论文部分内容阅读
采用溶液接枝聚合法,在异氰酸酯存在下,将聚乙二醇(PEG)分别链接到纤维素(Cell-OH)、纤维素醋酸酯(CDA)及纤维素月桂酸酯(LACE)骨架高分子材料上,制备了Cell-OH/PEG、CDA/PEG和LACE/PEG3种固-固相变储能材料,并通过FT-IR、TEM、POM、XRD和DSC等分析手段,对3种产物结构、结晶特性及相变储能性能等进行了比较研究。结果表明,随着与PEG接枝聚合的纤维素酯链的增长,所得产物形成酯链包裹PEG的胶囊的趋势越强,对PEG结晶的破坏程度越小,从而使产物的相变焓越高。
In the presence of isocyanates, polyethylene glycol (PEG) was linked to cellulose (Cell-OH), cellulose acetate (CDA) and cellulose laurate (LACE) The solid-state phase change energy storage materials of Cell-OH / PEG, CDA / PEG and LACE / PEG were prepared and characterized by FT-IR, TEM, POM, XRD and DSC. , Crystalline properties and phase change energy storage performance were compared. The results showed that with the increase of cellulose ester chains graft-polymerized with PEG, the stronger the tendency of the resulting products to form PEG-encapsulated ester chains, the less destruction of PEG crystals, and the higher the product enthalpy of phase transition .