载银聚乙烯醇/纳米晶纤维素/氧化石墨烯复合膜的制备及性能研究
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摘要
首先通过溶液共混浇铸成膜法制备了聚乙烯醇/纳米晶纤维素/氧化石墨烯(PVA/CNC/GO)复合膜,随后将其浸泡在AgNO3的乙醇/水混合溶液中,通过PVA还原Ag+制得了负载Ag的PVA/CNC/GO复合膜。使用扫描电子显微镜、紫外-可见分光光度计和万能材料试验机等手段对复合膜的结构与性能进行表征,结果表明:当CNC和GO质量比为1∶2时,Ag负载量达到最大值9.51%。所制备的载Ag复合膜对大肠杆菌和金黄色葡萄球菌均具有优异的抗菌活性,同时具有良好的机械强度和耐水性。
Polyvinyl alcohol/cellulose nanocrystal/graphene oxide(PVA/CNC/GO)composite films were prepared by a solution blending casting method firstly.Then,Ag loaded composite films were prepared via immersing PVA/CNC/GO films in an ethanol/water mixing solution of AgNO_3,in which Ag+was reduced to Ag by PVA.The structure and properties of films were characterized by scanning electron microscopy,UV-Vis spectrophotometer,universal material testing machine and so on.The results showed that Ag load reached the maximum value of 9.51%when the mass ratio of CNC and GO was set as 1∶2.The prepared Ag loaded PVA/CNC/GO showed excellent antibacterial activity against both Escherichia coli and Staphylococcus aureus,and they also had good mechanical strength and water resistance.
Polyvinyl alcohol/cellulose nanocrystal/graphene oxide(PVA/CNC/GO)composite films were prepared by a solution blending casting method firstly.Then,Ag loaded composite films were prepared via immersing PVA/CNC/GO films in an ethanol/water mixing solution of AgNO_3,in which Ag+was reduced to Ag by PVA.The structure and properties of films were characterized by scanning electron microscopy,UV-Vis spectrophotometer,universal material testing machine and so on.The results showed that Ag load reached the maximum value of 9.51%when the mass ratio of CNC and GO was set as 1∶2.The prepared Ag loaded PVA/CNC/GO showed excellent antibacterial activity against both Escherichia coli and Staphylococcus aureus,and they also had good mechanical strength and water resistance.
引文
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[2] Frone A N,Nicolae C A,Gabor R A,et al.Thermal properties of water-resistant starch-polyvinyl alcohol films modified with cellulose nanofibers[J].Polymer Degradation and Stability,2015,121:385-397.
[3] Pelgrift R Y,Friedman A J.Nanotechnology as a therapeutic tool to combat microbial resistance[J].Advanced Drug Delivery Reviews,2013,65(13):1803-1815.
[4] Kamoun E A,Chen X,Eldin M S M,et al.Crosslinked poly(vinyl alcohol)hydrogels for wound dressing applications:a review of remarkably blended polymers[J].Arabian Journal of Chemistry,2015,8(1):1-14.
[5] Li X,Lenhart J J.Aggregation and dissolution of silver nanoparticles in natural surface water[J].Environmental Science&Technology,2012,46(10):5378-5386.
[6] Rehan M,Barhoum A,Van Assche G,et al.Towards multifunctional cellulosic fabric:UV photo-reduction and in-situ synthesis of silver nanoparticles into cellulose fabrics[J].International Journal of Biological Macromolecules,2017,98:877-886.
[7] Li J,Liu X,Lu J,et al.Anti-bacterial properties of ultrafiltration membrane modified by graphene oxide with nano-silver particles[J].Journal of Colloid and Interface Science,2016,484:107-115.
[8]李育飞,白绘宇,王玮,等.不同形态的纳米晶纤维素的制备及其性能研究[J].纤维素科学与技术,2015,23(4):9-15.
[9] Hummers Jr W S,Offeman R E.Preparation of graphitic oxide[J].Journal of the American Chemical Society,1958,80(6):1339-1339.
[10] ToméL C,Gon9alves C M B,Boaventura M,et al.Preparation and evaluation of the barrier properties of cellophane membranes modified with fatty acids[J].Carbohydrate Polymers,2011,83(2):836-842.
[11] Liang K L,Wang Y C,Lin W L,et al.Polymer-assisted selfassembly of silver nanoparticles into interconnected morphology and enhanced surface electric conductivity[J].Rsc Advances,2014,4(29):15098-15103.
[12] Díaz-Cruz C,Nu1ez G A,Espinoza-Gómez H,et al.Effect of molecular weight of PEG or PVA as reducing-stabilizing agent in the green synthesis of silver-nanoparticles[J].European Polymer Journal,2016,83:265-277.
[13] Zhang Y,Wan Y,Shi Y,et al.Facile modification of thin-film composite nanofiltration membrane with silver nanoparticles for anti-biofouling[J].Journal of Polymer Research,2016,23(5):105.
[14] El-Miri N,El Achaby M,Fihri A,et al.Synergistic effect of cellulose nanocrystals/graphene oxide nanosheets as functional hybrid nanofiller for enhancing properties of PVA nanocomposites[J].Carbohydrate Polymers,2016,137:239-248.
[15] Archana D,Singh B K,Dutta J,et al.Chitosan-PVP-nano silver oxide wound dressing:in vitro and in vivo evaluation[J].International Journal of Biological Macromolecules,2015,73:49-57.
[16] Sukhorukova I V,Sheveyko A N,Shvindina N V,et al.Approaches for controlled Ag+ion release:influence of surface topography,roughness,and bactericide content[J].Acs Applied Materials&Interfaces,2017,9(4):4259-427.
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