摘要
室温常压下高直链玉米淀粉(HACS)在水中不能溶解,这限制了其在可降解包装薄膜领域的应用.本文中采用四丁基氢氧化铵(TBAH)水溶液作为溶剂,实现了室温常压下HACS的溶解,并通过分子链的多重交联(同时具备物理交联、配位键交联和共价键交联)制备了高性能HACS薄膜.采傅里叶红外光谱、原子力显微镜、X射线衍射及拉伸实验表征了薄膜的结构、表面形貌、结晶性及力学性能.结果表明,与单重物理交联和双重交联(物理-配位键交联、物理-共价键交联)的HACS膜相比,多重交联薄膜的表面粗糙度和结晶性均更低,薄膜的力学性能更强,断裂伸长率为65%,拉伸强度达3.18 MPa.本文工作为开发高性能淀粉基薄膜材料提供了新的思路和方法.
High amylose corn starch(HACS)is insoluble in water at room temperature and atmospheric pressure,which limits its applications in biodegradable packaging films.This study employed a tetrabutylammonium hydroxide(TBAH)aqueous solution as a solvent to achieve the dissolution of HACS at room temperature and atmospheric pressure.Subsequently,high-performance HACS films were fabricated through multiple crosslinking of polymer chains,including physical,coordination,and covalent crosslinking.The structure,surface morphology,crystallinity,and mechanical properties of the films were characterized using infrared spectroscopy,atomic force microscopy,X-ray diffraction,and tensile testing.Results demonstrated that compared to HACS films with single physical crosslinking and double crosslinking(physical-coordinated crosslinking and physical covalent crosslinking),the multiple crosslinked films exhibited lower surface roughness and crystallinity,along with enhanced mechanical properties.The multiple crosslinked films exhibited a tensile strength of 3.18 MPa and an elongation at break of 65%.This study provides a novel approach and strategy for the development of high performance starch-based film materials.
作者
马小飞
李君
刘正平
Xiao-fei Ma;Jun Li;Zheng-ping Liu(College of Chemistry,Beijing Normal University,Beijing 100875)
出处
《高分子学报》
北大核心
2025年第3期408-419,共12页
Acta Polymerica Sinica
关键词
高直链玉米淀粉
四丁基氢氧化铵
室温溶解
多重交联
力学性能
High amylose corn starch
Tetrabutylammonium hydroxide
Room-temperature dissolution
Multiple crosslinking
Mechanical properties
