Investigation of gelatin/multi-walled carbon nanotube nanocomposite films as packaging materials.
Investigation of gelatin/multi-walled carbon nanotube nanocomposite films as packaging materials.
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DOI：
10.1002/fsn3.81
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发表时间：
2014-01
影响因子：
3.9
通讯作者：
Niakosari, Mehrdad
中科院分区：
文献类型：
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作者：
Kavoosi, Gholamreza;Dadfar, Seyed Mohammad Mahdi;Dadfar, Seyed Mohammad Ali;Ahmadi, Farhad;Niakosari, Mehrdad
以含有多壁碳纳米管(MWCNT、0.5、1、1.5和2%w/w明胶)为填料的明胶溶液(10%w/v)制备了明胶复合膜。测试了薄膜的溶解性、吸水性、吸水率、透湿性、力学性能和抗菌性能。明胶膜的溶解度为45 ± 1%，吸水率为821 ± 42%，吸水率为45 ± 1.1%，吸水率为0.4 ± 0.022 g mm/m2 kpa h。MWCNT的加入使其水溶性、溶胀性、吸水率和WVP显著降低。含1~1.5%MWCNT的明胶/MWCNT膜的水蒸气透过率最低。明胶薄膜的拉伸强度为13.4 ± 1.2 Mpa，断裂伸长率为95 ± 5%，弹性模量为45.4 ± 7 Mpa。MWCNT的加入显著提高了复合材料的拉伸强度，降低了断裂伸长率。当MWCNT含量为1.5%时，复合材料的机械强度最大。所有明胶/多壁碳纳米管薄膜对革兰氏阳性菌和革兰氏阴性菌均显示出显著的抗菌活性。我们的结果表明，明胶/多壁碳纳米管复合膜可以作为一种非常有吸引力的传统材料的替代品，用于不同的生物医学和食品应用。
Gelatin composite films were prepared from gelatin solutions (10% w/v) containing multi-walled carbon nanotubes (MWCNT, 0.5, 1, 1.5, and 2% w/w gelatin) as nanofiller. The water solubility, water swelling, water uptake, water vapor permeability (WVP), mechanical, and antibacterial properties of the films were examined. Water solubility, water swelling, water uptake, and WVP for gelatin films were 45 ± 1%, 821 ± 42%, 45 ± 1.1%, and 0.4 ± 0.022 g mm/m2 kPa h, respectively. Incorporation of MWCNT caused a significant decrease in water solubility, water swelling, water uptake, and WVP. Gelatin/MWCNT films containing 1–1.5% MWCNT showed the lowest water vapor transmission. Tensile strength, elongation at break, and Young's modulus for gelatin films were 13.4 ± 1.2 MPa, 95 ± 5%, and 45.4 ± 7 MPa, respectively. Incorporation of MWCNT caused a significant increase in tensile strength and decrease in the elongation at break. The largest mechanical strength was found at 1.5% MWCNT. All gelatin/MWCNT films showed significant antibacterial activities against both gram-positive and gram-negative bacteria. Our results suggest that the gelatin/MWCNT composites films could be used as a very attractive alternative to traditional materials for different biomedical and food applications.