Embedded Eggshells as a Bio-Filler in Natural Rubber for Thermal Insulation Composite Foams

作者：Tangboribbon Nuchnapa; Pannangpetch Wasirin; Aranyik Khomkrit; Petcharoen Karat; Sirivat Anuvat^*

来源：Progress in Rubber, Plastics and Recycling Technology, 2015, 31(3): 189-205.

DOI：10.1177/147776061503100304

• Construction composite materials
• Thermal insulation
• Eggshells
• Natural rubber foams
• Chlorinated polyethylene

Thermal insulation composite foams were prepared from the natural rubber as a matrix phase and an eggshell powder as a calcium carbonate dispersed phase, using chlorinated polyethylene acting as a flame retardant and curing agent at the vulcanization temperature 150 degrees C in a two-roll mill. The main composition of eggshell is calcium carbonate which is more than 96.35 wt%. The obtained composite rubber foams with 50 phr eggshell added possessed the thermal conductivity compression set, crosslink density bulk density and relative foam density values equal to 0.070 W/m.K, 45.0%, 6.95 x 10(-5)mol/cm(3), 0.58, and 0.63, respectively The obtained composite rubber foams were of good thermal resistance, good compression set, short curing time, good crosslink density and light weight, suitable for various applications such as automobiles, storage tank, and transport packaging. Furthermore, the scanning electron micrographs, X-ray diffraction patterns, specific heat, and physical properties (bulk density crosslink density and relative foam density) were taken or measured to investigate the microstructures, phase compositions, thermal properties, and characteristics of the insulating composite foams and were reported here.

• 出版日期2015