Abstract:
A superhydrophobic coated was fabricated via a simple spray coating technique to increase surface roughness with zeolitic imidazole framework (ZIF) and decreased surface free energy with trimethoxy (3,3,3-trifluoropropyl silane) (FAS-3). ZIF particles were synthesized in aqueous solution and composited with nanocellulose (NC) to improve particle distribution. Additionally, both of ZIF and ZIF/NC were modified with FAS-3 to obtain a superhydrophobic solution. The composite solution was constructed superhydrophobic surface by using spray coating technique. The hierarchically micro structured of FAS-3/ZIF and FAS-3/ZIF/NC coated layer was constructed which exhibited high surface roughness (roughness value 5.06 and 5.48 µm, respectively) compared with uncoated paper (roughness value 3.7 µm) and lower surface free energy (total surface free energy 0.06 and 1.03 mN/m, respectively) than uncoated paper (total surface free energy 61.57 mN/m) owing to low surface energy FAS-3. Moreover, the FAS-3/ZIF and FAS-3/ZIF/NC coated on cellulose paper showed superhydrophobic properties with a water contact angle of 175.5° and 161.1°, respectively. The coated cellulose paper possessed excellent performance in oil/water mixture separation with separation efficiency up to 94 % through the gravity driven
Thammasat University. Thammasat University Library