpan Guo
- Engineering Research Institute of Appraisal and Strengthening of Shandong Jianzhu University Co., Ltd., Jinan 250014, China
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8
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Effect of ion species and ionic strength on the properties of underwater oleophobic (PDDA/PSS)4 polyelectrolyte multilayer film. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-04976-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Li H, Roth SV, Freychet G, Zhernenkov M, Asta N, Wågberg L, Pettersson T. Structure Development of the Interphase between Drying Cellulose Materials Revealed by In Situ Grazing-Incidence Small-Angle X-ray Scattering. Biomacromolecules 2021; 22:4274-4283. [PMID: 34541856 PMCID: PMC8512666 DOI: 10.1021/acs.biomac.1c00845] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 09/07/2021] [Indexed: 11/29/2022]
Abstract
The nano- to microscale structures at the interface between materials can define the macroscopic material properties. These structures are extremely difficult to investigate for complex material systems, such as cellulose-rich materials. The development of new model cellulose materials and measuring techniques has opened new possibilities to resolve this problem. We present a straightforward approach combining micro-focusing grazing-incidence small-angle X-ray scattering and atomic force microscopy (AFM) to investigate the structural rearrangements of cellulose/cellulose interfaces in situ during drying. Based on the results, we propose that molecular interdiffusion and structural rearrangement play a major role in the development of the properties of the cellulose/cellulose interphase; this model is representative of the development of the properties of joint/contact points between macroscopic cellulose fibers.
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Affiliation(s)
- Hailong Li
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
- Department
of Physics, AlbaNova University Center, Stockholm University, Stockholm 10691, Sweden
| | - Stephan V. Roth
- Deutsches
Elektronen-Synchrotron (DESY), Notkestr. 85, Hamburg 22607, Germany
| | - Guillaume Freychet
- National
Synchrotron Light Source II, Brookhaven
National Laboratory, Upton, New York 11973, United States
| | - Mikhail Zhernenkov
- National
Synchrotron Light Source II, Brookhaven
National Laboratory, Upton, New York 11973, United States
| | - Nadia Asta
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
| | - Lars Wågberg
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
- Wallenberg
Wood Science Centre, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm 10044, Sweden
| | - Torbjörn Pettersson
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
- Wallenberg
Wood Science Centre, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm 10044, Sweden
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10
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Maddalena L, Benselfelt T, Gomez J, Hamedi MM, Fina A, Wågberg L, Carosio F. Polyelectrolyte-Assisted Dispersions of Reduced Graphite Oxide Nanoplates in Water and Their Gas-Barrier Application. ACS APPLIED MATERIALS & INTERFACES 2021; 13:43301-43313. [PMID: 34474558 PMCID: PMC8447182 DOI: 10.1021/acsami.1c08889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 08/05/2021] [Indexed: 06/13/2023]
Abstract
Dispersion of graphene and related materials in water is needed to enable sustainable processing of these 2D materials. In this work, we demonstrate the capability of branched polyethylenimine (BPEI) and polyacrylic acid (PAA) to stabilize reduced graphite oxide (rGO) dispersions in water. Atomic force microscopy colloidal probe measurements were carried out to investigate the interaction mechanisms between rGO and the polyelectrolytes (PEs). Our results show that for positive PEs, the interaction appears electrostatic, originating from the weak negative charge of graphene in water. For negative PEs, however, van der Waals forces may result in the formation of a PE shell on rGO. The PE-stabilized rGO dispersions were then used for the preparation of coatings to enhance gas barrier properties of polyethylene terephthalate films using the layer-by-layer self-assembly. Ten bilayers of rGOBPEI/rGOPAA resulted in coatings with excellent barrier properties as demonstrated by oxygen transmission rates below detection limits [<0.005 cm3/(m2 day atm)]. The observed excellent performance is ascribed to both the high density of the deposited coating and its efficient stratification. These results can enable the design of highly efficient gas barrier solutions for demanding applications, including oxygen-sensitive pharmaceutical products or flexible electronic devices.
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Affiliation(s)
- Lorenza Maddalena
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy
| | - Tobias Benselfelt
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
| | - Julio Gomez
- AVANZARE
Innovacion Tecnologica S.L., 26370 Navarrete, La Rioja, Spain
| | - Mahiar Max Hamedi
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
| | - Alberto Fina
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy
| | - Lars Wågberg
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden
| | - Federico Carosio
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Campus, Viale Teresa Michel 5, 15121 Alessandria, Italy
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11
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On the interaction between PEDOT:PSS and cellulose: Adsorption mechanisms and controlling factors. Carbohydr Polym 2021; 260:117818. [PMID: 33712162 DOI: 10.1016/j.carbpol.2021.117818] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/10/2021] [Accepted: 02/10/2021] [Indexed: 02/06/2023]
Abstract
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a conducting polymer frequently used with cellulose, to develop advanced electronic materials. To understand the fundamental interactions between cellulose and PEDOT:PSS, a quartz crystal microbalance with dissipation (QCM-D) was used to study the adsorption of PEDOT:PSS onto model films of cellulose-nanofibrils (CNFs) and regenerated cellulose. The results show that PEDOT:PSS adsorbs spontaneously onto anionically charged cellulose wherein the adsorbed amount can be tuned by altering solution parameters such as pH, ionic strength and counterion to the charges on the CNF. Temperature-dependent QCM-D studies indicate that an entropy gain is the driving force for adsorption, as the adsorbed amount of PEDOT:PSS increased with increasing temperature. Colloidal probe AFM, in accordance with QCM-D results, also showed an increased adhesion between cellulose and PEDOT:PSS at low pH. AFM images show bead-like PEDOT:PSS particles on CNF surfaces, while no such organization was observed on the regenerated cellulose surfaces. This work provides insight into the interaction of PEDOT:PSS/cellulose that will aid in the design of sustainable electronic devices.
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12
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Lee H, Stryutsky A, Mahmood AU, Singh A, Shevchenko VV, Yingling YG, Tsukruk VV. Weakly Ionically Bound Thermosensitive Hyperbranched Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2913-2927. [PMID: 33621461 DOI: 10.1021/acs.langmuir.0c03487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We synthesized novel amphiphilic hyperbranched polymers (HBPs) with variable contents of weakly ionically tethered thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) macrocations in contrast to traditional covalent linking. Their assembling behavior was studied below and above the lower critical solution temperature (LCST). The HBPs underwent a morphological transition under changing temperature and ionic strength due to the LCST transition of PNIPAM and the reduction in the ionization degree of terminal ionic groups, respectively. We suggest that, in contrast to traditional branched polymers, ionically linked PNIPAM macrocations can reversibly disassociate from the sulfonate groups and form mobile coronas, endowing the dynamic micellar morphologies. In addition, assembly at the air-water interface confined PNIPAM macrocations and resulted in the formation of heterogeneous Langmuir-Blodgett (LB) monolayers with diverse surface morphologies for different peripheral compositions with circular domains formed in the condensed state. The HBPs with 25% PNIPAM showed larger and more stable circular domains that were partially preserved at high compression than those of HBPs with 50% PNIPAM. Moreover, the LB monolayers showed variable surface mechanical and surface charge distribution, which can be attributed to net dipole redistribution caused by the behavior of mobile PNIPAM macrocations and core sulfonate groups.
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Affiliation(s)
- Hansol Lee
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Alexandr Stryutsky
- Institute of Macromolecular Chemistry of the National Academy of Sciences of Ukraine, Kharkivske Shosse 48, Kyiv 02160, Ukraine
| | - Akhlak-Ul Mahmood
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7907, United States
| | - Abhishek Singh
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7907, United States
| | - Valery V Shevchenko
- Institute of Macromolecular Chemistry of the National Academy of Sciences of Ukraine, Kharkivske Shosse 48, Kyiv 02160, Ukraine
| | - Yaroslava G Yingling
- Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7907, United States
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Köklükaya O, Karlsson RMP, Carosio F, Wågberg L. The use of model cellulose gel beads to clarify flame-retardant characteristics of layer-by-layer nanocoatings. Carbohydr Polym 2021; 255:117468. [PMID: 33436236 DOI: 10.1016/j.carbpol.2020.117468] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 01/21/2023]
Abstract
Layer-by-Layer (LbL) assembled nanocoatings are exploited to impart flame-retardant properties to cellulosic substrates. A model cellulose material can make it possible to investigate an optimal bilayer (BL) range for the deposition of coating while elucidating the main flame-retardant action thus allowing for an efficient design of optimized LbL formulations. Model cellulose gel beads were prepared by dissolving cellulose-rich fibers followed by precipitation. The beads were LbL-treated with chitosan (CH) and sodium hexametaphosphate (SHMP). The char forming properties were studied using thermal gravimetric analysis. The coating increased the char yield in nitrogen to up to 29 % and showed a distinct pattern of micro intumescent behavior upon heating. An optimal range of 10-20 BL is observed. The well-defined model cellulose gel beads hence introduce a new scientific route both to clarify the fundamental effects of different film components and to optimize the composition of the films.
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Affiliation(s)
- Oruç Köklükaya
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden.
| | - Rose-Marie Pernilla Karlsson
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; Wallenberg Wood Science Center, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Federico Carosio
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Alessandria Site Viale Teresa Michel 5, 15121, Alessandria, Italy
| | - Lars Wågberg
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden; Wallenberg Wood Science Center, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
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14
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Zhou Z, Ju X, Chen J, Wang R, Zhong Y, Li L. Charge-oriented strategies of tunable substrate affinity based on cellulase and biomass for improving in situ saccharification: A review. BIORESOURCE TECHNOLOGY 2021; 319:124159. [PMID: 33010717 DOI: 10.1016/j.biortech.2020.124159] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
The intrinsic recalcitrance of lignocellulosic biomass makes it resistant to enzymatic hydrolysis. The electron-rich surface of the lignin and cellulose-alike structure of hemicellulose competitively absorb the cellulase. Thus, modifying the surface charge on biomass components to alter cellulase affinity is an urgent requisite. Developing charge tunable cellulase will alter substrate affinity. Also, charge-based immobilization generates controllable substrate affinity. Within immobilized cellulase involved in situ biomass saccharification, charge effects made a crucial contribution. In addition to affecting the interaction between immobilized cellulase and biomass, charge exerts an impact on cellulase to immobilize the materials, further investigation is essential. This study aims to review the charge effects on the cellulase affinity in biomass saccharification, strategies of charge tunable cellulase, and immobilized cellulase, thereby explaining the role of electrostatic interaction. In terms of electrostatic behavior, the pathways and plans to improve in situ biomass saccharification seem to be promising.
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Affiliation(s)
- Zheng Zhou
- College of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Xin Ju
- College of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Jiajia Chen
- College of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Rong Wang
- College of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Yuqing Zhong
- College of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Liangzhi Li
- College of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, PR China.
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15
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Alipoormazandarani N, Fokkink R, Fatehi P. Deposition behavior of lignin on solid surfaces assessed by stagnation point adsorption reflectometry. RSC Adv 2021; 11:16980-16988. [PMID: 35479723 PMCID: PMC9032271 DOI: 10.1039/d1ra02248b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 04/22/2021] [Indexed: 11/28/2022] Open
Abstract
The deposition behavior of lignin on a solid surface was studied using stagnation point adsorption reflectometry (SPAR) comprehensively. In this study, the light absorption coefficient of lignin (τ = 20 476 m−1) at 633 nm wavelength was considered to define a new imaginary refractive index (k) used in the SPAR technique for adsorption analysis. The inclusion of k in the adsorption model yielded an adsorbed amount (Γ) of 1.11 mg m−2, leading to the quality factor (Qf) of 31.71 mg m−2. At a lower concentration, the deposition of lignin on the surface was increased, and it generated a maximum sticking coefficient of β = 0.71 at 25 mg L−1 on the surface. At the concentration range of 35 and 45 mg L−1, lignin formed clusters and its deposition dropped. The use of Quartz crystal microbalance (QCM) and SPAR techniques also confirmed that the proportion of water in the deposited lignin adlayer was greater when a lower concentration (5–25 mg L−1) of lignin solution was used for adsorption. The findings of this study revealed the potential use of the SPAR technique for evaluating the deposition performance of lignin-based materials on varied surfaces, which would facilitate the development of coating and composite applications for lignin. The deposition of lignin on a solid surface (i.e., SiO2 made wafer) was fundamentally studied using Stagnation Point Adsorption Reflectometry (SPAR).![]()
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Affiliation(s)
| | - Remco Fokkink
- Laboratory of Physical Chemistry and Soft Matter
- Wageningen University & Research
- The Netherlands
| | - Pedram Fatehi
- Chemical Engineering Department
- Lakehead University
- Thunder Bay
- Canada
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16
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Facchine EG, Bai L, Rojas OJ, Khan SA. Associative structures formed from cellulose nanofibrils and nanochitins are pH-responsive and exhibit tunable rheology. J Colloid Interface Sci 2020; 588:232-241. [PMID: 33401050 DOI: 10.1016/j.jcis.2020.12.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/12/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023]
Abstract
HYPOTHESIS Nanocellulose and nanochitin are both biobased materials with complementary structures and properties. Both exhibit pH-dependent surface charges which are opposite in sign. Hence, it should be possible to manipulate them to form complexed structures via ionic bond formation at prescribed pH conditions. EXPERIMENT Nanocellulose and nanochitin were mixed after exposure to acidic or neutral conditions to influence their ionization state. The heat of interaction during the introduction of nanochitin to nanocellulose was monitored via isothermal titration calorimetry. The strength and gel properties of the resulting structures were characterized via rheological measurement. FINDINGS The resultant gel properties in the designed hybrid systems were found to depend directly on the charge state of the starting materials, which was dictated by pH adjustment. Different interparticle interactions including ionic attraction, hydrophobic associations, and physical entanglement were identified in the systems and the influence of each was elucidated for different conditions of pH, concentration, and ratio of nanochitin to nanocellulose. Hydrophobic associations between neutralized nanochitin particles were found to contribute strongly to increased elastic modulus values. Ionic complex formation was found to provide enhanced stability under broader pH conditions, while physical entanglement of cellulose nanofibers was a substantial thickening mechanism in all systems.
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Affiliation(s)
- Emily G Facchine
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Long Bai
- Department of Byproducts and Biosystems, School of Chemical Engineering, Aalto University, FI-00076 Aalto, Espoo, Finland; Bioproducts Institute, Departments of Chemical and Biological Engineering, Chemistry and Wood Science, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Orlando J Rojas
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA; Department of Byproducts and Biosystems, School of Chemical Engineering, Aalto University, FI-00076 Aalto, Espoo, Finland; Bioproducts Institute, Departments of Chemical and Biological Engineering, Chemistry and Wood Science, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.
| | - Saad A Khan
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.
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17
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Alipoormazandarani N, Fatehi P. Interaction Mechanism of Anionic Lignin and Cationic Soft Surface in Saline Systems. J Phys Chem B 2020; 124:8678-8689. [PMID: 32865994 DOI: 10.1021/acs.jpcb.0c04442] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lignin has a complicated three-dimensional structure that is different from other synthetic and bio-based materials. In this work, we first examined the physicochemical behavior, i.e., apparent hydrodynamic radius (Rh) and ζ-potential, of carboxymethylated lignin (CM) in a saline system. Then, the detailed interaction and adsorption behavior of CM on a cationic poly(diallyldimethylammonium chloride) (PDADMAC)-coated surface were investigated in a saline system by a quartz crystal microbalance with dissipation. The theoretical and experimental adsorption data revealed that CM made limited surface coverage at a low salt concentration via charge neutralization following an intrinsic compensation mechanism. At a higher salt concentration, the adsorption of CM was improved significantly following the extrinsic compensation mechanism and nonionic interaction (e.g., hydrophobic interaction). The adsorption affinity of CM in the urea environment revealed the contribution (10-30%) of hydrogen bonding in the adsorption of CM on the PDADMAC surface. Contrary to what was found for the CM, the adsorption of a linear poly(acrylic acid-acrylamide) (PAM) on the PDADMAC surface exhibited a dramatic decrease at higher salinity, possibly due to the absence of nonionic and hydrophobic interactions between PAM and the surface. The findings of this study showed the superior adsorption performance of the lignin-based polyelectrolytes to the synthetic ones in salt-containing systems.
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Affiliation(s)
- Niloofar Alipoormazandarani
- Green Processes Research Centre and Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, ON, Canada P7B 5E1
| | - Pedram Fatehi
- Green Processes Research Centre and Chemical Engineering Department, Lakehead University, 955 Oliver Road, Thunder Bay, ON, Canada P7B 5E1
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18
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Chen C, Enrico A, Pettersson T, Ek M, Herland A, Niklaus F, Stemme G, Wågberg L. Bactericidal surfaces prepared by femtosecond laser patterning and layer-by-layer polyelectrolyte coating. J Colloid Interface Sci 2020; 575:286-297. [PMID: 32380320 DOI: 10.1016/j.jcis.2020.04.107] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/24/2020] [Accepted: 04/25/2020] [Indexed: 11/15/2022]
Abstract
Antimicrobial surfaces are important in medical, clinical, and industrial applications, where bacterial infection and biofouling may constitute a serious threat to human health. Conventional approaches against bacteria involve coating the surface with antibiotics, cytotoxic polymers, or metal particles. However, these types of functionalization have a limited lifetime and pose concerns in terms of leaching and degradation of the coating. Thus, there is a great interest in developing long-lasting and non-leaching bactericidal surfaces. To obtain a bactericidal surface, we combine micro and nanoscale patterning of borosilicate glass surfaces by ultrashort pulsed laser irradiation and a non-leaching layer-by-layer polyelectrolyte modification of the surface. The combination of surface structure and surface charge results in an enhanced bactericidal effect against both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli bacteria. The laser patterning and the layer-by-layer modification are environmentally friendly processes that are applicable to a wide variety of materials, which makes this method uniquely suited for fundamental studies of bacteria-surface interactions and paves the way for its applications in a variety of fields, such as in hygiene products and medical devices.
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Affiliation(s)
- Chao Chen
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden.
| | - Alessandro Enrico
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas väg 10, 100 44 Stockholm, Sweden.
| | - Torbjörn Pettersson
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden; Department of Fiber and Polymer Technology, Wallenberg Wood Science Centre, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden.
| | - Monica Ek
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden.
| | - Anna Herland
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas väg 10, 100 44 Stockholm, Sweden; Swedish Medical Nanoscience Center, Department of Neuroscience, Karolinska Institute, 17177 Stockholm, Sweden.
| | - Frank Niklaus
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas väg 10, 100 44 Stockholm, Sweden.
| | - Göran Stemme
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas väg 10, 100 44 Stockholm, Sweden.
| | - Lars Wågberg
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden; Department of Fiber and Polymer Technology, Wallenberg Wood Science Centre, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden.
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19
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Dual-Responsive Nanotubes Assembled by Amphiphilic Dendrimers: Controlled Release and Crosslinking. MATERIALS 2020; 13:ma13163479. [PMID: 32784570 PMCID: PMC7475864 DOI: 10.3390/ma13163479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/25/2020] [Accepted: 08/03/2020] [Indexed: 11/16/2022]
Abstract
Although stimuli-responsive release systems have attracted great attention in medical applications, there has been no attempt at “precise” deep profile control based on such systems, which is greatly need to improve oil recovery. With this in mind, we provided a facile and simple strategy to prepare stimuli-responsive composite capsules of amphiphilic dendrimers–poly(styrene sulfonic acid) sodium/halloysite nanotubes (HNTs) via layer-by-layer (LbL) self-assembly technique, controlling the release crosslinking agent methenamine under different pH or salinity conditions. The release time of methenamine encapsulated in multilayer shells is about 40 h, which can be prolonged with the introduction of salt or shortened via the addition of acid, which accordingly induces the gelation of polyacrylamide (PAM) solutions, taking from a few hours to a dozen days. This study provided a novel approach for controllable release of chemical agents and controllable crosslinking of deep profiles in many application fields.
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20
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Ergün A, Tümer EH, Cengiz HY, Deligöz H. Monitoring the Salt Stability of Layer‐by‐Layer Self‐Assembled Films From Polyelectrolyte Blends by Quartz Crystal Microbalance‐Dissipation and Their Ion Separation Performances. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25356] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Ayça Ergün
- Chemical Engineeringİstanbul University‐Cerrahpaşa, Engineering Faculty 34320 Avcılar, İstanbul Turkey
| | - Eda Hazal Tümer
- Engineering Faculty, Chemical EngineeringGebze Technical University 41400 Gebze Kocaeli Turkey
| | - Hacer Yeşim Cengiz
- Chemical Engineeringİstanbul University‐Cerrahpaşa, Engineering Faculty 34320 Avcılar, İstanbul Turkey
| | - Hüseyin Deligöz
- Chemical Engineeringİstanbul University‐Cerrahpaşa, Engineering Faculty 34320 Avcılar, İstanbul Turkey
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21
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Brett CJ, Mittal N, Ohm W, Gensch M, Kreuzer LP, Körstgens V, Månsson M, Frielinghaus H, Müller-Buschbaum P, Söderberg LD, Roth SV. Water-Induced Structural Rearrangements on the Nanoscale in Ultrathin Nanocellulose Films. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00531] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Calvin J. Brett
- Department of Mechanics, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
- Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany
| | - Nitesh Mittal
- Department of Mechanics, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
| | - Wiebke Ohm
- Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany
| | - Marc Gensch
- Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany
| | | | | | - Martin Månsson
- Department of Applied Physics, KTH Royal Institute of Technology, Stockholm 164 40, Sweden
| | - Henrich Frielinghaus
- Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Garching 52428, Germany
| | | | - L. Daniel Söderberg
- Department of Mechanics, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
| | - Stephan V. Roth
- Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
- Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany
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22
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Chen C, Petterson T, Illergård J, Ek M, Wågberg L. Influence of Cellulose Charge on Bacteria Adhesion and Viability to PVAm/CNF/PVAm-Modified Cellulose Model Surfaces. Biomacromolecules 2019; 20:2075-2083. [DOI: 10.1021/acs.biomac.9b00297] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Chao Chen
- Department of Fibre and Polymer Technology, School of Engineering Science in Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology. Teknikringen 56-58, Stockholm 100 44, Sweden
| | - Torbjörn Petterson
- Department of Fibre and Polymer Technology, School of Engineering Science in Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology. Teknikringen 56-58, Stockholm 100 44, Sweden
| | - Josefin Illergård
- Department of Fibre and Polymer Technology, School of Engineering Science in Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology. Teknikringen 56-58, Stockholm 100 44, Sweden
| | - Monica Ek
- Department of Fibre and Polymer Technology, School of Engineering Science in Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology. Teknikringen 56-58, Stockholm 100 44, Sweden
| | - Lars Wågberg
- Department of Fibre and Polymer Technology, School of Engineering Science in Chemistry, Biotechnology and Health (CBH), KTH Royal Institute of Technology. Teknikringen 56-58, Stockholm 100 44, Sweden
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23
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Kaldéus T, Telaretti Leggieri MR, Cobo Sanchez C, Malmström E. All-Aqueous SI-ARGET ATRP from Cellulose Nanofibrils Using Hydrophilic and Hydrophobic Monomers. Biomacromolecules 2019; 20:1937-1943. [DOI: 10.1021/acs.biomac.9b00153] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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24
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Ma W, Zhang Y, Li F, Kou D, Lutkenhaus JL. Layer-by-Layer Assembly and Electrochemical Study of Alizarin Red S-Based Thin Films. Polymers (Basel) 2019; 11:E165. [PMID: 30960149 PMCID: PMC6401759 DOI: 10.3390/polym11010165] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 12/21/2018] [Accepted: 01/02/2019] [Indexed: 12/23/2022] Open
Abstract
Electroactive organic dyes incorporated in layer-by-layer (LbL) assemblies are of great interest for a variety of applications. In this paper, Alizarin Red S (ARS), an electroactive anthraquinone dye, is employed to construct LbL (BPEI/ARS)n films with branched poly(ethylene imine) (BPEI) as the complementary polymer. Unconventional LbL methods, including co-adsorption of ARS and poly(4-styrene sulfonate) (PSS) with BPEI to assemble (BPEI/(ARS+PSS))n, as well as pre-complexation of ARS with BPEI and further assembly with PSS to fabricate ((BPEI+ARS)/PSS)n, are designed for investigation and comparison. Film growth patterns, UV⁻Vis spectra and surface morphology of the three types of LbL assemblies are measured and compared to reveal the formation mechanism of the LbL films. Electrochemical properties including cyclic voltammetry and spectroelectrochemistry of (BPEI/ARS)120, (BPEI/(ARS+PSS))120 and ((BPEI+ARS)/PSS)120 films are studied, and the results show a slight color change due to the redox reaction of ARS. ((BPEI+ARS)/PSS)120 shows the best stability among the three samples. It is concluded that the manner of dye- incorporation has a great effect on the electrochemical properties of the resultant films.
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Affiliation(s)
- Wei Ma
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China.
| | - Yanpu Zhang
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Fei Li
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Donghui Kou
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning 116023, China.
| | - Jodie L Lutkenhaus
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA.
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25
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Alipoormazandarani N, Fatehi P. Adsorption Characteristics of Carboxymethylated Lignin on Rigid and Soft Surfaces Probed by Quartz Crystal Microbalance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:15293-15303. [PMID: 30468388 DOI: 10.1021/acs.langmuir.8b02694] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Limited information is available on the interaction of anionically charged lignin and cationic particles, despite the promising use of anionic lignin as a coagulant and dispersant for suspension systems. The main objective of this study was to discover the fate of lignin on its interaction with rigid and soft surfaces. In this work, carboxymethylated lignin (CML) with two different charge densities were produced, and their adsorption performance on gold and poly(diallydimethylammonium chloride) (PDADMAC)-coated gold surfaces was comprehensively studied. The viscoelastic properties of adsorbed CML on the gold surface were investigated by means of quartz crystal microbalance with dissipation. A higher adsorbed amount and compact layer were observed for the adsorption of CML with a lower charge density of -1.16 meq/g (CML1). CML with a higher charge density (-2.92 meq/g), CML2, yielded a lower surface excess density of 2.31 × 10-6 mol/m2 and a higher occupied area per molecule (71.84 Å2) at the interface of water and gold sensor. Below and at equilibrium, CML2 generated a bulkier adsorption layer than did CML1 on the gold sensor and on the PDADMAC-coated sensor. Studies on the layer-by-layer (LBL) assembly of CML and PDADMAC revealed that CML1 adsorbed more greatly than CML2 on PDADMAC, and it generated a thicker but less viscoelastic layer. In this system, the greater loss to storage modulus ( G″/ G') value was achieved for CML2, indicating its looser structure in the LBL system. Studies on the LBL assembly of carboxymethylated xylan/PDADMAC and CML/PDADMAC provided concrete evidence for the fate of three-dimensional structure of CML on its adsorption performance.
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Affiliation(s)
| | - Pedram Fatehi
- Chemical Engineering Department , Lakehead University , 955 Oliver Road , Thunder Bay , ON , Canada P7B 5E1
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26
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Zhang K, Liimatainen H. Hierarchical Assembly of Nanocellulose-Based Filaments by Interfacial Complexation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1801937. [PMID: 30151995 DOI: 10.1002/smll.201801937] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 08/09/2018] [Indexed: 05/28/2023]
Abstract
In the present study, interfacial complexation spinning of oppositely charged cellulose-materials is applied to fabricate hierarchical and continuous nanocellulose based filaments under aqueous conditions by using cationic cellulose nanocrystals with different anionic celluloses including soluble sodium carboxymethyl cellulose and insoluble 2,2,6,6-tetramethylpiperidinyl-1-oxy radical-oxidized cellulose nanofibers and dicarboxylated cellulose nanocrystals (DC-CNC). The morphologies of the wet and dry nanocellulose based filaments are further investigated by optical and electron microscopy. All fabricated continuous nanocellulose based filaments display a hierarchical structure similar to the natural cellulose fibers in plant cells. As far as it is known, this is not only the first report about the fabrication of nanocellulose based filaments by interfacial complexation of cationic CNCs with anionic celluloses but also the first demonstration of fabricating continuous fibers directly from oppositely charged nanoparticles by interfacial nanoparticle complexation (INC). This INC approach may provide a new route to design continuous filaments from many other oppositely charged nanoparticles with tailored characteristics.
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Affiliation(s)
- Kaitao Zhang
- Fiber and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014, Oulu, Finland
| | - Henrikki Liimatainen
- Fiber and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014, Oulu, Finland
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27
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Alotaibi HF, Al Thaher Y, Perni S, Prokopovich P. Role of processing parameters on surface and wetting properties controlling the behaviour of layer-by-layer coated nanoparticles. Curr Opin Colloid Interface Sci 2018. [DOI: 10.1016/j.cocis.2018.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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