Liu Lin, Ping Enming, Sun Junmei, Zhang Lijuan, Zhou Yunshan, Zhong Yuxu, Zhou Yuanyuan, Wang Yong'an
State Key Laboratory of Chemical Resource Engineering, Institute of Science, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
Dalton Trans. 2019 May 21;48(20):6951-6959. doi: 10.1039/c9dt00503j.
Attachment of MOF-5 particles on the surface of carboxymethylated non-woven chitosan cloth (denoted MOF-5@chitosan) was achieved by a layer-by-layer technique in an alternating bath of Zn(OAc)2·2H2O and terephthalic acid solutions. Afterwards, silver nanoparticles were formed/loaded within the resulting MOF-5@chitosan by irradiating at 350 nm wavelength the composite immersed in an aqueous solution of silver nitrate of different concentrations, leading to the formation of ternary composites (denoted Ag@MOF-5@chitosan) which were thoroughly characterized by various techniques. Decontamination of HD over the composites was systematically studied and the results showed that decontamination efficacy increased with the increase of silver amount. The decontamination rate constant and half-life of HD were found to be 0.011 min-1 and 63.0 min over the optimal composite, respectively. Remarkably, attachment of the silver nanoparticles and MOF-5 on the chitosan cloth surface did not interfere with chitosan's original hemostatic capability that was confirmed through the arterial hemostasis of rats. It is expected that the multifunctional composite material can find practical applications in the fields of hemostasis, sterilization and chemical war agent decontamination.
通过在Zn(OAc)₂·2H₂O和对苯二甲酸溶液的交替浴中采用层层技术，将MOF-5颗粒附着在羧甲基化非织造壳聚糖布（表示为MOF-5@壳聚糖）表面。之后，通过在350 nm波长下照射浸入不同浓度硝酸银水溶液中的复合材料，在所得的MOF-5@壳聚糖中形成/负载银纳米颗粒，从而形成三元复合材料（表示为Ag@MOF-5@壳聚糖），并用各种技术对其进行了全面表征。系统研究了复合材料对HD的去污性能，结果表明去污效率随银含量的增加而提高。在最佳复合材料上，HD的去污速率常数和半衰期分别为0.011 min⁻¹和63.0 min。值得注意的是，银纳米颗粒和MOF-5附着在壳聚糖布表面并不干扰壳聚糖原有的止血能力，这一点通过大鼠动脉止血得到了证实。预计这种多功能复合材料可在止血、杀菌和化学战剂去污领域找到实际应用。
