Materials
·
2025
·Vol. 18
·期 7
·1636
·
IF 3.2
Gudong You,Xi Li,Kaiwen Ren,Tao Ai,Yanhui Niu
Interpenetrating polymer networks (IPNs) are widely used as damping materials across various industries. However, they are susceptible to issues such as microcracking or fracture over long-term service periods. To address these challenges and improve the long-term performance of IPNs, this research focused on designing and synthesizing self-healing polyurethane (PU)/epoxy (EP) interpenetrating networks (PU/EP-IPNs) enhanced with dynamic disulfide bonds. The incorporation of these bonds significantly enhanced the damping and self-healing properties of the materials. The shape memory performance was evaluated, demonstrating high shape fixation rates of up to 95.0% and exceptional shape recovery rates of up to 99.7%. These results indicate the materials’ ability to revert to their original shape upon heating above the glass transition temperature (Tg). In addition, the effective damping temperature range of the material reached 61.4 °C, and the loss factor was 0.859. This indicates that the enhancement of damping performance is closely related to the increase in disulfide bond density. The formation of the IPN between PU and EP also contributed to improved mechanical and thermomechanical properties. These PU/EP-IPNs exhibit significant potential as innovative damping materials with self-healing capabilities.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiang Feng,Yang Pan,Ke Lei,Lanlan Wu,Jiang Li,Jie Zhang,Shaoyun Guo
Polymeric damping materials with a wide temperature or frequency range present significant challenges, especially when used for vibration attenuation at ultra-low temperatures or ultra-high frequencies, as the chain motions are frozen in these extreme environments. In our previous studies, polydimethylsiloxane (PDMS) polymer-fluid-gels (PFGs) dampen vibrations over a relatively wide temperature or frequency range; however, their lower-temperature limit is −55 °C, and their upper-frequency limit is about 150 Hz due to the symmetry and regularity of dimethylsiloxane molecular structure. In this work, the regularity is broken by introducing the second monomers of hexaethylcyclotrisiloxane, and diethyl-modified polydimethylsiloxane (PEMS) PFGs with 20 % diethyls are prepared, breaking through the effective damping limits of ultra-low temperature to −123 °C and ultra-high frequency to 10 10 Hz. Ultra-low temperature (about −120 °C) experiments show that the falling ball impact absorption capacity of the PEMS PFGs is over 2500 % and 1400 % higher than that of commercial silicone rubber (Sylgard 184) and the PDMS PFGs. Ultra-high frequency tests demonstrate that PEMS PFGs can completely attenuate ultrasonic shocks of 40 kHz, while Sylgard 184 and the PDMS PFGs can’t suppress vibrations of such high frequency.
研究领域:
材料科学
·
振动工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qili Yu,Qunfu Fan,Wenzheng Chen,Yujie Chen,Chengzhen Du,Guangqiang Fang,Yuxuan Wu,Hezhou Liu
Shape memory polymers may have the highest potential as materials for aerospace engineering because of their low density, adjustable stiffness, and controlled deformation; however, large shock effects are inevitable during the deformation process of space deployment structures. To overcome the impact of shock vibrations on such complex integrated structures, an innovative interpenetrating polymer network (IPN) preparation scheme through phase distribution adjustment is proposed. In this work, thermally responsive shape memory IPNs consisting of polycaprolactone-based polyurethane (PUPCL) and brominated isobutylene isoprene rubber (BIIR) were reported for the first time. The BIIR/PUPCL (5:5) IPNs exhibited high shape fixity and recovery rates (94.4 % and 89.6 %, respectively) and repeatable shape memory behavior. Furthermore, the IPNs presented a favorable loss factor (tan δ) of 0.60 and exhibited effective damping temperature range (tan δ > 0.3) covering 83.6 K (−43.4 °C to 40.2 °C), resulting in impressive damping properties. Finally, the working process of the hinge was simulated by constructing a layer-by-layer panel with smooth deployment 30 s after heating. In addition, a gripper-shaped module based on bending deformation was successfully fabricated, exhibiting particular energy-loss properties and acting as a shock absorber. This study provides a novel design for the preparation of multifunctional polymers with potential applications in hinges and booms for aerospace engineering and intelligent protective devices.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Yang Han,Hongbing Zheng,Yingxue Liu,Min Wang,Jiadong Wang,Qing Xie,Shuailin Jing,Xuan Qin,Liqun Zhang
Shock-absorbing materials play a vital role in various industrial sectors, including construction and transportation. Among these materials, natural rubber (NR) stands out due to its exceptional elastic and mechanical properties, coupled with its robust crack resistance. Nevertheless, with the rising demand for enhanced damping capacities, there is a need to further optimize the damping performance of NR. One direct approach is to blend it with high-damping rubber. Butyl rubber (IIR) is a prominent member of the high-damping rubber category. Integrating IIR effectively with the NR, however, presents challenges. These challenges arise from IIR’s inherent characteristics, such as its low unsaturation, slower vulcanization rate, and restricted compatibility with NR. Addressing these challenges, our study employed isoprene and isobutene to synthesize a variant of butyl rubber with a higher degree of unsaturation─achieving an unsaturation level between 4 and 6 mol %. Notably, this heightened unsaturation significantly expedited the curing time of IIR and facilitated the concurrent vulcanization of both IIR and NR. Utilizing atomic force microscopy, we observed that the introduction of unsaturated double bonds ameliorated the compatibility between NR and IIR, leading to an interfacial region extending up to 1000 nm. Our tests using a dynamic mechanical analyzer and rubber processing analyzer demonstrated the material’s damping temperature range. Furthermore, there was a noticeable rise in the loss factor (tan δ) at ambient temperature, which remains over 0.1 across both a frequency window of 0.2 to 5 Hz and a strain spectrum of 10 to 200%. This tan δ enhancement ensured the potential of these rubber composites for shock-absorbing 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
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 15
·2213343
·
IF 19
Jiaqi Zheng,Shuang Sun,Xu Hu,Zhaohan Yu,Yue Fu,Dan Chen,Dong Wang,Weihao Cai,Huamin Zhou,Yunming Wang
High-performance damping materials are significant toward reducing vibration and maintaining stability for industrial applications. Herein, a yolk–shell piezoelectric damping mechanism is reported, which can enhance mechanical energy dissipation and improve damping capability. With the addition of yolk–shell particles and carbon nanotube (CNT) conductive network, damping properties of various resin matrices are enhanced with the energy dissipation path of mechanical to electrical to heat energy. Particularly, the peak loss factor of epoxy composites reaches 1.91 and tan δ area increases by 25.72% at 20 °C. The results prove the general applicability of yolk–shell piezoelectric damping mechanism. Besides, the novel damping materials also exhibit excellent flexibility, stretchability, and resilience, offering a promising application toward damping coating, indicating broad scope of application in transportation and sophisticated electronics, etc.
研究领域:
材料科学
·
工程学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 14
·12119-12125
·
IF 3.201
Xiaoyu Shi,Yilong Song,Zhenzhen Cai,Xuesong Wang,Danfeng Cao,Qiuli Cheng,Jiawei Zou,Zuosen Shi,Zhanchen Cui
Liquid viscoelastic polymers are promising materials for vibration damping due to their superior damping properties. However, using liquid polymers as materials for this purpose is challenging because liquid polymers cannot be used as normal materials in their amorphous fluid state. This study reports polyurethane/polyurea (PU/PUA) microcapsules prepared using oil-in-water (O/W) emulsion and interfacial polymerization. The microcapsules were partially filled with silicone oil and used as a damping filler in an epoxy resin specimen. Dynamic mechanical analysis measurements (DMA) were performed to investigate the loss factor tan δ of the epoxy resin blended with the microcapsules. The DMA results indicated that the partially filled structure of the microcapsules could enhance the vibration absorbing property of the epoxy resin specimen, and the maximum loss factor (tan δ) increased from 0.38 to 0.79. The loss factor of the epoxy resin could be controlled by the core volume fraction and the concentration of the microcapsules in the epoxy resin.
研究领域:
材料科学
·
振动工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Tianchen Zhang,Fei Song,Zheng Pan,Baozheng Zhao,Linfeng Tian,Li Tan,Rui Yang,Yijiao Xue,Meng Zhang,Yonghong Zhou
Microcellular polyurethane foam (MPUF) is extensively utilized as a vibration dampening material. However, its long chain and porous composition render it highly susceptible to combustion. Herein, we grafted the flame retardant 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide (DOPO) onto the castor oil by a simple method to obtain a bio-based flame-retardant polyester polyol (COBH). Then, a bio-based flame-retardant MPUF was synthesized by one-pot synthesis of COBH, polyether polyol, and isocyanate. The target MPUF exhibits excellent flame retardancy, with the limiting oxygen index (LOI) sharply increasing from 19.3 % to 27.6 % and the peak of heat release rate (PHRR) decreasing significantly by 60.1 % as compared to MPUF prepared using unmodified castor oil. In addition, the MPUF shows good vibration dampening performance with a maximum loss factor of 5.2 and a maximum S c -factor of 250. Moreover, the MPUF can be processed into MPU film by compression molding. The MPU film has adjustable mechanical properties and reusability. This study provides a feasible method for the preparation of flame-retardant, recyclable, bio-based MPUF with good vibration damping properties, thus expanding the practical applications of MPUF in the automotive, aerospace, and packaging and transportation industries.
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
MACROMOLECULES
·
2025
·
IF 5.2
Xiaoxu Liu,Zilu Liu,Jing Bai,Fei Chen
Dynamic cross-linked polymers have garnered attention due to their recyclable nature. Research on constructing dynamic cross-linked polymers with various dynamic chemical bonds has achieved numerous outstanding outcomes. Nevertheless, studies on mechanisms such as polymer chains’ movement, energy transformation, and dissipation within the dynamic cross-linked network have been relatively scarce, which is the essential determinant for the ambient-temperature usage and high-temperature recycling characteristics of dynamic cross-linked polymers. This research uses the widely studied dynamic imine bonds as a representative to investigate dynamic cross-linked polymers. Through the utilization of rheological tests, the dynamic and static properties were tested and analyzed at the polymer chain level, explaining the mechanical property stability of dynamic cross-linked polymers during ambient-temperature service and the influence of dynamic performance on the energy dissipation mechanism, further clarifying the potential application mechanism in materials such as shock absorption. Simultaneously, it also demonstrated the polymer chain structure basis for their recycling.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Shuping Sun,Xiaodong Li,Hao Jiang,Tinglu Song,Zhongjia Yang,Meishuai Zou
Polyurethane (PU) has a wide range of applications in the field of noise reduction and vibration damping. In order to break through the bottleneck of sound insulation performance of PU, three different kinds of molecular sieves, 3A, 13X, and ZSM-5, with complex pore channels were incorporated into PU through the semi-prepolymer method. The sound insulation properties of PU/molecular sieve composites were obviously improved, especially in the frequency from 1000 to 2000 Hz. The composites also showed enhanced mechanical properties compared with PU. Tensile strengths of up to 15 MPa and elongation at break of 1256.23% were achieved. A slight expansion of the effective damping temperature range was observed. The sound insulation mechanism of PU/molecular sieve composites included fillers increasing the density of PU, microporous channels dissipating sound waves, dissipating energy, and dispersing stress by good compatibility of inorganic and organic phases. The excellent compatibility came from physical and chemical synergies of soft segments perforated molecular sieves as well as the reaction between active groups of PU and acidic sites of molecular sieves. This study provided comprehensive mechanisms and strategies for the enhancement of sound insulation, and more targeted research and application can be conducted in the future.
研究领域:
材料科学
·
声学
·
聚合物复合材料
·
噪声控制工程
✓ 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）