KH570/SA/SDBS改性硅灰石纤维增强聚碳酸酯复合材料力学性能和热学性能对比研究,Polymer Composites

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KH570/SA/SDBS改性硅灰石纤维增强聚碳酸酯复合材料力学性能和热学性能对比研究
Polymer Composites ( IF 4.8 ) Pub Date : 2022-08-20 , DOI: 10.1002/pc.26975
Feng Chen _{1,

2} , Yongzhong Bao ₁ , Jiamin Zhang ₃ , Ming Yang ₂ , Min Ruan ₂ , Wei Feng ₂ , Yufeng Jiang ₂ , Ming Li ₂ , Yue Chen ₂

Affiliation

为了提高硅灰石（Wo）在聚碳酸酯（PC）聚合物中的适用性，使用不同的改性剂对Wo进行表面改性，包括硅烷偶联剂KH570、硬脂酸（SA）和十二烷基苯磺酸钠。对改性 Wo 的物理、物理化学和应用性能进行了评估。结果表明，KH570改性Wo具有更窄的粒径分布、更高的绝对zeta电位和更均匀的分布。扫描电镜研究证实了它们在改性过程中的形态和纵横比的变化。使用 KH570 改性 Wo 的 Wo/PC 复合材料的拉伸强度优于使用原始 Wo 或其他改性剂改性样品的拉伸强度。通过添加 15 wt% KH570 改性 Wo 获得 65 ± 1 MPa 的最大抗拉强度。热分析表明，在聚碳酸酯中添加 Wo 增加了残留物含量，但略微降低了热分解温度和玻璃化转变温度，无论是未改性的还是改性的 Wo。这些结果表明，经过良好改性的 Wo 矿物具有替代昂贵的碳纤维和玻璃纤维作为聚碳酸酯产品填料的潜力。

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Comparative study on the mechanical and thermal properties of polycarbonate composites reinforced by KH570/SA/SDBS modified wollastonite fibers

In order to increase the applicability of wollastonite (Wo) in polycarbonate (PC) polymer, surface modification of Wo was carried out using different modifiers containing silane coupling agent KH570, stearic acid (SA), and sodium dodecylbenzene sulfonate. The physical, physic-chemical, and application properties of modified Wo were evaluated. Results showed that KH570 modified Wo had narrower particle size distribution, higher absolute zeta potential and were more evenly distributed. Scanning electron microscope study confirmed their changes in morphology and aspect ratio during the modification process. The tensile strength of Wo/PC composites, in which KH570-modified Wo was used were superior to those in which original Wo or other modifiers modified samples were used. The maximum tensile strength of 65 ± 1 MPa was obtained by adding 15 wt% KH570-modified Wo. Thermal analysis indicated that adding Wo to the polycarbonate increased the residue content but decreased the thermal decomposition temperature and glass transition temperature slightly, regardless of unmodified or modified Wo. These results indicated that the well-modified Wo mineral had the potential to replace expensive carbon and glass fibers as fillers in polycarbonate products.

更新日期：2022-08-20

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