中国塑料 ›› 2021, Vol. 35 ›› Issue (1): 1-7.DOI: 10.19491/j.issn.1001-9278.2021.01.001

• 材料与性能 •    下一篇

ZIF⁃67/聚磷腈复合微球的可控制备及表征

宋昆朋1, 王银杰1(), 方祝青2, 刘吉平1, 阮方1   

  1. 1.北京理工大学材料学院,北京 100081
    2.北京理工大学机电学院,北京 100081
  • 收稿日期:2020-07-30 出版日期:2021-01-26 发布日期:2021-01-22
  • 基金资助:
    特种民航飞机项目(MJ-2016-F-11)

Controllable Preparation and Characterizations of ZIF⁃67/Polyphosphazene Composite Microspheres

SONG Kunpeng1, WANG Yinjie1(), FANG Zhuqing2, LIU Jiping1, RUAN Fang1   

  1. 1.School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China
    2.School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China
  • Received:2020-07-30 Online:2021-01-26 Published:2021-01-22
  • Contact: WANG Yinjie E-mail:13439970074@163.com

摘要:

以聚(环三磷腈-co-4,4’-二羟基二苯砜)微球(PZS)作为ZIF-67晶体的生长基板,通过原位自组装法设计制备了一种新型核壳结构的ZIF-67/聚磷腈复合微球ZIF-67@PZS。通过调节原料配比确定了ZIF-67@PZS较佳的结构形貌。结果表明,在六水合硝酸钴∶2-甲基咪唑∶三乙胺的摩尔比为1∶4∶4,PZS与六水合硝酸钴的质量比为5∶1的条件下,制备的聚磷腈复合微球ZIF-67@PZS的品质较高;相较于ZIF-67和PZS,ZIF-67@PZS的初始分解温度分别提高了119 ℃和20 ℃,800 ℃的质量保留率分别提高了25.4 %和4.7 %,表现出更加优异的热稳定性能;通过观察梯度时间下的扫描电子显微镜照片,进一步推测了ZIF-67@PZS的可能形成机理。

关键词: 聚磷腈, ZIF-67, 合成机理, 形貌控制, 热性能

Abstract:

In this study, a new type of ZIF-67/polyphosphazene composite microspheres (ZIF-67@PZS) was designed and prepared by an insitu self-assembly method using poly(cyclotriphosphazene-co-4,4'-dihydroxydiphenylsulfone) microspheres (PZS) as a growth substrate for the ZIF-67 crystals. The optimum structural morphology of ZIF-67@PZS was determined by adjusting the mass ratio of raw materials. Scanning electron microscopy (SEM) characterizations indicated that the prepared ZIF-67@PZS presented a higher quality under a cobalt nitrate hexahydrate/2-methylimidazole/triethylamine molar ratio of 1/4/4 and a PZS/cobalt nitrate hexahydrate mass ratio of 5/1. The thermogravimetric analysis results showed that the initial decomposition temperature of ZIF?67@PZS increased by 119 and 20 °C and its residual char yield at 800 °C increased by 25.4 % and 4.7 % compared to pure ZIF-67 and PZS, respectively, indicating an excellent thermal stability. According to the SEM observation under the gradient time, the possible formation mechanism of ZIF-67@PZS was further deduced.

Key words: polyphosphazene, ZIF-67, synthesis mechanism, morphology control, thermal performance

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