Photo-thermal actuation of ultra-drawn high-density polyethylene

Bhatti, Muhammad Rehan Asghar; Bilotti, Emiliano; Zhang, Han; Bastiaansen, Cees W. M.; Peijs, Ton

doi:10.1016/j.polymer.2020.122897

Cited by 5 publications

(25 citation statements)

References 41 publications

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“…For instance, our group has also demonstrated a melt‐processed ultra‐drawn high‐density polyethylene actuator. [ 63 ] Actuation was again triggered by light energy absorbed by the BZT and transferred into heat. The generated heat induced entropy driven contraction of the extended macromolecular chains, and when constrained, resulted in an actuation stress (≈20 MPa) at a strain of 0.1%.…”

Section: Synthetic Polymer Materials For Photo‐actuationmentioning

confidence: 99%

“…This light can simply heat the material or initiate an isomerization or combination thereof The rise in temperature of host polymers (as observed through infrared thermal images) is established only in the presence of these photo-responsive additives. [61][62][63] Light energy upon absorption causes the transformation of isomeric conformation states of photo-chromophores (attached to host molecules) by overcoming the energy barrier in between these states. For example; azobenzene is a photo-chromic molecule, which upon absorption of a photon within the absorption band undergoes an efficient and reversible photoisomerization.…”

Section: Light-driven Actuatorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Light‐Driven Actuation in Synthetic Polymers: A Review from Fundamental Concepts to Applications

Bhatti

Kernin

Tausif

et al. 2022

Advanced Optical Materials

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Light‐driven actuation of synthetic polymers is an emerging field of interest because it offers simple remote addressing without complicated hydraulic, electric, or magnetic systems. Reviews on this area predominantly emphasize on the development of mechanical motions like bending, twisting, folding, etc. However, the scientific and fundamental aspects of these materials are critical in order to expand applications and industrial relevance. Polymer actuators driven by light, not only comprise soft actuators (large deformations at low stress) but also include stiff actuators (high actuation stress at low strain). Synthetic polymeric materials with photo‐responsive additives together with underlying mechanisms, processing parameters, and final properties are required to broaden the scope of the field. In particular, parameters like actuation stress, actuation strain, and work capacity have been given limited attention in the past and are discussed extensively. This work gives a comprehensive critical review on all light‐driven synthetic polymer actuators, their actuating mechanisms, and materials. A holistic perspective together with an insight into future prospects can lead academia and industry toward future innovations and applications of these exciting functional materials.

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Section: Synthetic Polymer Materials For Photo‐actuationmentioning

confidence: 99%

Section: Light-driven Actuatorsmentioning

confidence: 99%

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Light‐Driven Actuation in Synthetic Polymers: A Review from Fundamental Concepts to Applications

Bhatti

Kernin

Tausif

et al. 2022

Advanced Optical Materials

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“…It was recently shown that such transparent oriented UHMWPE or HDPE films incorporating BZT can also lead to light‐responsive polymer actuators with rapid response and exceptionally high actuation stress. [ 83‐85 ]…”

Section: Monoaxially Stretched Transparent Semicrystalline Polymersmentioning

confidence: 99%

“…Recently, our research team also reported that the incorporation of photo‐responsive dyes or additives (like azobenzene C78‐AZO or a UV‐absorber BZT) to oriented transparent HDPE or UHMWPE films could induce photo‐thermal actuation as shown in Figure 9C‐F. [ 83‐85 ] Upon exposure to UV light, photo energy absorbed by the BZT is converted into heat. This in combination with the negative thermal expansion (NTE) coefficient of oriented PE results in contraction along the chain orientation direction and if constrained in an actuation stress.…”

Section: Transparent Nanocomposites Based On Semicrystalline Polymersmentioning

confidence: 99%

Transparent semi‐crystalline polymeric materials and their nanocomposites: A review

Lin

Bilotti

Bastiaansen

et al. 2020

Polymer Engineering & Sci

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137

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Optical transparency is an important property for a material, especially in certain fields like packaging, glazing, and displays. Existing commercial transparent polymeric materials are mostly amorphous. Semicrystalline polymers have often-superior chemical resistance and mechanical properties particularly at elevated temperatures or after solid-state drawing but they appear opaque or white in most cases. This review describes the present state-of-the-art of methodologies of fabricating optically transparent materials from semicrystalline polymers. A distinction is made between isotropic, biaxially stretched, and uniaxially stretched semicrystalline polymers. Furthermore, some functionalities of transparent nanocomposites based on semicrystalline polymers are also discussed. This review aims to provide guidelines regarding the principles of manufacturing transparent high-performance semicrystalline polymers and their nanocomposites for potential applications in fields like packaging, building, and construction, aerospace, automotive, and opto-electronics.

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3D Anisotropic Polyethylene as Light‐Responsive Grippers and Surfing Divers

Pan

Grossiord

Sol

et al. 2021

Adv Funct Materials

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Untethered soft actuators are usually based on 3D engineered special polymers such as liquid crystal networks or hydrogels that require complex fabrication methods. Here, an easy‐to‐process, anisotropic composite soft actuator based on a simple photothermal dye‐doped polyethylene film is presented. The 3D anisotropic polymer films are prepared by solution‐casting and subsequent thermal solid‐stretching. The resulting soft actuators exhibit large and controllable bending in response to light (UV and/or near‐infrared (NIR)) and are able to act as grippers picking up cargo. Additionally, the films are capable of realizing “diving” and “surfing” locomotion in and over a liquid via the photothermal induced Marangoni effect, yielding a NIR light‐fueled transporter able to pick up cargo. The results open up new possibilities of using commodity polymers in a broad range of applications including untethered soft actuators and robotic devices.

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Photo-thermal actuation of ultra-drawn high-density polyethylene

Cited by 5 publications

References 41 publications

Light‐Driven Actuation in Synthetic Polymers: A Review from Fundamental Concepts to Applications

Light‐Driven Actuation in Synthetic Polymers: A Review from Fundamental Concepts to Applications

Transparent semi‐crystalline polymeric materials and their nanocomposites: A review

3D Anisotropic Polyethylene as Light‐Responsive Grippers and Surfing Divers

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