NDLI: Exponentially increased nucleation ability for poly(L-lactide) by adding acid-oxidized multiwalled carbon nanotubes with reduced aspect ratios

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Exponentially increased nucleation ability for poly(L-lactide) by adding acid-oxidized multiwalled carbon nanotubes with reduced aspect ratios

Content Provider	Springer Nature Link
Author	Zhong, Yong Zhang, YaQiong Yang, JingJing Li, WenLin Wang, ZhiGang Xu, DongHua Chen, ShouYu Ding, YunSheng
Copyright Year	2012
Abstract	Acid-oxidized multiwalled carbon nanotubes (A-MWCNTs) with a range of reduced aspect ratios (from about 11 to 5.8) were obtained by acid oxidization of MWCNTs in the mixture of HNO$_{3}$ and H$_{2}$SO$_{4}$ for varying periods of 1, 3, 8 and 12 h, respectively. The aspect ratios and surface functionalization of A-MWCNTs were well characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and thermogravimetric analysis (TGA). Poly(L-lactide)/A-MWCNT composites containing 0.5 wt% A-MWCNTs with a range of reduced aspect ratios were prepared by solution cast. The effects of added A-MWCNTs on the isothermal crystallization kinetics of poly(L-lactide)/A-MWCNT composites were investigated by means of differential scanning calorimetry (DSC), rheology and polarized optical microscopy (POM). It is surprising to find that not only the addition of A-MWCNTs effectively increases the poly(L-lactide) (PLA) crystallization kinetics, but also the nucleation ability of A-MWCNTs for PLA crystallization exponentially increases with the reduced aspect ratio, that is to say, those with lower aspect ratios show much stronger nucleation ability for PLA crystallization than those with higher aspect ratios. The exponentially increased nucleation ability of A-MWCNTs with a range of reduced aspect ratios for PLA crystallization is disclosed.
Starting Page	181
Ending Page	194
Page Count	14
File Format	PDF
ISSN	16747291
Journal	Science in China Series B: Chemistry
Volume Number	56
Issue Number	2
e-ISSN	18691870
Language	English
Publisher	SP Science China Press
Publisher Date	2012-09-28
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	poly(L-lactide) MWCNTs aspect ratio nucleation Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

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Exponentially increased nucleation ability for poly(L-lactide) by adding acid-oxidized multiwalled carbon nanotubes with reduced aspect ratios

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Exponentially increased nucleation ability for poly(L-lactide) by adding acid-oxidized multiwalled carbon nanotubes with reduced aspect ratios