NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 45
·期 2
·772-779
·
IF 3.288
Kuo Liu,Qingyuan Peng,Ziwei Li,Jingzhen Cheng,Li Lao,Xing Li,Zuocai Zhang,Shaorong Lu,Yuqi Li
Developing polylactic acid (PLA) shape-memory films with excellent mechanical and thermal properties is essential for applying PLA in the shape-memory materials field. In this study, a series of perylene-bisimide-functionalized graphene nanosheet (PBI–GN)/PLA shape-memory films were successfully prepared by electrospinning. The effects of PBI–GNs on the mechanical, thermal, and shape-memory properties of the PLA nanofiber films were systematically studied. Results showed that with a 9 wt% content of PBI–GNs, the thermal stability of the composite film significantly improved, and the tensile strength and elongation at break increased by 346% and 11.1%, respectively, compared with those of the neat PLA nanofiber film. Moreover, at this percentage of PBI–GNs, the composite film exhibited the maximum shape recovery of 92.3%, which was 36.3% higher than that of the neat film. After five thermomechanical test cycles, the ratio decreased by only 3.7%.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Wu Wang,Tianjiao Cai,Zhongjun Cheng,Yuqi Yang,Jingfeng Wang,Jianxin Tang,Li Tang,Wen Feng,Yuyan Liu,Zhimin Fan
Stimulus-responsive MXene films demonstrate extensive application scenarios, such as artificial muscles and biomedical devices. However, the shape deformation of such materials entails continuous stimulation, thus limiting their implementation in specific fields when temporary shapes have to be maintained without external stimuli. This work fabricates a kind of shape-programmable MXene-based supermolecular nanocomposite film by integrating MXene and polyvinyl alcohol. In this film, MXene provides extra intermolecular hydrogen bond interaction between polyvinyl alcohol and acts as cross-linking points in the nanocomposite, thus endowing this film with a good shape-fixing property. Furthermore, with the osmotic plasticization of water on the polyvinyl alcohol chains, the as-prepared nanocomposite film demonstrates excellent water-responsive shape-memory performance. This material cannot only overcome the inability of traditional stimulus-responsive MXene films to maintain temporary structures without continuous stimulation, but also expands potential applications in some fields including controlled release and intelligent bio-robots.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 4
·1159-1168
·
IF 3.2
Fangjuan Wu,Jiahuan Hu,Shangda Yang,Guifeng Li,Haoxiang Chen,Hui Fang
Shape memory blends of polycaprolactone/thermoplastic polyurethane (PCL/TPU) were prepared by in situ ring-opening polymerization (ROP) of ε-caprolactone (CL) and thermoplastic polyurethane (TPU). Fourier infrared spectrometer and 1 H-NMR were used to characterize the chemical structure of PCL/TPU copolymers. The results show that TPU has been involved in the ROP of CL, leading to the formation of copolymers with homogeneous morphologies. Besides, pure PCL and all the blends exhibit an excellent shape fixation ratio of 100%, due to their high crystallinity. When a small amount of TPU is introduced, the crystallinity of PCL decreases, and as a result, the shape recovery ratio of the copolymer is enhanced compared with pure PCL. However, with the increased loading of TPU, the content of PCL as the reversible phase decreases and the storage modulus of the PCL/TPU blend declines, so the driving force for the blends to return from the temporary shape to the initial shape becomes smaller, leading to a decrease in the shape recovery ratio. Notably, when the amount of TPU is only 5%, the shape recovery ratio of the blend could reach 83.3%, which is 26% higher than that of pure PCL, and meanwhile, the tensile strength of the blend decreases slightly. This study provides a new strategy for the design of shape-memory materials with high shape-memory properties.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
·
2016
·
IF 0
Yan Ou Hu,Hui Qin Lian,Lei Zu,Yue Ting Li,Yang Liu,Xiu Guo Cui,Zhong Kai Hu,Yan Hua Jiang,Lei Wang,Yu Peng Liu,Ben Ze Wu
Ionic polyurethane (IPU) was synthesized as shape memory materials. Poly (tetramethylene ether) glycol with 2000g/mol number average molecular weight were used as soft segment, 4,4-methylenebis (phenyl isocyanate), and 1,2-dihydroxy-3-propanesulfonic acid salt were used to compose the segment of SMP materials. The structure and properties of these IPU films were characterized by Fourier Transform infrared, X-ray diffraction, Thermal gravimetric analysis and Differential scanning calorimeter. The results showed that the glass transition temperature of the IPU increased with the increase of hard segment content. The physical properties in terms of swelling property, water absorption and ion-exchange capacity increased with the improving of sulfonic group content in IPU. The shape memory property of IPU exhibited that the shape fixity ratio and recovery rate improved remarkably with the increase of hard segment content.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
Smart Materials and Structures
·
2021
·Vol. 30
·期 11
·115017
·
IF 3.585
Leiming Fan,Xinliang Mei,Juan Zhang,Jiaxing Zhu,Xingsheng Wang,Yanchun Li,Wei Cai
Shape memory polymers are attractive smart materials that have many promising applications in a wide variety of fields. Here the multi-walled carbon nanotube (MWCNT) was used to adjust the performance of crosslinked poly(vinyl alcohol) (PVA), which had acetal reaction with glutaraldehyde (GA). The thermal degradation, mechanical strength and shape recovery properties of PVA/MWCNT/GA membranes were investigated by thermogravimetry, differential scanning calorimetry, x-ray scattering, dynamic mechanical analysis, tensile test and thermal-stimulus shape memory recovery measurements. The MWCNT embedded in the crosslinked PVA matrix accelerated the breaking of C–O bonds. The mechanical strength and shape recovery properties of PVA/MWCNT/GA composites were tunable. As the MWCNT loading increase in crosslinked PVA matrix, the yield strength increased from 3.85 MPa to 10.21 MPa, breaking elongation decreased from 230% to 50%, the 100% shape recovery time decreased from 27 s to 16 s, respectively.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Shiling Mu,Yaqiong Zhang,Jiangjun Zhou,Baoxia Wang,Zhongkai Wang
The development of sustainable epoxy resins from renewable biomass is gaining more and more attention. In most cases, chemically cross-linked biomass-derived epoxy resins are nonrecyclable. Here, mechanically strong and recyclable epoxy resins from palm oil that possess reconfigurable shape memory properties are developed. By converting palm oil-based methyl methacrylate monomers into epoxy monomers, high molecular weight palm oil-based epoxy polymers (EP) are prepared with high conversion. After being cured with citric acid (CA) without using any catalyst, palm oil-based epoxy resins (EP-CA) cross-linked with β-hydroxyl ester groups are obtained. The EP-CA can rearrange the chemical network topology through transesterification reactions, which endows the materials with the ability to be recycled and reshaped. The EP-CA prepared via the epoxy polymer approach contains a well-defined network structure, resulting in remarkable mechanical properties. Moreover, the dynamic network structure allows the EP-CA samples to possess reconfigurable shape memory properties.
研究领域:
材料科学
·
可持续化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yuluo Zheng,Jianming Lin,Jiaxin Cai,Qi Mo,Shuya Zhang,Xiyue Wang,Beiwei Wang,Yafei Qin,Lijie Huang
In this paper, poly(lactic acid) (PLA)/thermoplastic polyurethane (TPU) binary blend composites were prepared by a melt blending method using PLA as the substrate and TPU as the toughening component, to which carbon nanotubes (CNT) were added, and PLA/TPU/CNT shape memory composites with light-responsive and heat-responsive shape memory properties were prepared. The mechanical properties, micro-morphology, light-responsive, and heat-responsive shape memory properties of the prepared composites were investigated. The results showed that the toughening effect of thermoplastic polyurethane was best when the ratio of PLA to TPU was 8:2, based on which the light-converting particle CNT was added to prepare the light- and heat-responsive PLA/TPU/CNT ternary composites. The better the dispersion of CNT, the better the mechanical properties, stiffness, and shape memory properties of the composite. When the CNT content is 3 wt%, the shape memory performance is the best, and the composite has fast-response optical and thermal shape memory properties and high recovery ability, which can reach 100% under continuous light and heating conditions. Based on the composites, opto-thermal responsive smart packaging boxes and flower-shaped series–parallel integrated switch models were designed, expanding the applications of composites in the fields of smart packaging materials and electronic devices.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pan Guo,Weili Gu,Junyu Lu,Keying Zhang,Fei Liu,Hongzhi Liu,Nan Sheng,Chunyu Zhu
The deployment of phase change materials (PCMs) presents a viable strategy for enhancing solar energy conversion and storage, providing a continuous thermal energy generation process in line with carbon neutrality objectives. Through the modification of carbon felts (CF) with polydopamine (PDA) and subsequent controlled integration of Cu nanoparticles, this study achieved the development of flexible phase change composites (FPCCs) for enhanced solar thermal energy conversion and storage, incorporating thermally-driven shape memory and spatial adaptability. Notably, the CF/PDA/Cu/PW variant demonstrated a thermal conductivity of 1.43 W m −1 K −1 , marking a 680 % enhancement relative to pure paraffin wax (PW), with an energy storage density of 171.3 J/g. Moreover, these composites exhibited rapid responsiveness, near-complete thermal shape recovery, and maintained stable solar-to-thermal conversion efficiency and shape stability. These findings suggest the potential of these FPCCs for utilization in solar thermal energy systems, as well as in thermal management under spatial and shape constraints.
研究领域:
能源材料
·
太阳能技术
·
复合材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Jinhao Huang,Weifeng Liu,Xueqing Qiu
For the first time, the coordination-based energy sacrificial bonds have been constructed in the interface between lignin and polyolefin elastomer for preparing a new class of high performance thermoplastic elastomers (TPEs) with biomass lignin as the hard plastic phase. The coordination bonds not only promoted the dispersion of lignin, but also improved the interfacial interactions between lignin and polyolefin elastomer matrix, and also facilitated the orientation of chain segments during stretching. The synergistic coordination effect of lignin promoted higher energy dissipation, leading to simultaneously enhanced strength and toughness of lignin-based TPEs even with the lignin loading as high as 30 wt %. The lignin-based TPEs also exhibited excellent shape memory performance. Our strategy offers a promising methodology for the facile production of high performance but cost-effective TPE materials using biorenewable resources as plastic phase.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 9
·7130-7137
·
IF 3.201
Lulu Pan,Zhongqiang Xiong,Laifu Song,Jianfeng Ban,Shaorong Lu
In this paper, a thermo-responsive network shape-memory polymer (SMP) which has high elasticity, triple shape-memory properties and rapid shape recovery effects was reported. This new type of shape-memory polyurethane network (denoted SF-SMPs) was successfully synthesized by chemically cross-linking cellulose sisal fibre (SF) with polycaprolactone (PCL). The structures, morphology, and shape-memory properties of the SF-SMPs have been carefully investigated. The results demonstrate that the SF-SMPs form micro-phase separation structures consisting of a semi-crystalline PCL soft phase and an amorphous hard phase. Different contents of polyester sisal fibre (PSF) influence the crystallinity of the PCL soft phases. The cross-linking structures provided a stable network, high elasticity and good thermal stability to the SF-SMPs. Thus, all of the SF-SMPs exhibited triple shape-memory properties, and recover to the original shape immediately. Especially, the sample with the lowest content of PSF (P1) exhibited high (over 91%) shape fixity and 90% shape recovery. The first step of strain recovery is associated with the melting transition of soft segment crystals of the polyurethane matrix, and the second step of strain recovery results from the glass transition of the hard segment. This work demonstrates new cellulose cross-linking structures of SMPs, which will have many applications in future smart science.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yongkang Bai,Jiwen Zhang,Xin Chen
A multiresponsive shape memory composite was prepared by incorporating polyaniline (PAn) fibers into polyvinyl alcohol (PVA), where in situ polymerization assisted by surfactant was used to homogeneously disperse PAn fibers in a PVA matrix. The PAn fibers not only increased physical cross-linking points in the system but also served as photothermal conversion reagents, resulting in excellent water-, thermal-, and near-infrared (NIR) light-induced shape memory properties of the composites, where their light-induced shape recovery ratio and speed could be enhanced via the increase of PAn loading percentage and light power density. Moreover, the composites possessed high mechanical properties with tensile strength over 83 MPa. On the basis of these dramatic mechanical properties and shape memory properties, the composites could show high recovery stress over 6.0 MPa, which increased with the increase of temperature and PAn loading percentage. This presented composite could be a great candidate as actuator element for various applications.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Shunli Liu,Fang Yao,Olayinka Oderinde,Kewen Li,Hongjiao Wang,Zhihong Zhang,Guodong Fu
Bio-inspired by the hierarchical structure and remarkable mechanical properties of natural nacre, nacre-like N-succinyl chitosan (NSC)-graphene oxide (GO) composite film was fabricated via zinc ion cross-linking and evaporation process. NSC and GO were used as the building “mortar and bricks,” which rapidly self-assembled into composite hydrogel (NSC/GO-Zn) via zinc ions cross-linking, and the hierarchical NSC/GO-Zn composite film was obtained thereafter by evaporation. A series of NSC/GO-Zn composite films with different GO concentrations was fabricated with the layered structure, as confirmed by scanning electron microscopy. Zinc ion-enhanced hierarchical NSC/GO-Zn composite film exhibited remarkable mechanical properties (strength of 212.6 ± 10.1 MPa and toughness of 2.51 ± 0.08 MJ·m −3 ). Unique shape memory response to alcohols was demonstrated by the composite film due to the presence of the chitosan, which has a significant ability to desorb/absorb water. Furthermore, a remarkable broad-spectrum bactericidal property of the NSC/GO-Zn composite film was observed through E. coli and S. aureus exposure. These features indicated that NSC/GO-Zn composite film has inherent properties that can be used in protection, aerospace, and biological materials.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）