作者机构：
[刘文杰; 左迎峰; 吴义强; 肖俊华; 朱颖; 赵星] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[刘文杰; 左迎峰; 吴义强; 肖俊华; 朱颖; 赵星] 410004, China
通讯机构：
[Wu, Y.] S;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[肖俊华; 左迎峰; 吴义强; 刘文杰; 吴志平; 孟陶陶] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[肖俊华; 左迎峰; 吴义强; 刘文杰; 吴志平; 孟陶陶] 410004, China
通讯机构：
[Wu, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
期刊：
International Journal of Biological Macromolecules,2017年103:1257-1264 ISSN：0141-8130
通讯作者：
Wu, Yiqiang
作者机构：
[Xiao, Junhua; Zhu, Ying; Wu, Yiqiang; Zuo, Yingfeng; Liu, Wenjie; Zhao, Xing] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Wu, Yiqiang; Zuo, Yingfeng; Zhao, Xing] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Dialdehyde starch;Corn starch;Acid hydrolysis and oxidation;Sodium periodate;One-step method
摘要：
Dialdehyde starch was prepared by one-step synthesis of acid hydrolysis and oxidation, using corn starch as the raw material, sodium periodate (NaIO4) 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 NaIO4. 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.
摘要：
Esterified starch/polylactic acid (ES/PLA) blending composite was prepared by melting extrusion with maleic anhydride esterified starch and PLA as the raw materials. The composite was accelerated aging by using UV aging box, and its properties were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermo gravimetric analysis (TGA) and mechanical testing machine. FT-IR and SEM results show that the infrared absorption peak intensities of C-O, C-H, and C=O in aged samples decrease gradually with increasing aging time. The damage degree of surface and internal of aged samples increases gradually. XRD analysis results show that after aging treatment, the crystalline diffraction peak of thermoplastic esterified starch at 2θ = 21° disappears and the diffraction peaks of PLA at 2θ = 16.5° appear, indicating that the hydrolysis rate of esterified starch is greater than that of PLA. The crystallinity of PLA in aged sample shows an increasing trend at first followed by a decreasing one along with the increasing time of aging treatment, suggesting that the hydrolysis of amorphous regions of PLA is more preferential than its crystalline regions. Because of the influence of crystal structure and the change of composition structure, the initial decomposition temperature of aging test specimen gradually increases with the extension of aging time. The maximum decomposition rate temperature and residual mass increases at first, and then decrease after the aging time extending to 1 600 h. As the aging time increases, the damage degree of combination interface between esterification starch and PLA is exacerbated, resulting in the tensile strength and bending strength of aged specimen decreasing gradually.
期刊：
材料导报,2017年31(12):96-100 and 104 ISSN：1005-023X
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[肖俊华; 王健; 左迎峰; 吴义强] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[詹满军] Guangxi Fenglin Wood Industry Group Co. Ltd., Nanning;530031, China;[陈秀兰] Dare Wood-based Panel Group Co. Ltd., Zhenjiang
通讯机构：
[Wu, Y.] C;College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[左迎峰; 吴义强; 佘佳荣; 郭鑫; 江萍] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[顾继友] Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin;150040, China;[左迎峰; 吴义强; 佘佳荣; 郭鑫; 江萍] 410004, China
通讯机构：
[Wu, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[左迎峰; 赵星; 吴义强] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha;410004, China;[张彦华; 顾继友] College of Material Science & Engineering, Northeast Forestry University, Harbin;150040, China;[左迎峰; 赵星; 吴义强] 410004, China
通讯机构：
[Wu, Y.] C;College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, China
期刊：
建筑材料学报,2016年19(5):860-865 and 882 ISSN：1007-9629
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[李新功; 吴义强; 张新荔; 朱晓丹; 左迎峰; 李贤军] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[龙柯全; 吴义强; 肖俊华; 李贤军; 左迎峰] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
通讯机构：
[Wu, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, Hunan, China
