ABSTRACT
Recently, important progress has been made for cellulose and its derivatives with new modi- cation strategies based on the copper(I)-catalyzed Huisgen 1,3-dipolar cycloaddition of azide and alkyne (CuAAC) click chemistry (Figure 25.1). Since the pioneering work of Sharpless and coworkers on CuAAC click chemistry1,2 and its rst application to polymer chemistry in 2004,3 CuAAC
25.1 Introduction .......................................................................................................................... 569 25.2 PreClick Modication of Cellulose and Cellulose Derivatives for
CuAAC Click Chemistry ...................................................................................................... 571 25.3 Advanced Cross-Linked Cellulose-Based Networks by CuAAC Click Chemistry ............. 573
25.3.1 Cross-Linked Cellulose-Based Structural Materials ................................................ 573 25.3.2 Cross-Linked Cellulose-Based Hydrogels ................................................................ 576
25.4 Block and Graft Cellulosic Copolymers by CuAAC Click Chemistry ................................ 578 25.5 Dendronized Celluloses by CuAAC Click Chemistry ......................................................... 582 25.6 Cellulosic Polyelectrolytes by CuAAC Click Chemistry ..................................................... 584 25.7 Advanced Cellulose (Nano)Materials by CuAAC Surface Modication ............................. 588
25.7.1 Advanced Materials by Cellulose Surface Modication .......................................... 588 25.7.2 Advanced Materials by Nanocellulose Surface Modication .................................. 589
25.7.2.1 Advanced Nanomaterials by Cellulose Nanocrystal Modication ............ 591 25.7.2.2 Advanced Nanomaterials by Cellulose Nanobril Modication ............... 591
25.8 Conclusion ............................................................................................................................ 593 Acknowledgment ........................................................................................................................... 595 References ...................................................................................................................................... 595
click chemistry has become one of the best approaches to complex macromolecular architectures and polymer modication.4-10
Over the past few years, CuAAC click chemistry has offered new ways of modifying cellulose and its derivatives in particular mild conditions and with hydrolytically stable triazole linkers. Its high reliability, efciency, and tolerance of different functional groups have contributed to developing great structural and functional variety for cellulosic materials. According to the work of Liebert et al. on the rst modication of cellulose by CuAAC click chemistry11 and to related recent reviews on polysaccharides,10,12,13 CuAAC click chemistry still offers opportunities for polysaccharide modication with great potential for a wide range of applications in smart packaging, advanced food, health care, drug delivery, biomaterials, biosensors, bactericidal and antifouling materials, biofunctional lms, etc.
