表面改性焚烧污泥灰作为增强填料对聚乳酸复合材料机械性能和热性能的影响

IF 3.6 4区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES Journal of Thermoplastic Composite Materials Pub Date : 2024-03-20 DOI:10.1177/08927057241241503
Hao Sun, Lu Liu, Siyang Hu, Lingjun Wei, Haiying Chen, Huixing Nan, Mingwei Li, Dongshuai Yan
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引用次数: 0

摘要

可生物降解热塑性塑料聚乳酸(PLA)由于成本高昂,近来在更广泛的开发和应用方面受到了限制。因此,通过添加填料来开发低成本、高性能的聚乳酸基复合材料至关重要。本研究采用表面改性的焚烧污水污泥灰(M-OH-ISSA)作为聚乳酸的增强填料,制备了不同M-OH-ISSA比例(10-30 wt%)的聚乳酸/M-OH-ISSA热塑性复合材料,并探索了聚乳酸/M-OH-ISSA复合材料的成型机理。通过NaOH碱处理和KH570硅烷接枝对焚烧污水污泥灰(ISSA)表面进行改性以改善界面粘附性,成功地将硅烷基团接枝到ISSA表面,使其表面由亲水转变为疏水,增强了ISSA与聚乳酸的相容性。研究了 M-OH-ISSA 含量对聚乳酸复合材料机械性能和热性能的影响。力学测试结果表明,与纯聚乳酸相比,15 wt% M-OH-ISSA 填充聚乳酸复合材料的拉伸和弯曲性能优异,强度分别为 33.67 MPa 和 73.70 MPa,均是纯聚乳酸的 1.6 倍。通过扫描电镜进行的形态分析表明,含有 15 wt% M-OH-ISSA 的复合材料在 M-OH-ISSA 与基体之间表现出良好的粘附性。使用差示扫描量热法(DSC)和热重分析法(TG/DTG)测定了复合材料的热性能。结果表明,复合材料的结晶度随 M-OH-ISSA 含量的增加而增加,290°C 至 400°C 之间的热稳定性随 M-OH-ISSA 含量的增加而略有下降。不过,复合材料在 200°C 附近具有良好的热稳定性,在此温度下加工不会发生热降解。作为复合材料的填料,M-OH-ISSA 可以减少聚乳酸的用量并改善聚合物的性能,从而将聚乳酸/M-OH-ISSA 复合材料应用于包装和 3D 打印领域。
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Effect of surface-modified incinerated sewage sludge ash as a reinforcing filler on the mechanical and thermal properties of polylactic acid composites
Biodegradable thermoplastic polylactic acid (PLA) has recently been limited in its broader development and application due to its high cost. Therefore, it is crucial to develop low-cost and high-performance PLA-based composites by adding fillers. In this study, surface-modified incinerated sewage sludge ash (M-OH-ISSA) was employed as a reinforcing filler in PLA to prepare PLA/M-OH-ISSA thermoplastic composites with varying M-OH-ISSA ratios (10–30 wt%), and the mold mechanism for the PLA/M-OH-ISSA composites was explored. The surface of incinerated sewage sludge ash (ISSA) was modified to improve interfacial adhesion by NaOH alkali treatment and KH570 silane grafting, which successfully grafted silane groups onto the surface of the ISSA and converted the surface from hydrophilic to hydrophobic, strengthening the compatibility between the ISSA and PLA. The effects of the M-OH-ISSA content on the mechanical and thermal properties of the PLA composites were investigated. The mechanical test results showed that the tensile and flexural properties of the 15 wt% M-OH-ISSA-filled PLA composites were excellent compared to those of pure PLA, with strengths of 33.67 MPa and 73.70 MPa, respectively, which are all 1.6 times greater than those of pure PLA. Morphological analysis via SEM indicated that the composites with 15 wt% M-OH-ISSA exhibited good adhesion between the M-OH-ISSA and the matrix. The thermal performance of the composites was determined by using differential scanning calorimetry (DSC) and thermogravimetric analysis (TG/DTG). The results showed that the crystallinity of the composites increased with increasing M-OH-ISSA content and that the thermal stability between 290°C and 400°C decreased slightly with increasing M-OH-ISSA. However, the composites have good thermal stability near 200°C and do not undergo thermal degradation if processed at this temperature. As a filler in composites, M-OH-ISSA can reduce PLA usage and improve polymer properties, applying PLA/M-OH-ISSA composites in packaging and 3D printing applications.
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来源期刊
Journal of Thermoplastic Composite Materials
Journal of Thermoplastic Composite Materials 工程技术-材料科学:复合
CiteScore
8.00
自引率
18.20%
发文量
104
审稿时长
5.9 months
期刊介绍: The Journal of Thermoplastic Composite Materials is a fully peer-reviewed international journal that publishes original research and review articles on polymers, nanocomposites, and particulate-, discontinuous-, and continuous-fiber-reinforced materials in the areas of processing, materials science, mechanics, durability, design, non destructive evaluation and manufacturing science. This journal is a member of the Committee on Publication Ethics (COPE).
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