College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China; Hunan Provincial Collaborative Innovation Center for High-efficiency Utilization of Wood and Bamboo Resources, Central South University of Forestry and Technology, Changsha 410004, PR China.
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China.
Int J Biol Macromol. 2017 Oct;103:1257-1264. doi: 10.1016/j.ijbiomac.2017.05.188. Epub 2017 Jun 3.
Dialdehyde starch was prepared by one-step synthesis of acid hydrolysis and oxidation, using corn starch as the raw material, sodium periodate (NaIO) as the oxidant, and hydrochloric acid (HCl) as the acid solution. The prepared dialdehyde starch was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and gel permeation chromatography (GPC). The results confirmed that oxidation occurred between the starch and NaIO. The acid hydrolysis reaction reduced the molecular weight of starch and effectively improved the aldehyde group contents (92.7%). Scanning electron microscope (SEM) analysis indicated that the average particle size decreased after acid hydrolysis and oxidation reaction. X-ray diffraction (XRD) and thermal gravimetric analyzer (TGA) analysis demonstrated that the crystallinity of the obtained dialdehyde starch showed a downward trend and a decelerated thermal decomposition rate. The starch after acid hydrolysis and oxidation exhibited lower hot paste viscosity and higher reactivity.
双醛淀粉通过酸解和氧化的一步合成反应制备而成，以玉米淀粉为原料，以高碘酸钠（NaIO）为氧化剂，盐酸（HCl）为酸溶液。通过傅里叶变换红外光谱（FT-IR）、X 射线光电子能谱（XPS）和凝胶渗透色谱（GPC）对制备的双醛淀粉进行了表征。结果证实，淀粉和 NaIO 之间发生了氧化反应。酸水解反应降低了淀粉的分子量，并有效提高了醛基含量（92.7%）。扫描电子显微镜（SEM）分析表明，酸水解和氧化反应后平均粒径减小。X 射线衍射（XRD）和热重分析仪（TGA）分析表明，所得双醛淀粉的结晶度呈下降趋势，热分解速率减缓。酸水解和氧化后的淀粉具有较低的热糊粘度和较高的反应性。
