Topological effect on mechanical properties of self-assembled block copolymer
Herein, this work aims to demonstrate the topological effect on the mechanicalx characteristics of self-assembled block copolymers (BCPs). The lamellae-forming polystyrene-block-polydimethylsiloxane (PS-b-PDMS) can be self-assembled into various nanostructured monoliths with the use of PS-selective...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Giant |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266654252300067X |
| _version_ | 1797248286804934656 |
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| author | Suhail K. Siddique Hassan Sadek Tsung-Lun Lee Gkreti-Maria Manesi Apostolos Avgeropoulos Chi-Wei Wang Chang-Chun Lee Edwin L. Thomas Rong-Ming Ho |
| author_facet | Suhail K. Siddique Hassan Sadek Tsung-Lun Lee Gkreti-Maria Manesi Apostolos Avgeropoulos Chi-Wei Wang Chang-Chun Lee Edwin L. Thomas Rong-Ming Ho |
| author_sort | Suhail K. Siddique |
| collection | DOAJ |
| description | Herein, this work aims to demonstrate the topological effect on the mechanicalx characteristics of self-assembled block copolymers (BCPs). The lamellae-forming polystyrene-block-polydimethylsiloxane (PS-b-PDMS) can be self-assembled into various nanostructured monoliths with the use of PS-selective solvent for solvent annealing, giving diamond, gyroid, and cylinder structures with increasing the swelling degree of PS domain (the effective volume fraction of the PS segment after solvent annealing followed by evaporation). The stiffness of the self-assembled monoliths is scrutinized by nanoindentation test. For intrinsic PS-b-PDMS monolith with lamellar structure, the reduced elastic modulus as calculated from the measured stiffness is 0.91 GPa. By contrast, the PS-b-PDMS monolith with cylinder structure gives a significant reduction in reduced elastic modulus with the value of 0.52 GPa due to the introduced microporosity to the PS domain from solvent annealing using PS-selective solvent, resulting in the lower confrontation for continuous layer-by-layer deformation of hard PS and soft PDMS domains. In the case of gyroid-structured PS-b-PDMS monolith, it is unexpected to exhibit a significant increase in the reduced elastic modulus with a value of 1.6 GPa: note that the effect of microporosity is still significant. Accordingly, the enhancement of the reduced elastic modulus is attributed to the effect of deliberate structuring with network topology (i.e., three-dimensional co-continuous hard PS and soft PDMS domains) that is able to hold the occurrence of large-scale deformation. In contrast to the gyroid with a three-strut texture, the diamond-structured PS-b-PDMS monolith with a four-strut texture is superior to the gyroid with a reduced elastic modulus of 2.2 GPa, further confirming the suggested topology effect. |
| first_indexed | 2024-03-11T11:15:38Z |
| format | Article |
| id | doaj.art-910e8ddc1a884a899fd11b5fe833d3cc |
| institution | Directory Open Access Journal |
| issn | 2666-5425 |
| language | English |
| last_indexed | 2024-04-24T20:12:11Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Giant |
| spelling | doaj.art-910e8ddc1a884a899fd11b5fe833d3cc2024-03-23T06:26:01ZengElsevierGiant2666-54252024-03-0117100205Topological effect on mechanical properties of self-assembled block copolymerSuhail K. Siddique0Hassan Sadek1Tsung-Lun Lee2Gkreti-Maria Manesi3Apostolos Avgeropoulos4Chi-Wei Wang5Chang-Chun Lee6Edwin L. Thomas7Rong-Ming Ho8Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, GreeceDepartment of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, GreeceDepartment of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Material Science and Nanoengineering, Texas A&M University, College Station, Texas, United StatesDepartment of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; Corresponding author.Herein, this work aims to demonstrate the topological effect on the mechanicalx characteristics of self-assembled block copolymers (BCPs). The lamellae-forming polystyrene-block-polydimethylsiloxane (PS-b-PDMS) can be self-assembled into various nanostructured monoliths with the use of PS-selective solvent for solvent annealing, giving diamond, gyroid, and cylinder structures with increasing the swelling degree of PS domain (the effective volume fraction of the PS segment after solvent annealing followed by evaporation). The stiffness of the self-assembled monoliths is scrutinized by nanoindentation test. For intrinsic PS-b-PDMS monolith with lamellar structure, the reduced elastic modulus as calculated from the measured stiffness is 0.91 GPa. By contrast, the PS-b-PDMS monolith with cylinder structure gives a significant reduction in reduced elastic modulus with the value of 0.52 GPa due to the introduced microporosity to the PS domain from solvent annealing using PS-selective solvent, resulting in the lower confrontation for continuous layer-by-layer deformation of hard PS and soft PDMS domains. In the case of gyroid-structured PS-b-PDMS monolith, it is unexpected to exhibit a significant increase in the reduced elastic modulus with a value of 1.6 GPa: note that the effect of microporosity is still significant. Accordingly, the enhancement of the reduced elastic modulus is attributed to the effect of deliberate structuring with network topology (i.e., three-dimensional co-continuous hard PS and soft PDMS domains) that is able to hold the occurrence of large-scale deformation. In contrast to the gyroid with a three-strut texture, the diamond-structured PS-b-PDMS monolith with a four-strut texture is superior to the gyroid with a reduced elastic modulus of 2.2 GPa, further confirming the suggested topology effect.http://www.sciencedirect.com/science/article/pii/S266654252300067XBlock copolymerSelf-assemblyTopology effectThin filmNanoindentationReduced elastic modulus |
| spellingShingle | Suhail K. Siddique Hassan Sadek Tsung-Lun Lee Gkreti-Maria Manesi Apostolos Avgeropoulos Chi-Wei Wang Chang-Chun Lee Edwin L. Thomas Rong-Ming Ho Topological effect on mechanical properties of self-assembled block copolymer Giant Block copolymer Self-assembly Topology effect Thin film Nanoindentation Reduced elastic modulus |
| title | Topological effect on mechanical properties of self-assembled block copolymer |
| title_full | Topological effect on mechanical properties of self-assembled block copolymer |
| title_fullStr | Topological effect on mechanical properties of self-assembled block copolymer |
| title_full_unstemmed | Topological effect on mechanical properties of self-assembled block copolymer |
| title_short | Topological effect on mechanical properties of self-assembled block copolymer |
| title_sort | topological effect on mechanical properties of self assembled block copolymer |
| topic | Block copolymer Self-assembly Topology effect Thin film Nanoindentation Reduced elastic modulus |
| url | http://www.sciencedirect.com/science/article/pii/S266654252300067X |
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