Natural Materials Utilized Artificial Cork Synthesis

Abstract

The depolymerized suberin derivatives (DSDs) were extracted from cork by environmentally-friendly alkaline hydrolysis. The stoichiometry control for the esterification of the DSDs was performed to determine an adequate amount of glycerol (5.87 wt%) by using 1H NMR. The expansion behavior of thermally expandable microspheres(TEMs) was characterized to form a closed-cell structure. Polyesterification of the DSDs and the expansion of TEMs were examined to synthesize the artificial cork (p-DSDs foam). The hysteresis energies of the p-DSDs foam and cork were 0.031 MJ/m3 and 0.012 MJ/m3, respectively, for 30% strain cyclic loading. This work could have a broad impact on enhancing the value of the recyclable natural materials and designing damping properties of the artificial cork foam material for various advanced applications, e.g., aerospace, automobile, and so on.

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Document Details

Document Type
Technical Report
Publication Date
Oct 26, 2020
Accession Number
AD1113330

Entities

People

  • Jonghwan Suhr

Organizations

  • Sungkyunkwan University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Carboxylic Acids
  • Cell Size
  • Cell Structure
  • Cellular Structures
  • Chemical Synthesis
  • Chemistry
  • Composite Materials
  • Engineering
  • Glass Transition Temperature
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Properties
  • Molecular Weight
  • Polymer Chemistry
  • Polymers
  • Resonance
  • Syntactic Foams
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Control Systems Engineering.
  • Electrochemical Surface Science
  • Petroleum Engineering

Technology Areas

  • Space