Preparation of Various Nanomaterials via Controlled Gelation of a Hydrophilic Polymer Bearing Metal-Coordination Units with Metal Ions.
Preparation of Various Nanomaterials via Controlled Gelation of a Hydrophilic Polymer Bearing Metal-Coordination Units with Metal Ions.
复制标题
含金属配位单元的亲水性聚合物与金属离子的可控接枝制备各种纳米材料。
DOI：
10.3390/gels8070435
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发表时间：
2022-07-11
期刊：
影响因子：
4.6
通讯作者：
Yamanobe, Takeshi
中科院分区：
文献类型：
--
作者：
Nagai, Daisuke;Isobe, Naoki;Inoue, Tatsushi;Okamoto, Shusuke;Maki, Yasuyuki;Yamanobe, Takeshi
我们研究了一种具有金属配位单元（HPMC）和金属离子（PdII或AuIII）的亲水性聚合物的凝胶反应。胶凝是通过在n -甲基-2-吡咯烷酮（NMP）中加入HPMC溶液到金属离子水溶液中进行的。当金属配位单元的组成比从10 mol%增加到34 mol% （HPMC-34）时，与AuIII的交联速率增加。将HPMC-34溶液滴入AuIII溶液后，立即发生交联，使HPMC-34与AuIII相分离。AuIII的交联从HPMC-34液滴的表面到内部进行，形成球形凝胶。相反，金属配位单元的比例从10 mol%降低到4 mol% （HPMC-4）降低了PdII交联速率。交联逐渐发生，凝胶延伸至血管底部，形成纤维状凝胶。根据不同形态凝胶的形成机理，HPMC-34和AuIII凝胶通过在AuIII溶液和HPMC-34溶液之间的界面凝胶化提供了纳米片。HPMC-4和PdII凝胶化的方法很简单，即在PdII溶液中滴入HPMC-4溶液。这些结果表明，改变HPMC中金属配位单元的组成比例可以控制凝胶行为，从而产生不同类型的纳米材料。
We investigated the gelation of a hydrophilic polymer with metal-coordination units (HPMC) and metal ions (PdII or AuIII). Gelation proceeded by addition of an HPMC solution in N-methyl-2-pyrrolidone (NMP) to a metal ion aqueous solution. An increase in the composition ratio of the metal-coordination units from 10 mol% to 34 mol% (HPMC-34) increased the cross-linking rate with AuIII. Cross-linking immediately occurred after dropwise addition of an HPMC-34 solution to the AuIII solution, generating the separation between the phases of HPMC-34 and AuIII. The cross-linking of AuIII proceeded from the surface to the inside of the HPMC-34 droplets, affording spherical gels. In contrast, a decrease in the ratio of metal-coordination units from 10 mol% to 4 mol% (HPMC-4) decreased the PdII cross-linking rate. The cross-linking occurred gradually and the gels extended to the bottom of the vessel, forming fibrous gels. On the basis of the mechanism for the formation of gels with different morphologies, the gelation of HPMC-34 and AuIII provided nanosheets via gelation at the interface between the AuIII solution and the HPMC-34 solution. The gelation of HPMC-4 and PdII afforded nanofibers by a facile method, i.e., dropwise addition of the HPMC-4 solution to the PdII solution. These results demonstrated that changing the composition ratio of the metal-coordination units in HPMC can control the gelation behavior, resulting in different types of nanomaterials.
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DOI：
10.3390/gels8010054
发表时间：
2022-01-12
期刊：
Gels (Basel, Switzerland)
影响因子：
--
作者：
Riva L;Lotito AD;Punta C;Sacchetti A
通讯作者：
Sacchetti A
光功能的自下而上双Bis（Dipyrrinato）锌（II）复合纳米片。
影响因子：
16.6
作者：
Sakamoto, Ryota;Hoshiko, Ken;Liu, Qian;Yagi, Toshiki;Nagayama, Tatsuhiro;Kusaka, Shinpei;Tsuchiya, Mizuho;Kitagawa, Yasutaka;Wong, Wai-Yeung;Nishihara, Hiroshi
通讯作者：
Nishihara, Hiroshi
影响因子：
3
作者：
Wang, Yongzhi;Li, Yaoxian;Yang, Qingbiao
通讯作者：
Yang, Qingbiao
影响因子：
4.1
作者：
Nagai, Daisuke;Morita, Moeko;Yamanobe, Takeshi
通讯作者：
Yamanobe, Takeshi
影响因子：
9.5
作者：
Pena, Brisa;Maldonado, Marcos;Mestroni, Luisa
通讯作者：
Mestroni, Luisa