FACILE PREPARATION OF NANOPARTICLES BY INTRAMOLECULAR CROSSLINKING OF ISOCYANATE FUNCTIONALIZED COPOLYMERS.
FACILE PREPARATION OF NANOPARTICLES BY INTRAMOLECULAR CROSSLINKING OF ISOCYANATE FUNCTIONALIZED COPOLYMERS.
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DOI：
10.1021/ma900899v
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发表时间：
2009-06-09
期刊：
影响因子：
5.5
通讯作者：
Hawker CJ
中科院分区：
文献类型：
--
作者：
Beck JB;Killops KL;Kang T;Sivanandan K;Bayles A;Mackay ME;Wooley KL;Hawker CJ
一种在温和的室温条件下制备分子内塌陷纳米颗粒的新合成方法已经由市售乙烯基单体开发出来。异氰酸酯官能化线性共聚物与二胺在稀溶液中的反应导致纳米颗粒的有效形成，其中纳米颗粒的直径可以通过控制异氰酸酯重复单元的分子量和摩尔百分比来改变。分子内塌陷纳米粒子的物理性质与三维结构完全一致，塌陷反应分析表明，沿着主链的约 75% 的异氰酸酯基团发生了交联，其中 25% 可用于与单官能胺进一步反应。异氰酸酯的逐步消耗使得纳米颗粒的化学和物理性质得以进一步调整，并显着拓宽了可以使用这种温和且高效的化学方法制备的纳米颗粒的范围。
A new synthetic approach to the preparation of intramolecularly collapsed nanoparticles under mild, room temperature conditions has been developed from commercially available vinyl monomers. Reaction of isocyanate functionalized linear copolymers with a diamine in dilute solution leads to the efficient formation of nanoparticles where the diameter of the nanoparticle can be varied by controlling both the molecular weight and mole percentage of isocyanate repeat units. Physical properties for the intramolecularly collapsed nanoparticles were fully consistent with a three-dimensional structure and analysis of the collapse reaction revealed that approximately 75% of the isocyanate groups along the backbone underwent crosslinking with 25% being available for further reaction with mono-functional amines. This stepwise consumption of the isocyanates allows the chemical and physical properties of the nanoparticles to be further tuned and significantly opens up the range of nanoparticles that can be prepared using this mild and highly efficient chemistry.
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影响因子：
17.1
作者：
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通讯作者：
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15
作者：
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