Polymer Science Series B

, Volume 58, Issue 2, pp 173–182 | Cite as

The formation of ultralow-density microcellular diane-formaldehyde gels and aerogels

  • E. E. Sheveleva
  • V. G. Pimenov
  • I. V. Pikulin
  • A. M. Sakharov
Synthesis

Abstract

A diane–formaldehyde aerogel is synthesized via a new two-step approach consisting of the sol–gel polycondensation of diane and formaldehyde. The first stage affords individual polymethylol phenols; at the second stage, these are cured in an alkaline solution at 225°С via the introduction of an additional amount of formaldehyde. The diane–formaldehyde gel is isolated for the first time from the initial solution at a minimum possible concentration of gel formation of 1 mg/mL. The aerogel is obtained during supercritical drying of the diane–formaldehyde gel. The density of the ultralow-density microcellular aerogels reaches 10.9 mg/cm3, and their specific surface area amounts to 340–716 m2/g. The features, structures, and properties of the resulting diane–formaldehyde gels are studied.

Keywords

Formaldehyde Shrinkage Methylol Linear Shrinkage Formaldehyde Resin 

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Copyright information

© Pleiades Publishing, Ltd. 2016

Authors and Affiliations

  • E. E. Sheveleva
    • 1
  • V. G. Pimenov
    • 1
  • I. V. Pikulin
    • 2
  • A. M. Sakharov
    • 1
  1. 1.N.D. Zelinsky Institute of Organic ChemistryRussian Academy of SciencesMoscowRussia
  2. 2.Russian Federal Nuclear Center—All-Russia Research Institute of Experimental PhysicsSarov, Nizhny Novgorod oblastRussia

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