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Huang Y, Wang N, Wang J, Ji X, Li A, Zhao H, Song W, Huang X, Wang T, Hao H. Unveiling the Factors Influencing Different Nucleation Pathways and Liquid-Liquid Phase Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:17786-17795. [PMID: 39120944 DOI: 10.1021/acs.langmuir.4c02276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/11/2024]
Abstract
Exploring nucleation pathways has been a research hot spot in the fields of crystal engineering. In this work, vanillin as a model compound was utilized to explore the factors influencing different nucleation pathways with or without liquid-liquid phase separation (LLPS). A thermodynamic phase diagram of vanillin in the mixed solvent system of water and acetone from 10 to 55 °C was determined. It was found that the occurrence of LLPS might be related to different nucleation pathways. Under the guidance of a thermodynamic phase diagram, Raman spectroscopy and molecular simulation were applied to investigate the influencing factors of different nucleation paths. It was found that the degree of solvation is a key factor determining the nucleation path, and strong solvation could lead to LLPS. Additionally, the molecular self-assembly evolution during the crystallization process was further investigated by using small-angle X-ray scattering (SAXS) and dynamic light scattering (DLS). The findings indicate that larger clusters with a diffuse transition layer may lead to LLPS during the nucleation process.
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Affiliation(s)
- Yunhai Huang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Na Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People's Republic of China
| | - Jingkang Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Xiongtao Ji
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Ao Li
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Hongtu Zhao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Wenxi Song
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
| | - Xin Huang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People's Republic of China
| | - Ting Wang
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People's Republic of China
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, People's Republic of China
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Prediction of Co-amorphous Formation Using Non-bonded Interaction Energy: Molecular Dynamic Simulation and Experimental Validation. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
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Huang Y, Wang J, Wang N, Li X, Ji X, Yang J, Zhou L, Wang T, Huang X, Hao H. Molecular mechanism of liquid–liquid phase separation in preparation process of crystalline materials. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118005] [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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Gurina DL, Budkov YA, Kiselev MG. Impregnation of Poly(methyl methacrylate) with Carbamazepine in Supercritical Carbon Dioxide: Molecular Dynamics Simulation. J Phys Chem B 2020; 124:8410-8417. [PMID: 32930588 DOI: 10.1021/acs.jpcb.0c05657] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fully atomistic molecular dynamics simulations are employed to study impregnation of the poly(methyl methacrylate) (PMMA) matrix with carbamazepine (CBZ) in supercritical carbon dioxide. The simulation box consists of 108 macromolecules of the polymer sample with the polymerization degree of 100, 57 molecules of CBZ, and 242,522 CO2 molecules. The simulation is performed at 333 K and 20 MPa. It is found that by the end of the simulation, the CBZ uptake reaches 1.09 wt % and 50 molecules are sorbed by PMMA. The main type of interaction between PMMA and CBZ is hydrogen bonding between the carbonyl oxygen of PMMA and the hydrogen atoms of the CBZ NH2-group. At the polymer surface, CBZ exists not only in the molecular form, as inside the polymer and in the bulk solution, but also in the form of dimers and trimers. The energy of formation of the hydrogen-bonded complexes is estimated within ab initio calculations.
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Affiliation(s)
- Darya L Gurina
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Street, Ivanovo 153045, Russian Federation
| | - Yury A Budkov
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Street, Ivanovo 153045, Russian Federation.,Tikhonov Moscow Institute of Electronics and Mathematics, National Research University Higher School of Economics, Tallinskaya st. 34, 123458 Moscow, Russian Federation
| | - Mikhail G Kiselev
- G.A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, 1 Akademicheskaya Street, Ivanovo 153045, Russian Federation
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Wang N, Huang X, Gong H, Zhou Y, Li X, Li F, Bao Y, Xie C, Wang Z, Yin Q, Hao H. Thermodynamic mechanism of selective cocrystallization explored by MD simulation and phase diagram analysis. AIChE J 2019. [DOI: 10.1002/aic.16570] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Na Wang
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
| | - Xin Huang
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
| | - Hao Gong
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical TechnologyTianjin University Tianjin China
| | - Yanan Zhou
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
| | - Xin Li
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
| | - Fei Li
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
| | - Ying Bao
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
| | - Chuang Xie
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
| | - Zhao Wang
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
| | - Qiuxiang Yin
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
| | - Hongxun Hao
- National Engineering Research Center of Industrial Crystallization TechnologySchool of Chemical Engineering and Technology, Tianjin University Tianjin China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
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Tam LH, Chow CL, Lau D. Moisture effect on interfacial integrity of epoxy-bonded system: a hierarchical approach. NANOTECHNOLOGY 2018; 29:024001. [PMID: 29057750 DOI: 10.1088/1361-6528/aa9537] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The epoxy-bonded system has been widely used in various applications across different scale lengths. Prior investigations have indicated that the moisture-affected interfacial debonding is the major failure mode of such a system, but the fundamental mechanism remains unknown, such as the basis for the invasion of water molecules in the cross-linked epoxy and the epoxy-bonded interface. This prevents us from predicting the long-term performance of the epoxy-related applications under the effect of the moisture. Here, we use full atomistic models to investigate the response of the epoxy-bonded system towards the adhesion test, and provide a detailed analysis of the interfacial integrity under the moisture effect and the associated debonding mechanism. Molecular dynamics simulations show that water molecules affect the hierarchical structure of the epoxy-bonded system at the nanoscale by disrupting the film-substrate interaction and the molecular interaction within the epoxy, which leads to the detachment of the epoxy thin film, and the final interfacial debonding. The simulation results show good agreement with the experimental results of the epoxy-bonded system. Through identifying the relationship between the epoxy structure and the debonding mechanism at multiple scales, it is shown that the hierarchical structure of the epoxy-bonded system is crucial for the interfacial integrity. In particular, the available space of the epoxy-bonded system, which consists of various sizes ranging from the atomistic scale to the macroscale and is close to the interface facilitates the moisture accumulation, leading to a distinct interfacial debonding when compared to the dry scenario.
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Affiliation(s)
- Lik-Ho Tam
- School of Transportation Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, People's Republic of China
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