1
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Zhang L, Chai W, Zhang J, Chen Z, Yue Z, Wang J, Yu J. Switchable surface and loading/release of target molecules in hierarchically porous PLA nonwovens based on shape memory effect. RSC Adv 2024; 14:6199-6204. [PMID: 38375019 PMCID: PMC10875605 DOI: 10.1039/d3ra08411f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 02/09/2024] [Indexed: 02/21/2024] Open
Abstract
In this work, hierarchically porous PLA (polylactic acid) shape memory nonwovens were prepared by electrospinning its blend solution with PEO (polyethylene oxide) and subsequent water etching. Based on shape memory effect resulting from tiny crystals and the amorphous matrix of PLA, the switch between compact and porous surfaces has been achieved via cyclical hot-pressing and recovery in a hot water bath. After hot-pressing, the disappearance of hierarchical pores contributes to compact surface, enabling embedding of the target molecule in PLA nonwoven (i.e., CLOSE state). Upon exposure to heat, PLA nonwoven recovers to its permanent shape and exhibits a porous surface, providing a penetrative diffusion pathway for small molecules (i.e., OPEN state). The hierarchically porous structure and shape memory effect endow PLA nonwoven with the capability of rapid release. Our results provide a good candidate for some potential applications, such as temperature-controlled quick-release of catalysts and drugs.
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Affiliation(s)
- Lishuo Zhang
- College of Safety Science and Engineering, Liaoning Technical University Huludao 125105 China
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Wenqiang Chai
- Tongxiang Jianmin Filter Material Product Co. LTD. 314511 Jiaxing China
| | - Jiaru Zhang
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Zhouli Chen
- Zhejiang Institute of Mechanical & Electrical Engineering Hangzhou 311203 China
| | - Ziyang Yue
- College of Science, Liaoning Technical University Fuxin 123000 China
| | - Jiayao Wang
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Jiankang Yu
- College of Safety Science and Engineering, Liaoning Technical University Huludao 125105 China
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2
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Baniasadi H, Madani Z, Mohan M, Vaara M, Lipponen S, Vapaavuori J, Seppälä JV. Heat-Induced Actuator Fibers: Starch-Containing Biopolyamide Composites for Functional Textiles. ACS APPLIED MATERIALS & INTERFACES 2023; 15:48584-48600. [PMID: 37787649 PMCID: PMC10591286 DOI: 10.1021/acsami.3c08774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 09/21/2023] [Indexed: 10/04/2023]
Abstract
This study introduces the development of a thermally responsive shape-morphing fabric using low-melting-point polyamide shape memory actuators. To facilitate the blending of biomaterials, we report the synthesis and characterization of a biopolyamide with a relatively low melting point. Additionally, we present a straightforward and solvent-free method for the compatibilization of starch particles with the synthesized biopolyamide, aiming to enhance the sustainability of polyamide and customize the actuation temperature. Subsequently, homogeneous dispersion of up to 70 wt % compatibilized starch particles into the matrix is achieved. The resulting composites exhibit excellent mechanical properties comparable to those reported for soft and tough materials, making them well suited for textile integration. Furthermore, cyclic thermomechanical tests were conducted to evaluate the shape memory and shape recovery of both plain polyamide and composites. The results confirmed their remarkable shape recovery properties. To demonstrate the potential application of biocomposites in textiles, a heat-responsive fabric was created using thermoresponsive shape memory polymer actuators composed of a biocomposite containing 50 wt % compatibilized starch. This fabric demonstrates the ability to repeatedly undergo significant heat-induced deformations by opening and closing pores, thereby exposing hidden functionalities through heat stimulation. This innovative approach provides a convenient pathway for designing heat-responsive textiles, adding value to state-of-the-art smart textiles.
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Affiliation(s)
- Hossein Baniasadi
- Polymer
Technology, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - Zahra Madani
- Department
of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - Mithila Mohan
- Department
of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - Maija Vaara
- Department
of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - Sami Lipponen
- Polymer
Technology, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - Jaana Vapaavuori
- Department
of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland
| | - Jukka V. Seppälä
- Polymer
Technology, School of Chemical Engineering, Aalto University, Kemistintie 1, 02150 Espoo, Finland
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3
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Ramasamy C, Low HY. Triple and Quadruple Surface Pattern Memories in Nanoimprinted Polymer Blends. ACS APPLIED MATERIALS & INTERFACES 2023; 15:2357-2367. [PMID: 36546466 DOI: 10.1021/acsami.2c17381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Trigger-responsive surfaces with multiple surface properties have wide-ranging application potential from surfaces with trigger-responsive fluid flow to cell culture to optical effects; such surfaces can be achieved through surface morphological changes. Although multiple shape-memory effects are successful in bulk polymers, there is limited programing and recovery of multiple surface memories due to the challenges in fabricating multiple surface topographies with good controllability. Here, we report the synergy between the polymer blend formulation and the thermal nanoimprinting process to achieve multiple microtopography memories. A series of immiscible blends consisting of poly(caprolactone) (PCL) and polyethylene (PE) with distinct thermal transitions governed by distinct crystallization events were augmented with improved elasticity through preferential cross-linking in the polymer blend. The effect of preferential cross-linking by dicumyl peroxide on the elastic property of the PCL/PE has been found to be nonlinearly dependent on the blend composition. This approach enabled triple and quadruple surface pattern fixity and recovery in nanoimprinted PCL/PE blends. Specifically, we demonstrated the recovery of a micropillar structure (diameter: 20 μm and height: 10 μm) from a hierarchical micrograting topography (width: 2 μm and height: 2 μm) when exposed to a thermal stimulus at 60 °C for 180 s. Furthermore, we also demonstrated the recovery of a deformed micrograting followed by a secondary recovery of the micropillar structure.
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Affiliation(s)
- Chitrakala Ramasamy
- Engineering Product Development, Singapore University of Technology and Design, Singapore487372, Singapore
| | - Hong Yee Low
- Engineering Product Development, Singapore University of Technology and Design, Singapore487372, Singapore
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, Singapore487372, Singapore
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4
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Bonardd S, Ramirez O, Abarca G, Leiva Á, Saldías C, Díaz DD. Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity. Int J Biol Macromol 2022; 217:864-877. [PMID: 35907452 DOI: 10.1016/j.ijbiomac.2022.07.197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/13/2022] [Accepted: 07/24/2022] [Indexed: 11/05/2022]
Abstract
The preparation of porous and non-porous chitosan thin-films containing gold nanoparticles was carried out, aiming to evaluate the effect of porosity on their catalytic response using the p-nitrophenol reduction as model reaction. To achieve this, both types of samples were decorated with gold nanoparticles having similar characteristics in terms of amount, size and shape, which were synthesized following a two-step adsorption-reduction process. The results demonstrated that the presence of porosity generates a considerable enhancement of the catalytic property. This behavior is reflected in higher kinetic constant and conversion values, along with a better recyclability after consecutive cycles. The inclusion of porosity in nanocomposites afforded kobs values 7.5 times higher than the non-porous material, as well as conversion values as high as 80 % in <20 min. On the other hand, as an additional experiment, a porous sample prepared with half the amount of gold also exhibited a better performance than the non-porous catalyst, revealing that the porosity allowed to decrease the amount of catalytic metal used and still exhibiting kobs values 5.9 times higher than the non-porous specimen. These studies demonstrate that there is an important synergistic support-nanostructure relationship, which strongly influences the performance of the nanomaterial.
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Affiliation(s)
- Sebastian Bonardd
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Tenerife, Spain; Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain.
| | - Oscar Ramirez
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Tenerife, Spain; Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain; Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 302, Correo 22, Santiago, Chile
| | - Gabriel Abarca
- Universidad Bernardo O'Higgins, Centro Integrativo de Biología y Química Aplicada (CIBQA), General Gana 1702, Santiago, Chile
| | - Ángel Leiva
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 302, Correo 22, Santiago, Chile
| | - César Saldías
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 302, Correo 22, Santiago, Chile
| | - David Díaz Díaz
- Departamento de Química Orgánica, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 3, La Laguna 38206, Tenerife, Spain; Instituto de Bio-Orgánica Antonio González, Universidad de La Laguna, Avda. Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain; Institute of Organic Chemistry, University of Regensburg, Universitätstr. 31, Regensburg 93053, Germany
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Zhao J, Zhang L, Du X, Xu J, Lin T, Li Y, Yang X, You J. Panther chameleon-inspired, continuously-regulated, high-saturation structural color of a reflective grating on the nano-patterned surface of a shape memory polymer. NANOSCALE ADVANCES 2022; 4:2942-2949. [PMID: 36132013 PMCID: PMC9418828 DOI: 10.1039/d2na00075j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
In this work, surface nano-stripes and a reflective grating have been fabricated on shape memory polymers (SMPs) to simulate the active color change of chameleons. The structural color resulting from the interference of reflected light exhibits high saturation and it can be regulated continuously based on the shape memory effect. In addition to the viewing angle, the attained color is sensitive to the deformation at the macroscale. Uniaxial tension along stripes at high temperature produces a remarkable blueshift of the resultant color (from red to green and blue) which can switch back to red after shape recovery upon heating. The evolution of structural color can be attributed to the lower and higher magnitudes of nano-structure periods in temporary (deformed) and permanent (recovery) states respectively. Based on the combination of angle and deformation dependences of structural color, a "colorful" product code has been fabricated. It exhibits enhanced ability to hide and display information which plays an important role in anti-counterfeiting.
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Affiliation(s)
- Jiaqin Zhao
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
| | - Liang Zhang
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
| | - Xinyue Du
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
| | - Jinyan Xu
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
| | - Taotao Lin
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
| | - Yongjin Li
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
| | - Xuxin Yang
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
| | - Jichun You
- Hangzhou Normal University No. 2318 Yuhangtang Rd. Hangzhou 311121 China
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6
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Wrinkled CNTs@PLLA Composite Membranes for Enhanced Separation Performance. MEMBRANES 2022; 12:membranes12030278. [PMID: 35323753 PMCID: PMC8948802 DOI: 10.3390/membranes12030278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 01/27/2023]
Abstract
To break the trade-off effect between permeability and selectivity in separation, wrinkled carbon nanotubes@polylactic acid (CNTs@PLLA) composite membranes were successfully fabricated in this work. On pre-deformed PLLA membranes, CNTs were loaded by filtrating their suspension, followed by releasing the PLLA upon heating based on its shape memory effect. The asynchronous deformations of CNTs and PLLA layers produced wrinkled CNTs@PLLA composite membranes. Relative to the reference without wrinkles, the attained wrinkled composite membranes exhibit much higher flux (~12 times) without any loss of rejection ratio during the separation of water-in-hexadecane emulsion. The significant improvement of separation performance can be attributed to the following issues: Firstly, the existence of wrinkles results in higher surface roughness, providing an additional driving force for separation resulting from the enlarged contact-angle difference between water and oil; Secondly, the shrinkage of the supporting PLLA layer during recovery induces the preferred alignment of CNTs along the wrinkle direction, which is the reason for the orientated slit pores with enhanced overlap of neighboring pores in the film-thickness direction; Finally, a wrinkled surface significantly increases the available area for separation. The synergism of the effects discussed above contributes to much higher permeability and comparable selectivity relative to the reference.
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Zhao J, Zhang L, Cheng X, Wang J, Li Y, You J. Programmable Transition between Adhesive/Anti-Adhesive Performances on Porous PVDF Spheres Supported by Shape Memory PLLA. Polymers (Basel) 2022; 14:polym14030374. [PMID: 35160365 PMCID: PMC8839783 DOI: 10.3390/polym14030374] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 01/07/2022] [Accepted: 01/13/2022] [Indexed: 02/05/2023] Open
Abstract
Superhydrophobic surfaces with switchable adhesive/anti-adhesive performances are highly desired but still challenging. Herein, by loading porous poly (vinylidene fluoride) (PVDF) spheres on a shape memory polylactic acid (PLLA) film, a quasi-superhydrophobic surface of composite film (PVDF@PLLA) with the ability to tailor its surface structures/composition and related adhesive behaviors was fabricated. The as-prepared surface is covered by porous PVDF spheres. The combination of hydrophobicity of PVDF and hierarchical roughness resulted from porous spheres contributing to the high contact angle and low sliding angle, corresponding to Cassie state and lotus leaves effect. Upon uniaxial or biaxial tension, the distance among hydrophobic spheres is so high that more and more hydrophilic defects (PLLA film) have been exposed to water droplets, accounting for the quasi-superhydrophobic surface with a higher sliding angle. This is the reason for the Wenzel state and rose petals effect. After heating, PLLA film recovers to its original state. The porous PVDF spheres cover the whole film again, leading to the enhanced mobility of water droplets on the surface. The transition between the rose petals effect and the lotus leaves effect is programmable and reversible. Our result provides a novel strategy to tailor adhesive behaviors by combining (quasi-)superhydrophobic surface with shape memory effect.
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Feng W, Zhang YS, Shao YW, Huang T, Zhang N, Yang JH, Qi XD, Wang Y. Coaxial electrospun membranes with thermal energy storage and shape memory functions for simultaneous thermal/moisture management in personal cooling textiles. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110245] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Zhang L, Zhao J, Xu J, Zhao J, Zhu Y, Li Y, You J. Switchable Isotropic/Anisotropic Wettability and Programmable Droplet Transportation on a Shape-Memory Honeycomb. ACS APPLIED MATERIALS & INTERFACES 2020; 12:42314-42320. [PMID: 32830490 DOI: 10.1021/acsami.0c11224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Programmable droplet transportation is required urgently but is still challenging. In this work, breath figure was employed to fabricate shape-memory poly(lactic acid) (PLLA) honeycombs in which tiny crystals and an amorphous network act as the shape-fixed phase and recovery phase, respectively. Upon uniaxial tension, circle pores from the breath figure were deformed to elliptical pores, producing contact angle differences and anisotropic wetting behaviors in two directions. Both pore geometry and anisotropic wettability can be tailored via the draw ratio. On the PLLA honeycomb surface with a lower draw ratio, the contact angle difference is too small to induce droplet transportation along the desired direction. In the case of a higher draw ratio, however, the movement of water droplets has been controlled absolutely along the tension direction. The transition between them can be achieved reversibly during uniaxial tension and recovery processes based on the shape-memory effect. The enhanced flow control, which can be attributed to the synergism between optimal hydrophobicity and enlarged anisotropic wetting behaviors, endows water droplets with the ability to turn a corner spontaneously on a V-shaped surface including two regions exhibiting different oriented directions.
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Affiliation(s)
- Liang Zhang
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Jingxin Zhao
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Jinyan Xu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Jiaqin Zhao
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Yutian Zhu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Yongjin Li
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Jichun You
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
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Wang Y, Tian S, Sun Q, Liu W, Duan R, Yang H, Liu X, Chen J. Superhydrophobic Porous PLLA Sponges with Hierarchical Micro‐/Nano‐Structures for High‐Efficiency Self‐Cleaning. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yongtao Wang
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Shilin Tian
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Qingqing Sun
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Wentao Liu
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Ruixia Duan
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Huige Yang
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Xuying Liu
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
| | - Jinzhou Chen
- School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 P. R. China
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Hou Y, Fang G, Jiang Y, Song H, Zhang Y, Zhao Q. Emulsion Lyophilization as a Facile Pathway to Fabricate Stretchable Polymer Foams Enabling Multishape Memory Effect and Clip Application. ACS APPLIED MATERIALS & INTERFACES 2019; 11:32423-32430. [PMID: 31409064 DOI: 10.1021/acsami.9b11424] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Solvent freezing is an important method to produce polymer foams with highly tunable pore structure. However, foams prepared from aqueous solution precursors commonly suffer from poor water resistance, whereas those organo-phase systems are not environmental friendly. Here, we present that using an emulsion lyophilization method can overcome such a contradiction and synthesize multifunctional polymer foams. Commercially available polyacrylate-based emulsions with various targeted glass transition temperatures (Tgs) were applied. Adipodihydrazide molecules contained in the water phase of the emulsions reacted with the acetyl groups on the polymers during the freeze-drying, forming elastic networks to maintain the pore structure. The foams can tolerate a 650% elongation without failure and are notch insensitive. The porosity of the foams can be tuned from approximately 45 to 90% via lyophilization of diluted emulsions. The facile blending of emulsions with different targeted Tgs enabled foams with multishape memory capability. Moreover, the foams showed an excellent mechanical damping property, and the slow recovery nature enabled a clip application of clamping extremely weak objects.
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Affiliation(s)
- Yukun Hou
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Guangqiang Fang
- Institute of Aerospace System Engineering Shanghai , Shanghai 201109 , China
- Space Structure and Mechanism Technology Laboratory of China Aerospace Science and Technology Group Co.Ltd , Shanghai 201109 , China
| | - Yongbo Jiang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Huijie Song
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Yuhua Zhang
- Zhejiang Provincial People's Hospital , Hangzhou 310014 , China
- People's Hospital of Hangzhou Medical College , Hangzhou 310014 , China
| | - Qian Zhao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
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