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Multifunctional Cellulose Nanopaper with Superior Water-Resistant, Conductive, and Antibacterial Properties Functionalized with Chitosan and Polypyrrole
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-06-29 , DOI: 10.1021/acsami.1c06647 Haishun Du 1 , Mahesh Parit 1 , Kun Liu 2 , Miaomiao Zhang 1 , Zhihua Jiang 1 , Tung-Shi Huang 3 , Xinyu Zhang 1 , Chuanling Si 2
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-06-29 , DOI: 10.1021/acsami.1c06647 Haishun Du 1 , Mahesh Parit 1 , Kun Liu 2 , Miaomiao Zhang 1 , Zhihua Jiang 1 , Tung-Shi Huang 3 , Xinyu Zhang 1 , Chuanling Si 2
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Cellulose nanopaper (CNP) has been considered as a promising material with great application potential in diverse fields. However, the hydrophilic nature of CNP significantly limits its practical application. In order to improve its water resistance, we demonstrate a facile approach to functionalize CNP by impregnating it with chitosan (CS), followed by in situ polymerization of polypyrrole (PPy). The results indicate that the obtained CNP/CS/PPy shows excellent water resistance with the wet tensile strength of up to 80 MPa, which is more than 10 times higher than that of the pure CNP. Intriguingly, new features (e.g., electrical conductivity, antibacterial activity, and so forth) are achieved at the same time. The functionalized CNP/CS/PPy shows a high conductivity of 6.5 S cm–1, which can be used for electromagnetic interference shielding applications with a high shielding performance of around 18 dB. In addition, the CNP/CS/PPy exhibits good antibacterial activity toward Staphylococcus aureus and Escherichia coli, with the bacterial reductions of 99.28 and 95.59%, respectively. Thus, this work provides a simple and versatile approach to functionalize CNP for achieving multifunctional properties.
中文翻译：
具有优异防水、导电和抗菌性能的多功能纤维素纳米纸，经壳聚糖和聚吡咯功能化
纤维素纳米纸（CNP）被认为是一种很有前途的材料，在各个领域具有巨大的应用潜力。然而，CNP 的亲水性极大地限制了其实际应用。为了提高其耐水性，我们展示了一种通过用壳聚糖 (CS) 浸渍 CNP，然后原位聚合聚吡咯 (PPy)来功能化 CNP 的简便方法。结果表明，所得CNP/CS/PPy表现出优异的耐水性，湿拉伸强度高达80 MPa，是纯CNP的10倍以上。有趣的是，同时实现了新特征（例如，导电性、抗菌活性等）。功能化的 CNP/CS/PPy 显示出 6.5 S cm 的高电导率–1，可用于电磁干扰屏蔽应用，具有18dB左右的高屏蔽性能。此外，CNP/CS/PPy 对金黄色葡萄球菌和大肠杆菌表现出良好的抗菌活性，细菌减少率分别为 99.28% 和 95.59%。因此，这项工作提供了一种简单而通用的方法来使 CNP 功能化以实现多功能特性。
更新日期：2021-07-14
中文翻译：
具有优异防水、导电和抗菌性能的多功能纤维素纳米纸，经壳聚糖和聚吡咯功能化
纤维素纳米纸（CNP）被认为是一种很有前途的材料，在各个领域具有巨大的应用潜力。然而，CNP 的亲水性极大地限制了其实际应用。为了提高其耐水性，我们展示了一种通过用壳聚糖 (CS) 浸渍 CNP，然后原位聚合聚吡咯 (PPy)来功能化 CNP 的简便方法。结果表明，所得CNP/CS/PPy表现出优异的耐水性，湿拉伸强度高达80 MPa，是纯CNP的10倍以上。有趣的是，同时实现了新特征（例如，导电性、抗菌活性等）。功能化的 CNP/CS/PPy 显示出 6.5 S cm 的高电导率–1，可用于电磁干扰屏蔽应用，具有18dB左右的高屏蔽性能。此外，CNP/CS/PPy 对金黄色葡萄球菌和大肠杆菌表现出良好的抗菌活性，细菌减少率分别为 99.28% 和 95.59%。因此，这项工作提供了一种简单而通用的方法来使 CNP 功能化以实现多功能特性。
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