1
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Song T, Wu X, Xu J, Ye H, Shi W. Two-Level Optical Birefringence Created by Evaporation-Induced Polymer Crystallization in Sessile Droplets. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Tiantian Song
- Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaoxue Wu
- Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jun Xu
- Advanced Materials Laboratory of Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Haimu Ye
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum, Beijing 102249, China
| | - Weichao Shi
- Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300071, China
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2
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Investigation on the crystallization behavior and detail spherulitic morphology of two crystal forms of thermoplastic polyurethanes. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03112-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Jiang J, Ao L. Risk evaluation and prevention of China’s investment in countries along the belt and road. JOURNAL OF INTELLIGENT & FUZZY SYSTEMS 2022. [DOI: 10.3233/jifs-220709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The Belt and Road Initiative is a major Initiative proposed by Chinese President Xi Jinping in 2013. Research on the risk prevention and control of China’s financial investment in countries along the Belt and Road has become a very hot topic in the world. This research focuses on the risk evaluation methods and prevention and control countermeasures of China’s foreign investment under the Belt and Road Initiative. First, based on the analysis of the existing studies on economic investment evaluation, an intuitionistic fuzzy multi-attribute evaluation method based on entropy method and G1 method is proposed. The essence of the proposed method is to combine the intuitionistic fuzzy set theory with subjective and objective evaluation methods, which improves the disadvantage of the original evaluation method taking too much subjective factors into consideration. This study applies the proposed method to the economic risk evaluation of China’s outward foreign direct investment (OFDI), constructs a 17-indicator economic risk system, and uses this method to rank the importance of the 17 indicators. The more important contribution is that this paper not only achieves improvements at the theoretical level and innovation at the practical level, but also condenses the research conclusions into three pieces of countermeasures and suggestions on China’s investment in countries along the Belt and Road. This research can provide theoretical support for Chinese government to make financial investment decisions in countries along the Belt and Road, and can also help countries along the Belt and Road to actively integrate into the Belt and Road Initiative, and promote the high-quality social and economic development of the countries along the Belt and Road.
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Affiliation(s)
- Jian Jiang
- Business School, Xinjiang University, Urumqi, China
| | - Li Ao
- Economics College, Renmin University of China, Beijing, China
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4
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Li B, Zhao Y, Chen X, Wang Z, Xu J, Shi W. Polymer Crystallization with Configurable Birefringence in Double Emulsion Droplets. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Baihui Li
- Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yue Zhao
- Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaotong Chen
- Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhiqi Wang
- Advanced Materials Laboratory of Ministry of Education, Department of Chemical Engineering, Tsinghua University, 100084 Beijing, China
| | - Jun Xu
- Advanced Materials Laboratory of Ministry of Education, Department of Chemical Engineering, Tsinghua University, 100084 Beijing, China
| | - Weichao Shi
- Key Laboratory of Functional Polymer Materials of Ministry of Education; Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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5
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Wang B, He K, Lu Y, Zhou Y, Chen J, Shen C, Chen J, Men Y, Zhang B. Nucleation Mechanism for Form II to I Polymorphic Transformation in Polybutene-1. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00885] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Binghua Wang
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Kangzhu He
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yaguang Lu
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yufeng Zhou
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jinlong Chen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Changyu Shen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jingbo Chen
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yongfeng Men
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Bin Zhang
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
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6
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Shi W, Chen X, Li B, Weitz DA. Spontaneous Creation of Anisotropic Polymer Crystals with Orientation-Sensitive Birefringence in Liquid Drops. ACS APPLIED MATERIALS & INTERFACES 2020; 12:3912-3918. [PMID: 31909961 DOI: 10.1021/acsami.9b17308] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It remains a grand challenge to prepare anisotropic crystal superstructures with sensitive optical properties in polymer science and materials field. This study demonstrates that semicrystalline polymers develop into anisotropic hollow spherulitic crystals spontaneously at interfaces of liquid drops. In contrast to conventional spherulites with centrosymmetric optics and grain boundaries, these anisotropic spherulitic crystals have vanished boundary defects, tunable aspect ratios, and noncentrosymmetric, orientation-sensitive birefringence. The experimental finding is elaborated in poly(l-lactic acid) crystals and is further verified in a broad class of semicrystalline polymers, irrespective of molecular chirality, chemical constitution, or interfacial modification. The facile methods and general mechanism revealed in this study shed light on developing new types of optical microdevices and synthesis of anisotropic semicrystalline particles from liquid emulsions.
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Affiliation(s)
- Weichao Shi
- Key Laboratory of Functional Polymer Materials (Ministry of Education) , Nankai University , Tianjin 300071 , China
- Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xiaotong Chen
- Key Laboratory of Functional Polymer Materials (Ministry of Education) , Nankai University , Tianjin 300071 , China
- Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Baihui Li
- Key Laboratory of Functional Polymer Materials (Ministry of Education) , Nankai University , Tianjin 300071 , China
- Institute of Polymer Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - David A Weitz
- John A. Paulson School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
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7
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Zhang L, Zhao G, Wang G. Investigation on the growth of snowflake-shaped Poly(l-Lactic acid) crystal by in-situ high-pressure microscope. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Nie H, Xiao W, Ma Y, Liu C, He A. High-Performance Isotactic Poly(1-butene)/Isotactic Polypropylene Alloys with in-Situ-Synthesized Poly(propylene- co-butene). Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00178] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huarong Nie
- Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education), School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Weijia Xiao
- Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education), School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Yaping Ma
- Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education), School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Chenguang Liu
- Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education), School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Aihua He
- Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education), School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
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9
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Agbolaghi S, Abbaspoor S, Abbasi F. A comprehensive review on polymer single crystals—From fundamental concepts to applications. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2017.11.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10
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Zhang R, Yan Y, Yang H, Yu X, Liu J, Zhang J, Han Y. The broken out and confinement phase separation structure evolution with the solution aggregation and relative crystallization degree in P3HT/N2200. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.01.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Emerson JA, Garabedian NT, Moore AC, Burris DL, Furst EM, Epps TH. Unexpected Tribological Synergy in Polymer Blend Coatings: Leveraging Phase Separation to Isolate Domain Size Effects and Reduce Friction. ACS APPLIED MATERIALS & INTERFACES 2017; 9:34480-34488. [PMID: 28945331 DOI: 10.1021/acsami.7b10170] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We employed a systematic processing approach to control phase separation in polymer blend thin films and significantly reduce dynamic friction coefficients (μ)s. We leveraged this modulation of phase separation to generate composite surfaces with dynamic friction coefficients that were substantially lower than expected on the basis of simple mixing rules, and in several cases, these friction coefficients were lower than those of both pure components. Using a model polyisoprene [PI]/polystyrene [PS] composite system, a minimum μ was found in films with PS mass fractions between 0.60 and 0.80 (μblend = 0.11 ± 0.03); that value was significantly lower than the friction coefficient of PS (μPS = 0.52 ± 0.01) or PI (μPI = 1.3 ± 0.09) homopolymers and was comparable to the friction coefficient of poly(tetrafluoroethylene) [PTFE] (μPTFE = 0.09 ± 0.01) measured under similar conditions. Additionally, through experiments in which the domain size was systematically varied at constant composition (through an annealing process), we demonstrated that μ decreased with decreasing characteristic domain size. Thus, the tribological synergy between PS and PI domains (discrete size, physical domain isolation, and overall film composition) was shown to play an integral role in the friction and wear of these PS/PI composites. Overall, our results suggest that even high friction polymers can be used to create low friction polymer blends by following appropriate design rules and demonstrate that engineering microstructure is critical for controlling the friction and adhesion properties of composite films for tribologically relevant coatings.
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Affiliation(s)
- Jillian A Emerson
- Department of Chemical & Biomolecular Engineering, University of Delaware , Newark, Delaware 19716, United States
| | - Nikolay T Garabedian
- Department of Mechanical Engineering, University of Delaware , Newark, Delaware 19716, United States
| | - Axel C Moore
- Department of Biomedical Engineering, University of Delaware , Newark, Delaware 19716, United States
| | - David L Burris
- Department of Mechanical Engineering, University of Delaware , Newark, Delaware 19716, United States
| | - Eric M Furst
- Department of Chemical & Biomolecular Engineering, University of Delaware , Newark, Delaware 19716, United States
| | - Thomas H Epps
- Department of Chemical & Biomolecular Engineering, University of Delaware , Newark, Delaware 19716, United States
- Department of Materials Science & Engineering, University of Delaware , Newark, Delaware 19716, United States
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12
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Crystallization kinetics and the fine morphological evolution of poly(ethylene oxide)/ionic liquid mixtures. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-017-1997-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Nie H, Liu D, Liu C, Wang X, He A. Morphology evolution in solution polymerized styrene-butadiene rubber (SSBR) / trans -1,4-polyisoprene (TPI) blends: SSBR particle formation, TPI crystal nucleation, growth and polymorphic form. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Woo EM, Tsai WT, Lugito G. Interior Dissection on Domain-Dependent Birefringence Types of Poly(3-hydroxybutyrate) Spherulites in Blends. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02306] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eamor M. Woo
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan
| | - Wan-Ting Tsai
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan
| | - Graecia Lugito
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan
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15
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Chen W, Wu L, Chen L, Qi Z, Li L. Influence of thermal history on crystalline morphologies of isotactic polypropylene in its miscible blends with polybutene-1. J Appl Polym Sci 2015. [DOI: 10.1002/app.43282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wei Chen
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry; University of Science and Technology of China; Hefei China
| | - Lihui Wu
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry; University of Science and Technology of China; Hefei China
| | - Liang Chen
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry; University of Science and Technology of China; Hefei China
| | - Zeming Qi
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry; University of Science and Technology of China; Hefei China
| | - Liangbin Li
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry; University of Science and Technology of China; Hefei China
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16
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Lugito G, Woo EM, Hsieh YT. Transitional Ring Bands Constructed by Discrete Positive- and Negative-Birefringence Lamellae Packed in Poly(1,6-hexamethylene adipate) Spherulites. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01981] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Graecia Lugito
- Department
of Chemical Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan, R.O.C
| | - Eamor M. Woo
- Department
of Chemical Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan, R.O.C
| | - Ya-Ting Hsieh
- Institute
for Materials Chemistry and Engineering, Kyushu University, 744
Motooka Nishi-ku, Fukuoka, Kyushu 819-0395, Japan
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17
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Fan J, Zhang Q, Feng J. Tuning the crystalline and mesophase structure of olefin block copolymer through self-nucleation and annealing treatments. Phys Chem Chem Phys 2015; 17:16158-69. [PMID: 26032333 DOI: 10.1039/c5cp00548e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As a type of novel semi-crystalline block copolymers, the final properties of olefin block copolymers (OBCs) greatly depend on the crystalline and phase-separated structures. In the present work, we systematically investigated the influence of self-nucleation and annealing on the lamellar and mesophase-separated structure of OBCs. According to the crystalline and melting behavior after self-nucleation and annealing treatments, four different regimes can be recognized with the self-seeding temperature Ts varying from 125 to 109 °C. In regime A, only self-nucleation occurs, while it coexists with lamellar thickening in regime B. In regime C, there is only lamellar thickening behavior. The lamellar thickening induced inconsecutive lamellar crystals observed revealed that the rearrangement of the hard blocks, which are next to the soft blocks and trapped in the intermediate regime between crystalline and amorphous phases, into neighboring lamellar crystals should be the mechanism for the lamellar thickening of the OBCs. Surprisingly, no lamellar thickening occurs and a new small melting peak appears at lower temperatures in regime D. Considering the block dispersity of OBCs, the emergence of a small melting peak at lower temperatures can be attributed to the crystallization of the ethylene sequence with relatively weaker crystallization abilities, which are not able to crystallize in a standard crystalline state. Based on these findings, we gained some new understandings on lamellar thickening behavior of OBCs and established the self-nucleation and annealing process as a powerful tool for tuning the crystalline and phase-separated structures of OBCs.
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Affiliation(s)
- Jiashu Fan
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
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18
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Shi W, McGrath AJ, Li Y, Lynd NA, Hawker CJ, Fredrickson GH, Kramer EJ. Cooperative and Sequential Phase Transitions in it-Poly(propylene oxide)-b-poly(ethylene oxide)-b-it-poly(propylene oxide) Triblock Copolymers. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00326] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | | | | | - Nathaniel A. Lynd
- McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
- Materials Sciences
Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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19
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Wang W, Huang Z, Laird ED, Wang S, Li CY. Single-walled carbon nanotube nanoring induces polymer crystallization at liquid/liquid interface. POLYMER 2015. [DOI: 10.1016/j.polymer.2014.12.063] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Lugito G, Yang CY, Woo EM. Phase-Separation Induced Lamellar Re-Assembly and Spherulite Optical Birefringence Reversion. Macromolecules 2014. [DOI: 10.1021/ma5011556] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Graecia Lugito
- Department of Chemical Engineering, National Cheng Kung University No. 1, University Road, Tainan, 701-01, Taiwan
| | - Chun-Yen Yang
- Department of Chemical Engineering, National Cheng Kung University No. 1, University Road, Tainan, 701-01, Taiwan
| | - Eamor M. Woo
- Department of Chemical Engineering, National Cheng Kung University No. 1, University Road, Tainan, 701-01, Taiwan
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21
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Bhowmik D, Pomposo JA, Juranyi F, García Sakai V, Zamponi M, Arbe A, Colmenero J. Investigation of a Nanocomposite of 75 wt % Poly(methyl methacrylate) Nanoparticles with 25 wt % Poly(ethylene oxide) Linear Chains: A Quasielatic Neutron Scattering, Calorimetric, and WAXS Study. Macromolecules 2014. [DOI: 10.1021/ma500215f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- D. Bhowmik
- Donostia International Physics
Center, Paseo Manuel de Lardizabal
4, 20018 San Sebastián, Spain
| | - J. A. Pomposo
- Centro de Física de Materiales (CSIC−UPV/EHU)
− Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento
de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain
- IKERBASQUE
- Basque Foundation for Science, Alameda
Urquijo 36, 48011 Bilbao, Spain
| | - F. Juranyi
- Laboratory for Neutron
Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
| | - V. García Sakai
- ISIS Facility, Rutherford Appleton Laboratory, Harwell Science & Innovation Campus, Chilton, Didcot OX11 0QX, United Kingdom
| | - M. Zamponi
- Jülich
Centre for Neutron Science, Forschungszentrum Jülich GmbH, outstation at Heinz
Maier-Leibnitz Zentrum, Lichtenbergstr. 1, 85747 Garching, Germany
| | - A. Arbe
- Centro de Física de Materiales (CSIC−UPV/EHU)
− Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - J. Colmenero
- Donostia International Physics
Center, Paseo Manuel de Lardizabal
4, 20018 San Sebastián, Spain
- Centro de Física de Materiales (CSIC−UPV/EHU)
− Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento
de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain
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22
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Shi W, Liu W, Yang J, He Z, Han CC. Hierarchical coarsening in the late stage of viscoelastic phase separation. SOFT MATTER 2014; 10:2649-2655. [PMID: 24647681 DOI: 10.1039/c3sm52713a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Coarsening is a general phenomenon in phase separating mixtures. In this study, we report a hierarchical coarsening at different length scales. Dispersed domains grew by direct combination of two/three small ones while some small domains can survive for a long time. The small angle laser light scattering showed that the scattered intensity exhibited multiple "decay-growth" transitions in the coarsening process. The evolution of the main peak gave a characteristic power law index of about -3/4, which is much faster than the -1/3 relationship from the traditional theories. We propose that relaxation and hydrodynamic flow play important roles in this process.
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Affiliation(s)
- Weichao Shi
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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23
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Li YF, Rubert M, Aslan H, Yu Y, Howard KA, Dong M, Besenbacher F, Chen M. Ultraporous interweaving electrospun microfibers from PCL-PEO binary blends and their inflammatory responses. NANOSCALE 2014; 6:3392-3402. [PMID: 24531205 DOI: 10.1039/c3nr06197c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Production of one dimensional nanomaterials with secondary morphology exhibiting unique functions is challenging. Here we report for the first time that a nanoscale immiscible polymer blend solution electrojet can assemble into ultraporous interweaving microfibers. This intriguingly novel morphology originated from a blend of polycaprolactone (PCL) and polyethylene oxide (PEO) in a DCM-DMF mixed solution when the ratio between each component reached a threshold and when the electrospinning parameters were delicately controlled. The morphology, crystallinity, surface chemistry and wettabilities were characterized to understand the mechanism of formation. The interplay of the two semi-crystalline polymers and the pair of solvents/non-solvents with the electrospinning processing parameters was found to be critical for the formation of the unique structure. Furthermore, the interesting combination of biocompatible, biodegradable PCL with protein-resistant PEO motivated us to assess its inflammation responses on the RAW 264.7 macrophage cell line. All fibers were found to be biocompatible with low inflammation potential upon incubation, while compared with pure PCL nanofibers; the unique interweaving microfibers induced a slightly higher inflammatory reaction.
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Affiliation(s)
- Yan-Fang Li
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, DK-8000 Aarhus C, Denmark.
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24
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He Z, Shi W, Chen F, Liu W, Liang Y, Han CC. Effective Morphology Control in an Immiscible Crystalline/Crystalline Blend by Artificially Selected Viscoelastic Phase Separation Pathways. Macromolecules 2014. [DOI: 10.1021/ma5001496] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhiyuan He
- State Key Laboratory of Polymer Physics and Chemistry,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Weichao Shi
- State Key Laboratory of Polymer Physics and Chemistry,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Fenghua Chen
- State Key Laboratory of Polymer Physics and Chemistry,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Wei Liu
- State Key Laboratory of Polymer Physics and Chemistry,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yongri Liang
- State Key Laboratory of Polymer Physics and Chemistry,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- College of Materials Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, P. R. China
| | - Charles C. Han
- State Key Laboratory of Polymer Physics and Chemistry,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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25
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Wang W, Li CY. Single-Walled Carbon Nanotube-Induced Orthogonal Growth of Polyethylene Single Crystals at a Curved Liquid/Liquid Interface. ACS Macro Lett 2014; 3:175-179. [PMID: 35590500 DOI: 10.1021/mz5000027] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We report herein single-walled carbon nanotube-induced polyethylene crystallization at the curved liquid/liquid interface. A Pickering emulsion system comprised of polyethylene (PE)/single-walled carbon nanotubes (SWCNTs)/1,2-dichlorobenzene (DCB)/water is formed using probe sonication at an elevated temperature. SWCNTs are used as the Pickering agents, and they are bent into nanosized rings by the curved DCB/water interface. Upon cooling, PE crystallizes onto SWCNTs, forming kebab single crystals, and the PE lamellae are orthogonal to the DCB/water interface. The unique structure resembles nanohybrid shish kebab (NHSK) rings.
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Affiliation(s)
- Wenda Wang
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Christopher Y. Li
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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26
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Zhang X, Ouyang Z, Schulze R, Keller TF, Jandt KD, Su Z. Pathway mediated microstructures and phase morphologies of asymmetric double crystalline co-oligomers. RSC Adv 2014. [DOI: 10.1039/c3ra47499b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Kabe T, Sato T, Kasuya KI, Hikima T, Takata M, Iwata T. Transition of spherulite morphology in a crystalline/crystalline binary blend of biodegradable microbial polyesters. POLYMER 2014. [DOI: 10.1016/j.polymer.2013.11.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Chen N, Yan LT, Xie XM. Interplay between Crystallization and Phase Separation in PS-b-PMMA/PEO Blends: The Effect of Confinement. Macromolecules 2013. [DOI: 10.1021/ma4005692] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nan Chen
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Li-Tang Yan
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Xu-Ming Xie
- Key Laboratory
of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
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29
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Shi W, Yang J, Liu W, Zhang L, Han CC. Anomalous Phase Separation Dynamics under Asymmetric Viscoelastic Effect: Where Fluidic and Elastic Properties Meet. Macromolecules 2013. [DOI: 10.1021/ma400032w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weichao Shi
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jingjing Yang
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Liu
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lina Zhang
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Charles C. Han
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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30
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Hsieh YT, Woo EM. Microscopic Lamellar Assembly and Birefringence Patterns in Poly(1,6-hexamethylene adipate) Packed with or without Amorphous Poly(vinyl methyl ether). Ind Eng Chem Res 2013. [DOI: 10.1021/ie303221c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ya-Ting Hsieh
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan
| | - Eamor M. Woo
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701-01, Taiwan
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31
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Shi W, Xie XM, Han CC. Frustrated Crystallization in the Coupled Viscoelastic Phase Separation. Macromolecules 2012. [DOI: 10.1021/ma301592a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Weichao Shi
- Beijing National Laboratory for Molecular
Sciences, Joint Laboratory of Polymer Science and Materials, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xu-Ming Xie
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Charles C. Han
- Beijing National Laboratory for Molecular
Sciences, Joint Laboratory of Polymer Science and Materials, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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32
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Lamellar assembly corresponding to transitions of positively to negatively birefringent spherulites in poly(ethylene adipate) with phenoxy. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2793-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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33
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Shi W, Chen F, Zhang Y, Han CC. Viscoelastic Phase Separation and Interface Assisted Crystallization in a Highly Immiscible iPP/PMMA Blend. ACS Macro Lett 2012; 1:1086-1089. [PMID: 35607043 DOI: 10.1021/mz300312e] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Polymer blends with dynamic asymmetry have attracted much interest recently. In this study, we report a more typical case where the dynamically asymmetric system is highly immiscible. We find that there is a transient network growth and phase inversion for the slow minor component. The network structure shows a hierarchical growth behavior, which is the result of competition between a slow relaxation-controlled concentration growth on local scale and a fast hydrodynamic growth on large scale. When phase separation couples with a subsequent crystallization, the interfacial boundary may assist lateral crystallization and irregular spherulites would grow epitaxially around the amorphous component-rich domains. The interface may play the role of substrates for heterogeneous nucleation. These phenomena may help us with morphological control in material processing.
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Affiliation(s)
- Weichao Shi
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Fenghua Chen
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yan Zhang
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Charles C. Han
- Beijing National Laboratory for Molecular
Sciences,
Joint Laboratory of Polymer Science and Materials, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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