Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon Nanotubes
Poly-L-Lactic Acid (PLLA) is a bioabsorbable implant material due to its favorable biocompatibility and inherent degradability, while the insufficient mechanical strength hinders its further bone repair application. In present work, carbon nanotubes (CNTs) were introduced into PLLA scaffolds fabrica...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Polymer Technology |
| Online Access: | http://dx.doi.org/10.1155/2019/8625325 |
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| author | Guoyong Wang Fangwei Qi Wenjing Yang Youwen Yang Chongxian He Shuping Peng Cijun Shuai |
| author_facet | Guoyong Wang Fangwei Qi Wenjing Yang Youwen Yang Chongxian He Shuping Peng Cijun Shuai |
| author_sort | Guoyong Wang |
| collection | DOAJ |
| description | Poly-L-Lactic Acid (PLLA) is a bioabsorbable implant material due to its favorable biocompatibility and inherent degradability, while the insufficient mechanical strength hinders its further bone repair application. In present work, carbon nanotubes (CNTs) were introduced into PLLA scaffolds fabricated via selective laser sintering. It was found that the crystallinity of PLLA increased considerably since CNTs could promote the orderly stacking of its molecular chains, thereby improving the mechanical strength of PLLA scaffold. Furthermore, the fracture surface analysis revealed that CNTs acted as a bridge across the cracks and hindered their further expansion. Moreover, CNTs pulled out from the matrix to consume a large amount of fracture energy, which enhanced the resistance to external forces. As a consequence, the compressive strength, Vickers hardness and tensile strength of the scaffold were enhanced by 22.7%, 58.8% and 17.6%, respectively. Besides, the cells exhibited good attachment, spreading and proliferation on the scaffold. This study demonstrated that PLLA/CNTs scaffold was a promising candidate as bone implant. |
| format | Article |
| id | doaj-art-3fffc8f4935248db99e44a9ed9317528 |
| institution | Kabale University |
| issn | 0730-6679 1098-2329 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Polymer Technology |
| spelling | doaj-art-3fffc8f4935248db99e44a9ed93175282025-08-20T03:55:36ZengWileyAdvances in Polymer Technology0730-66791098-23292019-01-01201910.1155/2019/86253258625325Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon NanotubesGuoyong Wang0Fangwei Qi1Wenjing Yang2Youwen Yang3Chongxian He4Shuping Peng5Cijun Shuai6Jiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi University of Science and Technology, Ganzhou 341000, ChinaJiangxi University of Science and Technology, Ganzhou 341000, ChinaNHC Key Laboratory of Carcinogenesis and The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha, Hunan, ChinaJiangxi University of Science and Technology, Ganzhou 341000, ChinaPoly-L-Lactic Acid (PLLA) is a bioabsorbable implant material due to its favorable biocompatibility and inherent degradability, while the insufficient mechanical strength hinders its further bone repair application. In present work, carbon nanotubes (CNTs) were introduced into PLLA scaffolds fabricated via selective laser sintering. It was found that the crystallinity of PLLA increased considerably since CNTs could promote the orderly stacking of its molecular chains, thereby improving the mechanical strength of PLLA scaffold. Furthermore, the fracture surface analysis revealed that CNTs acted as a bridge across the cracks and hindered their further expansion. Moreover, CNTs pulled out from the matrix to consume a large amount of fracture energy, which enhanced the resistance to external forces. As a consequence, the compressive strength, Vickers hardness and tensile strength of the scaffold were enhanced by 22.7%, 58.8% and 17.6%, respectively. Besides, the cells exhibited good attachment, spreading and proliferation on the scaffold. This study demonstrated that PLLA/CNTs scaffold was a promising candidate as bone implant.http://dx.doi.org/10.1155/2019/8625325 |
| spellingShingle | Guoyong Wang Fangwei Qi Wenjing Yang Youwen Yang Chongxian He Shuping Peng Cijun Shuai Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon Nanotubes Advances in Polymer Technology |
| title | Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon Nanotubes |
| title_full | Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon Nanotubes |
| title_fullStr | Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon Nanotubes |
| title_full_unstemmed | Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon Nanotubes |
| title_short | Crystallinity and Reinforcement in Poly-L-Lactic Acid Scaffold Induced by Carbon Nanotubes |
| title_sort | crystallinity and reinforcement in poly l lactic acid scaffold induced by carbon nanotubes |
| url | http://dx.doi.org/10.1155/2019/8625325 |
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