Green Synthesis of Waterborne Polyurethane for High Damping Capacity

Zhang, Wenhai; Ma, Fangxing; Meng, Zhaohui; Kong, Lingqing; Dai, Ziyang; Zhao, Guangxing; Zhu, Ai‐Min; Liu, Xiangyang; Lin, Naibo

doi:10.1002/macp.202000457

Cited by 12 publications

(9 citation statements)

References 54 publications

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“…This is because of the blistering formed during the compression process, which perturbed the uniformity of the films. However, most importantly, this result is highly acceptable for the development of sustainable smart materials. − …”

Section: Results and Discussionmentioning

confidence: 99%

Robust Self-Healable and Three-Dimensional Printable Thermoplastic Elastomeric Waterborne Polyurethane for Artificial Muscle and Biomedical Scaffold Applications

Morang,

Bandyopadhyay,

Rajput

et al. 2023

ACS Appl. Polym. Mater.

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Waterborne polyurethanes (WPUs) with smart attributes like self-healing and shape-memory, reprocessability, and excellent integrated mechanical properties are the key connotations for advanced applications. Congenitally, these properties are associated with conflicting features, which makes it puzzling to optimize these paradoxical properties in a single material. Herein, this study introduces an easy but impactful strategy to answer this dilemma, which is based on the triple synergistic effect of 'dynamic hard domains (2-aminophenyl disulfide, 2-APDS)', 'asymmetric IPDI-IPDA (isophorone diisocyanate-isophorone diamine) architecture', and 'shape memory effect (SME)'. The loosely packed IPDI-IPDA moieties and the SME promote the reversible S−S metathesis reactions, resulting in high healing efficiency as well as mechanical strength, simultaneously. Based on this tactic, a series of robust self-healable WPUs (SHWPUs) was synthesized with good healing efficiency (70.22−79.94%), shape recovery (88.4−97.4%), excellent mechanical strength (16.09−26.23 MPa), high elongation at break (1604−2071%), outstanding toughness (188.3−216.6 MJ m −3 ), high fracture energy (46.74−66.33 kJ m −2 ), biocompatibility, and biodegradability. Outstandingly, a SHWPU film could lift a dumbbell of 25 kg, which is 53,648 times heavier than its own weight without any crack. Taking advantage of good shape recoverability, the elastomer was tested for "artificial muscle" contraction. Impressively, the SHWPU-1 film could vertically and successfully lift a 100 g load, which is 251.19 times heavier than its weight under ambient conditions. Moreover, a series of 3D printable gelatin/SHWPU-2 inks were prepared, which possess the potential for bone scaffolds. Additionally, this thermoplastic SHWPU could be reprocessed at 80 °C under 60−80 kg cm −2 pressure. Thus, the SHWPU elastomer exhibited all characteristics of advanced materials with smart attributes and eco-friendly nature.

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Section: Results and Discussionmentioning

confidence: 99%

Robust Self-Healable and Three-Dimensional Printable Thermoplastic Elastomeric Waterborne Polyurethane for Artificial Muscle and Biomedical Scaffold Applications

Morang,

Bandyopadhyay,

Rajput

et al. 2023

ACS Appl. Polym. Mater.

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“…These microdomains can act as rigid fillers, affecting the mechanical properties of the material and resulting in tensile strength, consistent with the results discussed above. 25 Figure 7 is the AFM phase diagram of A-B1 $ A-B4. It can be seen from the Figure 7a-d that the bright areas gradually increase, indicating that the hard segment micro-domains as the dispersed phase gradually increase.…”

Section: Micromorphologymentioning

confidence: 99%

“…The reason for the analysis is that the hard segment needs to overcome more internal frictional resistance when the chain segment moves, thus consuming more mechanical action, so the hard segment can contribute more damping characteristics in the gradient structure. 25 The more prominent advantage of the gradient structure is reflected in the broadening of the damping temperature range of the material. In Figure 9, the TR of component A is 40.7 C (À32.3 $ 8.4 C), all of which are lower than room temperature.…”

Section: Effect Of Gradient Structure On Damping and Dynamic Mechanic...mentioning

confidence: 99%

The facile and effective approach for fabricating polyurethane gradient materials with significant damping properties

Wang,

Zhu,

Wang

et al. 2023

J of Applied Polymer Sci

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Polyurethane is the main matrix material of polymer damping materials, but the damping temperature range is narrow, the effective damping temperature range does not match the working temperature of the material, and the elastic modulus is sensitive to temperature during glass transition, which is not conducive to safe use in a wide temperature range. In this paper, the polyurethane gradient material with the hard segment content continuously changing along the length direction was designed and prepared by the reaction injection method. Dynamic mechanical analysis (DMA) shows that the gradient structure greatly influences the comprehensive damping performance of polyurethane. While maintaining no significant decrease in mechanical properties, the gradient material extends the effective damping temperature range (TR) from 40.7°C (−32.3 ~ 8.4°C) for component A and 66.6°C (59.5 ~ 126.1°C) for component B to 139.5°C (−20.6 ~ 118.9°C). At the same time, the damping peak remains high (0.48), which is close to the higher damping peak of the B component of 0.56. The elastic modulus (E′) decreases slowly with the increase in temperature, which can better ensure the safety of the material.

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“…Additionally, we assessed the energy dissipation and damping capacity of the nanogel fibers with varying twist densities at 20% prestrain (Figure 5d). The fibers can achieve 311 MJ m −3 of energy dissipation and 91% of damping capacity, which are superior to spider silk and most of the existing synthetic energy-dissipation materials [7,[45][46][47][48][49][50][51] such as hydrogels (≈14 MJ m −3 , ≈92.8%), [46] polyurethane (6.7 MJ m −3 , 95.6%), [49] supramolecular fibers (0.8 MJ m −3 , 76%), [48] and CNT foams (2.4 MJ m −3 , 80%) [52] (Figure 1d).…”

Section: Improving the Nanogel Fiber Mechanical Properties Through Pr...mentioning

confidence: 99%

A Protein‐Like Nanogel for Spinning Hierarchically Structured Artificial Spider Silk

Qian

Wang

et al. 2022

Advanced Materials

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using a delicate draw-spinning process such as that of spider silk is challenging. Crosslinking is one of the indispensable structural characteristics contributing to the strength and toughness of fibers. This is because the molecular chains are locked in the crosslinking network, [12] however, making it nonspinnable.Efforts have been made to spin a fiber from a linear polymer or a soluble precursor followed by an additional crosslinking step. [6,7,13] Moreover, novel spinning methods, such as wet spinning, [14,15] dry spinning, [16,17] micro fluidic spinning, [18][19][20] electro-spinning, [21,22] templating, [23] and dynamic crosslinked spinning, [24] have been developed. However, this increases the complexity of the spinning process, and controlling the hierarchical structure of the fiber becomes difficult. Consequently, so far the combination of strength and toughness of the artificial fibers still have a big gap to reach those of the spider dragline silk.The β-sheets in spidroin serve as crosslinking points, and the crosslinking network is localized inside this nanometersized globular protein. Therefore, spidroin is soluble and can be directly draw-spun to produce a hierarchical fiber via selfassembly (Figure 1a). Inspired by the spidroin structure and the spinning process, herein we prepared a soluble nanogel with an internal crosslinked network, which can be drawn-spun to form hierarchical fibers with nanoassemblies (Figure 1b). Theoretical modeling provided understanding of the fiber's spinning capacity as a function of the nanogel size. The introduction of Spider dragline silk is draw-spun from soluble, β-sheet-crosslinked spidroin in aqueous solution. This spider silk has an excellent combination of strength and toughness, which originates from the hierarchical structure containing β-sheet crosslinking points, spiral nanoassemblies, a rigid sheath, and a soft core. Inspired by the spidroin structure and spider spinning process, a soluble and crosslinked nanogel is prepared and crosslinked fibers are drew spun with spider-silk-like hierarchical structures containing cross-links, aligned nanoassemblies, and sheath-core structures. Introducing nucleation seeds in the nanogel solution, and applying prestretch and a spiral architecture in the nanogel fiber, further tunes the alignment and assembly of the polymer chains, and enhances the breaking strength (1.27 GPa) and toughness (383 MJ m −3 ) to approach those of the best dragline silk. Theoretical modeling provides understanding for the dependence of the fiber's spinning capacity on the nanogel size. This work provides a new strategy for the direct spinning of tough fiber materials.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202201843.

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Green Synthesis of Waterborne Polyurethane for High Damping Capacity

Cited by 12 publications

References 54 publications

Robust Self-Healable and Three-Dimensional Printable Thermoplastic Elastomeric Waterborne Polyurethane for Artificial Muscle and Biomedical Scaffold Applications

Robust Self-Healable and Three-Dimensional Printable Thermoplastic Elastomeric Waterborne Polyurethane for Artificial Muscle and Biomedical Scaffold Applications

The facile and effective approach for fabricating polyurethane gradient materials with significant damping properties

A Protein‐Like Nanogel for Spinning Hierarchically Structured Artificial Spider Silk

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