Electron-beam derived polymeric cryogels
Electron-beam derived polymeric cryogels
复制标题
电子束衍生的聚合物冷冻凝胶
DOI：
10.1039/c2sm27517a
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发表时间：
2013
期刊：
影响因子：
3.4
通讯作者：
R. Konieczny
中科院分区：
文献类型：
--
作者：
S. Reichelt;C. Abe;S. Hainich;W. Knolle;U. Decker;A. Prager;R. Konieczny
在这项研究中，我们发表了一种新的尝试，大孔，聚合物冻凝胶（MPCs）的电子束（EB）引发的自由基交联聚合（甲基）丙烯酸酯在冷冻水介质中。EB-工艺是一种环境友好的快速工艺（辐射和反应时间约10-20分钟），其允许含双键的单体的无引发剂聚合。通过溶胀实验、SEM、详细的XPS研究、DMA、压汞孔隙率和ESEM对MPC进行了全面表征。利用ESR实验研究了反应过程。研究了辐照剂量、辐照时间、冷冻条件、化学组成和（甲基）丙烯酸酯浓度等反应参数对聚合物性能的影响。在毛细管或直径达25 mm的管中原位合成MPCs。MPCs的孔结构主要由冷冻温度和大分子单体/交联剂浓度控制，并且由10-70 μm范围内的大的互连孔组成。交联剂浓度直接影响材料的刚度和Tg。用聚烯丙胺盐酸盐成功地修饰了MPC。这种简单的方法提供了一个工具箱，从各种不饱和物质的合成歧管MPC的大量和规模。
In this study we publish a novel attempt to macroporous, polymeric cryogels (MPCs) by electron-beam (EB) initiated free radical crosslinking polymerization of (meth)acrylates in frozen aqueous media. The EB-process is an environmentally benign fast process (radiation and reaction time about 10–20 min) which allows the initiator-free polymerization of double-bond containing monomers. The MPCs were thoroughly characterized by swelling experiments, SEM, detailed XPS studies, DMA, Hg intrusion porosity and ESEM. The processes during the reaction were studied using ESR experiments. The influences of the reaction parameters like dose, radiation time, freezing conditions, chemical composition and (meth)acrylate concentration on the properties of the MPCs were investigated. The MPCs were synthesized in situ in capillaries or in tubes up to a diameter of 25 mm. The porous structure of the MPCs is mainly controlled by the freezing temperature and the macromonomer/crosslinker concentration and consists of large interconnected pores in the range of 10–70 μm. The crosslinker concentration directly affects the stiffness and the Tg of the materials. The MPCs were successfully modified with poly(allylamine hydrochloride). This straightforward method provides a toolbox for the synthesis of manifold MPCs from various unsaturated substances in large quantities and scale.
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影响因子：
4.6
作者：
B. Kostova;D. Momekova;P. Petrov;G. Momekov;Natalia Toncheva-Moncheva;C. Tsvetanov;N. Lambov
通讯作者：
B. Kostova;D. Momekova;P. Petrov;G. Momekov;Natalia Toncheva-Moncheva;C. Tsvetanov;N. Lambov
通过反相微乳液自由基聚合将聚丙烯酸叔丁酯接枝到聚烯丙胺：从梳形聚合物到两亲壳交联聚合物纳米胶囊
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
D. Sarkar;Jouliana M. El Khoury;S. Lopina;Jun Hu
通讯作者：
Jun Hu
影响因子：
3.9
作者：
Kessel, Stefanie;Schmidt, Stephan;Fery, Andreas
通讯作者：
Fery, Andreas
影响因子：
4.6
作者：
Agnes Schulze;Barbara Marquardt;S. Kaczmarek;R. Schubert;A. Prager;M. Buchmeiser
通讯作者：
M. Buchmeiser
影响因子：
3.4
作者：
Plieva, FM;Karlsson, M;Galaev', IY
通讯作者：
Galaev', IY