1
|
Antoniw JM, Hallman MT, Kiriakou MV, Morse T, Cranston ED. Colloidal Stability Window for Carboxylated Cellulose Nanocrystals: Considerations for Handling, Characterization, and Formulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:10321-10334. [PMID: 37459396 DOI: 10.1021/acs.langmuir.3c00319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
The scale of production of cellulose nanocrystals (CNCs) has increased dramatically to meet the growing demand for sustainably sourced materials. This work defines the colloidal stability window for commercially produced carboxylated CNCs (DextraCel) compared to the more traditional sulfated CNCs. Phase diagrams showing the stable, reversibly agglomerated, irreversibly aggregated/sedimented, and colloidal glass "zones" as a function of suspension pH, ionic strength, CNC surface charge content, counterion, and concentration are presented. The pKa of carboxylated CNCs was measured to be 5.1, and suspensions of carboxylated CNCs (0.5-1.5 wt %) were visually stable from pH 3 to 11 (without salt). Carboxylated CNCs were highly sensitive to ionic strength, demonstrating some agglomeration with as little as 5 mM NaCl, supporting that weak acid surface groups and lower charge contents make CNCs more sensitive to solution conditions. Surface charge content had the greatest influence on colloidal stability followed by the counterion; carboxylated CNCs were more stable in the "as-received" sodium form, whereas sulfated CNCs had improved stability in acid form after ion exchange. The stability of carboxylated CNCs with industrially relevant additives (ionic and nonionic surfactants and initiators) was also investigated. Less concentrated suspensions were more colloidally stable, emphasizing that characterization and processing of CNCs favor dilute conditions. If carboxylated CNCs are subjected to conditions outside of their colloidal stability window, simple dilution or pH adjustment does not return them to colloidally stable discrete nanoparticles; however, ultrasonication can redisperse agglomerates. This study offers guidelines for handling carboxylated CNCs to broaden the range of products that can be improved by their incorporation.
Collapse
Affiliation(s)
- Julia M Antoniw
- Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
| | - Madeleine T Hallman
- Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
| | | | | | - Emily D Cranston
- Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4
- Department of Wood Science, University of British Columbia, Vancouver, British Columbia, CanadaV6T 1Z3
- UBC Bioproducts Institute, 2385 East Mall, Vancouver, British Columbia, Canada V6T 1Z4
| |
Collapse
|
2
|
Sagawa T, Oishi M, Yataka Y, Sato R, Iijima K, Hashizume M. Control of the molecular permeability of polysaccharide composite films utilizing a molecular imprinting approach. Polym J 2022. [DOI: 10.1038/s41428-021-00605-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
3
|
Sunayama H, Takamiya K, Takano E, Horikawa R, Kitayama Y, Takeuchi T. Simultaneous Detection of Two Tumor Marker Proteins Using Dual-Colored Signaling Molecularly Imprinted Polymers Prepared via Multi-Step Post-Imprinting Modifications. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200254] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Hirobumi Sunayama
- Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Kazuhiro Takamiya
- Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Eri Takano
- Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Ryo Horikawa
- Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Yukiya Kitayama
- Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
| | - Toshifumi Takeuchi
- Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan
- Center for Advanced Medical Engineering Research & Development (CAMED), Kobe University, 1-5-1 Minatojimaminami-machi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| |
Collapse
|
4
|
Smart materials for point-of-care testing: From sample extraction to analyte sensing and readout signal generator. Biosens Bioelectron 2020; 170:112682. [PMID: 33035898 DOI: 10.1016/j.bios.2020.112682] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 12/20/2022]
Abstract
The last decade has seen a surge of technical developments in the field on point-of-care testing (POCT). While these developments are extremely diverse, the common aim is to implement improved methods for quick, reliable and inexpensive diagnosis of patients within the clinical setting. While examples of successful introduction and use of POCT techniques are growing, further developments are still necessary to create POCT devices with better portability, usability and performance. Advances in smart materials emerge as potentially valuable know-hows to provide a competitive edge to the development of next generation POCT devices. This review describes the key advantages of adopting smart material-based technologies at different analytical stages of a POCT platform. Under these analytical stages which involves sample pre-treatment, analyte sensing and readout signal generator, several concepts and approaches from contemporary research work in using smart material-based technologies will be the major focus in this review. Lastly, challenges and potential outlook in implementing materials technologies from the application point of view for POCT will be discussed.
Collapse
|
5
|
Vargas EL, Velázquez JA, Rodrigo E, Reinecke H, Rodríguez-Hernández J, Fernández-Mayoralas A, Gallardo A, Cid MB. p Ka Modulation of Pyrrolidine-Based Catalytic Polymers Used for the Preparation of Glycosyl Hydrazides at Physiological pH and Temperature. ACS APPLIED BIO MATERIALS 2020; 3:1955-1967. [PMID: 35025318 DOI: 10.1021/acsabm.9b01123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Inspired by the ability of enzymes to use the surrounding hydrophobic and/or polarizable groups to modulate the pKa of a given amino acid, we designed a series of soluble polymers able to decrease the basicity of pyrrolidine (from 11.2 to 8.6 pKa units), which clearly increases its aminocatalytic activity at physiological pH in C═N bond formation reactions via ion iminium activation. Other parameters such as charge density, hydrophobic/hydrophilic balance, and aggregation state have been studied as important factors in the catalytic activity of the polymers for a given substrate. To demonstrate the utility of our approach, an optimal pyrrolidine-based catalytic polymer has been used for the formation of C-N bonds between hydrazides and free sugars as the model system for the preparation of glycoconjugates.
Collapse
Affiliation(s)
- Emily L Vargas
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
| | - J Antonio Velázquez
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
| | - Eduardo Rodrigo
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
| | - Helmut Reinecke
- Instituto de Ciencia y Tecnologı́a de Polı́meros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Juan Rodríguez-Hernández
- Instituto de Ciencia y Tecnologı́a de Polı́meros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | | | - Alberto Gallardo
- Instituto de Ciencia y Tecnologı́a de Polı́meros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - María Belén Cid
- Department of Organic Chemistry, Universidad Autónoma de Madrid Cantoblanco, 28049 Madrid, Spain
| |
Collapse
|
6
|
Qian C, Asoh TA, Uyama H. Osmotic squat actuation in stiffness adjustable bacterial cellulose composite hydrogels. J Mater Chem B 2020; 8:2400-2409. [DOI: 10.1039/c9tb02880c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stimuli-responsive stiffness change and squat actuation were realized in bacterial cellulose hydrogels by utilizing internal osmotic pressure changes.
Collapse
Affiliation(s)
- Chen Qian
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- 2-1 Yamadaoka
- Suita
| | - Taka-Aki Asoh
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- 2-1 Yamadaoka
- Suita
| | - Hiroshi Uyama
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- 2-1 Yamadaoka
- Suita
| |
Collapse
|
7
|
Yin H, Cheng Q, Rosas R, Viel S, Monnier V, Charles L, Siri D, Gigmes D, Ouari O, Wang R, Kermagoret A, Bardelang D. A Cucurbit[8]uril 2:2 Complex with a Negative pK a Shift. Chemistry 2019; 25:12552-12559. [PMID: 31286592 DOI: 10.1002/chem.201902057] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/13/2019] [Indexed: 12/22/2022]
Abstract
A viologen derivative carrying a benzimidazole group (V-P-I 2+ ; viologen-phenylene-imidazole V-P-I) can be dimerized in water using cucurbit[8]uril (CB[8]) in the form of a 2:2 complex resulting in a negative shift of the guest pKa , by more than 1 pH unit, contrasting with the positive pKa shift usually observed for CB-based complexes. Whereas 2:2 complex protonation is unclear by NMR, silver cations have been used for probing the accessibility of the imidazole groups of the 2:2 complexes. The protonation capacity of the buried imidazole groups is reduced, suggesting that CB[8] could trigger proton release upon 2:2 complex formation. The addition of CB[8] to a solution containing V-P- I3+ indeed released protons as monitored by pH-metry and visualized by a coloured indicator. This property was used to induce a host/guest swapping, accompanied by a proton transfer, between V-P-I 3+ ⋅CB[7] and a CB[8] complex of 1-methyl-4-(4-pyridyl)pyridinium. The origin of this negative pKa shift is proposed to stand in an ideal charge state, and in the position of the two pH-responsive fragments inside the two CB[8] which, alike residues engulfed in proteins, favour the deprotonated form of the guest molecules. Such proton release triggered by a recognition event is reminiscent of several biological processes and may open new avenues toward bioinspired enzyme mimics catalyzing proton transfer or chemical reactions.
Collapse
Affiliation(s)
- Hang Yin
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
| | - Qian Cheng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
| | - Roselyne Rosas
- Aix Marseille Univ, CNRS, Spectropole, FR 1739, Marseille, France
| | - Stéphane Viel
- Aix Marseille Univ, CNRS, ICR, Marseille, France.,Institut Universitaire de France, Paris, France
| | - Valérie Monnier
- Aix Marseille Univ, CNRS, Spectropole, FR 1739, Marseille, France
| | | | - Didier Siri
- Aix Marseille Univ, CNRS, ICR, Marseille, France
| | | | | | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
| | | | | |
Collapse
|
8
|
Jiang L, Ye L. Nanoparticle-supported temperature responsive polymer brushes for affinity separation of histidine-tagged recombinant proteins. Acta Biomater 2019; 94:447-458. [PMID: 31055124 DOI: 10.1016/j.actbio.2019.04.056] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 04/25/2019] [Accepted: 04/25/2019] [Indexed: 01/14/2023]
Abstract
We developed a modular approach for the preparation of nanoparticle-supported polymer brushes carrying repeating iminodiacetate units for affinity separation of histidine-tagged recombinant proteins. The nanoparticle-supported polymer brushes were prepared via the combination of surface-initiated atom transfer radical polymerization with Cu(I)-catalyzed azide-alkyne cycloaddition reaction. The nanocomposite materials were characterized to determine the particle size, morphology, organic content, densities of polymer chains and the affinity ligand. Protein binding assay illustrated that the iminodiacetate-rich polymer brushes enable to selectively bind histidine-tagged recombinant proteins in the presence of abundant interfering proteins. More importantly, the protein binding capacity can be tuned by adjusting the environmental temperature. STATEMENT OF SIGNIFICANCE: The nanoparticle core-polymer brush structure enables selective binding of histidine-tagged recombinant proteins via multiple metal-coordination interactions. The soft and flexible structure of the polymer brushes was found beneficial for lowering the steric hindrance in protein binding. Taking advantage of the conformational changes of the polymer brushes at different temperatures, it is possible to modulate the protein binding on the nanocomposite by adjusting the environmental temperature. In general, the iminodiacetate-rich core-brush nano adsorbents are attractive for purifying histidine-tagged recombinant proteins practically. The synthetic approach reported here may be expanded to develop other advanced functional materials for applications in various biomedical fields ranging from biosensors to drug delivery.
Collapse
Affiliation(s)
- Lingdong Jiang
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, 221 00 Lund, Sweden
| | - Lei Ye
- Division of Pure and Applied Biochemistry, Department of Chemistry, Lund University, Box 124, 221 00 Lund, Sweden.
| |
Collapse
|