Quantifying Mechanical Abrasion of MWCNT Nanocomposites Used in 3D Printing: Influence of CNT Content on Abrasion Products and Rate of Microplastic Production.
Quantifying Mechanical Abrasion of MWCNT Nanocomposites Used in 3D Printing: Influence of CNT Content on Abrasion Products and Rate of Microplastic Production.
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DOI：
10.1021/acs.est.0c02015
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发表时间：
2021-08-03
影响因子：
11.4
通讯作者：
Wiesner, Mark R.
中科院分区：
文献类型：
--
作者：
Bossa, Nathan;Sipe, Joana Marie;Berger, William;Scott, Keana;Kennedy, Alan;Thomas, Treye;Hendren, Christine Ogilvie;Wiesner, Mark R.
人造纳米材料（MNM）作为“纳米填料”被掺入消费品中，以增强感兴趣的性能。多壁碳纳米管（MWCNTs）以其独特的性能而闻名，在聚合物中有许多应用。然而，在纳米使能产品生命周期期间多壁碳纳米管的释放是令人担忧的。在使用阶段，机械应力可能会产生含有MNM的碎片材料。MNM释放的程度，由此产生的暴露于这些材料，以及其释放的潜在影响是活跃的研究课题。在这项研究中，我们描述了方法上的改进，以研究含有MNM（纳米复合材料）的塑料的磨损，并报告所产生的磨损产品的特性和微塑料生产率。为这项工作开发的磨损装置允许测量功率输入，以确定缩放的释放速率。发现3D打印中使用的塑料的磨损率对于PETG聚合物为0.27 g/m2/s，对于2% MWCNT-PETG纳米复合材料为0.3 g/m2/s。嵌入式和突起的多壁碳纳米管似乎影响微塑料的粒径，形状，疏水性和表面电荷，而多壁碳纳米管的列入微塑料生产的影响很小。测量输入到磨损过程的功率为估计这些纳米复合材料的微塑性生产率提供了基础。
Manufactured nanomaterials (MNMs) are incorporated as “nanofillers” into consumer products to enhance properties of interest. Multiwalled carbon nanotubes (MWCNTs) are known for their unique properties and have many applications in polymers. However, the release of MWCNTs during the nano-enabled product lifecycle is concerning. During the use phase, mechanical stresses can produce fragmented materials containing MNMs. The degree of MNM release, the resulting exposure to these materials, and the potential impacts of their release are active research topics. In this study, we describe methodological improvements to study the abrasion of plastics containing MNMs (nanocomposites) and report on characteristics of abrasion products produced and rates of microplastic production. The abrasion device developed for this work allows for the measurement of power inputs to determine scaled release rates. Abrasion rates for plastics used in 3D printing were found to be 0.27 g/m2/s for the PETG polymer and 0.3 g/m2/s for the 2% MWCNT-PETG nanocomposite. Embedded and protuberant MWCNTs appeared to impact the particle size, shape, hydrophobicity, and surface charge of the microplastics, while the inclusion of MWCNTs had a small effect on microplastic production. Measurements of power input to the abrasion process provided a basis for estimating microplastic production rates for these nanocomposites.
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影响因子：
2.5
作者：
Huang, Guannan;Park, Jae Hong;Peters, Thomas M.
通讯作者：
Peters, Thomas M.
影响因子：
3.9
作者：
Chen, Tingting;Zhang, Jun;You, Hongjun
通讯作者：
You, Hongjun
纤维素纳米晶与碳纳米管纳米复合膜的亲水性和力学性能比较
影响因子：
11.4
作者：
Bai, Langming;Bossa, Nathan;Wiesner, Mark R.
通讯作者：
Wiesner, Mark R.
影响因子：
--
作者：
Alshammari, Basheer A.;Wilkinson, Arthur
通讯作者：
Wilkinson, Arthur
影响因子：
5
作者：
CLAYTON, P
通讯作者：
CLAYTON, P