Production of thermal and water responsive shape memory polyurethane nanocomposite filaments with cellulose nanowhisker incorporation

Memiş, Nazife Korkmaz; Kaplan, Sibel

doi:10.1007/s10570-021-03966-9

Cited by 14 publications

(11 citation statements)

References 84 publications

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“…These unique properties, demonstrated at various temperatures, allow the PU-SMP to be used for various new functional applications [ 14 , 27 , 28 ] in various fields, including aviation and aerospace industries [ 14 , 29 , 30 , 31 , 32 ], robotics, sensors, and actuators [ 33 , 34 , 35 ], biomedical devices such as self-expandable vascular stents [ 36 ], smart textiles used in intelligent sport clothes and underwear, smart pillows, mattresses, and sport shoe insoles [ 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Polyurethane Shape Memory Polymer and Determination of Shape Fixity and Shape Recovery in Subsequent Thermomechanical Cycles

et al. 2022

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Multifunctional polyurethane shape memory polymers (PU-SMPs) have been of increasing interest in various applications. Here we report structure characterization, detailed methodology, and obtained results on the identification of functional properties of a thermoset PU-SMP (MP4510) with glass transition temperature of 45 °C. The stable, chemically crosslinked network of this thermoset PU-SMP results in excellent shape memory behavior. Moreover, the proximity of the activation temperature range of this smart polymer to room and body temperature enables the PU-SMP to be used in more critical industrial applications, namely fast-response actuators. The thermomechanical behavior of a shape memory polymer determines the engineering applications of the material. Therefore, investigation of the shape memory behavior of this class of commercial PU-SMP is of particular importance. The conducted structural characterization confirms its shape memory properties. The shape fixity and shape recovery properties were determined by a modified experimental approach, considering the polymer’s sensitivity to external conditions, i.e., the temperature and humidity variations. Three thermomechanical cycles were considered and the methodology used is described in detail. The obtained shape fixity ratio of the PU-SMP was approximately 98% and did not change significantly in the subsequent cycles of the thermomechanical loading due to the stability of chemical crosslinks in the thermoset materials structure. The shape recovery was found to be approximately 90% in the first cycle and reached a value higher than 99% in the third cycle. The results confirm the effect of the thermomechanical training on the improvement of the PU-SMP shape recovery after the first thermomechanical cycle as well as the effect of thermoset material stability on the repeatability of the shape memory parameters quantities.

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Section: Introductionmentioning

confidence: 99%

Characterization of Polyurethane Shape Memory Polymer and Determination of Shape Fixity and Shape Recovery in Subsequent Thermomechanical Cycles

et al. 2022

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“…Examples of thermally sensitive TPU composites based on CNCs with hydrophilic properties and the prospect of using such composites to create smart fabrics with a double response to both environmental temperature and humidity are particularly promising for practical applications [22,196]. Treatment of woolen fabrics with a nanocellulose-based polyurethane composite has been shown to prevent wool curling [22,196].…”

Section: Application Of Composites Based On Thermoplastic Polyurethan...mentioning

confidence: 99%

“…These enhancements can be attributed to the formation of a percolation network in the polymer matrix and strong hydrogen bonds between the nanocellulose which help to dissipate energy. Thanks to these percolated hydrogen bonding networks, new nanocellulose-based TPU materials are being developed which are able to respond to water [20][21][22] and changing pH levels [23,24]. Nanocellulose can also improve the photothermal, electrical, mechanical, and other functional properties of hybrid TPU materials containing carbon nanoparticles [25,26] or metal nanoparticles [27] by increasing the stability of dispersions in water and organic media as well as the adhesion of these nanofillers to the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

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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“…Other forms of nanocellulose have been used extensively to produce shape memory nanocomposites. In the recent decade, for example, scientists reported the use of bacterial cellulose and cellulose nano‐whisker to prepare the water‐responsive SMPU nanocomposites 23,24,70 . Applying CNFs, Wang et al 21 developed fast water‐responsive SMPU nanocomposites.…”

Section: Cellulose‐based Smpu Nanocompositesmentioning

confidence: 99%

“…In the recent decade, for example, scientists reported the use of bacterial cellulose and cellulose nano-whisker to prepare the waterresponsive SMPU nanocomposites. 23,24,70 Applying CNFs, Wang et al 21 developed fast water-responsive SMPU nanocomposites. They believed the synthesized polymer nanocomposites with fast and tailored shape memory F I G U R E 5 Digital photos representing the shape memory process of PECU films containing different loads of CNCÀC 6 H 4 NO 2 (0%, 10%, 20%, and 30%) immersed in acidic and alkaline media at room temperature.…”

Section: Cellulose-based Smpu Nanocompositesmentioning

confidence: 99%

A review on shape‐memory polyurethane nanocomposites: Focusing on the most important used nanofillers

Mohammadzadeh Koumleh,

Khoubi‐Arani,

Rahmani

2023

Polymer Engineering & Sci

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Over recent decades, great steps have been taken to study the shape‐memory polymer nanocomposites and their valuable applications by researchers. Considering the unique and distinguished applications of these materials and based on the fact that polyurethane is one of the most important shape‐memory polymers, there is still a need to publish papers associated with shape memory polyurethane nanocomposites. Despite several recent review papers related to the shape memory polyurethane nanocomposites, a specific review on the shape memory polyurethane nanocomposites that can cover the most important nanofillers used to prepare them is still lacking. This review paper not only classifies the reported studies related to the shape memory polyurethane nanocomposites either alone or with other polymers based on their nanofillers, but also has tried to find a connection between their actuation technique, nanofillers, and their applications.Highlights Recent developments in shape memory polyurethane nanocomposites were epitomized. Reported studies were classified based on the most important used nanofillers. A connection between the used nanofillers and applications was conceptualized.

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Production of thermal and water responsive shape memory polyurethane nanocomposite filaments with cellulose nanowhisker incorporation

Cited by 14 publications

References 84 publications

Characterization of Polyurethane Shape Memory Polymer and Determination of Shape Fixity and Shape Recovery in Subsequent Thermomechanical Cycles

Characterization of Polyurethane Shape Memory Polymer and Determination of Shape Fixity and Shape Recovery in Subsequent Thermomechanical Cycles

Nanocellulose-Based Thermoplastic Polyurethane Biocomposites with Shape Memory Effect

A review on shape‐memory polyurethane nanocomposites: Focusing on the most important used nanofillers

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