N-甲基-吗啉-N-氧化物(NMMO)最初被用作淀粉的增塑剂以生产热塑性小麦淀粉。随后,滑石粉用作增强填料,以增强热塑性生物质基复合塑料的机械强度。化学结构,晶体结构,和微观形态进行了分析,采用傅里叶变换红外光谱,X射线衍射,和扫描电子显微镜。此外,通过热重分析探索了热性能,差示扫描量热法,和动态力学分析。水合NMMO增塑剂对淀粉表现出突出的增塑效果,导致复合材料具有显着的机械性能。事实上,用水合NMMO增塑的纯热塑性小麦淀粉表现出迄今为止记录的最高机械强度,抗拉强度高达9.4MPa。此外,滑石粉显示出明显的增强作用。当滑石粉含量达到30wt%时,目标复合材料实现了20.5MPa的拉伸强度和177.9MPa的杨氏模量。这些值分别高出118%和48%,分别,比纯热塑性淀粉样品。这种创新的塑化方法为开发具有潜在应用前景的高机械强度热塑性生物质基复合塑料开辟了新途径。
N-methyl-morpholine-N-oxide (NMMO) was initially created as a plasticizer for starch to produce
thermoplastic wheat starch. Subsequently, talc powder was used as a reinforcing filler to enhance the mechanical strength of
thermoplastic biomass-based composite plastics. The chemical structure, crystal structure, and microscopic morphology were analyzed using Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. Additionally, the thermal properties were explored through thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis. The hydrated NMMO plasticizer demonstrated an outstanding plasticizing effect on starch, resulting in a composite with remarkable mechanical properties. In fact, the pure
thermoplastic wheat starch plasticized with hydrated NMMO exhibited the highest mechanical strength recorded so far, with a tensile strength of up to 9.4 MPa. In addition, talcum powder displayed a noticeable reinforcing effect. When the talcum powder content reached 30 wt%, the targeted composite achieved a tensile strength of 20.5 MPa and a Young\'s modulus of 177.9 MPa. These values were 118 % and 48 % higher, respectively, than those of the pure
thermoplastic starch sample. This innovative plasticizing method opens up a new avenue for the development of high-mechanical-strength
thermoplastic biomass-based composite plastics with promising potential applications.