State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Wallenberg Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm, Sweden.
ACS Appl Mater Interfaces. 2020 Dec 9;12(49):55527-55535. doi: 10.1021/acsami.0c19099. Epub 2020 Nov 25.
Inspired by a wood-like multicomponent structure, an interface-reinforced method was developed to fabricate high-performance cellulose nanofibril (CNF)/carbon nanotube (CNT) nanocomposites. Holocellulose nanofibrils (HCNFs) with core-shell structure were first obtained from bagasse via mild delignification and mechanical defibration process. The well-preserved native hemicellulose as the amphiphilic shell of HCNFs could act as a binding agent, sizing agent, and even dispersing agent between HCNFs and CNTs. Remarkably, both the tensile strength at high relative humidity (83% RH) and electrical conductivity of the HCNF/CNT nanocomposites were significantly improved up to 121 MPa and 321 S/m, respectively, demonstrating great superiority compared to normal CNF/CNT composite films. Furthermore, these HCNF/CNT composites with outstanding integrated performances exhibited great potential in the field of flexible liquid sensing.
受木材多组分结构的启发，开发了一种界面增强方法来制备高性能纤维素纳米纤维（CNF）/碳纳米管（CNT）纳米复合材料。首先通过温和的脱木质素和机械纤维化过程从甘蔗渣中获得具有核壳结构的全纤维素纳米纤维（HCNF）。HCNF 中原位保留的半纤维素作为其亲水性壳层，可作为 HCNF 和 CNT 之间的结合剂、上浆剂甚至分散剂。值得注意的是，HCNF/CNT 纳米复合材料在高相对湿度（83% RH）下的拉伸强度和电导率分别显著提高至 121 MPa 和 321 S/m，与普通 CNF/CNT 复合薄膜相比具有很大的优势。此外，这些具有出色综合性能的 HCNF/CNT 复合材料在柔性液体传感领域具有巨大的应用潜力。
