Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions
Nanofibers of poly(L-lactide-co-DL-Lactide) (PDLLAx) copolymers with DL-lactate (DLLA) contents of 0, 2.5, 7.5, and 50%, which exhibit strong structure/properties correlation, were fabricated by electrospinning. Effect of the copolymer structure and electrospinning conditions on morphology and prope...
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th-mahidol.336362018-11-09T09:29:07Z Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions Chakrit Thammawong Sutawan Buchatip Atitsa Petchsuk Pramuan Tangboriboonrat Noppavan Chanunpanich Mantana Opaprakasit Paiboon Sreearunothai Pakorn Opaprakasit Sirindhorn International Institute of Technology, Thammasat University National Metal and Materials Technology Center (MTEC) Mahidol University King Mongkut's University of Technology North Bangkok Chulalongkorn University Chemistry Materials Science Nanofibers of poly(L-lactide-co-DL-Lactide) (PDLLAx) copolymers with DL-lactate (DLLA) contents of 0, 2.5, 7.5, and 50%, which exhibit strong structure/properties correlation, were fabricated by electrospinning. Effect of the copolymer structure and electrospinning conditions on morphology and properties of the fibers were examined by SEM, DSC, XRD, and tensile measurements. Bead-free fibers of PDLLAx prepared from a DMF/CHCl3 mixed solvent are roughly 10-times smaller in size (600-800 nm), with lower degree of surface porosity, compared to those of CHCl 3. When CHCl3 is employed, an increase in size (2.4-5.5 μm) and surface porosity (0-45%) with relative humidity value is observed in crystallizable copolymers, whereas an amorphous copolymer shows a reverse trend. Thermal properties and chain arrangements of the electrospun fibers are critically affected by DLLA content of the copolymers and electrospinning conditions, as a result from interplay between intermolecular and intramolecular hydrogen bonding. Contents of crystalline domains and "physical crosslinks" generated from DL lactate segments are proposed as the origin of this phenomenon. Fiber mats of PDLLA with 50% DLLA content show a large improvement in all aspects of mechanical properties, which are suitable for various biomedical applications. © 2013 Society of Plastics Engineers. 2018-11-09T02:06:38Z 2018-11-09T02:06:38Z 2014-02-01 Article Polymer Engineering and Science. Vol.54, No.2 (2014), 472-480 10.1002/pen.23576 15482634 00323888 2-s2.0-84892371555 https://repository.li.mahidol.ac.th/handle/123456789/33636 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84892371555&origin=inward |
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Chemistry Materials Science Chakrit Thammawong Sutawan Buchatip Atitsa Petchsuk Pramuan Tangboriboonrat Noppavan Chanunpanich Mantana Opaprakasit Paiboon Sreearunothai Pakorn Opaprakasit Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions |
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Nanofibers of poly(L-lactide-co-DL-Lactide) (PDLLAx) copolymers with DL-lactate (DLLA) contents of 0, 2.5, 7.5, and 50%, which exhibit strong structure/properties correlation, were fabricated by electrospinning. Effect of the copolymer structure and electrospinning conditions on morphology and properties of the fibers were examined by SEM, DSC, XRD, and tensile measurements. Bead-free fibers of PDLLAx prepared from a DMF/CHCl3 mixed solvent are roughly 10-times smaller in size (600-800 nm), with lower degree of surface porosity, compared to those of CHCl 3. When CHCl3 is employed, an increase in size (2.4-5.5 μm) and surface porosity (0-45%) with relative humidity value is observed in crystallizable copolymers, whereas an amorphous copolymer shows a reverse trend. Thermal properties and chain arrangements of the electrospun fibers are critically affected by DLLA content of the copolymers and electrospinning conditions, as a result from interplay between intermolecular and intramolecular hydrogen bonding. Contents of crystalline domains and "physical crosslinks" generated from DL lactate segments are proposed as the origin of this phenomenon. Fiber mats of PDLLA with 50% DLLA content show a large improvement in all aspects of mechanical properties, which are suitable for various biomedical applications. © 2013 Society of Plastics Engineers. |
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Sirindhorn International Institute of Technology, Thammasat University |
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Sirindhorn International Institute of Technology, Thammasat University Chakrit Thammawong Sutawan Buchatip Atitsa Petchsuk Pramuan Tangboriboonrat Noppavan Chanunpanich Mantana Opaprakasit Paiboon Sreearunothai Pakorn Opaprakasit |
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Article |
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Chakrit Thammawong Sutawan Buchatip Atitsa Petchsuk Pramuan Tangboriboonrat Noppavan Chanunpanich Mantana Opaprakasit Paiboon Sreearunothai Pakorn Opaprakasit |
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Chakrit Thammawong |
title |
Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions |
title_short |
Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions |
title_full |
Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions |
title_fullStr |
Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions |
title_full_unstemmed |
Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions |
title_sort |
electrospinning of poly(l-lactide-co-dl-lactide) copolymers: effect of chemical structures and spinning conditions |
publishDate |
2018 |
url |
https://repository.li.mahidol.ac.th/handle/123456789/33636 |
_version_ |
1763495331481255936 |