Kinetic trapping of 3D-printable cyclodextrin-based poly(pseudo)rotaxane networks

被引：44

作者：

Lin, Qianming ^{[1
]}

Li, Longyu ^{[1
]}

Tang, Miao ^{[1
]}

Uenuma, Shuntaro ^{[2
]}

Samanta, Jayanta ^{[1
]}

Li, Shangda ^{[1
]}

Jiang, Xuanfeng ^{[3
]}

Zou, Lingyi ^{[1
]}

Ito, Kohzo ^{[2
]}

Ke, Chenfeng ^{[1
]}

机构：

[1] Dartmouth Coll, Dept Chem, Hanover, NH 03755 USA

[2] Univ Tokyo, Dept Adv Mat Sci, 5-1-5 Kashiwanoba, Chiba, Chiba 2778561, Japan

[3] Hubei Univ, Sch Mat & Engn, Key Lab Green Preparat & Applicat Funct Mat, Minist Educ, Wuhan 430062, Peoples R China

来源：

CHEM | 2021年 / 7卷 / 09期

关键词：

ALPHA-CYCLODEXTRIN; INCLUSION COMPLEXES; DRIVEN; GLYCOL;

D O I：

10.1016/j.chempr.2021.06.004

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Synthetically trapping kinetically varied (super)structures of molecular assemblies and amplifying them to the macroscale is a promising, yet challenging, approach for the advancement of meta-stable materials. Here, we demonstrated a concerted kinetic trapping design to timely resolve a set of transient polypseudorotaxanes in solution and harness a crop of them via micro-crystallization. By installing stopper or speed bump moieties on the polymer axles, meta-stable polypseudorotaxanes with segmented cyclodextrin blocks were hierarchically amplified into crystalline networks of different crosslinking densities at mesoscale and viscoelastic hydrogels with 3D-printability in bulk. We demonstrated simultaneous 3D-printing of two polypseudorotaxane networks from one reactive ensemble and their conversion to heterogeneous polyrotaxane monoliths. Spatially programming the macroscale shapes of these heterogeneous polyrotaxanes enabled the construction of moisture-responsive actuators, in which the shape morphing originated from the different numbers of cyclodextrins interlocked in these polyrotaxane networks.

引用

页码：2442 / 2459

页数：18

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