Recent advances in cellulose and its derivatives for oilfield applications.

Micro- and nano-celluloses derived from hemp stalks and their effect as polymer reinforcing materials

Nanogenerators, as emerging energy generation devices, can effectively collect and utilize tiny energy in the environment. Recently, the development of cellulose based functional materials for nanogenerators has become a competing research topic. However, there are limited review literatures on cellulose-based nanogenerators. This paper presents a detailed classification of triboelectric nanogenerators and piezoelectric nanogenerators, and the latest research progress of cellulose-based nanogenerators (including nanocellulose, cellulose derivatives, and cellulose-based composites). Strategies and principles of improving the output performance of cellulose-based nanogenerators are further summarized. Studies have demonstrated that using cellulose instead of traditional petroleum-based polymers as the substrate material of nanogenerators can effectively solve the environmental pollution problem caused by the non-biodegradability of conventional polymers. Finally, the current challenges and future development directions of cellulose-based nanogenerators are proposed. Recent strategies and advances in the fabrication of cellulose-based nanogenerators and their applications were comprehensively reviewed.

Fabrication and applications of cellulose-based nanogenerators

Biopolymers have been used as a replacement material for synthetic polymers in scaffold forming due to its biocompatibility and nontoxic properties. Production of scaffold for tissue repair is a major part of tissue engineering. Tissue engineering techniques for scaffold forming with cellulose-based material is at the forefront of present-day research. Micro- and nanocellulose-based materials are at the forefront of scientific development in the areas of biomedical engineering. Cellulose in scaffold forming has attracted a lot of attention because of its availability and toxicity properties. The discovery of nanocellulose has further improved the usability of cellulose as a reinforcement in biopolymers intended for scaffold fabrication. Its unique physical, chemical, mechanical, and biological properties offer some important advantages over synthetic polymer materials. This review presents a critical overview of micro- and nanoscale cellulose-based materials used for scaffold preparation. It also analyses the relationship between the method of fabrication and properties of the fabricated scaffold. The review concludes with future potential research on cellulose micro- and nano-based scaffolds. The review provides an up-to-date summary of the status and future prospective applications of micro- and nanocellulose-based scaffolds for tissue engineering.

https://www.mdpi.com/2073-4360/12/9/2043/pdf

Huiming Gu

Papers

Fabrication and characterization of cellulose nanoparticles from maize stalk pith via ultrasonic-mediated cationic etherification.