国家/地区 中国（2）
IPC部 C（2）
IPC大类 C04（2）
IPC小类 C04B（2）
IPC
发明人
公开年
申请年 2021（2） 
专利权人 UNIV ZHEJIANG（2）

Preparing a porous material comprises e.g. preparing a solution to be frozen, patterning the surface of the cold source to obtain the surface of the cold source with a micro structure, pouring a solution to be frozen into a freezing mold and performing directional freezing.

GAO W, WANG M, ZHAO N, LI M, BAI H

Multi-stage foam sound absorbing black material comprises polymer foam framework and continuous graphene resonant cavity attached on framework.

XU Z, LIU X, GAO C, PANG K