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In this work, a great synergistic effect of 2D clay platelets and 1D carbon nanotubes (CNTs) on reinforcing chitosan matrix has been observed for the first time. With incorporation of 3 wt % clay and 0.4 wt % CNTs, the tensile strength and Young's modulus of the nanocomposites are significantly improved by about 171 and 124%, respectively, compared with neat chitosan. This could be understood as due to the formation of much jammed fillers network with 1D CNTs and 2D clay platelets combined together, as indicated by rheological measurement. Our work demonstrates a good example for the preparation of high performance polymer nanocomposites by using nanofillers of different dimension together.
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http://dx.doi.org/10.1021/jp709977m | DOI Listing |
ACS Omega
July 2025
Department of Mechanical Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1, Bunkyo-ku, Tokyo, 113-8656, Japan.
This study characterized the anisotropic thermal conductivity of clay/cellulose nanocomposites, an eco-friendly functional flame-retardant material exhibiting excellent mechanical properties, gas barrier properties, and biodegradability. Thermal conductivity anisotropy is important for flame-retardant materials. Low thermal conductivity in the through-thickness direction serves as a thermal barrier, whereas high thermal conductivity in the in-plane direction prevents local heat accumulation.
View Article and Find Full Text PDFPolymers (Basel)
June 2025
Department of Chemistry, Center for Nanotechnology at Chung Yuan Christian University, Chung Li 320314, Taiwan.
This study prepared epoxy-clay nanocomposites (ECNs) by incorporating organophilic clays modified with either non-redox cetyltrimethylammonium bromide (CTAB) or redox-active aniline pentamer (AP), then compared their anticorrosion performance on metal substrates in saline environments. The test solution contained 2 wt% alkaline copper quaternary (ACQ) wood preservatives. Cold-rolled steel (CRS) panels coated with the ECNs were evaluated via electrochemical impedance spectroscopy (EIS) in saline media both with and without ACQ.
View Article and Find Full Text PDFMaterials (Basel)
June 2025
School of Archaeology and Cultural Heritage, Zhengzhou University, Zhengzhou 450001, China.
This study systematically analyzes the composition and microstructure of Neolithic pottery unearthed from the Dazhuzhuang, Likou, and Biting Sites in the Yongcheng District using techniques such as X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), infrared spectroscopy (IR), and scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS). The results show that although the raw materials for pottery at the three sites were likely sourced from nearby ancient soil layers, significant differences in chemical composition and manufacturing techniques are evident. Pottery from the Dazhuzhuang Site is mainly composed of argillaceous gray pottery, with relatively loose raw material selection and a wide fluctuation in SiO content (64.
View Article and Find Full Text PDFJ Phys Chem C Nanomater Interfaces
October 2024
Department of Chemistry, University at Buffalo, SUNY, New York 14260, United States; The Institute for Lasers, Photonics, and Biophotonics, University at Buffalo, SUNY, New York 14260, United States.
Natural clays are the oldest example of two-dimensional materials and have been extensively investigated for their structural, morphological, and viscoelastic properties. Although there are reports of optical studies in clay-containing media, clay has traditionally been considered highly scattering, and thus, its optical and nonlinear optical applications have not been extensively examined. Nonlinear optics plays a key role across multiple fields of research and application, including biomedicine, photonics, optoelectronics, and surface science.
View Article and Find Full Text PDFLab Chip
July 2025
Engineering Research Center of Nano-Geomaterials of Ministry of Education, Laboratory of Advanced Mineral Materials, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
Kaolinite, a natural micro/nano clay material, exhibits remarkable effect on wound hemostasis, yet its efficacy is critically limited by heterogeneous particle sizes. Therefore, sorting based on size differences is essential to improve its performance. However, kaolinite with a layer structure presents challenges in sorting compared to spherical or elliptical materials, and the size distribution ranges continuously from nanometers to micrometers, which poses significant challenges for precise sorting.
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