室温下多重交联高性能高直链玉米淀粉膜的制备及性能  

Preparation and Properties of High-Performance High Amylose Corn Starch Films with Multiple Crosslinking at Room Temperature

作　　者：马小飞 李君[1] 刘正平[1] Xiao-fei Ma;Jun Li;Zheng-ping Liu(College of Chemistry,Beijing Normal University,Beijing 100875)

机构地区：[1]北京师范大学化学学院,北京100875

出　　处：《高分子学报》2025年第3期408-419,共12页Acta Polymerica Sinica

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.

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 

分 类 号：TB383.2[一般工业技术—材料科学与工程]