| SiO_2接枝聚酰胺胺树枝状大分子在PS超临界CO_2发泡中的作用研究 |
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| 引用本文： | 周云国,周科瑜,周蜜,陈枫,杨晋涛,钟明强.SiO_2接枝聚酰胺胺树枝状大分子在PS超临界CO_2发泡中的作用研究[J].科技通报,2011,27(6). |
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| 作者姓名： | 周云国 周科瑜 周蜜 陈枫 杨晋涛 钟明强 |
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| 作者单位： | 浙江工业大学化学工程与材料学院,杭州,310014 |
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| 基金项目： | 国家自然科学基金(NO.50903070); 浙江省自然科学基金(NO.Y4090363和Y4090502); 浙江省新苗人才计划(2009R403006) |
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| 摘 要： | 在纳米SiO2表面引入聚酰胺胺树枝状大分子(PAMAM),再通过原子转移自由基聚合(A-TRP)合成了一种核-壳结构的SiO2-PAMAM-PS,将改性的纳米SiO2添加到PS基体中作为超临界CO2发泡的成核剂。红外光谱(IR)、差示扫描量热仪(DSC)、热重(TG)等结果表明,SiO2表面成功引入了PAMAM,并且接枝上了PS链段。透射电镜(TEM)显示该成核剂具有核-壳结构及其在PS基体中可以较均匀分散。将添加了改性SiO2的PS进行了超临界CO2发泡,利用扫描电镜(SEM)对泡孔结构进行了表征,结果表明:相比于纯发泡PS,成核剂的加入,改善了PS的泡孔结构,使泡孔尺寸显著减小,泡孔密度明显增加。
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| 关 键 词： | 聚酰胺胺树枝状大分子 纳米SiO2 成核剂 超临界CO2发泡 聚苯乙烯 |
Preparation of SiO_2 Grafted with Polyamidoamine Dendrimer and Its Effect on Polystyrene Supercritical CO_2 Foaming |
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| ZHOU Yunguo,ZHOU Keyu,ZHOU Mi,CHEN Feng,YA NG Jintao,ZHONG Mingqiang.Preparation of SiO_2 Grafted with Polyamidoamine Dendrimer and Its Effect on Polystyrene Supercritical CO_2 Foaming[J].Bulletin of Science and Technology,2011,27(6). |
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| Authors: | ZHOU Yunguo ZHOU Keyu ZHOU Mi CHEN Feng YA NG Jintao ZHONG Mingqiang |
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| Institution: | ZHOU Yunguo,ZHOU Keyu,ZHOU Mi,CHEN Feng,YANG Jintao,ZHONG Mingqiang*(College of Chemical Engineering and Materials,Zhejiang University of Technology,Hangzhou 310014,China) |
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| Abstract: | The surface of nano SiO2 particles was grafted with polyamidoamine dendrimer(PAMAM).And a core-shell SiO2-PAMAM grafted polystyrene(PS) composite was synthesized by the atom transfer radical polymerization(ATRP) method,which was used as a nucleating agent in PS matrix for supercritical CO2 foaming.The result of infrared spectroscopy(IR),differential scanning calorimetry(DSC),thermogravimetry(TG)showed that PAMAM and PS chain were successfully grafted on the surface of SiO2.The core-shell structure and well ... |
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| Keywords: | polyamidoamine dendrimer nano SiO2 nucleating agent supercritical CO2 foaming polystyrene |
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