Nano-TiO_2改性PE-LD复合抗菌薄膜制备与性能研究
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摘要
将纳米二氧化钛(Nano-TiO_2)经过改性处理之后,按照不同的比例添加至低密度聚乙烯(PE-LD)树脂中混合造粒、流延制备改性薄膜,并以聚对苯二甲酸乙二醇酯(PET)薄膜为外层薄膜进行复合,最终得到高阻隔性改性抑菌薄膜。对薄膜的力学、抗菌及光学性能进行测试。结果表明,随着Nano-TiO_2添加比例的递增,薄膜的力学性能和抗菌性能增强,而光学性能下降;其中,当Nano-TiO_2以2.5%的比例添加至树脂中制备得到薄膜的抗张强度和雾度较大,而伸长率和透光率较小,但其阻气性、阻水性及抗菌效果较好,可以应用于食品的抗菌包装。
A type of antibacterial films was prepared by a casting method using TiO_2 nanoparticles(Nano-TiO_2) as an antibacterial agents and low-density polyethylene(PE-LD) resin as a matrix, followed by hot compression with polyethylene terephthalate(PET) film as an outer layer. The mechanical, antibacterial and optical properties of the composite films were evaluated. The results indicated that, as the proportion of increases, the mechanical and antibacterial properties of the films were enhanced with increasing the loading of Nano-TiO_2, whereas the optical properties tended to decrease. When 2.5 wt % of Nano-TiO_2 was added, the tensile and haze strength of the films was higher than the pristine one. However, their light transmittance became smaller, but their gas resistance, water resistance and antibacterial effect became better. The composite films developed by this work can be used for the antimicrobial packaging of food.
A type of antibacterial films was prepared by a casting method using TiO_2 nanoparticles(Nano-TiO_2) as an antibacterial agents and low-density polyethylene(PE-LD) resin as a matrix, followed by hot compression with polyethylene terephthalate(PET) film as an outer layer. The mechanical, antibacterial and optical properties of the composite films were evaluated. The results indicated that, as the proportion of increases, the mechanical and antibacterial properties of the films were enhanced with increasing the loading of Nano-TiO_2, whereas the optical properties tended to decrease. When 2.5 wt % of Nano-TiO_2 was added, the tensile and haze strength of the films was higher than the pristine one. However, their light transmittance became smaller, but their gas resistance, water resistance and antibacterial effect became better. The composite films developed by this work can be used for the antimicrobial packaging of food.
引文
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[9] 中华人民共和国国家标准.GB/T 1038—2000.塑料薄膜和薄片气体透过性试验方法/压差法[S].北京:中国标准出版社,2017.
[10] 卢叶,杨福馨,张恒光,等.载银抗菌剂/PE-LD抗菌薄膜的制备与性能研究[J].包装工程,2013,34(11):27-30.LU Y,YANG F X,ZHANG H G,et al.Preparation and Study on the Properties of Silver-Carrying Antibacterial Agent/LDPE Antibacterial Film [J].Packaging Engineering,2013,34(11):27-30.
[11] ZDUNEK A,BEDNARCZYK J,Effect of Mannitol Treatment on Ultrasound Emission During Texture Profile Analysis of Potato and Apple Tissue [J].Journal Studies,2006,37(3):332-359.
[2] 罗自生,叶轻飏,李栋栋,等.纳米二氧化钛改性PE-LD薄膜包装对草莓品质的影响[J].现代食品科技,2013,29(10):2 340-2 344.LUO Z S,YE Q Y,Li D D,et al.Nanometer Titanium Dioxide Modified LDPE Film Packaging Affect Qualitative [J].Modern Food Science and Technology,2013,29(10):2 340-2 344.
[3] 刘达玉,刘海强,李翔,等,杏鲍菇冷链综合保鲜技术应用[J].保鲜与加工,2017,17(1):122-125.LIU D Y,LIU H Q,LI X,et al.Application of Cold Chain Comprehensive Preservation Technology of Apricot Mushroom [J].Preservation and Processing,2017,17(1):122-125.
[4] SUNADAK,WATANABET H,HIMOTOK A.Bactericidal Activity of Copper-deposited TiO2 Thin Filmunder Weak UV Light Illumination[J].Environmental Scienceand Technology,2003,37(20):4 785-4 789.
[5] YANG Q,KAPOORMP,INAGAKIS.Sulfuric Acid functionalized Mesoporous Benzene-silica with a Molecularscale Periodicity in the Walls[J].Journal of the American Chemical Society,2002,124(33):9 694-9 695.
[6] ZOU J,GAOJ C,WANG Y.Trial Studyon Nanosize TiO2 Coated by Dense SiO2 Film [J].Journal of Materials Science & Engineering,2004,22(1):71-73.
[7] 户帅锋,杨福馨,张勇,等,山梨酸钾-PE-LD抗菌薄膜的制备与性能[J].包装工程,37(5):15-19.HU S F,YANG F X,ZHANG Y,et al.Preparation and Properties of Potassium Sorbate-LDPE Antibacterial Film [J].Packaging Engineering,37(5):15-19.
[8] 张炯炯,杨福馨,范飞,等,聚乙烯改性防霉包装薄膜的制备与性能研究[J].塑料工业,2017,45(10):108-112.ZHANG J J,YANG F X,FAN F,et al.Preparation and Study on Properties of Polyethylene Modified Anti-mildew Packaging Film [J].Plastics Industry,2017,45(10):108-112.
[9] 中华人民共和国国家标准.GB/T 1038—2000.塑料薄膜和薄片气体透过性试验方法/压差法[S].北京:中国标准出版社,2017.
[10] 卢叶,杨福馨,张恒光,等.载银抗菌剂/PE-LD抗菌薄膜的制备与性能研究[J].包装工程,2013,34(11):27-30.LU Y,YANG F X,ZHANG H G,et al.Preparation and Study on the Properties of Silver-Carrying Antibacterial Agent/LDPE Antibacterial Film [J].Packaging Engineering,2013,34(11):27-30.
[11] ZDUNEK A,BEDNARCZYK J,Effect of Mannitol Treatment on Ultrasound Emission During Texture Profile Analysis of Potato and Apple Tissue [J].Journal Studies,2006,37(3):332-359.