Water resistance of thermal insulation composites with cellulose-containing filler

Irina Susoeva,Tatiana Vakhnina,Andrey Titunin,Yuri Grunin,P Akimov,N Vatin,A Tusnin,A Doroshenko

doi:10.1051/e3sconf/202126301002

Abstract

One of the urgent tasks is the development of new thermal insulation materials to improve the energy efficiency of construction. In this work, new composites were obtained based on previously unused cellulose-containing waste. The theoretical and experimental substantiation of the possibility of increasing the water resistance of the heat-insulating composite has scientific significance. The features of the supramolecular structure of cellulose are analyzed. As a result of studies of the process of structure formation of a new heat-insulating material, it has been established that to ensure stable heat-insulating properties of composites from cellulose-containing waste, it is advisable to use a phenol-formaldehyde binder, water glass, or alumochromophosphate. The developed composite has a swelling 2.7 ... 3 times less, and water absorption 2.2 ... 2.4 times less than mineral wool slabs. The coefficient of thermal conductivity of the new composite material, depending on the type of cellulose-containing filler, ranges from 0.076 to 0.092 W/m∙K, which makes it possible to recommend it for use in thermal protection of buildings.

Highlights

The issues of ensuring sustainable innovative development of the construction industry, improving the energy efficiency of buildings and structures have been relevant for over 20 years
The use of cellulose-containing industrial waste in the production of heat-insulating materials solves the problems of developing resource-saving technologies
To ensure effective and stable thermal insulation properties, it is proposed to solve the problem of increasing the water resistance of composites from cellulose-containing waste by using hydrolytically stable binders

Summary

Introduction

The issues of ensuring sustainable innovative development of the construction industry, improving the energy efficiency of buildings and structures have been relevant for over 20 years. Fedosov and his colleagues, it is necessary to carry out the design of buildings, focused on reducing energy consumption [1]. At the same time, according to the scientists of the Moscow University of Civil Engineering, the new construction technological order should be based on the development of innovations in construction, focused on resource conservation and the use of new, previously unused resources [2]. The use of industrial waste for the production of new types of energy efficient materials solves, the problem of ensuring a stable state of the system "society - environment - construction site - ecosystem" [3]

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