Wrapping Nanocellulose Nets around Graphene Oxide Sheets

Abstract

Constructing advanced functional nanomaterials with pre-designed organized morphologies from low-dimension synthetic and biological components is challenging. Herein, we report an efficient and universal amphiphilicity-driven assembly strategy to construct "hairy" flexible hybrid nanosheets with a 1D cellulose nanofibers (CNFs) net conformally wrapped around 2D graphene oxide (GO) monolayers. This interface-driven bio-synthetic assembly is facilitated by tailoring the surface chemistry of flexible GO sheets, resulting in individual sheets tightly surrounded by dense conformal nanocellulose network. The mechanical stability of the products far exceeds the compressive instability limits of both individual components. Additionally, the CNF network significantly enhances the wetting ability of initial hydrophobic reduced GO nanosheets, allowing fast water transport combined with high filtration efficiency.

Combining Silk Sericin and Surface Micropatterns in Bacterial Cellulose Dressings to Control Fibrosis and Enhance Wound Healing

“…16 During the past few years, researches have revealed many encouraging facts and findings regarding the immense potential of graphenebased membranes for separating not only gases but also ions [17][18][19][20][21][22][23][24] and liquids (aqueous/non-aqueous). [25][26][27][28] In this concise review, we provide a brief synopsis of the recent advances in graphenebased gas-separable membranes and the challenges associated for their use as next-generation industrial membranes.…”

Bacterial cellulose/graphene oxide aerogels with enhanced dimensional and thermal stability

“…A simple way to improve the dimensional and mechanical stability of lightweight and hydrophilic GO based materials, especially in wet environments, consists on GO reduction, thus removing oxygen containing functional groups and, consequently, decreasing its original hydrophilicity (Wen, Wu, Zhang, Li, & Shi, 2017) (Xiong et al, 2018). Besides, the tailoring of GO surface chemistry by reduction could help to increase its reactivity for amphiphilicity-driven assembly strategy.…”

“…Besides, the tailoring of GO surface chemistry by reduction could help to increase its reactivity for amphiphilicity-driven assembly strategy. Recently, Xiong et al (Xiong et al, 2018) reported an efficient approach for constructing hybrid materials based on a net of 1D cellulose nanofibers wrapped in GO nanosheets. Their findings showed that the interface-driven assembly between the two components is mainly governed by the level of reduction of GO nanosheets, where highly reduced GO are tightly surrounded by a dense conformal nanocellulose network (Xiong et al, 2018).…”

“…Recently, Xiong et al (Xiong et al, 2018) reported an efficient approach for constructing hybrid materials based on a net of 1D cellulose nanofibers wrapped in GO nanosheets. Their findings showed that the interface-driven assembly between the two components is mainly governed by the level of reduction of GO nanosheets, where highly reduced GO are tightly surrounded by a dense conformal nanocellulose network (Xiong et al, 2018). Therefore, the morphology and dimensional stability of 3D bacterial cellulose/ graphene J o u r n a l P r e -p r o o f oxide (BC/GO) aerogels can be tailor-made by exploring different reduction strategies for improved interfacial hydrophobic-hydrophilic interactions between the individual nanoelements.…”

Pressure‐Driven Solvent Transport and Complex Ion Permeation through Graphene Oxide Membranes

“…For example, Yu et al fabricated various cation‐modified GO membranes and concluded that Al 3+ ‐crosslinked GO (Al‐GO) membrane is more stable than GO membranes crosslinked with mono and di‐valent cations . Furthermore, Xiong et al fabricated GO nanosheets encapsulated with cellulose nanofibers by manipulating the functional groups' interactions to form strong amphiphilic nanosheets that possess high water flux and efficiently reject dyes and gold nanoparticles . Another example is covalent crosslinking with poly(ethylene glycol) (PEG) by Coleman et al, who reported that PEG acts as a steric blocker to widen the interlayer distance between adjacent GO nanosheets .…”