基于具有两亲性的细菌纤维素的柔性导电聚吡咯纳米复合膜。
Flexible conductive polypyrrole nanocomposite membranes based on bacterial cellulose with amphiphobicity.
机构信息
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of High Performance fibers and products (Ministry of Education), College of Materials Science and Engineering, Donghua University, Shanghai, 201620, PR China.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of High Performance fibers and products (Ministry of Education), College of Materials Science and Engineering, Donghua University, Shanghai, 201620, PR China.
出版信息
Carbohydr Polym. 2015 Mar 6;117:230-235. doi: 10.1016/j.carbpol.2014.09.049. Epub 2014 Sep 28.
Flexible conductive polypyrrole nanocomposite membranes based on bacterial cellulose (BC) with amphiphobicity have been successfully prepared through in situ chemical synthesis and then infiltrated with polysiloxane solution. The results suggested that polypyrrole (PPy) nanoparticles deposited on the surface of BC formed a continuous core-shell structure by taking along the BC template. After modification with polysiloxane, the surface characteristics of the conductive BC membranes changed from highly hydrophilic to hydrophobic. The AFM images revealed that the roughness of samples after polysiloxane treatment increased along with the increase of pyrrole concentration. The contact angles (CAs) data revealed that the highest water contact angle and highest oil contact angle are 160.3° and 136.7°, respectively. The conductivity of the amphiphobic membranes with excellent flexibility reached 0.32 S/cm and demonstrated a good electromagnetic shielding effectiveness with an SE of 15 dB which could be applied in electromagnetic shielding materials with self-cleaning properties. It opened a new field of potential applications of BC materials.
基于具有两亲性的细菌纤维素（BC）的柔性导电聚吡咯纳米复合膜已通过原位化学合成成功制备，然后用聚硅氧烷溶液渗透。结果表明，聚吡咯（PPy）纳米颗粒在 BC 模板的作用下沉积在 BC 表面上形成了连续的核壳结构。经过聚硅氧烷改性后，导电 BC 膜的表面特性从高亲水变为疏水。AFM 图像显示，经过聚硅氧烷处理后，样品的粗糙度随吡咯浓度的增加而增加。接触角（CA）数据表明，最高水接触角和最高油接触角分别为 160.3°和 136.7°。具有优异柔韧性的两亲性膜的电导率达到 0.32 S/cm，并表现出良好的电磁屏蔽效果，屏蔽效能（SE）为 15 dB，可应用于具有自清洁性能的电磁屏蔽材料。这为 BC 材料的潜在应用开辟了新的领域。
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