国家/地区 中国（4）
IPC部 C（4）
IPC大类 C08（4）
IPC小类 C08B（4）
IPC C09D005/08（2） C09D007/61（2）
发明人 WANG Y（2）
公开年 2021（2）
申请年 2020（4）
专利权人

Fluid loss additive used e.g. for drilling fluid and oil extraction field, comprises modified natural high molecular polymer e.g. starch, xanthan gum or vegetable gum, and nanoparticle e.g. nano-silicon dioxide and nano-calcium carbonate.

YANG X, QIAN X, JIANG B, WANG L, WANG Y, LIN Y

Preparing carboxylated graphene/chitosan composite coating agent comprises mixing carboxylated graphene powder with water and adding carboxylated graphene solution to chitosan solution and reacting.

YAO Q, LIANG Y, WANG X, WEN H, ZHOU H, DAN W

Preparing modified beta-cyclodextrin-graphene oxide composite material by weighing beta-cyclodextrin and adding dimethylformamide, adding acetone to precipitate, filtering with suction, and ultrasonically dispersing, and vacuum-drying.

LIU Z, CHEN Z, WEI R, GUO Y

Preparing cationized cellulose/graphene/polypyrrole conductive composite material used as active material, by oxidizing graphene oxide with reducing agent, modifying bacterial cellulose, mixing dispersion with pyrrole monomer and reacting.

WANG H, WANG Y, FEI G, WANG M, SUN L, MA Y