Abstract
The article is devoted to solve the problem of modification of the non-returnable cotton and flax spinning waste in order to improve the physical and mechanical characteristics of composite heat-insulating plates based on these wastes. The modification of the vegetable filler with a 1% solution of sulfuric acid made it possible to increase the physical and mechanical indicators of plates. The thermal insulation properties of the composite plate material with some soft acid modification of the filler did not change significantly.
Highlights
Recycling including vegetable is one of the directions in resource-saving technologies
Secondary waste spinning manufactures unlike other vegetable materials are not used for the production of construction materials, this raw material is characterized by a number of valuable technical properties
To improve the strength of the composite plate material which is based on pulverized waste of flax and cotton, surface modification of cotton fibers can be used
Summary
Recycling including vegetable is one of the directions in resource-saving technologies. Pulverized non-returnable waste from vegetable fiber spinning can be used for the production of heat insulation plates if necessary operational properties are provided [4]. The properties of non-returnable pulverized spinning wastes are mostly determined by the fiber structure, physical properties, susceptibility to chemical influences. The reason for the insufficient strength of composites from pulverized wastes is the poor adhesion of the binder to the filler particles. This is due to the presence of fatty substances on the surface of the particles of flax and cotton. To improve the strength of the composite plate material which is based on pulverized waste of flax and cotton, surface modification of cotton fibers can be used. The most common methods of modifying vegetable fibers are alkaline or acid hydrolysis [9 - 14]
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