亚微米级单分散的密胺树脂微球及其氮掺杂炭微球的制备(英文)
发布时间:2024-04-13 02:35
亚微米单分散三聚氰胺树脂微球和氮掺杂碳微球的可控制备仍是当今材料领域的一个重要课题。在不添加任何表面活性剂的情况下,仅使用适量的乙酸作为催化剂制备了最小粒径为200纳米的单分散MF微球,这比已报道的强酸制备的MF微球都要小。此外,随着搅拌时间的增加(0~48 h),MF微球的D50并不是简单地增加然后保持稳定,而是进一步下降,再次稳定,最后稳定后的粒径相比最大粒径发生明显收缩,收缩率约40%。在适当的热处理条件下,尤其是将物料均匀地薄薄地铺开,可以得到相应的单分散氮掺杂碳微球,其在800℃下的收缩率为81%~65%,收缩率与搅拌时间有关。最后,从分子形成的角度讨论了MF树脂微球和氮掺杂碳微球形成过程中的上述现象和规律。
【文章页数】:17 页
【文章目录】:
1 Introduction
2 Experimental
2.1 Materials
2.2 Preparation of monodisperse melamine-formaldehyde microspheres
2.3 Preparation of monodisperse nitrogen-doped carbon microspheres
2.4 Characterization
3 Results and discussion
3.1 Effect of the stirring time on the particle size
3.2 Effect of the acetic acid volume on the parti-cle size of MF microspheres
3.3 The formation conditions and particle size variation of monodisperse nitrogen-doped carbon microspheres
4 Conclusion
本文编号:3952350
【文章页数】:17 页
【文章目录】:
1 Introduction
2 Experimental
2.1 Materials
2.2 Preparation of monodisperse melamine-formaldehyde microspheres
2.3 Preparation of monodisperse nitrogen-doped carbon microspheres
2.4 Characterization
3 Results and discussion
3.1 Effect of the stirring time on the particle size
3.2 Effect of the acetic acid volume on the parti-cle size of MF microspheres
3.3 The formation conditions and particle size variation of monodisperse nitrogen-doped carbon microspheres
4 Conclusion
本文编号:3952350
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