Fabrication of Transparent Nanohybrids with Heat Resistance Using High-Density Amorphous Formation and Uniform Dispersion of Nanodiamond

Abstract

A new technology for the production of transparent material using a "crystalline" polymer is proposed in the present study. Further, transparent and flexible crystalline polymer nanohybrid film containing well-dispersed nanodiamond filler was fabricated. Partially fluorinated crystalline polymer with switchboard-type lamellae results in high transparency as a consequence of the formation of a high-density amorphous structure based on high-temperature drawing just below the melting point at 110 °C. Although the formation of nanohybrid materials composed of fluorinated-polymer/organo-modified nanocarbon is generally difficult, we confirmed the formation, via melt-compounding, using atomic force microscopy and wide-angle X-ray diffraction. Even though the polymer matrix/nanodiamond hybrid has remarkable aggregation properties, a well-dispersed state was achieved because of improvement in wettability obtained through surface modification of filler. The resulting nanohybrid demonstrates transparency, increased thermal degradation temperature, and enhanced mechanical properties, which seem to be derived from the nucleation effect caused by the adsorption of the terminal polymer chain onto the organic modifier.

Nano‐dispersion of organo‐modified nanofiller in partially fluorinated matrix as the polymer/magnetic nanoparticle composites

“…As described above, in previous studies , it was found that when high‐temperature drawing carried out for crystalline fluorinated polymers with switchboard‐type lamellae (Fig. b), the amorphous region is densified, and refraction of the transmitted light at the crystalline/amorphous interface is suppressed.…”

“…Actually, neat P(VDF‐TeFE) has high transparency after five drawing cycles at 110°C (Fig. d) . Indeed, one of the targets of this study is the maintenance of transparency in the nanohybrids.…”

“…The profile of P(VDF‐TeFE) clearly shows a (110), (200) convoluted peak, (020) reflection, and (111), (201) convoluted reflection. According to a previous report, the crystal system of neat P(VDF‐TeFE) is orthorhombic (β‐form, a = 9.13 Å, b = 5.27 Å, c = 2.51 Å) . Only the β‐form of the PVDF copolymer crystals shows ferroelectric properties .…”

“…The partially fluorinated polymer used as the matrix was poly[vinylidene‐ co ‐(tetrafluoroethylene)], referred to as P(VDF‐TeFE) ; see Supporting Information Fig. S1a.…”

Fabrication of Hierarchical Layer-by-Layer Assembled Diamond-based Core-Shell Nanocomposites as Highly Efficient Dye Absorbents for Wastewater Treatment

“…The chemical modification and functionalization of diamond composite materials with different compounds or nanoparticles are frequently needed to make them appropriate for good dispersion or with suitable function in various applications. For examples, various organic molecules including redox active ferrocene moiety5, long-chain fluorinated polymer6, poly(epsilon-caprolactone) (PCL)7, triethylene glycol (EG) and azide (−N 3 ) groups8, can be used to modify diamond to obtain surface grafted diamond by various chemical reactions. Interestingly, the modification of diamond powder with fluorinated or aminated surfaces as well as special core-shell structures (diamond as core and TiN as shell) were beneficial to the next applications as electrocatalysts910.…”