@article{FongChenWongetal., author = {Fong, Mun-Oon and Chen, Xiangping and Wong, Jie-Wei and Lok, Tow-Jie and Li, Siyang and Low, Jia Tee and Nordin, Nur Syahirra and Miao, Zhikun and Hu, Qiannan and Neffe, Axel T. and Wong, Tuck-Whye and Li, Tiefeng and Yang, Wei}, title = {Multifunctional Roles of Iron Oxide Nanoparticles in a Reversible Shape-Memory Composite}, series = {Advanced Functional Materials}, journal = {Advanced Functional Materials}, publisher = {Wiley}, issn = {1616-301X}, doi = {10.1002/adfm.202418409}, pages = {13}, abstract = {The utilization of functional fillers in the development of composite materials has come a long way since its advent to improve physical, chemical, or mechanical properties of the base material. However, the heterogenous roles contributed by a single type of filler remain uncommon in this field. Here the endowment of various modifications to a 1,8-octanediol/1,12-dodecanedioic acid/citric acid (OD/DDA/CA) matrix through the incorporation of iron oxide nanoparticles (IONPs) is reported. Owing to the relaxation and hysteresis loss behaviors of IONPs when exposed to an alternating magnetic field (AMF), the composites demonstrate a magnetothermal response. Similarly, the excitation and relaxation of electrons in IONPs under near-infrared light (NIR) enable photothermic-responsiveness. In combination, two findings nurtured an observed shape-memory effect when the samples are under actuation by these indirect stimuli, where a shape recovery ratio (≥98\%) and reversible strain (≤7\%) are recorded. Moreover, the catalytic role of IONPs aided transesterification in the covalent network, demonstrated by successful repeated cycles of shape reconfiguration of the samples. This work highlights the prospectives of multifunctional composite fillers in the exploration of bio-derived composite smart materials.}, language = {en} } @article{JamaludinNordinLietal., author = {Jamaludin, Farah Hidayah and Nordin, Nur Syahirra and Li, Xinge and Wong, Jie-Wei and Lim, Zhixian and Wang, Lei and Ma, Chunxin and Zhao, Qian and Wong, Tuck-Whye and Neffe, Axel T. and Li, Tiefeng}, title = {Recent Advances in the Field of Shape-Memory Polymer from Bio-Based Precursors: Review and Perspective}, series = {Polymer Reviews}, volume = {65}, journal = {Polymer Reviews}, number = {1}, publisher = {Informa UK Limited}, issn = {1558-3724}, doi = {10.1080/15583724.2024.2427827}, pages = {199 -- 249}, abstract = {Shape-memory polymers (SMPs) are predominantly derived from nonrenewable resources due to their low production cost, wide availability, and refined techniques for processing and tailoring SMP properties. However, the heavy reliance on these nonrenewable resources poses significant concerns regarding resource depletion and the long-term sustainability of the technology. As petroleum-based resources, which have traditionally fueled the polymer industry, become increasingly scarce, it is imperative to develop bio-based SMPs. This shift is essential not just for resource conservation but to ensure the continued viability and sustainability of SMP technology in the face of dwindling petroleum supplies. This review provides an overview of bio-based SMPs, which are synthesized from renewable precursors or through chemical variation and functionalization of biopolymers. The molecular mechanism and design strategy for the shape-memory effect (SME), syntheses, unique characteristics and shape-memory performance for these bio-based SMPs are covered. Furthermore, this review highlights novel insights and proposes promising directions for the development of sustainable SMPs with comparable performance to their nonrenewable counterparts. By focusing on bio-based alternatives, this work aims to motivate the exploration and advancement of next-generation sustainable SMPs.}, language = {en} }