Epoxy Vitrimer Materials by Lipase-Catalyzed Network Formation and Exchange Reactions

被引：14

作者：

Bakkali-Hassani, Camille ^{[1
]}

Edera, Paolo ^{[1
]}

Langenbach, Jakob ^{[1
]}

Poutrel, Quentin-Arthur ^{[1
]}

Norvez, Sophie ^{[1
]}

Gresil, Matthieu ^{[2
]}

Tournilhac, Francois ^{[1
]}

机构：

[1] PSL Univ, Mol Macromol Chem & Mat, ESPCI Paris, F-75005 Paris, France

[2] Monash Univ, Dept Mat Sci & Engn, Dept Mech & Aerosp Engn, i Composites Lab, Clayton 3800, Australia

来源：

ACS MACRO LETTERS | 2023年 / 12卷 / 03期

基金：

欧盟地平线“2020”;

关键词：

N-HETEROCYCLIC CARBENES; DIMETHYL TEREPHTHALATE; TERTIARY AMINE; CURRENT STATE; TRANSESTERIFICATION; COPOLYMERS; POLYESTER; SMART;

D O I：

10.1021/acsmacrolett.2c00715

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The preparation and reprocessing of an epoxy vitrimer material is performed in a fully biocatalyzed process wherein network formation and exchange reactions are promoted by a lipase enzyme. Binary phase diagrams are introduced to select suitable diacid/diepoxide monomer compositions overcoming the limitations (phase separation/sedimentation) imposed by curing temperature inferior than 100 degrees C, to protect the enzyme. The ability of lipase TL, embedded in the chemical network, to catalyze efficiently exchange reactions (transesterification) is demonstrated by combining multiple stress relaxation experiments at 70-100 degrees C and complete recovery of mechanical strength after several reprocessing assays (up to 3 times). Complete stress relaxation ability disappears after heating at 150 degrees C, due to enzyme denaturation. Transesterification vitrimers thus designed are complementary to those involving classical catalysis (e.g., using the organocatalyst triazabicyclodecene) for which complete stress relaxation is possible only at high temperature.

引用

页码：338 / 343

页数：6

共 44 条

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Albertsson AC, 2002, ADV POLYM SCI, V157, P1

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