基于纳米银负载氧化石墨烯的新型聚乙烯复合材料
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摘要
通过超声波辅助液相法将纳米银(Ag NPs)与氧化石墨烯(GO)结合制得了一种新的负载纳米银的氧化石墨烯材料Ag NPs@GO。分析表明在该材料中Ag NPs主要被锚接在GO片层的含氧基团和缺陷上,部分Ag单质被氧化为Ag~+离子并有部分GO被还原。Ag NPs@GO能有效抑制铜绿假单胞菌生长,其抑菌能力显著强于Ag NPs和GO。将Ag NPs@GO作为添加剂引入聚乙烯(PE)基体,进一步制备了新型的AgNPs@GO掺杂PE复合材料0.48wt%-AgNPs@GO/PE,相比PE和AgNPs掺杂PE复合材料,0.48wt%-AgNPs@GO/PE具有更好的抑菌能力和更强的阻隔水蒸气性能,并且在水和乙醇溶液中都具有较好的耐溶出性能。
A new nano silver particels loaded graphene oxide(AgNPs@GO)was obtained through ultrasonic assisted liquid phase method.In AgNPs@GO,nano silver particels(AgNPs)are mainly anchored at oxygen containing groups and defects of graphene oxide(GO)sheets,part of GO sheets are reduced and some Ag(0)atoms have been oxidized to Ag~+ions.AgNPs@GO exhibits significantly stronger ability for inhibiting Pseudomonas aeruginosa than that of Ag NPs and GO.Therefore,AgNPs@GO was further introduced to polyethylene(PE)matrix as an additive to prepare a new composite material 0.48wt%-AgNPs@GO/PE.Compare with bare PE and Ag NPs doped PE composites,0.48wt%-AgNPs@GO/PE not only has a better antibacterial ability and stronger water vapor barrier property,but also dissolves out less nonvolatile substance than PE in water and ethanol solution.
A new nano silver particels loaded graphene oxide(AgNPs@GO)was obtained through ultrasonic assisted liquid phase method.In AgNPs@GO,nano silver particels(AgNPs)are mainly anchored at oxygen containing groups and defects of graphene oxide(GO)sheets,part of GO sheets are reduced and some Ag(0)atoms have been oxidized to Ag~+ions.AgNPs@GO exhibits significantly stronger ability for inhibiting Pseudomonas aeruginosa than that of Ag NPs and GO.Therefore,AgNPs@GO was further introduced to polyethylene(PE)matrix as an additive to prepare a new composite material 0.48wt%-AgNPs@GO/PE.Compare with bare PE and Ag NPs doped PE composites,0.48wt%-AgNPs@GO/PE not only has a better antibacterial ability and stronger water vapor barrier property,but also dissolves out less nonvolatile substance than PE in water and ethanol solution.
引文
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[2]LIM M,KIM D,SEO J.Enhanced oxygen-barrier and waterresistance properties of poly(vinyl alcohol)blended with poly(acrylic acid)for packaging applications.Polym.Int.,2016,65(4):400-406.
[3]JJOKAR M,RAHMAN R A,IBRAHIM N A,et al.Melt production and antimicrobial efficiency of low-density polyethylene(LDPE)-silver nanocomposite film.Food Bioprocess Tech.,2012,5(2):719-728.
[4]DAGLIA M.Polyphenols as antimicrobial agents.Curr.Opin.Biotechnol.,2012,23(2):174-181.
[5]KIM J S,KUK E,YU K N,et al.Antimicrobial effects of silver nanoparticles.Nanomed-Nanotechnol.,2007,3(1):95-101.
[6]SANCHEZ-VALDES S.Sonochemical deposition of silver nanoparticles on linear low density polyethylene/cyclo olefin copolymer blend films.Polym.Bull.,2014,71(7):1611-1624.
[7]LUO CHEN,DONG ZHENG,LI ZHEN-XING,et al.The effect of nano-silver antibacterial package on the quality of shrimp meat during cold storage.Packging Engineering,2018,39(7):60-64.
[8]HE Y,QIAN L,LIU X,et al.Graphene oxide as an antimicrobial agent can extend the vase life of cut flowers.Nano Res.,2018:1-13.
[9]GEORGAKILAS V,TIWARI J N,KEMP K C,et al.Noncovalent functionalization of graphene and graphene oxide for energy materials,biosensing,catalytic,and biomedical applications.Chem.Rev.,2016,116(9):5464-5519.
[10]PHAM T A,KUMAR N A,JEONG Y T.Covalent functionalization of graphene oxide with polyglycerol and their use as templates for anchoring magnetic nanoparticles.Synthetic Met.,2010,160(17/18):2028-2036.
[11]DU W,LüY,LU H,et al.Surface modification by graphene oxide:an efficient strategy to improve the performance of activated carbon based supercapacitors.Chinese Chem.Lett.,2017,28(12):2285-2289.
[12]JI H,SUN H,QU X.Antibacterial applications of graphene-based nanomaterials:recent achievements and challenges.Adv.Drug Deliver.Rev.,2016,105:176-189.
[13]THAVANATHAN J,HUANG N M,THONG K L.Colorimetric detection of DNA hybridization based on a dual platform of gold nanoparticles and graphene oxide.Biosens.Bioelectron.,2014,55(10):91-98.
[14]RODRIGUEZ-GONZáLEZ C,VELAZQUEZ-VILLALBA P,SALAS P,et al.Green synthesis of nanosilver-decorated graphene oxide sheets.Iet Nanobiotechnol.,2016,10(5):301-307.
[15]DU W,LüY,CAI Z,et al.Flexible all-solid-state supercapacitor based on three-dimensional porous graphene/titanium-containing copolymer composite film.Acta Phy.-Chim.Sin.,2017,33(9):1828-1837.
[16]姜兴茂,闵建中,黎珊.制备单分散超细颗粒的方法:中国,CN104690295A.2013.12.05.
[17]LU C,MAI Y W.Preparation,characterization and antibacterial properties of silver-modified graphene oxide.J.Mater.Chem.,2011,21(10):3350-3352.
[18]MOULDER J F,STICKLE W F,SOBOL P E,et al.Handbook of X-ray Photoelectron Spectroscopy.Japan:ULVAC-PHI,Inc,1992:12-86.
[19]TANG J,CHEN Q,XU L,et al.Graphene oxide-silver nanocomposite as a highly effective antibacterial agent with species-specific mechanisms.ACS Appl.Mater.Interfaces,2013,5(9):3867-3874.
[20]DAS M R,SARMA R K,SAIKIA R,et al.Synthesis of silver nanoparticles in an aqueous suspension of graphene oxide sheets and its antimicrobial activity.Colloid.Surface.B,2011,83(1):16-22.
[21]MESARO N,NORDMANN P,PLESIAT P,et al.Pseudomonas aeruginosa:resistance and therapeutic options at the turn of the new millennium.Clin.Microbiol.Infect.,2007,13(6):560-578.
[22]POLLACK M,YOUNG L.Protective activity of antibodies to exotoxin A and lipopolysaccharide at the onset of Pseudomonas aeruginosa septicemia in man,J.Clin.Invest.,1979,63(2):276-286.
[23]SONG H,KO K,OH I,et al.Fabrication of silver nanoparticles and their antimicrobial mechanisms.Eur.Cells.Mater.,2006,11:58.
[24]FENG Q L,WU J,CHEN G Q,et al.A mechanistic study of the antibacterial effect of silver ions on Escherichia coli and Staphylococcus aureus.J.Biomed.Mater.Res.,2000,52(4):662-668.
[25]SONDI I,SALOPEK-SONDI B.Silver nanoparticles as antimicrobial agent:a case study on E.coli as a model for Gram-negative bacteria.Colloid Interface Sci.,2004,275(1):177-182.
[26]LIU Z,STOUT J E,BOLDIN M,et al.Intermittent use of coppersilver ionization for Legionella control in water distribution systems:a potential option in buildings housing individuals at low risk of infection.Clin.Infect.Dis.,1998,26(1):138-140.
[27]PARK H J,KIM J Y,KIM J,et al.Silver-ion-mediated reactive oxygen species generation affecting bactericidal activity.Water Res.,2009,43(4):1027-1032.
[28]ZHENG H,MA R,GAO M,et al.Antibacterial applications of graphene oxides:structure-activity relationships,molecular initiating events and biosafety.Sci.Bull.,2018,63(2):133-142.
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