各位, 我制备了多孔聚苯乙烯(PS)模板(PS没有交联),孔道是连续相通且是规则分布(尺寸在40nm左右),然后在室温下把甲阶酚醛树脂导入PS模板的孔道内进行固化,60℃12h,然后90℃12h,120℃2h,之后按照文献“Macromolecules 2010, 43, 2960–2969” 中进行碳化:
First, the samples were heated from 150℃ to
450 ℃ at the heating rate of 1℃/min and held at 450℃ for
180 min. The samples were further heated from 450℃ to 600℃at
the heating rate of 1 ℃/min. Thereafter, the temperature was
then increased up to 800℃ at the heating rate of 5℃/min, and
the samples were held at 800 ℃ for 180 min to access a complete
carbonization. In all cases, the pyrolysis (and/or carbonization)
was carried out in the atmosphere of highly pure nitrogen. The
gaseous products during the pyrolysis were purged by the
nitrogen at the flow rate of 10 mL /s.
可是碳化后,所得碳材料进行SEM表征,却发现很少保留PS模板的微结构,倒是有好多纳米棒。请问各位,怎样才能使碳化后的产物保留PS模板的微结构?请各位给些建议。多谢了! |