1
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Kocaman C, Batir O, Bukusoglu E. Optically responsive dry cholesteric liquid crystal marbles. J Colloid Interface Sci 2024; 671:374-384. [PMID: 38815373 DOI: 10.1016/j.jcis.2024.05.194] [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: 04/19/2024] [Revised: 05/22/2024] [Accepted: 05/25/2024] [Indexed: 06/01/2024]
Abstract
Dry liquid crystal marbles are structures that consist of cholesteric liquid crystal (CLC) droplets prepared by the mixture of chiral-doped thermotropic LCs encapsulated by cellulose nanocrystals (CNCs) that have been dried under ambient conditions. The characterizations revealed that CLC droplets were successfully encapsulated by self-standing CNC shells and responsive to the external gaseous stimulus. The dry LC marbles offer several advantages over previously reported LC-based gas sensors, such as fast response against minor external stimuli, and ease of handling, which make them particularly attractive for practical applications in sensing. We demonstrate the use of these marbles for detecting toluene vapor, a common industrial solvent and pollutant, which we also use to understand the response characteristics. The dry CLC marbles exhibit a significant response to toluene vapor with a detection limit below 500 ppm, attributed to the change of pitch size of the helical structure of CLC droplets induced by the toluene vapor. The CNC-capsulated CLC droplets were stable in emulsion for up to two weeks, and their dried form exhibited a sensitive response upon toluene exposure. The real-time experiments revealed that the LC marbles can be used multiple times without a significant loss of sensitivity, where 90 % of the maximum response was observed at 13.3 ± 4.7 s. These dry LC marbles can also be utilized in other areas, including drug delivery, optical devices, and biosensors.
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Affiliation(s)
- Ceren Kocaman
- Department of Chemical Engineering, Middle East Technical University, Dumlupınar Bulvarı No.1 Çankaya, Ankara, 06800, Turkiye; Laboratory of Advanced Separations (LAS), École Polytechnique Fédérale de Lausanne (EPFL), Sion 1950, Switzerland
| | - Ozge Batir
- Department of Chemical Engineering, Middle East Technical University, Dumlupınar Bulvarı No.1 Çankaya, Ankara, 06800, Turkiye
| | - Emre Bukusoglu
- Department of Chemical Engineering, Middle East Technical University, Dumlupınar Bulvarı No.1 Çankaya, Ankara, 06800, Turkiye.
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2
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Tao H, Rigoni C, Li H, Koistinen A, Timonen JVI, Zhou J, Kontturi E, Rojas OJ, Chu G. Thermodynamically controlled multiphase separation of heterogeneous liquid crystal colloids. Nat Commun 2023; 14:5277. [PMID: 37644027 PMCID: PMC10465492 DOI: 10.1038/s41467-023-41054-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 08/22/2023] [Indexed: 08/31/2023] Open
Abstract
Phase separation is a universal physical transition process whereby a homogeneous mixture splits into two distinct compartments that are driven by the component activity, elasticity, or compositions. In the current work, we develop a series of heterogeneous colloidal suspensions that exhibit both liquid-liquid phase separation of semiflexible binary polymers and liquid crystal phase separation of rigid, rod-like nanocellulose particles. The phase behavior of the multicomponent mixture is controlled by the trade-off between thermodynamics and kinetics during the two transition processes, displaying cholesteric self-assembly of nanocellulose within or across the compartmented aqueous phases. Upon thermodynamic control, two-, three-, and four-phase coexistence behaviors with rich liquid crystal stackings are realized. Among which, each relevant multiphase separation kinetics shows fundamentally different paths governed by nucleation and growth of polymer droplets and nanocellulose tactoids. Furthermore, a coupled multiphase transition can be realized by tuning the composition and the equilibrium temperature, which results in thermotropic behavior of polymers within a lyotropic liquid crystal matrix. Finally, upon drying, the multicomponent mixture undergoes a hierarchical self-assembly of nanocellulose and polymers into stratified cholesteric films, exhibiting compartmentalized polymer distribution and anisotropic microporous structure.
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Affiliation(s)
- Han Tao
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Vuorimiehentie 1, 02510, Espoo, Finland
| | - Carlo Rigoni
- Department of Applied Physics, Aalto University School of Science, Puumiehenkuja 2, 02150, Espoo, Finland
| | - Hailong Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Antti Koistinen
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Vuorimiehentie 1, 02510, Espoo, Finland
| | - Jaakko V I Timonen
- Department of Applied Physics, Aalto University School of Science, Puumiehenkuja 2, 02150, Espoo, Finland
| | - Jiancheng Zhou
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Eero Kontturi
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Vuorimiehentie 1, 02510, Espoo, Finland.
| | - Orlando J Rojas
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Vuorimiehentie 1, 02510, Espoo, Finland.
- Bioproducts Institute, Department of Chemical & Biological Engineering, Department of Chemistry and Department of Wood Science, The University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada.
| | - Guang Chu
- Department of Bioproducts and Biosystems, Aalto University School of Chemical Engineering, Vuorimiehentie 1, 02510, Espoo, Finland.
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
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3
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Huang L, Cao D, Pan J, Fang L, Wang Q, Chen D, Yang J. Metal‐Free Oxidative Double C(
sp
3
)−C(
sp
3
) Coupling of 1,3‐Dicarbonyl Compounds and
N,N
‐Dimethylanilines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ling Huang
- School of Pharmaceutical and Materials Engineering Taizhou University 1139 Shifu Road Taizhou 318000 People's Republic of China
| | - Dongdong Cao
- School of Pharmaceutical and Materials Engineering Taizhou University 1139 Shifu Road Taizhou 318000 People's Republic of China
| | - Jie Pan
- School of Pharmaceutical and Materials Engineering Taizhou University 1139 Shifu Road Taizhou 318000 People's Republic of China
| | - Lingjia Fang
- School of Pharmaceutical and Materials Engineering Taizhou University 1139 Shifu Road Taizhou 318000 People's Republic of China
| | - Qianqian Wang
- School of Pharmaceutical and Materials Engineering Taizhou University 1139 Shifu Road Taizhou 318000 People's Republic of China
| | - Dingben Chen
- School of Pharmaceutical and Materials Engineering Taizhou University 1139 Shifu Road Taizhou 318000 People's Republic of China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 People's Republic of China
| | - Jianguo Yang
- School of Pharmaceutical and Materials Engineering Taizhou University 1139 Shifu Road Taizhou 318000 People's Republic of China
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4
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He J, Bian K, Piao G. Self-assembly properties of carboxylated tunicate cellulose nanocrystals prepared by ammonium persulfate oxidation and subsequent ultrasonication. Carbohydr Polym 2020; 249:116835. [PMID: 32933679 DOI: 10.1016/j.carbpol.2020.116835] [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: 04/30/2020] [Revised: 07/12/2020] [Accepted: 07/26/2020] [Indexed: 12/20/2022]
Abstract
Tunicate cellulose, extracted from the marine animal, has drawn increasing attention as the high crystallinity and aspect ratio. However, it is hard to prepare tunicate cellulose nanocrystals (tCNCs) with narrow size distribution in the traditional way, especially for the carboxylated samples, which also affects their lyotropic liquid crystal behavior to a certain extent. Herein, carboxylated tCNCs with uniform nanoscale dimensions and high surface charges density were prepared through ammonium persulfate (APS) oxidation and ultrasonic post-processing. Of particular interest, the formation of carboxylated tCNCs lyotropic chiral nematic liquid crystals was observed for the first time, which displayed obvious birefringence and fingerprint texture. Meanwhile, it was found that the critical concentration of phase separation for tCNCs suspension was around 3.5 wt% from the phase diagram. This study provides an efficient way to fabricate carboxylated tCNCs, and the self-assembly properties may lead to great potential applications in constructing advanced functional materials.
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Affiliation(s)
- Jintao He
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology (QUST), Qingdao, 266042, China; School of Polymer Science and Engineering, QUST, Qingdao, 266042, China
| | - Kaiqiang Bian
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology (QUST), Qingdao, 266042, China; School of Polymer Science and Engineering, QUST, Qingdao, 266042, China
| | - Guangzhe Piao
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology (QUST), Qingdao, 266042, China; School of Polymer Science and Engineering, QUST, Qingdao, 266042, China.
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5
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Chen J, Wu W, Li Q, Wei W. Visible‐Light Induced C(
sp
3
)−H Functionalization for the Formation of C−N Bonds under Metal Catalyst‐Free Conditions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000448] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jin‐Yang Chen
- College of Chemistry and Chemical EngineeringYangtze Normal University Chongqing 408000 People's Republic of China
| | - Wenfeng Wu
- College of Chemistry and Materials EngineeringGuiyang University Guiyang 550005 People's Republic of China
| | - Qiang Li
- College of Chemistry and Materials EngineeringGuiyang University Guiyang 550005 People's Republic of China
- Institution of Functional Organic Molecules and MaterialsSchool of Chemistry and Chemical EngineeringLiaocheng University Liaocheng 252059 People's Republic of China
| | - Wen‐Ting Wei
- State Key Laboratory Base of Novel Functional Materials and Preparation ScienceSchool of Materials Science and Chemical EngineeringNingbo University Ningbo Zhejiang 315211 People's Republic of China
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6
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Martin P, Vasilyev G, Chu G, Boas M, Arinstein A, Zussman E. pH‐Controlled network formation in a mixture of oppositely charged cellulose nanocrystals and poly(allylamine). ACTA ACUST UNITED AC 2019. [DOI: 10.1002/polb.24898] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Patrick Martin
- Nano Engineering Group, Department of Mechanical Engineering, Technion, Israel Institute of Technology Haifa 32000 Israel
| | - Gleb Vasilyev
- Nano Engineering Group, Department of Mechanical Engineering, Technion, Israel Institute of Technology Haifa 32000 Israel
| | - Guang Chu
- Nano Engineering Group, Department of Mechanical Engineering, Technion, Israel Institute of Technology Haifa 32000 Israel
| | - Mor Boas
- Nano Engineering Group, Department of Mechanical Engineering, Technion, Israel Institute of Technology Haifa 32000 Israel
| | - Arkadii Arinstein
- Nano Engineering Group, Department of Mechanical Engineering, Technion, Israel Institute of Technology Haifa 32000 Israel
| | - Eyal Zussman
- Nano Engineering Group, Department of Mechanical Engineering, Technion, Israel Institute of Technology Haifa 32000 Israel
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7
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Zhang R, Chu G, Vasilyev G, Martin P, Camposeo A, Persano L, Pisignano D, Zussman E. Hybrid Nanocomposites for 3D Optics: Using Interpolymer Complexes with Cellulose Nanocrystals. ACS APPLIED MATERIALS & INTERFACES 2019; 11:19324-19330. [PMID: 31058491 PMCID: PMC6543505 DOI: 10.1021/acsami.9b01699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 05/06/2019] [Indexed: 05/03/2023]
Abstract
Manipulation of optical paths by three-dimensional (3D) integrated optics with customized stacked building blocks has gained considerable attention. Herein, we present functional thin films with assembly ability for 3D integrated optics based on nanocomposites made of cellulose nanocrystals (CNCs) embedded in hydrogen-bonded (H-bonded) interpolymer complexes (IPCs). We selected H-bonded IPC poly(ethylene oxide) and neutralized poly(acrylic acid) to render films assembly ability without undesired interplay with charge distribution in CNCs. The CNCs can form a stable chiral nematic liquid crystalline phase with long-range orientational order and helical organization. The resulting nanocomposites are characterized with a high elastic modulus of 8.8 GPa and an adhesion strength of 1.35 MPa through reversible intermolecular interactions at the contact interface upon exposure to acidic vapor. Instead, simply stacked into 3D optics, these functional thin films serve as a facile material for providing a conceptually simple approach to assemble 3D integrated optics with different liquid crystalline orderings to manipulate the light polarization state.
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Affiliation(s)
- Ruiyan Zhang
- NanoEngineering
Group, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Guang Chu
- NanoEngineering
Group, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Gleb Vasilyev
- NanoEngineering
Group, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Patrick Martin
- NanoEngineering
Group, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Andrea Camposeo
- NEST,
Instituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - Luana Persano
- NEST,
Instituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - Dario Pisignano
- Dipartimento
di Fisica “Enrico Fermi”, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
- NEST,
Istituto Nanoscience-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - Eyal Zussman
- NanoEngineering
Group, Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
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8
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Zeng H, Wu J, Ma Y, Ye Y, Liu J, Li X, Wang Y, Liao Y, Luo X, Xie X, Mai YW. Scalable Approach to Construct Self-Assembled Graphene-Based Films with An Ordered Structure for Thermal Management. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41690-41698. [PMID: 30354061 DOI: 10.1021/acsami.8b13808] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Large-area bulk oxidized cellulose nanocrystal (OCNC)/graphene nanocomposites with highly oriented structures were produced through a straightforward, cost-effective large-scale evaporation-induced self-assembly process followed by thermal curing. Well-aligned nano-sized graphene layers were evident and separated by the OCNC planar layers, which facilitate highly interconnected and continuous thermal transport parallel to the alignment. Hence, the laminated graphene-based nanocomposites possess an excellent in-plane thermal conductivity of 25.66 W/m K and a thermal conductivity enhancement (η) of 7235% with only a 4.1 vol % graphene loading. This value is the highest recorded among all laminated composite films with <70 wt % filler content reported to date. Using this design strategy, other large-area aligned composites with other functional nanomaterials, already in large-scale production, can be made for use in a wide range of applications.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Yiu-Wing Mai
- Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering J07 , The University of Sydney , Sydney , New South Wales 2006 , Australia
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9
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Direct synthesis of anthracenes from o-tolualdehydes and aryl iodides through Pd(II)-Catalyzed sp C H arylation and electrophilic aromatic cyclization. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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