Enhanced Nucleation Rate of Polylactide in Composites Assisted by Surface Acid Oxidized Carbon Nanotubes of Different Aspect Ratios
文献类型：期刊论文
| 作者 | Xu, Zhaohua1,2,3; Niu, Yanhua3; Wang, Zhigang1,3; Li, Heng2; Yang, Liang3; Qiu, Jie3; Wang, Howard4 |
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2011-09-01 |
| 卷号 | 3期号:9页码:3744-3753 |
| 关键词 | Polylactide Carbon Nanotube Crystallization Aspect Ratio |
| ISSN号 | 1944-8244 |
| DOI | 10.1021/am200932q |
| 英文摘要 | Biodegradable polylactide (PLA) composites added with acid oxidized multiwalled carbon nanotubes (A-MWCNTs) of two different aspect ratios (length to diameter) were prepared by coagulation. The aspect ratios and surface structures of A-MWCNTs were characterized by TGA, Raman, and SEM measurements. The percolation thresholds for gelation in the PLA composites with A-MWCNTs of large and small aspect ratios are 2.5 and 4.0 wt %, respectively, which were determined by a rheological method, and in turn, the rheological result confirms the aspect ratio differences for the added two types of A-MWCNTs in the composites. Isothermal crystallization kinetics of neat PLA and its composites were further investigated by using polarized optical microscope (POM) and differential scanning calorimetry (DSC) to clarify the effects of A-MWCNTs of different aspect ratios and concentrations. The different aspect ratio A-MWCNTs with the same carboxyl group mass percent show substantial effects on PLA crystallization kinetics. Those with smaller aspect ratios enhance nucleation rate for PLA spherulites much more than those with larger aspect ratios. This phenomenon can be attributed to fewer sidewall carboxyl groups on the surfaces of A-MWCNTs with smaller aspect ratios, which provides more nucleation sites for PLA crystallization than those with larger aspect ratios at the same concentration, resulting in faster PLA nucleation rates for the former one. |
| 语种 | 英语 |
| WOS记录号 | WOS:000295236900073 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/73079]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wang, Zhigang |
| 作者单位 | 1.Univ Sci & Technol China, CAS Key Lab Soft Matter Chem, Dept Polymer Sci & Engn, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China 2.Jiangmen Polytech, Dept Mat Technol, Jiangmen 529090, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China 4.SUNY Binghamton, Dept Mech Engn, Binghamton, NY 13902 USA |
| 推荐引用方式 GB/T 7714 | Xu, Zhaohua,Niu, Yanhua,Wang, Zhigang,et al. Enhanced Nucleation Rate of Polylactide in Composites Assisted by Surface Acid Oxidized Carbon Nanotubes of Different Aspect Ratios[J]. ACS APPLIED MATERIALS & INTERFACES,2011,3(9):3744-3753. |
| APA | Xu, Zhaohua.,Niu, Yanhua.,Wang, Zhigang.,Li, Heng.,Yang, Liang.,...&Wang, Howard.(2011).Enhanced Nucleation Rate of Polylactide in Composites Assisted by Surface Acid Oxidized Carbon Nanotubes of Different Aspect Ratios.ACS APPLIED MATERIALS & INTERFACES,3(9),3744-3753. |
| MLA | Xu, Zhaohua,et al."Enhanced Nucleation Rate of Polylactide in Composites Assisted by Surface Acid Oxidized Carbon Nanotubes of Different Aspect Ratios".ACS APPLIED MATERIALS & INTERFACES 3.9(2011):3744-3753. |
入库方式： OAI收割
来源：化学研究所
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