Page 198 - 《精细化工》2023年第8期

第 40 卷第 8 期 精 细 化 工 Vol.40, No.8
20 23 年 8 月 FINE CHEMICALS Aug. 2023

食品与饲料用化学品
超声对不同粒径二氧化硅改性热塑性

木薯淀粉的影响

刘钰馨 1,2 ，吴儒龙 1,2 ，梁泽升 1,2 ，廖梁燕 1,2 ，杨 芳 1,2 ，李媛媛 1,2

（1. 南宁师范大学 化学与材料学院，广西 南宁 530001；2. 南宁师范大学 广西天然高分子化学与物理
重点实验室，广西 南宁 530001）

摘要：通过熔融共混模压法制得了热塑性木薯淀粉（TPS）/SiO 2 复合材料。采用 DSC、偏光（PLM）、水接触
角、TG、SEM、FTIR、XRD 考察了超声作用下不同粒径（0.02、0.2、23 µm）SiO 2 对热塑性木薯淀粉的回生熔
融焓、回生速率、回生指数及球晶形态结构、水接触角、热稳定性的影响。结果表明，超声作用使 TPS/SiO 2 复
合材料的熔融焓增加、回生速率提高、回生指数降低，且添加粒径 0.02 µm SiO 2 制得 TPS/SiO 2 复合材料的回生
速率提升幅度最大；超声作用使 TPS/SiO 2 复合材料球晶变得明显、水接触角提高；超声作用使复合材料的水分
容易挥发，甘油与淀粉的结合能力增强，淀粉的分子结构稳定性增加；超声作用使 SiO 2 粒子在基体中聚集减少、
分散更好；复合材料的回生程度增加，双螺旋结构减少；复合材料呈现出 A+V 晶型，超声作用后，复合材料 V
晶型增加、A 晶型减少。
关键词：热塑性木薯淀粉；SiO 2 ；超声作用；回生行为；结构；食品化学品
中图分类号：O636.1+2； TB332 文献标识码：A 文章编号：1003-5214 (2023) 08-1812-07

Effect of ultrasound on thermoplastic cassava starch modified
by silica with different particle sizes

1,2
1,2
1,2
1,2
LIU Yuxin , WU Rulong , LIANG Zesheng , LIAO Liangyan ,
1,2
1,2
YANG Fang , LI Yuanyuan
（1. College of Chemistry and Materials Science, Nanning Normal University, Nanning 530001, Guangxi, China; 2. Key
Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, Guangxi, China）
Abstract: Thermoplastic cassava starch (TPS)/SiO 2 composites were prepared by melt blending and
molding methods. The effects of SiO 2 with different particle sizes (0.02, 0.2, 23 µm) on the retrogradation
melting enthalpy, retrogradation rate, retrogradation index, spherulite morphology, water contact angle and
thermal stability of thermoplastic cassava starch under ultrasonic treatment were studied by DSC,
polarization (PLM), water contact angle, TG, SEM, FTIR and XRD. The results indicated that ultrasonic
treatment led to the increment of enthalpy retrogradation, enhancement of the retrogradation rate, and
reduction of the retrogradation index. The retrogradation rate of the TPS/SiO 2 composites with 0.02 µm
SiO 2 added increased the most. Ultrasonic treatment made the spherulite of TPS/SiO 2 composites become
more obvious, the water contact angle increase, the moisture in the composite easier to volatilize, the
bonding between glycerol and starch enhance, and the molecular structure stability of starch increase.
Furthermore, ultrasonic treatment made the SiO 2 particles aggregate less and disperse better in the matrix,
the degree of retrogradation increase, while the degree of the double helix structure decrease. The
composites was presented in the form of A+V type crystal, with the V type crystal increased and the A type
crystal reduced after ultrasonic treatment.

收稿日期：2022-10-21; 定用日期：2023-01-28; DOI: 10.13550/j.jxhg.20220967
基金项目：广西自然科学基金项目（2020GXNSFAA159113）
作者简介：刘钰馨（1979—），女，教授，E-mail：liuyuxin889@126.com。