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sdzzdz木蟲 (小有名氣)
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[求助]
模板法所得碳材料為何沒保持模板的微結(jié)構(gòu)?
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各位, 我制備了多孔聚苯乙烯(PS)模板(PS沒有交聯(lián)),孔道是連續(xù)相通且是規(guī)則分布(尺寸在40nm左右),然后在室溫下把甲階酚醛樹脂導(dǎo)入PS模板的孔道內(nèi)進(jìn)行固化,60℃12h,然后90℃12h,120℃2h,之后按照文獻(xiàn)“Macromolecules 2010, 43, 2960–2969” 中進(jìn)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,所得碳材料進(jìn)行SEM表征,卻發(fā)現(xiàn)很少保留PS模板的微結(jié)構(gòu),倒是有好多納米棒。請問各位,怎樣才能使碳化后的產(chǎn)物保留PS模板的微結(jié)構(gòu)?請各位給些建議。多謝了! |
多孔碳材料 |
木蟲 (小有名氣)
鐵桿木蟲 (知名作家)

金蟲 (初入文壇)
銀蟲 (小有名氣)
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