The
simultaneously oleophobic/hydrophilic membranes are highly
desirable in oil–water separation since both gravity and wettability
promote the separation, which renders the separation process energy-efficient.
Although simultaneously oleophobic/hydrophilic coatings have been
reported before, the fabrication process is complicated and often
involves chemical synthesis and multiple steps. Moreover, the tribological
performance, which is critical to long-term application, has been
rarely investigated. In the current paper, we report a nanometer-thick
simultaneously oleophobic/hydrophilic polymer coating for oil–water
separation. The coating is fabricated using a commerically available
perfluoropolyether (PFPE) via a single-step dip-coating process. The
tribology testing results suggest that the PFPE coating is mechanically
robust. The contact angle and oil–water separation tests indicate
that such coating is efficient in oil–water separation. The
finding here has important implications in real-life application of
simultaneouly oleophobic/hydrophilic coatings in oil–water
separation.
Small bowel diverticular disease is usually asymptomatic, but complicated small bowel diverticular disease can present as an acute abdomen, manifesting as diverticulitis, perforation, abscess, obstruction or bleeding. Due to the rarity of the disease, very few studies have been conducted on complicated small bowel diverticular disease. Therefore, there are no clear guidelines on management. General peritonitis remains the best indication for surgical management due to its correlation with high mortality and prolonged hospital stay. Traditionally, perforated small bowel diverticular disease is managed with exploratory laparotomy, primary bowel resection and anastomosis regardless of acute presentation. However, more recent studies demonstrated a trend towards conservative or less invasive surgical management. Here, we report two perforated small bowel diverticulitis cases at our institution that underwent different management and had different outcomes.
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