Polymers
·
2017
·Vol. 9
·期 6
·237
·
IF 3.364
Qian Zhao,Wenhua Hou,Yunhong Liang,Zhihui Zhang,Luquan Ren
A novel kind of graphene oxide (GO)-containing bilayer hydrogel system with excellent self-healing and detachment properties stimulated by near-infrared irradiation is successively fabricated via a two-step in situ free radical polymerization. In addition to high mechanical strength, as components of a bilayer hydrogel system, a polyN,N-dimethylacrylamide (PDMAA) layer with 3 mg/mL GO and a polyN-isopropylacrylamide (PNIPAm) layer with 3 mg/mL GO exhibits firm interface bonding. GO in a PDMAA layer transforms under a near-infrared laser into heat, which promotes mutual diffusion of hydrogen bonds and realizes a self-healing property. The irradiation of near infrared laser results in the temperature of PNIPAm layer being higher than the volume phase transition temperature, reducing the corresponding biological viscidity and achieving detachment property. The increase of GO content enhances the self-healing degree and detachment rate. The bilayer hydrogel system fabricated via mold design combines characteristics of PDMAA layer and PNIPAm layer, which can be treated as materials for medical dressings, soft actuators, and robots.Keywords:bilayer hydrogel system;self-healing degree;detachment rate;photothermal energy transformation efficiency
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Mengqing Zhou,Dengdeng Xie,Keqing Zhou,Kaili Gong,Lian Yin,Xiaodong Qian,Congling Shi
As we all known, the problems of easy leakage, poor thermal conductivity and high flammability will hinder the application of phase change materials for energy storage. In this work, a novel multifunctional composite phase change material was prepared via efficient modifications, which has preeminent flame retardancy and shape stability to achieve safe and efficient storage of heat and light energy . As expected, the composite phase change material had excellent thermal energy storage density (163.9 J/g), even the melting enthalpy ratio could reach 91.1%. In comparison with pure PEG , the thermal conductivity has realized improvement as well, and the shape stability of composite phase change materials was significantly promoted, which could be heated at 80 °C for 1 h without the leakage of PEG. In addition, it showed excellent thermal stability and fire resistance, the maximum decomposition rate and the peak heat release rate were decreased by 47% and 34.1%, respectively, compared with pure PEG. More importantly, composite phase change materials realized the storage of light energy on the basis of thermal energy management and utilization, which could absorb and store ultraviolet and visible light during the day, and then release fluorescence slowly for a long time in the dark. To sum up, neoteric multifunctional composite phase change materials have enormous prospects for safe and efficient application in the fields of solar energy acquisition, thermal and light energy storage and thermal management.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Xingyun Ye,Yingjiao Ma,Zhuoyue Tian,Hanxue Sun,Zhaoqi Zhu,Jiyan Li,Weidong Liang,An Li
Photothermal energy conversion and storage though phase change materials (PCMs) composites is one of the ideal methods for the efficient utilization of solar energy which is regarded as the cleanest and most sustainable renewable energy. Herein, a series of Ti 3 C 2 -introduced PCMs composites were developed by melt-dipping method exploiting MXene/sodium alginate/carbon nanotubes (CNTs) hybrid aerogels as supporting materials and tetradecylamine (TDA) as the impregnated PCM. The utilization of MXene is to enhance the light absorption performance of PCM composites which has significantly improved their absorbance under an extremely high loading rate exceeding 91.0 wt%. This result contributed to a high photothermal energy conversion efficiency up to 84.95% and an excellent thermal energy storage density with a relatively high latent heat up to 217.8 kJ/kg. Notably, the hybrid TDA/aerogel composites also exhibited remarkable cycling and crystallinity stability; their melting enthalpy still maintain up to 192.0 kJ/kg after 300th thermal and cooling cycles. Additionally, the obtained PCM composites also possess marvelous mechanical property and enhanced thermal conductivity . The excellent comprehensive performance demonstrated that the resultant composites show great potential application in solar energy conversion and storage.
研究领域:
材料科学
·
能源工程
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
Energy Materials
·
2022
·Vol. 2
·期 4
·N
·
IF 0
Liqi Dong,Fei Zhai,Hui Wang,Cong Peng,Yiyu Feng,Wei Feng
Azo photoswitches capture ambient heat and light, opening new possibilities for efficient thermal energy conversion, thus enhancing renewable energy utilization.
研究领域:
物理化学
·
材料科学
·
能源化学
·
光功能材料
·
热能存储
✓ 已验证
DOI
MOLECULES
·
2025
·Vol. 30
·期 11
·2333
·
IF 4.6
Shuxin Tang,Yating Zhang,Jun Xia,Jing Qi,Fan Tang,Fei Zhai,Liqi Dong
The development of photoactive molecules for photothermal energy storage is a focus of research in solar energy utilization technology. Azobenzene photoswitch has emerged as a promising candidate for solar energy conversion and storage due to its unique photoisomerization characteristics. Nonetheless, a majority of azobenzene-based molecular photothermal systems have a significant drawback: they depend on ultraviolet light forE-to-Zisomerization to store photon energy rather than visible light, which seriously hinders the development of azobenzene photoswitch in practical solar energy utilization applications. In this study, an azobenzene photothermal molecule that can effectively store visible-light photon energy was design and synthesized, which includes atetra-ortho-chlorinated azo structure as the “head” part and an alkyl chain atpara-position as the “tail” part. The ultraviolet–visible and1H NMR spectrum indicated that the obtainedtetra-ortho-chlorinated azobenzene photothermal molecule could effectively absorb and store photon energy under 550 nm irradiation and release the stored energy upon 430 nm light irradiation. The storage energy density of the charged azobenzene photothermal molecule was determined to be 13.50 kJ/mol through differential scanning calorimetry and 28.21 kJ/mol via density functional theory theoretical calculations. This discrepancy was ascribed to the 64% Z-isomer yield harvesting during the charging process. Furthermore, the obtainedtetra-ortho-chlorinated azobenzene exhibited long-term energy storage (approximately 11 days of half-life) and cyclic stability (100 cycles). Notably, theE-isomer oftetra-ortho-chlorinated azobenzene exhibited a high degree of supercooling, which may be advantageous for use in extremely low-temperature environments.
研究领域:
太阳能材料
·
光化学
·
储能技术
·
有机合成
·
热能转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Rihui Liang,Maoxin Zhang,Teng Qiu,Bo Yuan,Cong Peng,Wei Feng
Azo-based photoswitchable molecules can undergo configurational transformations by tuning the wavelength of incident light, thereby enabling efficient energy storage. Polymer-based solid–solid phase change materials are capable of storing and releasing thermal energy through surroundings temperature regulation without experiencing macroscopic morphological changes. There is growing interest in constructing hybrid systems that enable synergistic collection and release of energy in thermal management systems. Herein, a series of meta -azopyridine compounds with electron-donating and electron-withdrawing groups are synthesized, the azopyridine derivative with the highest energy density can reach up to 312 J g −1 . Meanwhile, polyethylene glycol is employed as the phase change component to synthesize solid–solid phase change polyurethanes featuring robust mechanical properties and favorable shape stability. Most importantly, a flexible energy-storage device is innovatively integrated employs the above-mentioned two systems, capable of coharvesting photon and phase change energy reaching up to 388 J g −1 . The temperature regulation capability of the devices through the storage and release of photothermal and phase change energy is demonstrated as a thermal-insulation material, showing potential application in external thermal-insulation aspects for transport pipelines.
研究领域:
材料科学
·
能量存储
·
高分子科学
·
光化学
·
热管理
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Bing Cao,Jian Zhang,Yingfei Ma,Yanan Wang,Yun li,Ruixue Wang,Donghai Cao,Yongzhen Yang,Ruiping Zhang
Periodontitis is the leading cause of adult tooth missing. Thorny bacterial biofilm and high reactive oxygen species (ROS) levels in tissue are key elements for the periodontitis process. It is meaningful to develop an advanced therapeutic system with sequential antibacterial/ antioxidant ability to meet the overall goals of periodontitis therapy. Herein, a dual-polymer functionalized melanin-AgNPs (P/D-MNP-Ag) with biofilm penetration, hydroxyapatite binding, and sequentially treatment ability are fabricated. Polymer enriched with 2-(Dimethylamino)ethyl methacrylate (D), can be protonated in an acid environment with enhanced positive charge, promoting penetration in biofilm. The other polymer is rich in phosphate group (P) and can chelate Ca 2+ , promoting the polymer to adhere to the hydroxyapatite surface. Melanin has good ROS scavenging and photothermal abilities, after in situ reduction Ag, melanin-AgNPs composite has sequentially transitioned between antibacterial and antioxidative ability due to heat and acid accelerated Ag + release. The released Ag + and heat have synergistic antibacterial effects for bacterial killing. With Ag + consumption, the antioxidant ability of MNP recovers to scavenge ROS in the inflammatory area. When applied in the periodontitis model, P/D-MNP-Ag has good therapeutical effects to ablate biofilm, relieve inflammation state, and reduce alveolar bone loss. P/D-MNP-Ag with sequential treatment ability provides a reference for developing advanced oral biofilm eradication systems.
研究领域:
材料科学
·
纳米技术
·
牙科科学
·
生物医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2021
·
IF 9.594
Jingyi Zhang,Lei Shu,Chao Chang,Xiaoxiang Li,Ruiming Lin,Benwei Fu,Chengyi Song,Wen Shang,Peng Tao,Tao Deng
Direct absorption of sunlight with carbon nanofluids is a facile way to efficiently harvest solar-thermal energy, but poor dispersion stability of nanofluids under elevated temperatures severely limits their applications. Herein, we report a general strategy to prepare stably-dispersed medium-temperature solar-thermal nanofluids by employing crumpled particles of ethanol-wetted graphene oxide sheets as the self-dispersible photothermal converters. The crumpled particles simultaneously possess intensively-deformed surface structure, a low density and a small particle size. Such features weaken the inter-particle van der Waals attraction and gravitational sedimentation of the crumpled particles, thereby enabling their long-term stable dispersion within commercial thermal storage oils. Uniform dispersion of nanofluids was maintained after continuous heating for 2 weeks under a heating temperature up to 200 °C. The homogenously dispersed nanofluids also achieved high solar absorptance with low particle loadings, and retained the large heat capacity and suitable viscosity. These combined advantageous thermophysical properties enabled consistent high-performance medium-temperature direct absorption-based nanofluidic solar-thermal energy harvesting under large-flux solar illumination.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xin Zhang,Lishan Chen,Chao Zhang,Liqiong Liao
Light-driven hydrogel actuators show potential applications because their spatiotemporal precision and contact-free manner, especially for near-infrared light (NIR), can be focused on a specific area, which possesses tunable intensity and strong penetrability. Herein, we propose a novel NIR-responsive hydrogel actuator incorporating Fe3+/tannic acid (Fe3+/TA) as a photothermal transducer into the poly(N-isopropylacrylamide) (PNIPAAm) hydrogel via photo-cross-linking and subsequent immersion in FeCl3 solution. TA contains abundant pyrogallol and catechol groups, which can be linked to PNIPAAm through hydrogen bonds during in situ polymerization; moreover, as a mediator, TA can form metal-phenolic networks with Fe3+ via the coordination between catechol and metal ions, endowing the PNIPAAm gel with enhanced mechanical properties as well as NIR-responsive photothermal effect. We demonstrated that introduction of Fe3+/TA maintained the volume phase transition temperature of the hydrogel around 32 °C and guaranteed its deformation behaviors upon NIR irradiation. Furthermore, a higher concentration level of BIS and Fe3+ were verified to facilitate a stronger photothermal capacity of the hydrogels. Therefore, under NIR irradiation, Fe3+/TA within the hydrogel converted NIR light into heat, and the local high temperature in the irradiated region would cause the petals of the “snowflake”-shaped hydrogel to bend upward perpendicular to the horizontal plane within 1 min, possessing excellent repeatability. This study puts forward a new idea of preparing NIR-responsive hydrogel actuators based on Fe3+/TA, which show promising application in the fields of biomimetic devices, flowing control, and soft robotics.
研究领域:
材料科学
·
机器人技术
·
仿生设备
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin Liu,Shikai Wang,Jinghao Cao,Jiahui Yu,Jixian Dong,Yutong Zhao,Fuping Zhao,Dafeng Zhang,Xipeng Pu
Rational design of the morphology and heterojunction to accelerate the separation of electron-hole pairs has played an indispensable role in improving the photocatalytic hydrogen evolution . ZnIn 2 S 4 (ZIS) has aroused considerable attention in solar-to-chemical energy conversion due to its remarkable photoelectrical properties and relatively negative energy band, whereas it still suffers from the severe photogenerated carrier recombination and catalyst aggregation. Herein, guided by density functional theory calculations, the constructed FeSe 2 @ZnIn 2 S 4 (FS@ZIS) heterojunction model has a hydrogen Gibbs free energy closer to zero compared with pure ZIS and FS, which is beneficial for hydrogen adsorption and desorption on the photocatalyst surface. Therefore, a novel cross-like core–shell FS@ZIS Step-scheme (S-scheme) heterojunction was synthesized successfully by in-situ growing ZIS nanosheets on the surface of cross-like FS. The structure with cross-like core–shell morphology not only inhibits the agglomeration of ZIS to increase specific surface area , but also provides a tight interface with S-scheme heterojunction. Moreover, the S-scheme heterojunction with a tight interface can effectively separate electron-hole pairs, leaving photoinduced charges with higher potentials. Furthermore, FS@ZIS-20 possesses exceptional photothermal capabilities, enabling the conversion of optical energy from visible and near infrared light to heat, thereby further enhancing the photocatalysis reaction. As a result, the cross-like core–shell FS@ZIS S-scheme heterojunction exhibits an excellent photocatalytic hydrogen evolution rate (7.640 mmol g −1 h −1 ), which is 24 times higher than that of pure ZIS (0.319 mmol g −1 h −1 ) under visible and near infrared light. Furthermore, employing more in-depth density functional theory calculations further investigates the charge transfer pathway of the FS@ZIS S-scheme heterojunction. This work provides insights into the construction of S-scheme heterojunctions with core–shell structure and photothermal effect for photocatalytic evolution hydrogen.
研究领域:
材料科学
·
光催化
·
纳米技术
·
能源转换
·
理论化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Regenerative Biomaterials
·
2023
·
IF 6.7
Peng Chen,Zeng Xiaodie,Cai Jiali,Huang Hanyu,Yang Fang,Jin Shaowen,Guan Xiuhong,Wang Zhiyong
Triple-negative breast cancer is a highly aggressive and metastatic tumor; diagnosing it in the early stages is still difficult, and the prognosis for conventional radio-chemotherapy and immunotreatment is not promising due to cancer’s immunosuppressive microenvironment. The utilization of protein-based nanosystem has proven to be effective in delivering agents with limited adverse effects, yet the combination of diagnosis and treatment remains a difficult challenge. This research took advantage of natural albumin and organic molecules to construct a self-assemble core-shell nanostructure combining with superparamagnetic iron oxide nanocrystals and heptamethine cyanine dye IR780 through non-covalent interactions. This nanocomposite successfully decreased the transverse relaxation time of the magnetic resonance hydrogen nucleus, resulting in outstanding T2 imaging, as well as emitting near-infrared II fluorescence, thereby the resulting dual-modality imaging tool was applied to improve diagnostic competency. It is noteworthy that the nanocomposites exhibited impressive enzyme-like catalytic and photothermal capabilities, resulting in a successful activation of the immune system to efficiently suppress distant metastatic lesions in vivo. Consequently, this nanodrug-based therapy could be an advantageous asset in reinforcing the immune system and hindering the growth and reappearance of the immune-cold breast cancer.
研究领域:
癌症生物学
·
纳米技术
·
成像科学
·
治疗学
·
免疫学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Qianqian Qiao,Zerui Liu,Fei Hu,Ziqiang Xu,Ying Kuang,Cao Li
Catalytic medicine, using enzymes or nanozymes, is an emerging method for cancer treatment. However, its applicability is limited by the low catalytic activity in the tumor microenvironment (TME). In this work, a versatile and synthesis-friendly nanozyme, CeO 2 Mn 1.08 O x nanoclusters, is prepared. This novel Ce─Mn heterojunction is formed by oxidation of CeO 2 nanoparticles through H 2 SO 4 /KMnO 4 . CeO 2 Mn 1.08 O x exhibits high multi-enzymatic catalytic activities and acts as a catalase (CAT), peroxidase (POD), and oxidase (OXD) mimics under acidic conditions. It can regulate the TME by relieving hypoxia and consuming endogenous glutathione (GSH). Glucose oxidase (GOx) is then incorporated into CeO 2 Mn 1.08 O x and linked with poly(ethylene glycol) (PEG) to obtain the cascade enzyme system (Ce─Mn)-PEI/GOx-PEG. CeO 2 Mn 1.08 O x exhibits CAT-like properties, which sensitize GOx-based starvation therapy, and POD- and OXD-like properties, which generate highly cytotoxic reactive oxygen species (ROS) in cancer cells. The glucose catabolic product, H 2 O 2 , is also used to generate O 2 and ROS. In addition, the heterojunction structure provides CeO 2 Mn 1.08 O x with near-infrared (NIR) photothermal capability, making it suitable for photothermal therapy (PTT). Density functional theory (DFT) calculations provide possible reasons for the high catalytic activity and photothermal capability of CeO 2 Mn 1.08 O x . When combining mild PTT with catalytic therapy, the cascade enzyme system (Ce─Mn)-PEI/GOx-PEG can efficiently ablate tumors.
研究领域:
癌症研究
·
纳米技术
·
生物医学工程
·
诊疗学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）