Article
Polymer Science
Minzimo Song, Xiaoxuan Liu, Hangbo Yue, Shanji Li, Jianwei Guo
Summary: The newly designed bio-polyurethane material based on PLA/PCL exhibits excellent mechanical properties and shape memory effects, autonomously switching between different shapes at specific temperatures. Moderate cross-linking of the bio-polyurethane using chitooligo-saccharide successfully promotes the formation of a microphase-separated structure between the hard phase and soft phase.
Article
Polymer Science
Maria Staszczak, Mana Nabavian Kalat, Karol Marek Golasinski, Leszek Urbanski, Kohei Takeda, Ryosuke Matsui, Elzbieta Alicja Pieczyska
Summary: Multifunctional polyurethane shape memory polymers have gained increasing interest in various applications. This study focuses on the characterization and functional properties of a thermoset PU-SMP with a glass transition temperature of 45 degrees C. The results show excellent shape memory behavior and suggest potential use in critical industrial applications. The thermomechanical behavior of the polymer was investigated, confirming its shape memory properties and the stability of chemical crosslinks in the material structure.
Article
Biochemistry & Molecular Biology
Shakiba Nikfarjam, Rebecca Gibbons, Faraz Burni, Srinivasa R. Raghavan, Mikhail A. Anisimov, Taylor J. Woehl
Summary: Cells can assemble dynamic protein-based nanostructures through dissipative assembly. In this study, we demonstrated the dissipative cross-linking of transient protein hydrogels using a redox cycle, which exhibited protein unfolding-dependent lifetimes and mechanical properties. The results indicate that the protein secondary structure mediated the transient hydrogel's lifetime and mechanical properties by mediating the redox reactions.
Article
Chemistry, Physical
Chunyang Bao, Xuhao Zhang, Pengdong Yu, Qingzhong Li, Yusheng Qin, Zhirong Xin
Summary: This study successfully synthesized degradable polyurethane thermosets with high mechanical strength and toughness, with PTMEG-HDI-BA(1.5) exhibiting optimal performance. The toughness of poly(boron-urethanes) even surpasses that of spider dragline silk. The labile nature of boron-urethanes enables rapid degradation of the materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Polymer Science
Sjoerd J. Rijpkema, Rik van Egeraat, Wei Li, Daniela A. Wilson
Summary: This study reports a synthesis method for stable and catalytically active polymer vesicle nanoreactors. By cross-linking the polymer vesicle membranes, the stability and permeability issues are addressed, allowing the incorporation of functional handles. Additionally, co-assembly with specific ratios of polymers also results in the formation of pores, further expanding the application of this nanoreactor.
Article
Materials Science, Composites
Arun Saini, Young-Wook Chang, Hyeok-Jun Ahn, Min-Young Lyu
Summary: In this study, blends of polylactic acid (PLA) and thermoplastic polyurethane (TPU) were prepared and investigated for their shape memory properties. The results showed that the prepared blends exhibited significant shape memory effect at specific weight ratios, making them suitable for applications in aerospace engineering, engineering plastics, biomedical implant materials, and textiles.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Materials Science, Characterization & Testing
Wenwen Zhang, Xuefei Leng, Mengyun Gao, Zhiyong Wei, Yiying Wang, Yang Li
Summary: A series of shape memory polymers were prepared by incorporating disulfide bonds for self-healing ability. The polyurethane demonstrated impressive shape memory capability and high potential for biomedical applications.
Article
Pharmacology & Pharmacy
Linus Grossmann, Maximilian Kieckhoefer, Werner Weitschies, Julius Krause
Summary: Thermoplastic polyurethanes are versatile materials used in research, medicine, and pharmacy. This study explores the use of 3D printing to produce foldable objects from different thermoplastic polyurethane filaments. The shape memory behavior of the dosage forms is utilized to fold and package them. The unfolding time and dimensional recovery of the 3D printed dosage forms are investigated based on material properties and shape, aiming to evaluate their potential for sustained drug delivery or medical devices.
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
(2022)
Article
Materials Science, Multidisciplinary
Qiang Yang, Jing Guo, Yuanfa Liu, Fucheng Guan, Jingxing Song, Xueyong Gong
Summary: The novel C/AKP composite fibers with a multiple cross-linking network showed enhanced properties such as stronger crystallization ability and higher orientation degree, reaching optimal performance at a GA content of 0.2 wt%.
ADVANCED FIBER MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Wei-Hua Han, Qing-Yu Wang, Yuan-Yi Kang, Li-Rui Shi, Yu Long, Xin Zhou, Chun-Cheng Hao
Summary: This review comprehensively discusses the cross-linking electrospinning system for the first time, including cross-linking strategies, cross-linking mechanisms, and applications of cross-linked electrospun nanofibers. The significance of cross-linking electrospinning and the challenges in constructing this system are also highlighted.
Article
Polymer Science
Yajun Deng, Changan Zhang, Tao Zhang, Bo Wu, Yanmei Zhang, Jianhua Wu
Summary: In this study, a fluorinated waterborne polyurethane (FWPU) was successfully synthesized and its thermal stability and mechanical properties were improved by adding a cross-linking agent. The FWPU exhibited good hydrophobicity and mechanical properties, making it a promising alternative to other materials.
Article
Materials Science, Multidisciplinary
Ruhan Yang, Weijie Li, Ruibin Mo, Xinya Zhang
Summary: In this study, a series of recyclable biobased dynamic cross-linking epoxy polymers were synthesized using biobased materials under solvent-free conditions. The triamine cross-linker significantly influenced the properties of the polymers, and the polymer with polyetheramine T403 showed a good shape memory effect. The polymers exhibited good recyclability when the dynamic bond content was appropriate.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Agriculture, Multidisciplinary
Anqi Guo, Jiang Jiang, Alma D. True, Youling L. Xiong
Summary: This study investigated the effects of six phenolic compounds on myofibrillar protein gelation, finding that EGCG has a strong elastic-promoting effect, while monophenols and diphenols are more conducive to increasing the strength of protein gels, and the flavanol structure appears to interfere with protein gel structure development.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Polymer Science
Zhishuai Geng, Aimin Pang, Tengfei Ding, Xiaoyan Guo, Rongjie Yang, Yunjun Luo, Jinxian Zhai
Summary: In this study, a new mechanism of modulating the mechanical properties of polyurethane elastomers was uncovered. The extra hydrogen bonding motifs in the cross-linkers were found to determine the stiffness and toughness of the elastomers.
Article
Chemistry, Physical
Haotian Zhao, Qinghong Zhang, Xinlong Wen, Gongliang Wang, Xiaowen Gong, Xinyan Shi
Summary: In this study, a dual covalent cross-linking network was constructed in PNB using TDAE plasticized PNB as the matrix, sulfur and DCP as crosslinking agents. The sulfur-rich cross-linked PNB showed higher mechanical properties and shape memory performance compared to the DCP-rich system, with polysulfide bonds playing a key role in providing flexibility and large deformation capacity.