Shape memory characteristics of thermadapt polyurethane incorporated with two structurally distinctive aliphatic isocyanates

Baek, Seung Hwan; Kim, Jung Hyeun

doi:10.1016/j.polymertesting.2021.107366

Cited by 8 publications

(5 citation statements)

References 31 publications

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“…To improve the mechanical and adaptive properties of TPU, a combination of differently structured diisocyanates [1] and chain extenders containing hydroxyl and amine groups can be used [119,120]. This allows the concentration of urethane and urea groups to be regulated, changing the composition of hard segments and thus controlling the rate of shape recovery of thermo-sensitive materials in a targeted approach.…”

Section: Structure Of Thermoplastic Polyurethanesmentioning

confidence: 99%

“…Segmented thermoplastic polyurethanes (TPUs) represent an important class of adaptive, or smart, shape memory materials (SMMs) [1][2][3][4]. Fundamentally, TPUs are physically crosslinked semi-crystalline block copolymers.…”

Section: Introductionmentioning

confidence: 99%

“…The hard segments provide the elasticity of the matrix that is required for shape recovery thanks to the presence of physical cross-links of hydrogen bonds. Improvement and modification of the adaptive properties of TPUs can be achieved either by changing the ratio of soft [10][11][12] and hard segments [1,13,14] or by introducing nanoscale fillers, such as silicon [2] or carbon nanoparticles [15][16][17]. In the last decade, researchers have been particularly attracted to nanoscale particles from natural sources to reinforce polymers or give them new functional properties.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nanocellulose-Based Thermoplastic Polyurethane Biocomposites with Shape Memory Effect

Gorbunova

Grunin²,

Morris

et al. 2023

J. Compos. Sci.

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In 2020, we published a review on the study of semi-crystalline thermoplastic polyurethane elastomers and composites based on the shape memory effect. The shape recovery ability of such polymers is determined by their sensitivity to temperature, moisture, and magnetic or electric fields, which in turn are dependent on the chemical properties and composition of the matrix and the nanofiller. Nanocellulose is a type of nanomaterial with high strength, high specific surface area and high surface energy. Additionally, it is nontoxic, biocompatible, environmentally friendly, and can be extracted from biomass resources. Thanks to these properties, nanocellulose can be used to enhance the mechanical properties of polymer matrices with shape memory effect and as a switching element of shape memory. This review discusses the methods for producing and properties of nanocellulose-based thermo-, moisture-, and pH-sensitive polyurethane composites. The synergistic effect of nanocellulose and carbon nanofillers and possible applications of nanocellulose-based thermoplastic polyurethane biocomposites with shape memory effect are discussed. A brief description of nanocellulose terminology is also given, along with the structure of shape memory thermoplastic polyurethanes. There is significant interest in such materials for three primary reasons: the possibility of creating a new generation of biomaterials, improving the environmental friendliness of existing materials, and exploiting the natural renewability of cellulose sources.

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Section: Structure Of Thermoplastic Polyurethanesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanocellulose-Based Thermoplastic Polyurethane Biocomposites with Shape Memory Effect

Gorbunova

Grunin²,

Morris

et al. 2023

J. Compos. Sci.

View full text Add to dashboard Cite

show abstract

“…Upon heating the material above the T g , the hard segments in the PU structure help to recover the material's permanent shape. The hard segments are responsible for 'remembering' the permanent shape and help drive recovery [114,115]. Tm is an essential parameter for processing SMPUs to achieve the desired permanent shape.…”

Section: Shape Memory Property Of Pumentioning

confidence: 99%

Updates on polyurethane and its multifunctional applications in biomedical engineering

Miri,

Farè,

et al. 2023

Prog. Biomed. Eng.

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Polyurethanes (PU) have properties that make them promising in biomedical applications. PU is recognized as one of the main families of blood and biocompatible materials. PU plays a vital role in the design of medical devices in various medical fields. The structure of PU contains two segments: soft and hard. Its elastomeric feature is due to its soft segment, and its excellent and high mechanical property is because of its hard segment. It is possible to achieve specific desirable and targeted properties by changing the soft and hard chemical structures and the ratio between them. The many properties of PU each draw the attention of different medical fields. This work reviews PU highlighted properties, such as biodegradability, biostability, shape memory, and improved antibacterial activity. Also, because PU has a variety of applications, this review restricts its focus to PU’s prominent applications in tissue engineering (TE), cardiovascular medicine, drug delivery, and wound healing. In addition, it contains a brief review of PU’s applications in biosensors and oral administration.

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“…[24][25][26] Polyurethane leading chains consist of soft and hard segments, which can be used to construct shape memory composites by adequately adjusting the proportion of soft and hard segments. [27][28][29] Shape memory polyurethane with multiple stimulus responses possesses potential application value in future smart devices. In recent years, electronic equipment has become increasingly popular, and electromagnetic radiation affects the regular operation of equipment and endangers human health.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Functional Polyurethane Chemistry: From Structural Design to Applications

et al. 2023

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Polyurethane has attracted the great attention of scientists because of its lightweight, high toughness, good wear resistance and corrosion resistance. In the past, polyurethane was mainly used in low‐end products because of its single function. With the development of science and technology, ordinary polyurethane has been unable to meet the diverse needs of people. In recent years, scientists have developed a lot of functional polyurethane: self‐healing polyurethane, antifouling polyurethane, antibacterial polyurethane, shape memory polyurethane and electromagnetic shielding polyurethane. Polyurethane with a single function has been reported by many people, while polyurethane with multiple functions has been rarely reported. This review comprehensively reviews the structural design and applications of functional polyurethane. In addition, the advantages and disadvantages of chemical grafting functional polyurethane are introduced emphatically. Finally, challenges and future research directions of functional polyurethane are also discussed.

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Shape memory characteristics of thermadapt polyurethane incorporated with two structurally distinctive aliphatic isocyanates

Cited by 8 publications

References 31 publications

Nanocellulose-Based Thermoplastic Polyurethane Biocomposites with Shape Memory Effect

Nanocellulose-Based Thermoplastic Polyurethane Biocomposites with Shape Memory Effect

Updates on polyurethane and its multifunctional applications in biomedical engineering

Recent Advances in Functional Polyurethane Chemistry: From Structural Design to Applications

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