Mechanical and Water Binding Properties of Carboxymethyl Cellulose/Multiwalled Carbon Nanotube Nanocomposites
Mechanical and Water Binding Properties of Carboxymethyl Cellulose/Multiwalled Carbon Nanotube Nanocomposites
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DOI：
10.1002/pc.22923
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发表时间：
2015-01-01
影响因子：
5.2
通讯作者：
Kavoosi, Gholamreza
中科院分区：
文献类型：
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作者：
Dadfar, Seyed Mohammad Mahdi;Kavoosi, Gholamreza
以多壁碳纳米管（MWCNT）为纳米填料，甘油（25%w/w CMC）为增塑剂，制备了羧甲基纤维素（CMC）复合膜。CMC膜的拉伸强度、断裂伸长率（EAB）、杨氏模量、水溶解度、水溶胀、吸水率和水蒸气渗透率（WVP）为27.5 +/-2.5MPa，11.2 +/-0.8%，198 +/-18MPa，57 +/-1.5%，738 +/-25%，124 +/-4%，和0.55 ± 0.036 g·mm/m（2）·kPa·h。通过将相对湿度从11.4%增加到85.5%，CMC膜的吸湿率（MA）从4%增加到38%。将MWCNT掺入基质中导致拉伸强度显著增加，EAB降低，杨氏模量增加，水溶性降低，水溶胀降低，吸水率降低，MA降低。CMC/MWCNT膜含有1%的MWCNT表现出最低的WVP。扫描电子显微镜显示，在CMC基质中的多壁碳纳米管的良好分散。CMC/MWCNT复合膜对革兰氏阳性菌和革兰氏阴性菌均表现出明显的抗菌活性，且抗菌活性随MWCNT含量的增加而增加。因此，良好的机械性能和耐水性沿着以及较强的抗菌活性使得接枝MWCNT的CMC膜成为合适的包装材料。Polym.比较器：36：145-152，2015. (c)2014年塑料工程师学会
Carboxymethyl cellulose (CMC) composite films were prepared from CMC solutions (2% w/v) containing multiwalled carbon nanotubes (MWCNT) as nanofiller and glycerol (25% w/w CMC) as plasticizer. Tensile strength, elongation at break (EAB), young's modulus, water solubility, water swelling, water uptake, and water vapor permeability (WVP) for CMC films were 27.5 +/- 2.5 MPa, 11.2 +/- 0.8%, 198 +/- 18 MPa, 57 +/- 1.5%, 738 +/- 25%, 124 +/- 4%, and 0.55 +/- 0.036 g.mm/m(2).kPa.h, respectively. By increasing the relative humidity from 11.4 to 85.5%, the moisture absorption (MA) of CMC films was increased from 4 to 38%. Incorporation of MWCNT into the matrix caused a significant increase in the tensile strength, decrease in EAB, increase in young's modulus, decrease in water solubility, decrease in water swelling, decrease in water uptake, and decrease in MA. CMC/MWCNT films containing 1% MWCNT showed the lowest WVP. Scanning electron microscopy showed a good dispersion of MWCNT in the CMC matrix. CMC/MWCNT films containing >1% MWCNT showed significant antibacterial activities against both Gram-positive and Gram-negative bacteria in a dose-dependent manner. Thus, good mechanical properties and water resistance along with strong antibacterial activities make CMC films grafted with MWCNT as a suitable packaging material. POLYM. COMPOS., 36:145-152, 2015. (c) 2014 Society of Plastics Engineers