INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Xiaoyun Xu,Zhuang Wang,Qi Zhang,Ke Zhang,Min Li,Jieqiong Yang,Yi Zhao,Qinfei Ke,Qingbao Guan,Jinlian Hu
Fabricating shape-memory materials from natural macromolecules has gained popularity to facilitate the development of bio-friendly smart materials and devices. However, current biobased shape-memory materials have shortcomings, including insufficient mechanical properties and low shape recovery rate in their real applications. Herein, this work aims to develop hierarchically structured keratin-based fibers with high strength and shape-memory properties in response to hydration. The gold nanoparticle is adopted for enhancement in the keratin system, and a well-aligned anisotropic structure with α-helix to the fiber axis is established in the regenerated keratin fibers by wet spinning. The strong crosslinking effect from Au S bonding endows the keratin fibers with outstanding shape-memory performance, exhibiting a shape fixity of ~92 % and a near-full shape recovery rate of ~96 %. In this system, the transition between α and β conformation under external force and water stimulation is assigned as the fundamental mechanism in response to hydration. In hydration and dehydration, the hydrogen bonds act as ‘switches’ that enable deformation, while the strong Au S bonds are ‘net points’ to maintain the original and temporary shapes. This strategy can promote metal nanomaterial anchoring as a methodology for fabricating shape-memory protein-based fibers with excellent mechanical properties and shape-memory performance.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Pigment & Resin Technology
·
2024
·
IF 1.3
Yi xuan Zhang,Shi Xu,Hongyu Gao,Yubing Dong
PurposeThe purpose of this study is to improve the mechanical properties of PBAT. Polybutylene adipate terephthalate (PBAT) has excellent biodegradability, which has been widely used in various fields, such as biomedical supplies, plastic packaging materials, industrial composting and daily sanitary consumables. However, the application of PBAT is limited by its high production costs and poor mechanical property. In this study, the glass fiber (GF)/PBAT composites were prepared, and the effect of GF and the modifiers on the structure, mechanical properties and shape memory properties of the composites were investigated.Design/methodology/approachIn this work, GF, 3-aminopropyltriethoxysilane (KH550) and chain extender ADR 4370 were selected as reinforcement, GF and chain extender, respectively. The GF/PBAT, KH550-modified GF/PBAT and ADR-modified GF/PBAT composites were prepared by melt blending, extrusion granulation and hot pressing.FindingsThe study showed that the fracture strength and elongation at break of PBAT decreased with the increasing of GF, and the decline is controlled after addition of KH550 and ADR 3470. When the GF content was low (such as 5 wt% and 10 wt%), KH550 significantly improved the mechanical properties of the composites. When the GF content was high (such as 20 wt% and 25 wt%), the mechanical properties of the composites were obviously improved by addition of ADR 3470. In addition, the shape memory fixity ratios (Rf) and shape memory recovery ratios (Rr) of the composites increased and decreased with increase of GF content, the prestrain and tensile temperature, respectively. Furthermore, the Rf of the KH550 modified GF/PBAT composites were the lowest, the Rr were the highest than that of the ADR modified GF/PBAT composites and the untreated GF/PBAT composites.Research limitations/implicationsGF/PBAT composites exhibited good mechanical properties and low production costs. The research can help promote the widespread use of PBAT and alleviate the situation of serious plastic pollution.Originality/valueA novel biodegradable GF/PBAT composite was developed by chain extender ADR 4370, incorporating environmentally friendly GF with excellent mechanical properties into PBAT.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 39
·49158
·
IF 2.52
Yanyang Han,Haimei Wang,Xiuling Jiao,Dairong Chen
Poly(vinyl alcohol) (PVA) networks cross-linked by inorganic nanofillers-boehmite (AlOOH) nanowires via strong hydrogen bonding was prepared by a facile strategy. These PVA-AlOOH composites displayed significantly enhanced mechanical and thermal properties due to the excellent mechanical property and high heat resistant of AlOOH nanowires, as well as the strong hydrogen bonding formed between PVA and AlOOH. Interestingly, it was worth mentioning that the PVA-AlOOH composites exhibited excellent shape memory behavior. The strong hydrogen bonding between PVA matrix and AlOOH nanowires acted as the hard segments to maintain the permanent shape, while the weak one between PVA chains served as switching segments to fix the temporary shape and recover to the permanent shape. This physical cross-linked system provided a simple and efficient strategy to obtain smart shape memory materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yiyuan Sun,Zenghui Yang,Liming Tao,Qihua Wang,Xinrui Zhang,Yaoming Zhang,Tingmei Wang
It remains a challenge to balance the trade-off between toughness, stiffness, and shape memory properties in shape memory epoxy resins (SMEP). In this study, we employed molecular engineering to synthesize stiff–flexible SMEP, by reacting furan-containing epoxy monomers 2,5-bis[(2-epoxymethoxy)methyl]furan (BOF), derived from biomass, with amines containing imine-amine (IA) and 4,4′-dithiodiphenylamine (4-DTDA). The results indicate that the sacrificial hydrogen bonding and the necessary flexible segments confer BOF/4-DTDA/IA (BDI) with a toughness of up to 13.9 MJ/m3 and a stiffness of 3.5 GPa. Furthermore, the introduction of hyperbranched epoxy resin (HER) yields BOF/4-DTDA/IA/HER (BDIH), which maintains a stiffness exceeding 2 GPa while retaining a toughness of 11.2 MJ/m3. Additionally, BDIH exhibits enhanced tensile strength with an increasing strain rate, which we rationalize based on the loss modulus and scanning electron microscopy morphology analyses. The collaborative motion of the rigid–flexible chain segments and the hydrogen bonding contributes to BDI’s excellent shape memory performance (shape fixation ratio (Rf = 99.00%) and shape recovery ratio (Rr = 99.15%). The physical barrier effect and flexibility of the HER further enhance the shape memory properties. In conclusion, the mechanical features and shape memory performance of BDI and BDIH demonstrate the significant potential for applications in smart molds, smart devices, and other advanced technologies.
研究领域:
材料科学
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分子工程学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Hongjun Xu,Jianqiang Pan,Changbiao Chen,Songmei Zhao,Jiahao Xiao,Hui Wang,Xinxing Wu,Shuaibo Han,Yan Zhang,Fangli Sun
To improve the reactivity and compatibility of lignin, it was first functionalized via the method of epoxidation. The epoxidized lignin (LEP) modified epoxy resin with good mechanical and shape memory performance was fabricated ingeniously by introducing the LEP into the epoxy resin homogeneously with the aid of synergistic dispersion and crosslinking of polyetheramine without using organic solvents. The effect of LEP addition on the curing reaction, thermal, mechanical, and shape memory performance of epoxy resin were intensively evaluated. The epoxy-diamine curing reaction was promoted by the LEP incorporation, and the thermal stability and mechanical performance of epoxy resin were improved. The tensile strength and modulus of the LEP-modified epoxy were increased by 14.3% and 32.5%, respectively. Such reinforcing effect of LEP on the thermal and mechanical performance was contributed to the rigid LEP chains which were chemically crosslinked into the network of epoxy resin uniformly. Also, the rigid LEP component in the cured epoxy resin inhibited the movement of chain segments, which could enhance the mechanical stability and slow down the rapid shape recovery rate of the epoxy resin network to some extent.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2016
·Vol. 8
·期 7
·236
·
IF 2.944
Yueting Li,Huiqin Lian,Yanou Hu,Wei Chang,Xiuguo Cui,Yang Liu
Conventional shape memory polymers suffer the drawbacks of low thermal stability, low strength, and low shape recovery speed. In this study, main-chain liquid crystalline polyurethane (LCPU) that contains polar groups was synthesized. Graphene oxide (GO)/LCPU composite was fabricated using the solution casting method. The tensile strength of GO/LCPU was 1.78 times that of neat LCPU. In addition, shape recovery speed was extensively improved. The average recovery rate of sample with 20 wt % GO loading was 9.2°/s, much faster than that of LCPU of 2.6°/s. The enhancement in mechanical property and shape memory behavior could be attributed to the structure of LCPU and GO, which enhanced the interfacial interactions between GO and LCPU.Keywords:graphene oxide;liquid crystalline polyurethane;composites;shape memory property
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2018
·
IF 3.741
Yechang Feng,Yang Hu,Limin Man,Teng Yuan,Chaoqun Zhang,Zhuohong Yang
Shape memory polymers play an increasingly significant role in the fields of electronics, aerospace and medical science. However, the most of shape memory polymers are derived from petroleum resource nowadays. Herein, biobased thiol-epoxy shape memory network was obtained from gallic acid-based thiol and diglycidyl ether of bisphenol A (DGEBA). The resulting network shows good shape memory performance with the shape-fixity ratio of 98.7%, shape-recovery ratio of 97.7% and excellent cycle stability, which is comparable to the petroleum counterparts. Further, epoxidized vegetable oils were incorporated into the above thiol-epoxy network to investigate the effect of epoxidized vegetable oils on the properties of the resulting networks. After introducing the vegetable oils, shape-fixity ratios show irrelevance with the network structures and keep above 96%. Shape-recovery ratio declines with the increase of epoxidized linseed oil (ELO) contents, but when ELO content equals to 20 wt% of DGEBA, shape-recovery speed enhances compared to the network without epoxidized vegetable oils. This is the first attempt to fabricate the thiol-epoxy shape memory networks from renewable biomasses.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2015
·Vol. 51
·期 5
·2727-2738
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IF 2.371
Wu Xiwen,Liu Libin,Fang Wenyuan,Qiao Congde,Li Tianduo
Abstract In this work, we synthesized two kinds of polyurethanes with azobenzene as hard segments in the side chains and in the main chains. Their thermal stabilities were high enough for their shape memory application. For polyurethane with azobenzene in the side chain (PU), the azobenzene has more distinctly effect on inhibiting crystallization of polycaprolactone (PCL) because of irregular orientation of azobenzene. For polyurethane with azobenzene in the main chain (PUR), the crystallinity of PCL is mainly affected by its molecular weight. PU-3500 and PUR-3500 exhibit perfect shape fixing ability of 99 % with recovery ratio of 98 % at 50 % strain. The recovery ratio is decreased for PU-3500 and increased for PUR-3500 as the applied strain increased. The mechanism of the hard segment structures effect on the shape memory behavior is briefly discussed. Importantly, the two molecules behave trans–cis isomerization under UV irradiation. This work is crucially important for the structural design of shape memory polyurethane and applications in the smart devices. Graphical Abstract
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Li Wang,Xiaohu Chen,Xiyang Zeng,Kun Luo,Shiyi Zhou,Peicong Zhang,Junfeng Li
Degradable scaffolds with high porosity, certain mechanical and shape memory properties and biocompatibility are ideal materials in the field of bone tissue engineering for minimally invasive surgical implantation methods. In this study, we prepared porous scaffolds using hydrophilic polyethylene glycol and degradable polycaprolactone as raw materials and calcium citrate/amorphous calcium phosphate as hybrid particles, via sequential gas foaming, salt leaching and freeze drying methods. The fabricated bone scaffold exhibited adjustable mechanical properties and pore structure , with high shape fixation (>94.5%) and shape recovery (>87%) in thermal cycling and excellent shape memory properties under simulated body fluid immersion near body temperature. Moreover, in cell proliferation and live/dead cell activity assay experiments, the scaffolds promoted the proliferation of mesenchymal stem cells (MSCs). Immunofluorescence staining assay experiments further showed that the scaffolds had strong expressions of human type Ⅰ collagen (Col I) and alkaline phosphatase (ALP) in bone matrix. The material is expected to be a potential alternative material for bone tissue engineering.
研究领域:
生物材料学
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组织工程学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Materials Science
·
2020
·Vol. 14
·期 2
·177-187
·
IF 1.747
Zhang Lan,Lin Zhaohua,Zhou Qiang,Ma Suqian,Liang Yunhong,Zhang Zhihui
Polylactic acid (PLA) is one of the most promising shape memory polymers with outstanding biocompatibility, while poly(ether ether ketone) (PEEK) is a special engineering plastic with excellent mechanical performance. In this work, PEEK was selected to modify PLA, and a series of PLA blended with different PEEK contents (PLA/PEEK blends) were obtained. The effects of PEEK on thermodynamic, mechanical and shape memory properties of PLA/PEEK blends were investigated. The results showed that the thermal stability of the PLA/PEEK blend was improved with the PEEK content increase. The tensile strength reached the highest value of 20.6 MPa when the PEEK content was 10%. While the best shape memory performance occurred with the PEEK content of 15%, the shape recovery time was less than 2 s, and the shape fixation/recovery ratio was more than 99%. Furthermore, the programmable mimetic flower opening process was achieved by using PLA/PEEK blends with different PEEK content ratios. The above results indicated that the blend of an appropriate proportion of PEEK had positive effects on mechanical and deformation performances of PLA.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Smart Materials and Structures
·
2025
·Vol. 34
·期 3
·035063
·
IF 3.8
Bin Xue,Shu Huang,Hang Zhang,Youqing Zhang,Zhengqi Qian,Jie Sheng,Junhui Zhang,Emmanuel Agyenim-Boateng,Mingliang Zhu
In order to address the limitations of traditional acoustic metamaterials in sound absorption selectivity as well as their inadequate flexibility and adaptability for noise reduction, a honeycomb-thin-film acoustic absorbing metamaterial was developed in this study via 4D printing. By incorporating soft magnetic particles, the structure was enabled to obtain a remote magnetic response, thereby facilitating adaptive sound absorption capabilities. The mechanical properties, shape memory characteristics, and sound absorption performance of both the matrix material and the printed structure were independently evaluated and analyzed. The results indicated that the shape memory polymer containing 10 wt% Fe3O4 exhibited exceptional properties, with a shape fixation rate of 100%, and a shape recovery rate of 97%; the honeycomb-thin-film structure could revert to its original shape within 120 s. The tuning ranges for the two absorption frequencies (sound insulation and sound absorption) were determined to be 68 Hz and 53 Hz, respectively. This study introduces a novel approach to the development of smart acoustic materials with adaptive sound absorption properties.
研究领域:
材料科学
·
声学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Daquan Wang,Zuoliang Zhang,Xin Xu,Yao Qiu,Gang Chang,Kaiyun Yuan,Ruqing Xu,Lingjie Meng
The widespread application of epoxy resins in thermosetting materials is limited by inadequate flame retardancy and recyclability. This study reports the synthesis of a bio-based, hexafunctional star-shaped epoxy cyclotriphosphazene (NEP) via nucleophilic substitution and oxidation of hexachlorocyclotriphosphazene and eugenol. An intrinsically flame-retardant epoxy vitrimer (EV/NEP) was subsequently prepared, exhibiting superior mechanical properties, heat resistance, and thermal stability. Incorporation of 9 mol % NEP significantly enhanced flame retardancy, increasing the limiting oxygen index (LOI) to 26.2 % while reducing peak heat release rate (PHRR) and total smoke release (TSR) by 24.9 % and 35.4 %, respectively. Flame retardancy mechanisms were elucidated in both solid and gas phases. Recyclability was confirmed through solvent recovery and thermal compression experiments. Dynamic ester bonds conferred excellent shape memory properties to EV/NEP. The combination of flame retardancy and recyclability makes this epoxy vitrimer a promising candidate for aerospace and automotive applications.
研究领域:
材料科学
·
化学工程
✓ 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）