Graphene slurry stability directly impacts spray-coating film quality. Chemi Tech dispersants enable >50wt% high-solid slurries with >6-month storage stability through:
Polar Solvent Adaptation: Dispersants with pyrrolidone groups (e.g., KMK-155) reduce interfacial tension to <20 mN/m in NMP/DMF systems;
Low-Boiling Alternatives: Ethanol-compatible dispersants (e.g., KMK-1520) achieve 30wt% solids without toxic solvents.
Shear-Thinning Design: Long alkyl chains in dispersants decrease viscosity by >70% under spraying shear, improving atomization; static recovery prevents settling.
Thixotropy Optimization: At 0.5%-1.2% dosage, slurries exhibit thixotropic index >4.0, eliminating hard sedimentation.
Temperature Resistance: Siloxane-based dispersants suppress graphene wrinkling from -20°C to 80°C, maintaining conductive networks;
Anti-Aging Technology: Hindered phenol structures scavenge free radicals, preventing oxidative defects.
Validation: With 0.5g graphene in 5mL NMP + 1% KMK-155, slurry particle size varies <5% after 30 days, and sprayed film resistivity deviation ≤8%2.
Guangzhou Chemi Tech New Material Co., Ltd.
Address : No. 3 Road, Lanshan Village, Xiancun Town, Zengcheng District, Guangzhou City
Contact : +86-19820415595(Manager Fang)
Tel : +86-13414362583(Manager Lee)
E-mail : crystal@gzchemitech.com