摘要
星型羟丙基木质素(HL)填充大豆蛋白(SPI),得到具有良好力学性能的可生物降解SPI/HL复合材料(SL)。复合材料的结构和性能被XRD、DSC、SEM、TEM和拉力测试表征。结果表明:仅仅加入质量分数2%的HL就在大豆蛋白塑料伸长率基本不变下,使拉伸强度达到16.8 MPa,提高了2.3倍。随HL含量的增加,HL诱导形成纳米尺度的超分子特征的微区。虽然超分子微区使强度得到进一步提高,但却导致甘油在SPI基质中缺失,材料变脆、综合性能下降。当HL以单分子形式存在于复合材料中时,伸展的支链能够将SPI中的杂微区相互联系在一起,得到最优力学性能的复合材料。
Biodegradable soy protein （SPI） plastics were compounded with star-like hydroxypropyl lignin （HL） to produce SPI/HL composite sheets with good mechanical performance. The structure and properties of composite materials were charac terized by X ray diffraction, differential scanning calorimetry, scanning electron microscopy, transmission electron microscopy and tensile test. It was worth noting that adding only 2% HL resulted in tensile strength of 16.8 MPa as much as 2.3-fold over that of pure SPI sheets without the elongation loss. As the HL content increased, HL can self-aggregate as supramoleeular domain at nano scale, and the stronger interactions between HL and glycerol resulted in the absence of glycerol in SPI matrix. Thus, although the strength of composite materials increased, the elongation sharply decreased. It can be concluded that the filling of HL as simple molecule into SPI matrix would provide the optimal mechanical properties in this system by the stronger ability of stretching chains to adhere hybrid components in SPI matrix.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2006年第5期57-59,共3页
Journal of Wuhan University of Technology
基金
华南理工大学制浆造纸工程国家重点实验室开放基金(200514)
关键词
大豆蛋白
木质素
共混
增强
超分子结构
soy protein
lignin
blend
strengthening
supramolecular structure
