The effects of crumb rubber on the properties and microstructure of modified starch degradable composites
The effects of crumb rubber on the properties and microstructure of modified starch degradable composites
复制标题
胶粉对变性淀粉可降解复合材料性能和微观结构的影响
DOI：
10.15376/biores.14.4.8304-8312
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发表时间：
2019
期刊：
影响因子：
1.5
通讯作者：
A. Yu.
中科院分区：
文献类型：
--
作者：
Xingxing Yang;Chunxia He;Xiaobo Li;Wen Wang;A. Yu.
以淀粉为基材，采用模压法，与胶粉（CR）共混，添加甘油、尿素、甲酰胺等增塑剂，制备了改性淀粉（MS）降解复合材料。测量了 MS 降解复合材料的机械性能和吸水性。通过傅里叶变换红外光谱（FT-IR）证实了官能团的变化，并用立体显微镜研究了官能团的变化，以分析复合材料的微观结构。结果表明，CR的添加显着改善了可降解复合材料的性能。当CR含量为MS的50wt%时，增强材料的界面性能和填料的分散程度得到改善。与未添加添加剂的复合材料相比，复合材料的拉伸强度和弯曲强度分别提高了107%和49.5%。与不含添加剂的复合材料相比，最小吸水率降低了78%。
Modified starch (MS) degraded composites were prepared via a molding method with starch as a substrate and a blending process with crumb rubber (CR) and added plasticizers such as glycerol, urea, and formamide. The mechanical properties and water absorbability of the MS degraded composites were measured. The functional group variations were confirmed by Fourier transform infrared spectroscopy (FT-IR), and the changes of the functional groups were investigated with a stereoscopic microscope to analyze the microstructure of the composites. The results indicated that the addition of CR substantially improved the performances of degradable composites. When the CR content was 50 wt% of the MS, the interfacial properties of the reinforced materials and the dispersing degree of the filler were improved. Compared with the composite without additive, the tensile strength and bending strength of the composites were increased by 107% and 49.5%, respectively. The minimum water absorption ratio was reduced by 78% compared with the composite without the additive.