国家/地区 中国（2）
IPC部 A（2）
IPC大类 C01（2）
IPC小类 C01B（2）
IPC
发明人
公开年
申请年
专利权人 UNIV CHINA ELECTRONIC SCI TECHNOLOGY（2）

Noise reduction earplug comprises shell comprising substrate and graphene coating coated on outer side of substrate, and having inner portion filled with sound absorbing material.

RAN Y

Preparing activated carbon involves collecting fresh silkworm generated after feeding graphene to silkworm, drying and removing impurities, crushing dried silkworm in tubular furnace under protection of inert gas for heating precarbonizing.

WU M, CHEN Z, XU Z, CHEN C, FENG T, LI W, GUO H, SHAN S