134. Synthesis and characterization of designed cellulose-graft-polyisoprene copolymers
作者：Zhongkai Wang, Yaqiong Zhang, Feng Jiang, Huagao Fang and Zhigang Wang*
關鍵字：纖維素接枝聚異戊二烯，合成，表征
論文來源：期刊
具體來源：Polym. Chem., 2014, 5(10), 3379-3388
發表時間：2014年
在本文中我們報道了一種精心設計的新型接枝共聚物，該共聚物源自具備相反物理性質的兩種豐富的天然高分子：剛性且親水的纖維素和柔性且疏水的合成聚異戊二烯（天然橡膠的類似物），該接枝共聚物將剛性和柔性，疏水性和親水性有機結合在一個大分子中。所設計的纖維素-接枝-聚異戊二烯共聚物（Cell-g-PI）是通過均相補充催化劑和還原劑原子轉移自由基聚合（SARA ATRP）合成的。FT-IR, 1H NMR,13C NMR和TGA測試表明Cell-g-PI共聚物被成功制備。TEM和DMA實驗結果說明在Cell-g-PI共聚物中發生微相分離。水接觸角測試證明Cell-g-PI的疏水性隨著聚異戊二烯側鏈長度增加而增大。此外，通過自組織沉淀法可以制備水相中的核-殼結構的Cell-g-PI納米粒子。
In this work, we report an elegant design of novel graft
copolymers based on two natural abundant biopolymers with opposite
physical properties: rigid and hydrophilic cellulose, and flexible and
hydrophobic synthesized polyisoprene (analogue of natural rubber), which
combines rigidity and flexibility, hydrophobicity and hydrophilicity
all in one macromolecule. These cellulose-graft-polyisoprene (Cell-g-PI)
copolymers were synthesized via homogenous supplemental activator and
reducing agent atom transfer radical polymerization (SARA ATRP). FT-IR,
1H NMR, 13C NMR and TGA measurements demonstrate that Cell-g-PI
copolymers are successfully prepared. TEM and DMA results illustrate
that phase separation occurs in Cell-g-PI copolymers. Water contact
angle measurements verify that their hydrophobicity increases with
increasing polyisoprene side chain length. In addition, the core–shell
Cell-g-PI nanoparticles in water can be prepared via a self-organized
precipitation (SORP) method.