Photoswitchable nanocomposites made from coumarin-functionalized cellulose nanocrystals

Literature Information

Publication Date 2014-06-04
DOI 10.1039/C4PY00486H
Impact Factor 5.582
Authors

Mahesh V. Biyani, Christoph Weder, E. Johan Foster


View Original

Abstract

Coumarin derivatives can undergo dimerization reactions upon exposure to ultraviolet (UV) light with a wavelength of >300 nm. We exploited this effect to develop mechanically adaptive nanocomposites in which UV light can be used to change the material properties. Thus, cellulose nanocrystals (CNCs) derived from tunicates were functionalized with 7-coumaryl-(6-isocyanatohexyl) carbamate to afford coumarin-derivatized CNCs (Cou-CNCs). Light-responsive nanocomposites were prepared by reinforcing a rubbery ethylene oxide–epichlorohydrin copolymer (EO–EPI) matrix with Cou-CNCs. The as-prepared nanocomposites show a significantly increased tensile storage modulus (E′) in comparison to the neat EO–EPI. For example, E′ at 25 °C increased from 4 MPa to 199 MPa upon introduction of 10% w/w Cou-CNCs. E′ increased further to 291 MPa upon irradiation with 365 nm UV light, whereas control nanocomposites with neat CNCs did not display any significant increase in E′ under the same conditions. The optically induced reaction between Cou-CNCs also reduced the swelling of the EO–EPI/Cou-CNC nanocomposites upon exposure to water as well as the extent of water-induced softening.

Related Literature

Syngas conversion to biofuels and biochemicals: a review of process engineering and mechanisms

Sundus Javed

2023-11-27 Review Article

DOI: 10.1039/D3SE00916E

Study of a proton exchange membrane fuel cell and metal hydride system based on double spiral structure coupling

Xiao Wang, Jin-Xin Wang, Hao Zhang, Shi-Yu Li

2023-12-05 Paper

DOI: 10.1039/D3SE01388J

Quantum phase transitions in skewed ladder systems

Sambunath Das, Dayasindhu Dey, Rajamani Raghunathan, Zoltan G. Soos, Manoranjan Kumar, S. Ramasesha

2023-12-09 Review Article

DOI: 10.1039/D3CP04179D

Tailoring flavin-based photosensitizers for efficient photooxidative coupling of benzylic amines

Huimin Guo, Yang Qiu, Siyu Liu, Xiangyu Zhang, Jianzhang Zhao

2023-11-21 Paper

DOI: 10.1039/D3CP04579J

Site planning and selection of hydrogen refueling stations considering the life cycle and demand uncertainty

Xunpeng Qin, Cenglin Yao, Mao Ni, Jun Zhou, Ling Liu, Wenyi Li, Wenlong Yang

2023-10-20 Paper

DOI: 10.1039/D3SE00897E

You might also like

Compound Q&A

What is Ethyl 3-cyclohexylpropanoate (CAS: 10094-36-7)?

Ethyl 3-cyclohexylpropanoate is a clear, colorless to light yellow liquid with a...

10094-36-7Ethyl 3-cyclohexylpr...
Compound Q&A

How should waste containing 2-(Hydroxymethyl)-5-(methoxycarbonyl)-6-methyl-4-(2-nitrophenyl)nicotinic acid (CAS: 34783-31-8) be handled?

Waste containing 2-(Hydroxymethyl)-5-(methoxycarbonyl)-6-methyl-4-(2-nitrophenyl...

34783-31-82-(Hydroxymethyl)-5-...
Compound Q&A

How should waste containing 2,4,6-Tris(pentafluoroethyl)-1,3,5-triazine (CAS: 858-46-8) be handled?

Waste containing 2,4,6-Tris(pentafluoroethyl)-1,3,5-triazine (CAS: 858-46-8) sho...

858-46-82,4,6-Tris(pentafluo...
Compound Q&A

What precautions should be taken when handling Chloroac-nle-oh (CAS: 56787-36-1)?

When handling Chloroac-nle-oh (CAS: 56787-36-1), it is essential to wear appropr...

56787-36-1Chloroac-nle-oh
Compound Q&A

What industries use Ethyl 6-phenylimidazo[2,1-b][1,3]thiazole-3-carboxylate (CAS: 752244-05-6)?

Ethyl 6-phenylimidazo[2,1-b][1,3]thiazole-3-carboxylate is primarily used in the...

752244-05-6Ethyl 6-phenylimidaz...
Compound Q&A

Are there alternatives to alpha-(2-Bromophenyl)benzylamine (CAS: 55095-15-3) in synthesis?

Alternatives to alpha-(2-Bromophenyl)benzylamine (CAS: 55095-15-3) in synthesis ...

55095-15-3alpha-(2-Bromophenyl...
Compound Q&A

How should waste containing 2-Chloro-5-methoxypyridine (CAS: 139585-48-1) be handled?

Waste containing 2-Chloro-5-methoxypyridine (CAS: 139585-48-1) should be managed...

139585-48-12-Chloro-5-methoxypy...
Compound Q&A

What industries use 1-(4-Methoxyphenyl)-2,5-dimethyl-1H-pyrrole (CAS: 5044-27-9)?

1-(4-Methoxyphenyl)-2,5-dimethyl-1H-pyrrole (CAS: 5044-27-9) is used in various ...

5044-27-91-(4-Methoxyphenyl)-...
Compound Q&A

Are there alternatives to 3-Bromo-5-(N-Boc)aminomethylisoxazole (CAS: 903131-45-3) in synthesis?

There are alternative reagents and compounds that can be used in the synthesis o...

903131-45-33-Bromo-5-(N-Boc)ami...
Compound Q&A

What is Tungsten(IV) oxide (CAS: 12036-22-5)?

Tungsten(IV) oxide, also known as tungsten dioxide, is a chemical compound with ...

12036-22-5Tungsten(IV) oxide

Source Journal

Polymer Chemistry

Polymer Chemistry
CiteScore: 8.6
Self-citation Rate: 7.3%
Articles per Year: 457

Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.

Recommended Compounds

Recommended Suppliers

Disclaimer
This page provides academic journal information for reference and research purposes only. We are not affiliated with any journal publishers and do not handle publication submissions. For publication-related inquiries, please contact the respective journal publishers directly.
If you notice any inaccuracies in the information displayed, please contact us at support@chemtradehub.com. We will promptly review and address your concerns.