Assembly behavior of double thermo-responsive block copolymers with controlled response temperature in aqueous solution

作者：Kotsuchibashi Youhei; Yamamoto Kazuya; Aoyagi Takao^*

来源：Journal of Colloid and Interface Science, 2009, 336(1): 67-72.

DOI：10.1016/j.jcis.2009.03.093

• Thermo-responsive polymers
• Amphiphilic polymer
• Block copolymer
• N-Isopropylacrylamide
• N-(Hydroxymethyl)acrylamide
• Living radical polymerization
• Atom transfer radical polymerization
• Assembly
• Aggregation
• Good point

We reported the synthesis of double thermo-responsive block copolymers comprised of a poly(N-isopropylacrylamide (NIPAAm)) block and a poly(NIPAAm-co-N-(hydroxymethyl)acrylamide (HMAAm)) block, which was synthesized using an atom transfer radical polymerization (ATRP) technique. The cloud point of the poly(NIPAAm-co-HMAAm) (NH) block could be easily controlled by altering the HMAAm content. Below the cloud point of polyNIPAAm (N) block, the block copolymers were completely dissolved. Between the cloud points of each block, the block copolymer formed the aggregate structure that Could be constructed with the hydrated NH shell and the dehydrated N core. Moreover with increases in temperature, the diameter decreased due to the dehydration of the NH block shell. The response was completely reversible by changes in temperature, as confirmed by (1)H NMR, turbidity, and FE-SEM measurements.

• 出版日期2009-8-1