“Shape-Coding”: Morphology-Based Information System for Polymers and Composites

Abstract

Fiber-reinforced composites have become the material of choice for aerospace structures because of their favorable strength-to-weight ratio. Given the increasing amounts of counterfeit composite parts showing up in the complex aerospace supply chain, it is absolutely vital to track a composite part throughout its lifecyclefrom production to usage and to disposal. Existing barcoding methods are invasive, affect the structural properties of composites, and/or are vulnerable to tampering. We describe a universal method to store information in fiber-reinforced composites based on solid-state in situ reduction leading to embedded nanoparticles with controlled morphologies. This simple, cost-effective, mild, surfactant-free, and one-step protocol for the fabrication of embedded platinum nanostructures leads to morphology-based barcodes for polymeric composites. We also describe a coding methodology wherein a 1 × 1 cm code can represent 3.4 billion parts to 95 trillion parts, depending on the resolution required along with access to morphology-based chemical encryption systems.

Storing and Reading Information in Mixtures of Fluorescent Molecules

“…This substrate contains reactive secondary amino groups ( Supporting Information , Figure S2). 38 The epoxy polymer is processed by hot-pressing a mixture of bisphenol A diglycidyl ether and triethylene tetramine at 120 °C between a glass coverslip and a flat PDMS surface (see Experimental Section ). We control the pressure (70 psi) to obtain 50-μm thick films ( Supporting Information , Figures S2 and S3).…”

“…We synthesized a cross-linked epoxy polymer with an excess of the amine curing agent. This substrate contains reactive secondary amino groups (Supporting Information, Figure S2) . The epoxy polymer is processed by hot-pressing a mixture of bisphenol A diglycidyl ether and triethylene tetramine at 120 °C between a glass coverslip and a flat PDMS surface (see Experimental Section).…”

Performance Evaluation of Cross-Linked Polyethylene Insulation of Operating 110 kV Power Cables

“…It usually leads to localized changes of the insulation material and subsequent degradation in these localized regions and then propagates through the insulation, ultimately leading to partial discharges and electrical treeing. Various experimental techniques such as Differential Scanning Calorimetry (DSC), X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Broadband dielectric spectroscopy, and AC breakdown strength measurements are expected to provide physical-chemical, microstructural, and electrical characterization of the XLPE insulation [ 2 ]. Additionally, we hope that these experimental techniques can provide ageing markers that can be used for the diagnosis and prognosis of ageing causing the degradation of cables, which can take place in service.…”

Click gold quantum dots biosynthesis with conjugation of quercetin for adenocarcinoma exertion

“…The main drawbacks of common synthesis routes for drugmetal complex are the employment of toxic chemicals and high temperatures, [32][33][34] pressure and energy, [35][36][37][38] so that new green and environmentally sustainable friendly strategies are needed.…”