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Display of hidden properties of flexible aerogel based on bacterial cellulose/polyaniline nanocomposites with helping of multiscale modeling. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110251] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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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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Calabrese V, Muñoz-García JC, Schmitt J, da Silva MA, Scott JL, Angulo J, Khimyak YZ, Edler KJ. Understanding heat driven gelation of anionic cellulose nanofibrils: Combining saturation transfer difference (STD) NMR, small angle X-ray scattering (SAXS) and rheology. J Colloid Interface Sci 2018; 535:205-213. [PMID: 30293046 DOI: 10.1016/j.jcis.2018.09.085] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 09/21/2018] [Accepted: 09/24/2018] [Indexed: 11/18/2022]
Abstract
A novel mechanism of heat-triggered gelation for oxidised cellulose nanofibrils (OCNF) is reported. We demonstrate that a synergistic approach combining rheology, small-angle X-ray scattering (SAXS) and saturation transfer difference NMR (STD NMR) experiments enables a detailed characterisation of gelation at different length scales. OCNF dispersions experience an increase in solid-like behaviour upon heating as evidenced by rheological studies, associated with enhanced interfibrillar interactions measured using SAXS. Interactions result in an increased fibrillar overlap and increased population of confined water molecules monitored by STD NMR. In comparison, cationic cellulose nanofibrils (produced by reaction of cellulose with trimethylglycidylammonium chloride) were found to be heat-unresponsive.
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Affiliation(s)
- Vincenzo Calabrese
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Juan C Muñoz-García
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
| | - Julien Schmitt
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Marcelo A da Silva
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Janet L Scott
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK; Centre for Sustainable Chemical Technology, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Jesús Angulo
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
| | - Yaroslav Z Khimyak
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.
| | - Karen J Edler
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
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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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Su CY, Yang AC, Jiang JS, Yang ZH, Huang YS, Kang DY, Hua CC. Properties of Single-Walled Aluminosilicate Nanotube/Poly(vinyl alcohol) Aqueous Dispersions. J Phys Chem B 2017; 122:380-391. [DOI: 10.1021/acs.jpcb.7b10079] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chien-You Su
- Department
of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
| | - An-Chih Yang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Jung-Shiun Jiang
- Department
of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
| | - Zhi-Huei Yang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Yan-Shu Huang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Dun-Yen Kang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chi-Chung Hua
- Department
of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
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