Conductive metal–organic frameworks (c-MOFs) show great potential in electrochemical energy storage thanks to their high electrical conductivity and highly accessible surface areas. However, there are significant challenges in processing c-MOFs for practical applications. Here, we report on the fabrication of c-MOF nanolayers on cellulose nanofibers (CNFs) with formation of nanofibrillar CNF@c-MOF by interfacial synthesis, in which CNFs serve as substrates for growth of c-MOF nanolayers. The obtained hybrid nanofibers of CNF@c-MOF can be easily assembled into freestanding nanopapers, demonstrating high electrical conductivity of up to 100 S cm–1, hierarchical micromesoporosity, and excellent mechanical properties. Given these advantages, the nanopapers are tested as electrodes in a flexible and foldable supercapacitor. The high conductivity and hierarchical porous structure of the electrodes endow fast charge transfer and efficient electrolyte transport, respectively. Furthermore, the assembled supercapacitor shows extremely high cycle stability with capacitance retentions of >99% after 10000 continuous charge–discharge cycles. This work provides a pathway to develop flexible energy storage devices based on sustainable cellulose and MOFs.

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A series of microporous organic polymers (MOPs) were synthesized by Schiff base condensation of 1,3,5tris(4-aminophenyl)benzene and a number of dialdehyde monomers. The polymers were structurally characterized by in situ infrared and ex situ solid state 13 C{ 1 H} nuclear magnetic resonance (NMR) spectroscopy. Synthesis conditions were optimized to enhance CO 2 uptake by the MOPs. Synthesis at low temperatures results in the MOPs being linked by imine groups. Heating of the MOPs reduces the number of imine groups and after heating to >300 C nitrile groups were found to be present in the MOPs. The MOPs have specific surface areas up to 614 m 2 g À1 and narrow pore size distributions of $4 to 8 Å. The selectivity of CO 2 -over-N 2 at 273 K and 1 bar was 56-77, which requires either an influence of chemisorption on CO 2 or a molecular sieving (or kinetic selection) of CO 2 -over-N 2 . The materials had also heats of adsorption typical for physisorption of CO 2 .

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The new technology of “solar-driven ionic power generation” based on ionic thermophoresis and electrokinetic effects could convert solar energy into electricity by using a film of nanocellulose @ conductive metal–organic framework.

Background Patient-controlled epidural analgesia (PCEA) has not been widely used after gastrectomy, although, in other abdominal surgery, it benefits patients more than patient-controlled intravenous analgesia (PCIA). We attempted to determine the effect of PCEA compared with PCIA on postoperative pain control and recovery after gastrectomy for gastric cancer. Methods A randomized controlled clinical trial that included patients undergoing D2 radical gastrectomy for gastric cancer was conducted for this study. Patients were randomized to a morphine-bupivacaine PCEA group and a morphine PCIA group. Postoperative outcomes such as pain, fasting blood glucose (FBG), time to first passage of flatus, complications, and time staying in hospital after surgery were compared with an intention-to-treat analysis. Results Between March 2010 and October 2010, 67 patients were randomized and 60 were evaluated. The PCEA group showed lower pain scores both at rest and on coughing after the operation (P \ 0.05). FBG after the operation was significantly lower in the PCEA group than that in the PCIA group (P \ 0.05). Time to first passage of flatus after surgery was shorter in the PCEA group (P \ 0.05), while there were no significant differences regarding the incidence of complications between the two groups in terms of the clinical records. The length of hospital stay in the PCEA group was 10.7 ± 1.7 days, which was significantly shorter than that in the PCIA group (11.9 ± 1.8 days, P \ 0.05). Conclusions After gastrectomy for gastric cancer, PCEA, compared with PCIA, offered safer pain relief with superior pain control and resulted in a lower stress response and a quicker return of bowel activity.

5Amine-modified sorbents are relevant to the capturing of dilute carbon dioxide from gas mixtures, and micro-/mesoporous polymers are promising substrates due to their rich chemistry. Here, we prepared an aldehyde-rich polyimine with micro-and mesopores with a Schiff-base condensation of 1,3,5-tris(4aminophenyl)benzene and 1,3,5-benzenetricarboxaldehyde using an excess of aldehydes. The micropores were crucial to the physisorption of CO 2 , while the mesopores provided space for the post-modification 10 with tris(2-aminoethyl)amine (tren) that induced the chemisorption of CO 2 . The amine modified polymer showed a high uptake of CO 2 at low pressures (1.13 mmol/g at 0.05 bar and 273 K) and a high estimated CO 2 -over-N 2 selectivity (1.04×10 3 at 273 K for 5v%/95v% CO 2 /N 2 mixture). CO 2 both physisorbed and chemisorbed on the amine-modified polyimine, which we confirmed by studying the CO 2 -amine chemistry using in situ FTIR spectroscopy and solid state 13 C NMR spectroscopy. Carbamic acid formed 15 during the chemisorption of CO 2 , as the CO 2 reacted with the amine groups. Due to the formation of carbamic acid, the isosetric heat of adsorption was high, with values up to 80 kJ/mol at a low coverage of CO 2 . It appears that amine-modified porous polymers could be relevant to the removal of CO 2 from gas streams with low concentrations.

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