Abstract: An amine aqueous solution for forming an active layer of a polyamide reverse osmosis composite membrane is prepared, which consists of 0.1 through 20 weight % of polyfunctional aromatic amine monomer, 0.1 through 20 weight % of multi-functional tertiary alcohol amine, 0.1 through 20 weight % of strong acid, and 40 through 99.7 weight % of water.

Abstract: A preparation method of a polyamide thin film composite reverse osmosis membrane and a polyamide thin film composite reverse osmosis membrane prepared using the preparation method are provided. The preparation method of a polyamide thin film composite reverse osmosis membrane using interfacial polymerization of an amine aqueous solution and amine-reactive compound includes the steps of (a) forming an active layer through interfacial polymerization by contacting a surface of a porous support with an amine aqueous solution containing a polyfunctional aromatic amine monomer and an organic solution containing polyfunctional acyl halide monomer as an amine-reactive compound, and (b) performing post-treatment preceded by the forming of the active layer by contacting the active layer with an aqueous solution containing 0.1 to 100 wt % of polyfunctional tertiary alcohol amine.

Abstract: The present invention relates to a system and method for sharing and controlling various contents in a voice call. A contents sharing system includes a soft switch and a contents share server. The soft switch receives a voice call from a VoIP terminal to set establishment and cancellation on a voice call session, receives a contents sharing request call, and transmits the same to the contents share server. The contents share server in cooperation with the soft switch receives the contents request call and processes establishment and cancellation on a data session for contents sharing between the callers. Accordingly, improved calling is provided by sharing various contents between the callers in a voice calling and thereby overcoming the problem of communication only available for voice.