Synthesis of humidity-conditioning mesoporous molecular sieves by using liquid-crystal display waste glass

During this analysis, liquid-crystal display (LCD) waste glass containing high SiO(2)and Al(2)O(3)contents was investigated as an alternative source for the synthesis of a humidity-conditioning Al-MCM-41 mesoporous molecular sieve (HC-Al-MCM-41). The hydrothermal method of synthesis involved the use of supernatants of LCD glass waste and the cationic surfactant cetyltrimethylammonium bromide as a structural controller. Chemically examined LCD waste glass was used in the HC-Al-MCM-41 preparation. Silicates were used as a matrix and as a source of Si and Al precursors in HC-Al-MCM-41 preparation. HC-Al-MCM-41 has a uniform pore network and a transparent, hexagonal arrangement of pores or honeycomb-like structures synthesized at a hydrothermal temperature of 105 degrees C. At 105 degrees C and 120 degrees C, the N(2)adsorption-desorption isotherms are commonly type IV, with the HC-Al-MCM-41 sampling characteristics of the hysteresis chain. The HC-Al-MCM-41 samples synthesized from LCD waste glass showed higher equilibrium moisture contents than mortars (0.8-1.6 m(3)/m(3)) and bricks (0.3-0.8 m(3)/m(3)) due to the ordered structure. When the hydrothermal reaction temperature was 105 degrees C (relative humidity = 95%), HC-Al-MCM-41 exhibited favorable mechanical properties and met JIS A 1475 intensity building materials specifications (equilibrium moisture content >5 m(3)/m(3)); therefore, HC-Al-MCM-41 can be used in several applications, especially as a humidity-conditioning material in construction.