Article
Polymer Science
Ewa Kijenska-Gawronska, Adrian Maliszewski, Monika Bil
Summary: Fibrous shape memory scaffolds made of thermoplastic polyurethane were fabricated, and the effect of fiber diameter and alignment on crystallinity, mechanical properties, and shape memory was analyzed. The results showed that changes in fiber diameter did not significantly affect shape recovery coefficient, while longitudinal fiber alignment enhanced mechanical properties and shape recovery.
Article
Chemistry, Multidisciplinary
Zonghui Huang, Jianfeng Ban, Lulu Pan, Shuqing Cai, Junqiu Liao
Summary: This study presents a new type of star-shaped memory polyurethanes with both thermally responsive shape memory and self-healing properties, which can maintain shape memory properties even after undergoing thermally induced self-healing. It expands the current understanding of hydrogen-bond interaction features in SMPs with thermally responsive and thermally-induced self-healing properties.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Polymer Science
Jinlong Fan, Xiaohan Liang, William W. Yu, Dangwei Fu, Yanyan Yu, Hailong Liu, Jie Zhang
Summary: Partial crystalline polysiloxane-based polyurethane copolymers were synthesized using polydimethylsiloxane and disiloxane. The copolymers exhibited good tensile properties and multiple shape deformation. Tensile tests showed that stretching resulted in crystal destruction, but the microstructure became stable after twice stretching. Moreover, the lost crystallinity could be partially recovered through heat treatment.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Monika Bil
Summary: The continuous progress in medicine and biotechnology requires the development of novel biomaterials with multiple functions. By combining synthetic polymers and natural polymers, such as PU-2/3 PCL and CH-m composites, better performance in terms of shape memory properties and transition temperature can be achieved, even though a certain preheating time is needed.
Article
Chemistry, Multidisciplinary
Kai Gao, Qian Feng, Zeyuan Zhang, Ruoqian Zhang, Yali Hou, Chaoqun Mu, Xiaopeng Li, Mingming Zhang
Summary: Emissive metallacages are used as crosslinks to prepare metallacage-cored polyurethanes, which exhibit enhanced mechanical properties, good fluorescence, self-healing, and shape memory properties. This study provides a convenient strategy to prepare metallacage-crosslinked networks and explores their applications as smart materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Anand Utpal Vakil, Natalie Marie Petryk, Ellen Shepherd, Mary Beth B. Monroe
Summary: Polyurethane foams are widely used as a biomaterial system due to their ability to tune physical, chemical, and biological properties. By adding ether-containing monomers, shape memory polymer foams with tunable degradation rates have been synthesized for longer-term stability in various biomaterial applications. These SMP foams have the potential to provide controlled erosion profiles and up to 15% mass remaining after 108 days when used in oxidative and hydrolytic media for in vitro degradation assessment.
Article
Materials Science, Composites
Xiaoming Qi, Yubing Dong, Md Zahidul Islam, Yaofeng Zhu, Yaqin Fu, Shao-Yun Fu
Summary: The study successfully achieved excellent triple shape memory effect by regulating the crystalline structure transformation of EVA fibers. Dynamic mechanical analysis and differential scanning calorimetry observed a wide melting transition temperature, indicating the superior shape memory effect and tunable reversible effect of EVA fibers. Thermo-mechanical testing showed that EVA fibers have the ability to achieve an excellent triple shape memory effect and a superior recovery stress.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Aleksandra Debska, Piotr Gwozdziewicz, Andrzej Seruga, Xavier Balandraud, Jean-Francois Destrebecq
Summary: This paper introduces a method of prestressing concrete hollow cylinders using shape memory alloys (SMAs). By activating the memory effect through temperature variations, high stresses are generated to achieve prestressing. The authors conducted a series of experiments, observed the prestressing effects on cylinders of different diameters, and proposed conditions for effective prestressing.
Article
Materials Science, Multidisciplinary
Yanan Huang, Guiqing Dang, Min Zhu, Longfei Fan, Minzhi Rong, Mingqiu Zhang
Summary: Reversible shape memory polymers with a broad melting temperature range were developed to overcome the limitation of existing polymers. The polymers were able to memorize multiple temporary shapes through a thermal programming process. By selectively activating partial melting and recrystallization at different temperatures, the polymers demonstrated reversible triple, quadruple, and quintuple shape memory effects. This research may have significant implications for the application of reversible shape memory polymers.
APPLIED MATERIALS TODAY
(2023)
Article
Materials Science, Multidisciplinary
M. K. El Fawkhry
Summary: The solution treatment process is crucial in the manufacturing of iron-based shape memory alloys, affecting microstructural features such as grain size and transformation temperatures. Research shows that solution treatment at 1000 degrees C enhances the shape memory effect of iron-based SMAs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Instruments & Instrumentation
Haijia Chen, Fenghua Zhang, Ya Sun, Baozhong Sun, Bohong Gu, Jinsong Leng, Wei Zhang
Summary: This study utilized four-dimensional (4D) printing technology to fabricate a continuous carbon fiber reinforced polylactic acid shape memory composite with excellent electrothermal shape memory behavior. The introduction of carbon fiber not only significantly enhanced the strength of the composite material, but also improved the shape recovery force.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Chemistry, Physical
Haojie Niu, Yubin Sun, Chengxin Lin, Yutang Zou
Summary: Interference connection is an effective method for improving the fatigue life of bolt connections. A new method of interference connection based on the shape memory effect of shape memory alloy was designed in this study. Finite element analysis was used to analyze stress-strain rule of the bolt and the hole wall under different interference fit sizes, showing stress concentration at the orifice of the connecting plate.
Article
Materials Science, Multidisciplinary
Ramin Hamzehei, Ahmad Serjouei, Nan Wu, Ali Zolfagharian, Mahdi Bodaghi
Summary: This article introduces novel 3D zero Poisson's ratio (ZPR) metamaterials for reversible energy absorption applications fabricated by 4D printing technology. The designs are based on piecemeal energy absorption (PEA) and conventional energy absorption (CEA) approaches. Finite element analysis and experimental testing are used to validate the accuracy and performance of the designs. The article also demonstrates the shape recovery capability of the metamaterials through a thermal test.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wenkai Liu, Ao Wang, Ruibo Yang, Hecheng Wu, Shuren Shao, Jinlin Chen, Yan Ma, Zhen Li, Yanchao Wang, Xueling He, Jiehua Li, Hong Tan, Qiang Fu
Summary: This article introduces a new method to achieve a soft-to-stiff transition in shape-memory polyurethane by incorporating the principle of phase-transition-induced stiffening. By triggering segmental rearrangement and transformation of hard domains through water, the material achieves improved stress transfer and shape recovery.
ADVANCED MATERIALS
(2022)
Article
Robotics
Qiao Qiao, Gianni Borghesan, Joris De Schutter, Emmanuel Vander Poorten
Summary: This research explores using shape sensing as a method to extract force information in medical devices, allowing for simultaneous shape and force sensing. By reconstructing shape information using fiber Bragg grating sensors on a multicore fiber and utilizing an extended Kalman filter and mechanics model, it is possible to estimate both the magnitude and location of externally applied forces. The experiments demonstrated that the proposed method can estimate force magnitude and location with reasonable accuracy, with the sensitivity of flexible instruments affecting the accuracy of force sensing.
IEEE TRANSACTIONS ON ROBOTICS
(2021)
Article
Biochemistry & Molecular Biology
Irfa Basharat Rajput, Fahad Khan Tareen, Atif Ullah Khan, Naveed Ahmed, Muhammad Farhan Ali Khan, Kifayat Ullah Shah, Abbas Rahdar, Ana M. Diez-Pascual
Summary: Scaffold development for drug delivery was investigated in this study. A biocompatible and biodegradable scaffold loaded with aceclofenac was prepared via chemical cross-linking method. Optimized formulation exhibited high porosity and swelling index, sustained drug release, homogeneous microstructure and good injectability. Mathematical models fit the in-vitro data well with Korsmeyer-Peppas model.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Biochemistry & Molecular Biology
Ayesha Kausar, Ishaq Ahmad, Malik Maaza, M. H. Eisa
Summary: Securing existing water resources is crucial and several advanced water treatment technologies have been developed. The development of water filtration membranes for desalination, ion permeation, and microbes handling is considered the most successful methodology. Polymer/fullerene nanocomposite membranes have important applications in water treatment, leading to revolutions in high-performance membranes.
Review
Polymer Science
Ayesha Kausar
Summary: This review focuses on the structure and features of high performance covalently linked polymer/fullerene nanocomposites. Through covalent bonding, polymer chains can be attached to fullerene molecules, which improves fullerene dispersion and interactions with the matrix-nanofiller. Fullerene molecules have been grafted onto conducting polymers and thermoplastic/thermosetting polymers/block copolymers, resulting in exceptional structural, morphological, electrical, thermal, and other physical properties. Unique star-shape/dendritic polymer/fullerene assemblies have also been observed. The covalently interconnected polymer/fullerene nanocomposites exhibit remarkable physical properties for high-tech applications such as solar cells, optical sensors, supercapacitors, and biomedical fields.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
Review
Materials Science, Composites
Ayesha Kausar, Ishaq Ahmad, Sobia A. Rakha, M. H. Eisa, Abdoulaye Diallo
Summary: This article summarizes the fundamentals, design, and manufacturing strategies used for sandwich composites. It discusses the different core materials, manufacturing techniques, and machining processes involved in the production of sandwich composite structures. It also highlights the high-performance significance of sandwiched composite structures in industries such as aerospace, automobile, and energy absorption applications.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Review
Materials Science, Composites
Ayesha Kausar, Ishaq Ahmad
Summary: Electromagnetic interference affects electronic devices, surroundings, and human health. Conducting polymers and their nanocomposites with nanoparticles have been developed for effective EMI shielding. These materials offer fine electrical conductivity and enhanced radiation protection capabilities.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Review
Materials Science, Composites
Ayesha Kausar, Ishaq Ahmad, Tingkai Zhao, Malik Maaza, Patrizia Bocchetta
Summary: Fuel cell efficiency can be enhanced by using progressive electrodes and electrolytes, including green nanomaterials and green technologies. The replacement of platinum-based electrodes with green materials and nanocomposites through green fabrication approaches leads to the development of environmentally friendly fuel cells. The application of green nanocomposites in fuel cell electrode and electrolyte materials, along with green synthesis techniques, has demonstrated significant improvements in morphology, impedance, resistance, power density, current density, electrochemical features, proton conductivity, and overall efficiency. The future importance and challenges of utilizing green nanocomposites in electrodes and electrolytes to achieve efficient fuel cells are also discussed.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Review
Materials Science, Composites
Ayesha Kausar, Ishaq Ahmad, Tingkai Zhao, M. H. Eisa, O. Aldaghri, Meenal Gupta, Patrizia Bocchetta
Summary: Graphene, a unique nanocarbon nanostructure, is widely used in the formation of nanocomposites. Recently, there has been a focus on green-synthesized graphene due to environmental concerns. This review highlights the application of green-synthesized graphene-based nanocomposites in energy storage devices, specifically in supercapacitor components. The structural diversity of polymer/green-synthesized graphene nanocomposites has improved the performance of supercapacitor electrodes by enhancing charge transportation/storage capacity, specific capacitance, capacitance retention, cyclability, and durability. Factors such as green synthesis methods, graphene functionality, dispersion, and interactions with the matrix-nanofiller also influence the supercapacitance properties and performance. Further research on innovative polymer and green graphene-derived nanocomposites may address the challenges in design and performance for technical applications.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Iqra Chaudhery, Marya Nawaz Malik, Tofeeq Ur-Rehman, Humaira Fatima, Asim Ur-Rehman, Naveed Ahmed, Abdelhamid Elaissari
Summary: The aim of this study was to develop a accurate and precise Reverse-Phase HPLC method for detecting and quantifying roflumilast in Lipid-nanoparticles. The validated method showed high sensitivity and specificity for the verification of roflumilast in lipid-based formulations.
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Medicinal
Bazla Siddiqui, Haroon Ahmed, Ihsan-ul- Haq, Asim. ur. Rehman, Naveed Ahmed
Summary: The aim of this study was to develop an analytical method for simultaneous detection of LEF and FA in polymeric nanocarriers. The method involved the fabrication of folate conjugated LEF nanocarriers for targeted delivery in the treatment of rheumatoid arthritis. HPLC was used as the sensitive and accurate analytical technique for the detection and estimation of both agents.
DRUG DEVELOPMENT AND INDUSTRIAL PHARMACY
(2023)
Review
Biochemistry & Molecular Biology
Ayesha Kausar, Ishaq Ahmad, Tingkai Zhao, Osamah Aldaghri, Khalid H. H. Ibnaouf, M. H. Eisa
Summary: This review focuses on the applications of polymer/graphene nanocomposites in energy storage and conversion devices such as supercapacitors, Li-ion batteries, and fuel cells. Graphene's unique structure and features make it an indispensable material among carbon nanomaterials. Graphene-based nanocomposites provide advanced properties such as high surface area, electron conductivity, capacitance, energy density, charge-discharge, cyclic stability, and power conversion efficiency for efficient energy devices. Furthermore, these nanocomposites exhibit superior microstructure, mechanical robustness, and heat stability. Despite their essential features, overcoming challenges is necessary to achieve advanced device performance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Materials Science, Multidisciplinary
Ayesha Kausar
Summary: Graphite can be converted into nano-graphite through physical and chemical methods, which has better performance than pristine graphitic materials. This review focuses on the essential features, design versatilities, and applications of polymer/nano-graphite nanocomposites in solar cells, electromagnetic shielding, and electronic devices.
C-JOURNAL OF CARBON RESEARCH
(2023)
Review
Materials Science, Multidisciplinary
Ayesha Kausar, Ishaq Ahmad, M. H. Eisa, Malik Maaza
Summary: This review explores the impact of graphene and graphene-based nanocomposites on aerospace applications. Graphene-derived nanocomposites have been considered for their fabrication and indispensable features. Aerospace nanocomposites with graphene have been investigated for various applications including processability, structural features, morphology, heat stability, mechanical properties, flame resistance, electrical/thermal conductivity, radiation protection, and adhesion.
C-JOURNAL OF CARBON RESEARCH
(2023)
Review
Polymer Science
Ayesha Kausar
Summary: This review discusses the design and existing/emerging technologies of carbohydrate polymeric nanocomposites and their promising applications in the biomedical field. The interactions between the matrix and nanofillers create synergistic effects, enabling these nanocomposites to be used in various biomedical applications such as biosensing, antibacterial activities, wound healing, tissue engineering, and drug delivery systems.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
Review
Polymer Science
Ayesha Kausar
Summary: Shape memory polymer can recover its original shape under external stimuli, and by incorporating nanocarbons, especially fullerene, its performance can be enhanced. The nanocomposite exhibits superior structural characteristics and shape memory effects, while the matrix-nanofiller interaction and compatibility improve dispersion and nanomaterial properties.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
Review
Polymer Science
Ayesha Kausar
Summary: This article presents recent research progress in the field of conducting polymer and fullerene-based nanocomposites, which have wide applications in energy and electronics sectors.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
