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Ahsan HM, Zhang X, Li Y, Li B, Liu S. Surface modification of microcrystalline cellulose: Physicochemical characterization and applications in the Stabilization of Pickering emulsions. Int J Biol Macromol 2019; 132:1176-1184. [DOI: 10.1016/j.ijbiomac.2019.04.051] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 02/12/2019] [Accepted: 04/08/2019] [Indexed: 11/28/2022]
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Cellulose microfibril networks in hydrolysed soy protein isolate solutions. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Peng J, Calabrese V, Geurtz J, Velikov KP, Venema P, van der Linden E. Composite Gels Containing Whey Protein Fibrils and Bacterial Cellulose Microfibrils. J Food Sci 2019; 84:1094-1103. [PMID: 31038744 PMCID: PMC6593742 DOI: 10.1111/1750-3841.14509] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 12/18/2018] [Accepted: 02/18/2019] [Indexed: 11/29/2022]
Abstract
In this study, we investigated the gelation of WPI fibrils in the presence of bacterial cellulose (BC) microfibrils at pH 2 upon prolonged heating. Rheology and microstructure were investigated as a function of BC microfibril concentration. The presence of BC microfibrils did not influence the gelation dynamics and resulting overall structure of the WPI fibrillar gel. The storage modulus and loss modulus of the mixed WPI‐BC microfibril gels increased with increasing BC microfibril concentration, whereas the ratio between loss modulus and storage modulus remained constant. The WPI fibrils and BC microfibrils independently form two coexisting gel networks. Interestingly, near to the BC microfibrils more aligned WPI fibrils seemed to be formed, with individual WPI fibrils clearly distinguishable. The level of alignment of the WPI fibrils seemed to be dependent on the distance between BC microfibrils and WPI fibrils. This also is in line with our observation that with more BC microfibrils present, WPI fibrils are more aligned than in a WPI fibrillar gel without BC microfibrils. The large deformation response of the gels at different BC microfibril concentration and NaCl concentration is mainly influenced by the concentration of NaCl, which affects the WPI fibrillar gel structures, changing form linear fibrillar to a particulate gel. The WPI fibrillar gel yields the dominant contribution to the gel strength.
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Affiliation(s)
- Jinfeng Peng
- Physics and Physical Chemistry of Foods, Dept. of Agrotechnology and Food Sciences, Wageningen Univ., P.O. Box 17, 6700 AA, Wageningen, The Netherlands
| | - Vincenzo Calabrese
- Physics and Physical Chemistry of Foods, Dept. of Agrotechnology and Food Sciences, Wageningen Univ., P.O. Box 17, 6700 AA, Wageningen, The Netherlands
| | - Julia Geurtz
- Physics and Physical Chemistry of Foods, Dept. of Agrotechnology and Food Sciences, Wageningen Univ., P.O. Box 17, 6700 AA, Wageningen, The Netherlands
| | - Krassimir P Velikov
- Unilever R&D Vlaardingen, Olivier van Noortlaan, 120, 3133 AT, Vlaardingen, The Netherlands.,Inst. of Physics, Univ. of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands.,Soft Condensed Matter, Debye Institute for NanoMaterials Science, Utrecht Univ., Princetonplein 5, 3584 CC, Utrecht, The Netherlands
| | - Paul Venema
- Physics and Physical Chemistry of Foods, Dept. of Agrotechnology and Food Sciences, Wageningen Univ., P.O. Box 17, 6700 AA, Wageningen, The Netherlands
| | - Erik van der Linden
- Physics and Physical Chemistry of Foods, Dept. of Agrotechnology and Food Sciences, Wageningen Univ., P.O. Box 17, 6700 AA, Wageningen, The Netherlands
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Peng J, Calabrese V, Ainis WN, Scager R, Velikov KP, Venema P, van der Linden E. Mixed gels from whey protein isolate and cellulose microfibrils. Int J Biol Macromol 2018; 124:1094-1105. [PMID: 30476515 DOI: 10.1016/j.ijbiomac.2018.11.210] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 11/22/2018] [Accepted: 11/22/2018] [Indexed: 11/18/2022]
Abstract
Whey proteins can form different gel structures ranging from fine-stranded to particulate when appropriate conditions are applied. By incorporating polysaccharides, the gelation of WPI can be influenced. We investigated the heat-induced gelation of whey protein isolate (WPI) in the presence of bacterial cellulose (BC) microfibrils at pH 7 at different concentrations of NaCl. Our results showed that WPI and BC microfibrils form a homogeneous dispersion at pH 7. Upon heating, the WPI gel was formed independently in the presence of the BC microfibril gel, resulting in the formation of a composite gel. The gel structure and gelation dynamics of WPI was not influenced by the presence of BC microfibrils. However, the presence of BC microfibrils increased the storage modulus of the WPI gel, with an increase being negligible when the strength of the WPI gel is above a certain value. With an increase of NaCl concentration, the WPI gel structure changes from fine-stranded to a particulate gel, while the BC microfibril gel structure remains unchanged. No macroscopic phase separation could be observed in the WPI-BC microfibril gels. Our results showed that the rheological properties and water holding capacity of the WPI-BC microfibril mixed gels are mainly dominated by the WPI.
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Affiliation(s)
- Jinfeng Peng
- Physics and Physical Chemistry of Foods, Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - Vincenzo Calabrese
- Physics and Physical Chemistry of Foods, Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - William Nicholas Ainis
- Physics and Physical Chemistry of Foods, Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - Ruben Scager
- Physics and Physical Chemistry of Foods, Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - Krassimir P Velikov
- Unilever R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, the Netherlands; Soft Condensed Matter, Debye Institute for NanoMaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, the Netherlands
| | - Paul Venema
- Physics and Physical Chemistry of Foods, Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 17, 6700 AA Wageningen, the Netherlands.
| | - Erik van der Linden
- Physics and Physical Chemistry of Foods, Department of Agrotechnology and Food Sciences, Wageningen University, P.O. Box 17, 6700 AA Wageningen, the Netherlands
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Peng J, Calabrese V, Veen SJ, Versluis P, Velikov KP, Venema P, van der Linden E. Rheology and microstructure of dispersions of protein fibrils and cellulose microfibrils. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2018.03.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sviderskyi V, Melnyk L, Shendera A, Fleisher H. Rheological Properties of Polymer Colloid–Cellulose Thickener Systems. CHEMISTRY & CHEMICAL TECHNOLOGY 2018. [DOI: 10.23939/chcht12.02.207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Agarwal D, MacNaughtan W, Foster TJ. Interactions between microfibrillar cellulose and carboxymethyl cellulose in an aqueous suspension. Carbohydr Polym 2018; 185:112-119. [DOI: 10.1016/j.carbpol.2017.12.086] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 12/08/2017] [Accepted: 12/31/2017] [Indexed: 10/18/2022]
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Mohan S, Jose J, Kuijk A, Veen SJ, van Blaaderen A, Velikov KP. Revealing and Quantifying the Three-Dimensional Nano- and Microscale Structures in Self-Assembled Cellulose Microfibrils in Dispersions. ACS OMEGA 2017; 2:5019-5024. [PMID: 30023735 PMCID: PMC6044974 DOI: 10.1021/acsomega.7b00536] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 06/13/2017] [Indexed: 06/08/2023]
Abstract
Cellulose microfibrils (CMFs) are an important nanoscale building block in many novel biobased functional materials. The spatial nano- and microscale organization of the CMFs is a crucial factor for defining the properties of these materials. Here, we report for the first time a direct three-dimensional (3D) real-space analysis of individual CMFs and their networks formed after ultrahigh-shear-induced transient deagglomeration and self-assembly in a solvent. Using point-scanning confocal microscopy combined with tracking the centerlines of the fibrils and their junctions by a stretching open active contours method, we reveal that dispersions of the native CMFs assemble into highly heterogeneous networks of individual fibrils and bundles. The average network mesh size decreases with increasing CMF volume fraction. The cross-sectional width and the average length between the twists in the ribbon-shaped CMFs are directly determined and compared well with that of fibrils in the dried state. Finally, the generality of the fluorescent labeling and imaging approach on other CMF sources is illustrated. The unique ability to quantify in situ the multiscale structure in CMF dispersions provides a powerful tool for the correlation of process-structure-property relationship in cellulose-containing composites and dispersions.
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Affiliation(s)
- Srivatssan Mohan
- Soft
Condensed Matter, Debye Institute for NanoMaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
| | - Jissy Jose
- Unilever
R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands
| | - Anke Kuijk
- Unilever
R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands
| | - Sandra J. Veen
- Unilever
R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands
| | - Alfons van Blaaderen
- Soft
Condensed Matter, Debye Institute for NanoMaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
| | - Krassimir P. Velikov
- Soft
Condensed Matter, Debye Institute for NanoMaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
- Unilever
R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands
- Institute
of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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Chen Y, Xu C, Huang J, Wu D, Lv Q. Rheological properties of nanocrystalline cellulose suspensions. Carbohydr Polym 2017; 157:303-310. [DOI: 10.1016/j.carbpol.2016.10.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/01/2016] [Accepted: 10/03/2016] [Indexed: 10/20/2022]
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de Kort DW, Veen SJ, Van As H, Bonn D, Velikov KP, van Duynhoven JPM. Yielding and flow of cellulose microfibril dispersions in the presence of a charged polymer. SOFT MATTER 2016; 12:4739-4744. [PMID: 27120969 DOI: 10.1039/c5sm02869h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The shear flow of microfibrillated cellulose dispersions is still not wholly understood as a consequence of their multi-length-scale heterogeneity. We added carboxymethyl cellulose, a charged polymer, that makes cellulose microfibril dispersions more homogeneous at the submicron and macro scales. We then compared the yielding and flow behavior of these dispersions to that of typical thixotropic yield-stress fluids. Despite the apparent homogeneity of the dispersions, their flow velocity profiles in cone-plate geometry, as measured by rheo-MRI velocimetry, differ strongly from those observed for typical thixotropic model systems: the viscosity across the gap is not uniform, despite a flat stress field across the gap. We describe these velocity profiles with a nonlocal model, and attribute the non-locality to persistent micron-scale structural heterogeneity.
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Affiliation(s)
- Daan W de Kort
- Laboratory of Biophysics, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands. and TI-COAST, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Sandra J Veen
- Unilever R&D, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands
| | - Henk Van As
- Laboratory of Biophysics, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands. and TI-COAST, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Daniel Bonn
- Van der Waals-Zeeman Institute, IoP, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Krassimir P Velikov
- Unilever R&D, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands and Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
| | - John P M van Duynhoven
- Laboratory of Biophysics, Wageningen University, Dreijenlaan 3, 6703 HA Wageningen, The Netherlands. and TI-COAST, Science Park 904, 1098 XH Amsterdam, The Netherlands and Unilever R&D, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands
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Veen SJ, Versluis P, Kuijk A, Velikov KP. Microstructure and rheology of microfibril-polymer networks. SOFT MATTER 2015; 11:8907-8912. [PMID: 26434637 DOI: 10.1039/c5sm02086g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
By using an adsorbing polymer in combination with mechanical de-agglomeration, the microstructure and rheological properties of networks of microfibrils could be controlled. By the addition of sodium carboxymethyl cellulose during de-agglomeration of networks of bacterial cellulose, the microstructure could be changed from an inhomogeneous network with bundles of microfibrils and voids to a more homogeneous spread and alignment of the particles. As a result the macroscopic rheological properties were altered. Although still elastic and gel-like in nature, the elasticity and viscous behavior of the network as a function of microfibril concentration is altered. The microstructure is thus changed by changing the surface properties of the building blocks leading to a direct influence on the materials macroscopic behavior.
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Affiliation(s)
- Sandra J Veen
- Unilever R&D Vlaardingen, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands.
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