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含反应性组分的 PC/SAN 共混物中不同 CNT 的定位行为。

The Localization Behavior of Different CNTs in PC/SAN Blends Containing a Reactive Component.

机构信息

Leibniz-Institut für Polymerforschung Dresden e.V. (IPF Dresden), Hohe Str. 6, 01069 Dresden, Germany.

出版信息

Molecules. 2021 Mar 1;26(5):1312. doi: 10.3390/molecules26051312.

DOI:10.3390/molecules26051312
PMID:33804444
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7957507/
Abstract

Co-continuous blend systems of polycarbonate (PC), poly(styrene--acrylonitrile) (SAN), commercial non-functionalized multi-walled carbon nanotubes (MWCNTs) or various types of commercial and laboratory functionalized single-walled carbon nanotubes (SWCNTs), and a reactive component (RC, phenylmaleimide styrene maleic anhydride copolymer) were melt compounded in one step in a microcompounder. The blend system is immiscible, while the RC is miscible with SAN and contains maleic anhydride groups that have the potential to reactively couple with functional groups on the surface of the nanotubes. The influence of the RC on the localization of MWCNTs and SWCNTs (0.5 wt.%) was investigated by transmission electron microscopy (TEM) and energy-filtered TEM. In PC/SAN blends without RC, MWCNTs are localized in the PC component. In contrast, in PC/SAN-RC, the MWCNTs localize in the SAN-RC component, depending on the RC concentration. By adjusting the MWCNT/RC ratio, the localization of the MWCNTs can be tuned. The SWCNTs behave differently compared to the MWCNTs in PC/SAN-RC blends and their localization occurs either only in the PC or in both blend components, depending on the type of the SWCNTs. CNT defect concentration and surface functionalities seem to be responsible for the localization differences.

摘要

聚碳酸酯（PC）、苯乙烯-丙烯腈共聚物（SAN）、商业非功能化多壁碳纳米管（MWCNTs）或各种商业和实验室功能化单壁碳纳米管（SWCNTs）与反应性成分（RC，苯乙烯-马来酸酐共聚物）的共连续共混体系在微型混合机中一步熔融共混。该共混体系为不混溶体系，而 RC 与 SAN 混溶，并且含有马来酸酐基团，有与纳米管表面的官能团进行反应性偶联的潜力。通过透射电子显微镜（TEM）和能量过滤 TEM 研究了 RC 对 MWCNTs 和 SWCNTs（0.5wt%）的定位的影响。在没有 RC 的 PC/SAN 共混物中，MWCNTs 定位在 PC 组分中。相比之下，在 PC/SAN-RC 中，MWCNTs 取决于 RC 浓度定位在 SAN-RC 组分中。通过调整 MWCNT/RC 比，可以调节 MWCNTs 的定位。与 PC/SAN-RC 共混物中的 MWCNTs 相比，SWCNTs 的行为不同，其定位要么仅在 PC 中，要么在两个共混物组分中，这取决于 SWCNTs 的类型。碳纳米管缺陷浓度和表面官能团似乎是导致定位差异的原因。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/46cfab0e324b/molecules-26-01312-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/681cadb03fab/molecules-26-01312-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/453f176b67e0/molecules-26-01312-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/25df4e385590/molecules-26-01312-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/50f6a6b6ff66/molecules-26-01312-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/f69ad5930e30/molecules-26-01312-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/2b831232fe68/molecules-26-01312-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/f32d8bb4b9b1/molecules-26-01312-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/02323f6511b4/molecules-26-01312-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/b318d2a33374/molecules-26-01312-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/46cfab0e324b/molecules-26-01312-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/681cadb03fab/molecules-26-01312-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/453f176b67e0/molecules-26-01312-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/25df4e385590/molecules-26-01312-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/50f6a6b6ff66/molecules-26-01312-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/f69ad5930e30/molecules-26-01312-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/2b831232fe68/molecules-26-01312-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/f32d8bb4b9b1/molecules-26-01312-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/02323f6511b4/molecules-26-01312-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/b318d2a33374/molecules-26-01312-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/7957507/46cfab0e324b/molecules-26-01312-g010.jpg

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Selective localization of multiwalled carbon nanotubes in poly(epsilon-caprolactone)/polylactide blend.
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