Nacrelike Nanocomposite Films from Fluorescent Hyperbranched Poly(amido amine)s and Clay Nanosheets

Abstract

Inspired by the hierarchical structure of nacre, lots of functional nanocomposite films have been fabricated through finely tuning the composition and structure. To broaden their application in biological and biomedical research, it is highly demanded to develop a new strategy to fabricate nanocomposite films that are both biocompatible and functional. Herein, hyperbranched poly(amido amine)s (HPAMAMs) have been assembled with clay nanosheets. The obtained nanocomposite films show good mechanical performance and fluorescence properties. Analysis of the structure of the nanocomposite films indicates that the HPAMAMs and the clay nanosheets are stacked together in an orderly manner. The clay nanosheets align in the direction parallel to the film surface. Because of the inherent biocompatibility and autofluorescence property of the HPAMAMs, such composite films are thought to be very promising in applications requiring biocompatibility, fluorescence, and good mechanical performance. The method should provide a new route to the fabrication of functional nacrelike composite materials.[a] Prof.

Robust, antibacterial, and fluorescent hybrid films mimicking nacre

“…S7).The HPAMAM/nanoclay hybrid films are fluorescent. 11 Such an excellent property is well preserved by the Cu 2+ modified hybrid films. As shown in Fig.…”

“…11 Typically, MBA (11.57 g) and AEPZ (9.69 g) were added to a methanol/water mixture (7:3, v/v, 150 mL). The solution was heated to 50 °C, and let the monomers to react for 5 days.…”

“…1, the Cu 2+ -HPAMAM/nanoclay hybrid films were prepared in a similar procedure as indicated in the previous report, 11 but with some modification. Typically, the HPAMAM solutions were mixed with the exfoliated clay nanosheets suspensions for a period of time, and then centrifuged to obtain glue-like hybrids.…”

“…[3][4][5][6] For example, conductive or electromagnetic shielding nacre-like composites could be obtained through assembling graphene oxide and poly(vinyl alcohol); 7,8 nacre-like composites with light-emitting property could also be fabricated through integrating luminescent inorganic nanoplatelets with polymers, or by assembling fluorescent polymers with clay nanosheets. [9][10][11] However, the two-component systems cannot always meet the increasing demands for multiple functions.…”

White‐light‐emitting hybrid film from fluorescent hyperbranched poly(amido amine)

“…[19][20][21][22] For example, the doped ZnS nanoparticles were embedded in the poly(dimethyl siloxane) matrix. [28][29][30] Our group has utilized the HPAMAM to fabricate fluorescent hybrid films. 20 Nevertheless, they might be too flexible to be freestanding.…”