Fig. 6
From: Preparation and application of melamine cross-linked poly ammonium as shale inhibitor

SEM pictures of bentonite treated with different methods. a Virgin bentonite, b bentonite treated with water, c bentonite treated with DEM-8
From: Preparation and application of melamine cross-linked poly ammonium as shale inhibitor
SEM pictures of bentonite treated with different methods. a Virgin bentonite, b bentonite treated with water, c bentonite treated with DEM-8