Entrainer Effect of N,N-Dimethylformamide on Solubility of Monomers for Aromatic Polyimide in Supercritical Carbon Dioxide
Entrainer Effect of N,N-Dimethylformamide on Solubility of Monomers for Aromatic Polyimide in Supercritical Carbon Dioxide
复制标题
N,N-二甲基甲酰胺夹带剂对芳香族聚酰亚胺单体在超临界二氧化碳中溶解度的影响
DOI：
10.1021/ie2013289
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发表时间：
2011
影响因子：
4.2
通讯作者：
Shigeki Takishima
中科院分区：
文献类型：
--
作者：
Masashi Haruki;N. Fukui;Fumiya Kobayashi;S. Kihara;Shigeki Takishima
采用半间歇流动法测量了4,4′ - 二氨基二苯醚（ODA）和均苯四甲酸二酐（PMDA）在含N,N - 二甲基甲酰胺（DMF）的超临界二氧化碳（scCO₂）中的溶解度，以积累新的实验数据，并阐明DMF对芳香族聚酰亚胺单体在scCO₂中溶解度的夹带剂效应。所有测量均在323 K和20.0 MPa下进行，DMF浓度从0到约20 mol%。在我们的实验条件下，ODA和PMDA的溶解度均随DMF浓度的增加而显著增加。例如，与它们在纯scCO₂中的溶解度相比，添加约10 mol%的DMF使ODA和PMDA的溶解度分别增加到54倍和115倍。实验结果采用Peng - Robinson状态方程（PR - EOS）进行关联和预测。利用Constantinou和Gani提出的基团贡献法估算了ODA和PMDA的临界温度和压力，并且……
The solubilities of 4,4′-diaminodiphenyl ether (ODA) and pyromellitic dianhydride (PMDA) in supercritical carbon dioxide (scCO2) with N,N-dimethylformamide (DMF) were measured by a semibatch flow method, to accumulate new experimental data and to clarify the entrainer effect of DMF on the solubilities of the monomers of aromatic polyimide in scCO2. All measurements were carried out at 323 K and 20.0 MPa with DMF concentrations from 0 to about 20 mol %. The solubilities of both ODA and PMDA increased dramatically with increasing DMF concentration under our experimental conditions. For example, the addition of about 10 mol % of DMF increased the solubilities of ODA and PMDA to 54- and 115-fold, respectively, as compared to their solubilities in pure scCO2. The experimental results were correlated and predicted by the Peng–Robinson equation of state (PR-EOS). The critical temperatures and pressures of ODA and PMDA were estimated utilizing the group contribution method proposed by Constantinou and Gani, and t...