Abstract: An interpenetrating network hydrogel fireproof glass was developed to address the shortcomings of insufficient thermal insulation and weather resistance of polyacrylamide hydrogel fireproof glass. The interpe-netrating network hydrogel fireproof glass was prepared with polyacrylamide (PAM) as the first network and polyethylene glycol 2000(PEG2000) as the second network. The effects of PAM/PEG interpenetrating network structure on the light transmittance, thermal insulation and weather resistance of fireproof glass were studied by light transmittance tester, simultaneous thermal analysis-fourier transform infrared spectroscopy tester and cone heater. The results show that the construction of PAM/PEG interpenetrating network effectively improves the thermal insulation performance of fireproof glass while slightly maintaining a high degree of transparency affecting the light transmittance. Increasing the content of PEG2000 in PAM/PEG fireproof hydrogel can greatly promote the enhancement of interpenetrating network structure and endow fireproof glass with more excellent weather resistance. When the addition amount of PEG2000 is 4%, the fireproof glass shows excellent comprehensive performance. The backside equilibrium temperature at 3 600 s after 168 h artificial accelerated aging decreases by 46.0% compared to that of the fireproof glass without PEG2000.

Key words: polyacrylamide, polyethylene glycol, interpenetrating network, fireproof glass, fire resistance