Investigation on the Properties of PMMA/Reactive Halloysite Nanocomposites Based on Halloysite with Double Bonds

Abstract

PMMA/reactive halloysite nanocomposites were firstly prepared using reactive halloysite with double bonds. The halloysite was functionalized to improve its dispersion in the polymer matrix. The reactive halloysite could increase the molecular weight of PMMA. The molecular distribution of PMMA/reactive halloysite nanocomposite was more uniform than that of PMMA. The moisture absorption of PMMA/reactive halloysite nanocomposite increased with the addition of the reactive halloysite. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) confirmed that the thermal stability of PMMA/reactive halloysite nanocomposites was greatly enhanced. Significant improvement in the mechanical property of PMMA nanocomposites was achieved by the addition of 3 wt % reactive halloysite. A 31.1% increase in tensile strength and a 64.2% increase in Young' modulus of the nanocomposites with 3 wt % of the reactive halloysite were achieved. Finally, the formation mechanism of PMMA/reactive halloysites nanocomposites was proposed. This approach demonstrated the potential for general applicability to other polymer nanocomposites.

Gram‐Scale Bottom‐Up Synthesis of Macrographene

“…Powder X‐ray diffraction data for the materials are presented in Figure . CAP exhibited several peaks in the 10–50° range and the pattern is similar to the those exhibited by organic polymers . The well‐separated peaks at 2θ=23, 26 and 29° can be attributed to the presence of mean d 002 spacings of 3.85, 3.39 and 3.09 Å .…”

“…The CAP was subjected to Scholl oxidation in 2:1 AlCl 3 ‐NaCl melt at 165 °C for 6 h. The reaction mixture was quenched with water and worked up to get MG in good yields (see supporting information (SI) for details of synthesis). We have applied a variety of techniques (FTIR, UV‐Vis, XPS, Raman, XRD, TEM and AFM) for characterization of the product, and the data obtained were compared with literature to confirm our assignment of the product as graphene sheets.…”

Preparation and Properties of the Urea-Formaldehyde Res-In/Reactive Halloysite Nanocomposites Adhesive with Low-Formaldehyde Emission and Good Water Resistance

“…The surface of HNTs was smooth, while the surface of TH-HNTs became rough. This is because the coupling agent covered the HNTs [ 60 ]. It could be seen from (c) that UF were the irregular particle.…”

Halloysite Nanotubes as an Additive to Ensure Enhanced Characteristics of Cold-Curing Epoxy Resins under Fire Conditions

“…In comparison with kaolin or montmorillonite, HNTs can be relatively easily dispersed in water or polar polymers due to their tubular morphology, charge distribution, and unique crystal structure [ 19 ] and thus form a suitable substance, inter alia, for biopolymer materials [ 20 ]. A general literature search focused on the polymer materials with HNTs led to the finding, that a considerable number of studies dealing with the thermal properties of polymer/HNTs composites have already been published [ 21 , 22 , 23 , 24 ]. Some studies [ 25 , 26 ] also emphasized a positive effect on fire resistance of epoxy-based materials.…”