Mechanically strong and stretchable polyurethane–urea supramolecular hydrogel using water as an additional in situ chain extender

Deng, Chao; Cui, Yulin; Zhao, Tingting; Tan, Mei; Huang, He; Guo, Mingyu

doi:10.1039/c4ra02597k

Cited by 28 publications

(43 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conventionally, physically crosslinked hydrogels are mechanically weak due to the lack of a strong intermolecular interaction force . Thus, developing high‐strength reversible supramolecular hydrogels is of both theoretical and practical significance . The above results demonstrate that PNAGA hydrogels were stably crosslinked by hydrogen bonded supramolecular interactions.…”

Section: Methodsmentioning

confidence: 80%

A Mechanically Strong, Highly Stable, Thermoplastic, and Self‐Healable Supramolecular Polymer Hydrogel

et al. 2015

View full text Add to dashboard Cite

Polymerization of glycinamide-conjugated monomer alone in concentrated aqueous solution enables facile formation of a mechanically strong and a highly stable supramolecular polymer (SP) hydrogel because of the cooperatively hydrogen-bonded crosslinking and strengthening effect from dual amide motifs. This SP hydrogel exhibits thermoplastic processability, injectability, and self-reparability because of the dynamic destruction and reconstruction of hydrogen bonds in response to temperature change.

show abstract

Section: Methodsmentioning

confidence: 80%

A Mechanically Strong, Highly Stable, Thermoplastic, and Self‐Healable Supramolecular Polymer Hydrogel

et al. 2015

View full text Add to dashboard Cite

show abstract

“…When mixed with water, it easily dispersed and thoroughly emulsified (Figure B), and then formed a self‐standing hydrogel in 2–10 min at room temperature (Figure C,D). Different from previous reports, the preparation of the PU prepolymer was finished in a one‐step reaction using two different low‐cost polyols, and hydrogel was quickly formed when the prepolymer was mixed with water. The simplicity and high efficiency made this route more suitable for large‐scale synthesis of such hydrogels and application in industrial and medical fields.…”

Section: Resultsmentioning

confidence: 99%

“…Significantly, the maximum water retaining capacity can be up to 40 times (by mass), which was equal to 97.6% water content. In the previous reports, the water content of these hydrogel was less than 70%. To the best of our knowledge, this is by far the highest water content in the PU hydrogels.…”

Section: Resultsmentioning

confidence: 99%

“…Gu and Mather reported a water‐triggered thermoplastic PU hydrogel with better mechanical strength, but the water content was only up to 65% and the elongation was 735% . In addition, most of the reported PU hydrogels were prepared by immersing the pre‐established hydrophilic PU crosslinked network into water to form the hydrogel . It generally takes a long time (1 h or longer),[22b] to reach the swelling equilibrium, and such a long time makes it not suitable for applications in industrial and medical fields, especially in the fields that require fast gelation.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, most of the reported PU hydrogels were prepared by immersing the pre‐established hydrophilic PU crosslinked network into water to form the hydrogel . It generally takes a long time (1 h or longer),[22b] to reach the swelling equilibrium, and such a long time makes it not suitable for applications in industrial and medical fields, especially in the fields that require fast gelation. As a consequence, efficient strategies for the synthesis of PU hydrogel with both excellent mechanical properties and high water content via a fast formation process are certainly a challenge.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

One‐Step Synthesis of Biodegradable Polyurethane Prepolymer and Its Rapid Gelation Behavior at High Water Content

Xue

Pei

et al. 2016

Macro Chemistry & Physics

View full text Add to dashboard Cite

In this study, a very simple, scalable, and low‐cost one‐step recipe is presented for preparing a biodegradable polyurethane prepolymer composed of isocyanate terminated linear polyethylene glycol and isocyanate terminated four‐armed polycaprolactone. Then, the corresponding hydrogels are easily formed by mixing the prepolymer with water in few minutes. The resulting hydrogel shows excellent mechanical properties with high tensile strength (up to 233.6 KPa) and recorded elongation rate (5000%), while maintaining high water content (up to 91% mass ratio). Meanwhile, the maximum water retaining capacity of the hydrogel can be up to 40 times of polyurethane prepolymer (in mass), which is equal to 97.6% water content. In addition, the degradation properties of the obtained hydrogel are studied in detail. This study demonstrates a facile approach to prepare the hydrogel with both excellent mechanical properties and high water content, which marks it as a potential candidate for applications in agrological field, such as sand fixing in desertification control.

show abstract

Thermoplastic polyurethane–urea elastomers with superior mechanical and thermal properties prepared from alicyclic diisocyanate and diamine

Wang

Huang

2020

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

High‐performance thermoplastic polyurethane (TPU) elastomers have long been the objective of numerous studies. In this work, thermoplastic polyurethane–urea (TPUU) elastomers with balanced superior mechanical and thermal properties, in comparison with the rare cases of high‐performance TPU/TPUU elastomers with super‐high tensile strength, were synthesized by the reaction of polycarbonate diols with excess alicyclic isophorone diisocyanate, followed by the chain extension of alicyclic isophorone diamine. When the content of hard segment was around 47%, the TPUU elastomer had super‐high tensile strength of 51.7 MPa, initial elastic modulus of 698 MPa and elongation at break of 480%. The temperature range of this TPUU elastomer's rubbery state was up to 120°C with storage modulus above 200 MPa, and its rubbery flow state reached 200°C where the storage modulus was still as high as 100 MPa. Fourier transform infrared spectroscopy analysis indicated the presence of strongly hydrogen bonded urethane and urea groups in these TPUU elastomers. Atomic force microscopy and differential scanning calorimetry studies demonstrated significant and nearly perfect microphase separation in these TPUU elastomers when the hard segment content was around or below 47%. These noncrystalline TPUU elastomers could be thermally processed or processed in the form of a solution.

show abstract

Mechanically strong and stretchable polyurethane–urea supramolecular hydrogel using water as an additional in situ chain extender

Abstract: Polyurethane–urea supramolecular hydrogel with excellent mechanical and processible properties is developed. The mechanical properties including shear modulus, elongation at break, tensile strength and compression stress can be adjusted by altering the diisocyanate content.

Cited by 28 publications

References 43 publications

A Mechanically Strong, Highly Stable, Thermoplastic, and Self‐Healable Supramolecular Polymer Hydrogel

A Mechanically Strong, Highly Stable, Thermoplastic, and Self‐Healable Supramolecular Polymer Hydrogel

One‐Step Synthesis of Biodegradable Polyurethane Prepolymer and Its Rapid Gelation Behavior at High Water Content

Thermoplastic polyurethane–urea elastomers with superior mechanical and thermal properties prepared from alicyclic diisocyanate and diamine

Contact Info

Product

Resources

About