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Qin J, Li X, Lv Q, He M, Chen M, Xu Y, Chen X, Yu J. Selective dispersion of neutral nanoplates and the interfacial structure of copolymers based on coarse-grained molecular dynamics simulations. SOFT MATTER 2021; 17:5950-5959. [PMID: 34046651 DOI: 10.1039/d1sm00352f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The selective dispersion of neutral nanoplates (NNP) and the control of the interfacial structure of copolymers are challenging. In this work, we employ coarse-grained molecular dynamics (CGMD) to investigate the dispersion of NNP and the interfacial structure. The introduction of NNP significantly changes the interfacial structure and formation mechanism of diblock copolymers (DBCP), which is related to the matrix phase, distribution, composition, and length of two different chain segments (A and B) in AmBn-DBCP. The phase-weak groups that have a poor interaction with NNP will stack easily, whereas the stacking degree for the phase-rich groups that have a strong interaction with NNP decreases due to the addition of NNP. The interaction between two phases will be enhanced, which is favorable for the formation of a random network structure. Due to the strong interaction of the phase-rich groups with NNP, the NNP change the accumulation types of phase-weak groups and enhances the combination of two chain segments in favor of the formation of a cylindrical micelle-like structure. The transmission electron microscopy (TEM) images show that layered double hydroxide (LDH) orientationally distributes in the acrylic acid chain segments in ethylene acrylic acid (EAA) random copolymers, which is in agreement with the theoretical simulation results. This proves that the selective dispersion of LDH in copolymers affects their interfacial structure.
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Affiliation(s)
- Jun Qin
- College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China. and Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou Province, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
| | - Xing Li
- Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou Province, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
| | - Qing Lv
- Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou Province, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
| | - Min He
- College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
| | - Mengyu Chen
- Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou Province, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
| | - Yong Xu
- Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou Province, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China
| | - Xiaolang Chen
- Key Laboratory of Advanced Materials Technology Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Jie Yu
- College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China. and National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550058, China
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Li P, Dou X, Schönherr H. Micropatterning and nanopatterning with polymeric materials for advanced biointerface‐controlled systems. POLYM INT 2019. [DOI: 10.1002/pi.5770] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ping Li
- Department of Chemistry and Biology, Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cµ)University of Siegen Siegen Germany
| | - Xiaoqiu Dou
- Department of Chemistry and Biology, Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cµ)University of Siegen Siegen Germany
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and EngineeringShanghai Jiaotong University Shanghai China
| | - Holger Schönherr
- Department of Chemistry and Biology, Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cµ)University of Siegen Siegen Germany
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Liu X, Liu R, Gu Y, Ding J. Nonmonotonic Self-Deformation of Cell Nuclei on Topological Surfaces with Micropillar Array. ACS APPLIED MATERIALS & INTERFACES 2017; 9:18521-18530. [PMID: 28514142 DOI: 10.1021/acsami.7b04027] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Cells respond to the mechanical signals from their surroundings and integrate physiochemical signals to initiate intricate mechanochemical processes. While many studies indicate that topological features of biomaterials impact cellular behaviors profoundly, little research has focused on the nuclear response to a mechanical force generated by a topological surface. Here, we fabricated a polymeric micropillar array with an appropriate dimension to induce a severe self-deformation of cell nuclei and investigated how the nuclear shape changed over time. Intriguingly, the nuclei of mesenchymal stem cells (MSCs) on the poly(lactide-co-glycolide) (PLGA) micropillars exhibited a significant initial deformation followed by a partial recovery, which led to an "overshoot" phenomenon. The treatment of cytochalasin D suppressed the recovery of nuclei, which indicated the involvement of actin cytoskeleton in regulating the recovery at the second stage of nuclear deformation. Additionally, we found that MSCs exhibited different overshoot extents from their differentiated lineage, osteoblasts. These findings enrich the understanding of the role of the cell nucleus in mechanotransduction. As the first quantitative report on nonmonotonic kinetic process of self-deformation of a cell organelle on biomaterials with unique topological surfaces, this study sheds new insight into cell-biomaterial interactions.
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Affiliation(s)
- Xiangnan Liu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , Shanghai 200433, China
| | - Ruili Liu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , Shanghai 200433, China
| | - Yexin Gu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , Shanghai 200433, China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University , Shanghai 200433, China
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