Fe3O4 nanoparticles were used as stabilizer and emulsifier to prepare Pickering-type ASA (alkenyl succinic anhydride) emulsions

and the effects of particles concentration

volume ratio of oil/water and pH value on the type

stability

morphology and sizing performance of the emulsions were investigated. Fe3O4 nanoparticles were able to emulsify ASA to prepare homogeneous emulsions. When emulsions were placed without stirring at room temperature

the separated oil phase fraction increased with increasing particles concentration and decreased with increasing volume ratio of oil/water. Emulsions could keep homogeneous phase for 6 h as volume ratio of oil/water was 2 and particles concentration was 0.1%(mass). For stable emulsions

part of particles was absorbed at liquid-liquid interface and part of particles entered the dispersed phase

the stability of emulsions reduced with increasing particles concentration. Before the emulsions creamed

hydrolysis resistance was investigated and ASA was partially hydrolyzed. Sheet surface contact angle gradually increased by adding emulsions which were placed for 1 h

meanwhile surface roughness were decreased. When addition of ASA was 1.0%(mass relative to the absolute dry pulp)

sheet surface contact angle reached 93.5? and surface roughness was 15.924 mm.