材料科学
纳米材料
碳纳米管
纳米复合材料
纳米技术
表面改性
聚合物
石墨烯
色散(光学)
纤维素
化学工程
水溶液
聚合物纳米复合材料
有机化学
化学
复合材料
工程类
物理
光学
作者
Mohammad Aramfard,Özge Kaynan,Ehsan Hosseini,Mohammad Zakertabrizi,Lisa M. Pérez,Amir Asadi
出处
期刊:Small
[Wiley]
日期:2022-07-28
卷期号:18 (37)
被引量:19
标识
DOI:10.1002/smll.202202216
摘要
Abstract Dispersing carbon nanomaterials in solvents is effective in transferring their significant mechanical and functional properties to polymers and nanocomposites. However, poor dispersion of carbon nanomaterials impedes exploiting their full potential in nanocomposites. Cellulose nanocrystals (CNCs) are promising for dispersing and stabilizing pristine carbon nanotubes (pCNTs) and graphene nanoplatelets (pGnP) in protic media without functionalization. Here, the underlying mechanisms at the molecular level are investigated between CNC and pCNT/pGnP that stabilize their dispersion in polar solvents. Based on the spectroscopy and microscopy characterization of CNCpCNT/pGnP and density functional theory (DFT) calculations, an additional intermolecular mechanism is proposed between CNC and pCNT/pGnP that forms carbonoxygen covalent bonds between hydroxyl end groups of CNCs and the defected sites of pCNTs/pGnPs preventing re‐agglomeration in polar solvents. This work's findings indicate that the CNC‐assisted process enables new capabilities in harnessing nanostructures at the molecular level and tailoring the performance of nanocomposites at higher length scales.
科研通智能强力驱动
Strongly Powered by AbleSci AI