School of Materials Science and Engineering, University of Jinan, Jinan 250000, China.
School of Civil Engineering and Architecture, University of Jinan, Jinan 250000, China.
Molecules. 2022 Dec 8;27(24):8668. doi: 10.3390/molecules27248668.
An attempt at the treatment of the waste fiber (WF) from the wind turbine blade (WTB) was made through the modifier of dopamine hydrochloride and the compound modifier of dopamine hydrochloride and 2,5-dihydroxy terephthalic acid or 3,4-dihydroxy cinnamic acid or 3,4-dihydroxy benzonitrile, corresponding to obtain four modified waste fibers (MWF1, MWF2, MWF3, and MWF4). The MWFs samples' microstructure properties were characterized using SEM, EDS, XPS, FTIR analyses, and water contact angle tests. The results revealed that all the MWF surfaces were wrapped by a distinct coating layer and had different elemental compositions and chemical groups, demonstrating the significant effect of the four modifications on the WF surfaces. The hydroxyl, amino, or nitrile groups were grafted onto the WF surfaces causing improvement of the hydrophilicity and reactivity. Furthermore, all the MWFs as the reinforced materials were incorporated into the industrial waste phosphogypsum (PG) to manufacture the phosphorous-building gypsum composites (PBGC). The effects on the micro-morphology and mechanical properties of the PBGC were evaluated. The results also show the improvement in flexural and compressive strength with the addition of MWFs into the PBGC, due to the enhancement of the compactness between the MWF and phosphogypsum matrix. In particular, the effects of three compound modifiers on the flexural and compressive strength are more significant. The highest flexural and compressive strength was contributed by the PBGC-MWF4 with 2% dosage using a compound modifier of dopamine hydrochloride and 3,4-dihydroxy benzonitrile, which were enhanced 61.04% and 25.97% compared with the PBG.
尝试通过盐酸多巴胺修饰剂和盐酸多巴胺与 2,5-二羟基对苯二甲酸或 3,4-二羟基肉桂酸或 3,4-二羟基苯甲腈的复合修饰剂对风力涡轮机叶片（WTB）的废纤维（WF）进行处理，相应地得到四种改性废纤维（MWF1、MWF2、MWF3 和 MWF4）。使用 SEM、EDS、XPS、FTIR 分析和水接触角测试对 MWF 样品的微观结构特性进行了表征。结果表明，MWF 表面均被明显的包覆层包裹，且具有不同的元素组成和化学基团，表明四种改性剂对 WF 表面具有显著的影响。羟基、氨基或腈基接枝到 WF 表面，导致亲水性和反应性提高。此外，所有 MWF 作为增强材料均被掺入工业废磷石膏（PG）中，以制造磷石膏建筑石膏复合材料（PBGC）。评估了对 PBGC 微观形貌和机械性能的影响。结果还表明，由于 MWF 和磷石膏基体之间的致密性增强，添加 MWF 可提高 PBGC 的弯曲和抗压强度。特别是，三种复合改性剂对弯曲和抗压强度的影响更为显著。当添加量为 2%的复合改性剂盐酸多巴胺和 3,4-二羟基苯甲腈时，PBGC-MWF4 的弯曲和抗压强度最高，与 PBG 相比，分别提高了 61.04%和 25.97%。
