Biomass Molecular Engineering Center, Department of Materials Science and Engineering, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, Anhui 230036, China.
Biomass Molecular Engineering Center, Department of Materials Science and Engineering, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, Anhui 230036, China.
Int J Biol Macromol. 2022 Jun 1;209(Pt B):1848-1857. doi: 10.1016/j.ijbiomac.2022.04.159. Epub 2022 Apr 26.
In this work, sustainable cellulose-g-poly(lauryl acrylate-co-acrylamide) [Cell-g-P(LA-co-AM)] bottlebrush copolymer elastomers derived from cellulose and plant oil were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. Differential scanning calorimeter (DSC) results indicate that these thermally stable Cell-g-P(LA-co-AM) bottlebrush copolymer elastomers show adjustable melting temperatures. Monotonic and cyclic tensile tests suggest that the mechanical properties, including tensile strength, extensibility, Young's modulus, and elasticity, can be conveniently controlled by changing the LA/AM feed ratio and cellulose content. In such kind of bottlebrush copolymer elastomers, the rigid cellulose backbones act as cross-linking points to provide tensile strength. The incorporated PAM segments can form additional network structure via hydrogen bonding, resulting in enhanced tensile strength but decreased extensibility when more PAM segments are introduced. This versatile strategy can promote the development of sustainable cellulose-based bottlebrush copolymer elastomers from renewable resources.
在这项工作中，通过可逆加成-断裂链转移（RAFT）聚合，合成了源自纤维素和植物油的可持续性纤维素接枝聚（月桂基丙烯酰胺-co-丙烯酰胺）[Cell-g-P（LA-co-AM）]刷型共聚物弹性体。差示扫描量热法（DSC）结果表明，这些热稳定的 Cell-g-P（LA-co-AM）刷型共聚物弹性体具有可调节的熔融温度。单调和循环拉伸测试表明，通过改变 LA/AM 的进料比和纤维素含量，可以方便地控制力学性能，包括拉伸强度、伸长率、杨氏模量和弹性。在这种刷型共聚物弹性体中，刚性纤维素主链作为交联点提供拉伸强度。引入的 PAM 段可以通过氢键形成额外的网络结构，当引入更多的 PAM 段时，会导致拉伸强度增强，但伸长率降低。这种多功能策略可以促进可持续性纤维素基刷型共聚物弹性体从可再生资源中发展。
