In‐situ modification of nanodiamonds by mercapto‐terminated silane agent for enhancing the mechanical interfacial properties of nitrile butadiene rubber nanocomposites

Abstract

(3‐Mercaptopropyl)trimethoxysilane (MPTMS)‐ethanol‐solution‐treated nitrile butadiene rubber/nanodiamond (NBR/ND) polymer‐matrix nanocomposites were prefabricated in situ using a facile environmentally friendly one‐pot design. The MPTMS‐modified ND (MND) and pristine ND were characterized using wide‐angle X‐ray diffraction, Fourier‐transform infrared spectroscopy, transmission electron microscopy, N2 adsorption analysis, thermal gravimetric analysis, and X‐ray photoelectron spectroscopy. The pristine ND exhibited a high specific surface area and abundant active organic groups, especially hydroxyl and carboxyl groups, thus confirming its hydrophilic properties. The successful fabrication of surface‐modified MND was also verified. The fracture surface morphologies of the NBR/MND nanocomposites were analyzed using high‐resolution scanning electron microscopy and field‐emission transmission electron microscopy, and the dynamic rheological properties of the NBR/MND nanocomposites were characterized using a rubber processing analyzer. The NBR/MND composites exhibited superior mechanical properties, which were attributed to the strong interfacial interaction of the MND particles with the NBR matrix via MPTMS linking. POLYM. COMPOS., 39:3472–3481, 2018. © 2017 Society of Plastics Engineers

Material‐related losses of natural rubber composites with surface‐modified nanodiamonds

“…The intensity of the peaks suggests an extensive shell formation around ND clusters especially for ND‐TESPD powder. Peaks at 1275 cm −1 correspond to a SiC stretching . Modification with ND‐VTMS is further confirmed by the appearance of peaks at 3062, 1601, and 985 cm −1 due to the CC bond, and 749 cm −1 due to CH bend of the vinyl group .…”

Strong Interface Construction of Carbon Fiber–reinforced PEEK Composites: An Efficient Method for Modifying Carbon Fiber with Crystalline PEEK

“…[30] For the high molecular weight molecules, although it provides sufficient shear strength, worse property of wetting into the surface grooves lead it to be unable to "catch" the fiber tightly [31] , and this loose interphase can not transfer stress to the fiber effectively. [32,33] In more detail, a smooth released PEEK sizing agent layer can be seen from Figure S1 (Supporting Information), and there are no band-like protrusions on the released layer that match the fiber surface grooves, demonstrating that the large molecular weight sizing agent is not penetrated into the surface grooves, which causes that IFSS of PEEK-20-0.5 is slightly lower than IFSS of PEEK-100-0.75. This conclusion is consistent with the SEM after the fiber is pulled out, there is little residual resin on the surface of the fiber (Figure 4c2).…”

Interfacial shear strength of opaque resin/carbon fiber based on mapping from energy dispersive X‐ray spectroscopy

“…Thus single‐fiber fragmentation test is usually done with the aid of polarizing microscope to observe the situation of fiber fragmentation. Now, the applications of inorganic fillers (such as carbon nanotubes, graphene, graphene oxide, SiO 2 , Al 2 O 3 , montmorillonite, and nanodiamonds) in matrix modification have been very common in the actual production and application of composites. Due to the presence of modified materials in the matrix, the composites become opaque.…”