Methods for Extraction of Nanocellulose from Various Sources / Characterization of Various Kinds of Nanocellulose / Surface Modification of Nanocellulose / Self-Assembly of Native Cellulose Nanostructures / Thermoplastic Cellulose Nanocomposites / Elastomeric Nanocomposites Reinforced with Nanocellulose and Nanochitin / Thermoset Cellulose Nanocomposites: Flammability Characteristics / Hybrid Filler (Cellulose/Noncellulose) Reinforced Nanocomposites / Fully Green Cellulose Nanocomposites / Coupling Agent Usage in the Preparation of Cellulose Nanofibril (CNF)- and Cellulose Nanocrystal (CNC)-Based Nanocomposites / Microscopic Analysis of Cellulose Nanofibril (CNF)- and Cellulose Nanocrystal (CNC)-Based Nanocomposites / Mechanical Properties of Cellulose Nanofibril (CNF)- and Cellulose Nanocrystal (CNC)-Based Nanocomposites / Dynamic Mechanical Characterization of Cellulose Nanofibril CNF- and Cellulose Nanocrystal CNC-Based Nanocomposites / Rheological Properties of Nanocomposites Based on Cellulose Nanofibrils and Cellulose Nanocrystals / Thermal Properties of Cellulose Nanocomposites / Crystallization Behavior of Cellulose Nanocomposites and Cellulose Nanofibril-Reinforced Polymer Nanocomposites / Spectroscopy Studies of Cellulose Nanofiber- and Cellulose Nanocrystal-Based Nanocomposites / Raman Spectroscopy of CNC- and CNF-Based Nanocomposites / Dielectric Spectroscopy: An Efficient Tool to Study the Interfacial Adhesion and Properties of Natural Rubber/Nanocellulose-Based Green Nanocomposites / Water Sorption and Barrier Properties of Cellulose Nanocomposites / Environmental Health and Safety of Cellulose Nanomaterials and Composites / Superhydrophobic and Superoleophobic Nanostructured Cellulose and Cellulose Composites / Commercialization of Cellulose Nanofibril (CNF) and Cellulose Nanocrystal (CNC): Pathway and Challenges / Cellulose Nanocrystals and Nanofibrils in Advanced Applications