ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Mengyao He,Chunyu Ding,Xue Tian,Xiaotian Zhang,Neng Qian,Yangyi Sun,Dongming Qi
Homeostatic microfiber leathers with temperature self-regulation promise broad applications, ranging from the apparel and automotive interior industries to the home furnishing and healthcare industries. Temperature self-regulation is achieved by phase-change materials containing microcapsules introduced within the leathers. The introduction of phase change microcapsules (PCMs) into microfiber leather faces two formidable challenges: (1) the shell of microcapsules must remain chemically stable against alkalis and organic solvents; (2) PCMs possess the ability to reduce supercooling during which latent heat is released, allowing for the precise and controllable release of latent heat. Here we present a high-performance homeostatic microfiber-composed synthetic leather containing PCMs that can address these two challenges, which not only demonstrate exceptional chemical robustness under alkaline conditions but also offer efficient and precise control over temperature fluctuation and latent heat release by reducing supercooling. Titanium carbide (TiC) known for its high thermal conductivity and alkali resistance has been selected as the shell material for the microcapsules, which can effectively resolve chemical stability issues. Meanwhile, the high thermal conductivity of TiC can be leveraged to enhance heterogeneous nucleation, thus narrowing the temperature range for latent heat release. The resultant microfiber leather shows outstanding capabilities for adjustable thermal energy storage. Our studies offer an effective approach to create homeostatic microfiber-composed synthetic leathers with chemical robustness and undercooling self-regulation, which would be useful in the fields of the textile, biomedical, and healthcare industries.
研究领域:
材料科学
·
纺织工程
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Dan-Na Hu,Xiao-Jie Ju,Xing-Qun Pu,Rui Xie,Wei Wang,Zhuang Liu,Liang-Yin Chu
Self-regulating insulin controlled-release systems have gained more attention due to their advantages of timely response to blood glucose change and avoiding side effects caused by the high-frequency injection. In this paper, the temperature-responsive monomer N-isopropylacrylamide (NIPAM) and glucose-responsive monomer 3-acrylamidophenylboronic acid (AAPBA) are copolymerized and then grafted with alginate to prepare temperature/glucose dual-responsive copolymers alginate-g-P(NIPAM-co-AAPBA) (Alg-g-PNA). The temperature and glucose responsiveness under different conditions, rheological characteristics, glucose-mediated insulin release, and biotoxicity of the Alg-g-PNA copolymers are studied. The results show that the copolymer solution is in the sol state at 10 °C and insulin can be dispersed uniformly, while it turns into the gel state when the temperature rises to physiological 37 °C for in situ delivery of insulin. Due to the sensitivity to blood glucose levels, the hydrogels can quickly respond to the increase in blood glucose and undergo the gel-to-sol transition and release insulin to reduce blood glucose when the environmental blood glucose rises. Moreover, the hydrogels have good sol–gel transition reversibility in response to changes between normoglycemic and hyperglycemic levels. The cell cytotoxicity results show that the hydrogels have good biocompatibility to be a safe carrier for insulin delivery. The proposed injectable temperature/glucose dual-responsive hydrogels in this study provide a novel type of self-regulating insulin delivery systems for diabetes therapy.
研究领域:
生物材料
·
糖尿病治疗
·
高分子化学
·
药剂学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Fanhao Kong,Liping Sun,Lihua Huo,Hui Zhao
Developing bifunctional electrocatalyst with low-cost, high-activity, and durability towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is the key for large-scale hydrogen production . In this paper, a novel one-dimensional amorphous nickel molybdenum phosphate nanoarray (NiMoPO x ) is prepared on nickel foam via two-step reations. NiMoPO x exhibits excellent electrocatalytic activity than the state of the art Pt/C and RuO 2 . For overall water splitting reaction, NiMoPO x electrode couple achieves 1.55 V at 10 mA cm −2 for prolonged 50 h operation in 1.0 M KOH. The excellent bifunctional electrocatalytic properties come from the in-situ electrochemical surface self-tuning of NiMoPO x “precatalyst”. During the self-tuning process, the surface of amorphous NiMoPO x is in-situ transformed to metallic Ni and Ni(OH) 2 nanoparticles under HER and OER, leading to the formation of special heterostructure hybrid materials . Further investigations indicate that the in-situ produced metallic Ni nanoparticles favor the generatation of adsorbed H atom in water dissociation, therefore enhance the hydrogen evolution kinetics and activity. Meanwhile the in-situ formed Ni(OH) 2 nanoparticles become the actual surficial species to promote oxygen evolution reaction. This self-tuning method provides a new idea to develop high-performance electrocatalysts for some sustainable energy conversion systems, such as water splitting and metal-air batteries .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Na Li,Miao Wang,Chaohui Yuan,Xiaoqing Ma,Wei Zhao,Xinyi Zhang,Yuqi Meng,Yuqian Fan,Shengxue Yu
In this work, Zn anode with a high compatibility to seawater system is fabricated on stainless steel mesh using an ultra-simple in-system synthesis technique. Physical characterizations reveal that the film electrode is composed by cross-linked Zn nanoflakes structure with outstanding adhesion and mechanical deformation tolerance. Being adopted as seawater-compatible anode, the as-synthesized Zn electrode exhibits a high reversible capacity of 30 mAh cm −2 with obvious advantages such as outstanding rate capability, strong tolerance to real-time varied current, low capacity decay, and good long-term cycling stability. The assembled Zn-air battery performs a maximum energy density of 285 Wh m −2 and successfully lights up various electronic devices. Furthermore, the self-regulation working mechanism and the growth kinetic of Zn electrode are further investigated using in-situ optical microscopy observations and in-situ electrochemical impedance spectroscopy (EIS) techniques. This work demonstrates a promising feasibility for fabricating highly reversible and low-cost Zn electrode in seawater system aiming to large-scale energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Huawen Liu,Junbin Liao,Yan Zhao,Arcadio Sotto,Jiajie Zhu,Bart van der Bruggen,Congjie Gao,Jiangnan Shen
Self-regulation of membrane permeability performance is highly desirable for porous membrane applications. Inspired by the stomatal closure behaviour of plant leaves in response to environmental changes, here we report a series of dual thermo- and pH-responsive membranes based on the poly(4-vinyl pyridine) (P4VP) core/poly(N-isopropylacrylaminde) (PNIPAM) shell microgels. The stimuli-responsive microgels underwent in situ surface segregation and uniformly decorated on the surface of internal channels during the phase inversion process. The hydraulic permeability performance of the dual responsive membranes (DRMs) has been investigated within a temperature range of 20–50 °C and a wide pH range (spanning pH 2–6). The water flux of optimized membrane (M2) varied from 1.94 kg m −2 h −1 at 20 °C/pH 2–474.91 kg m −2 h −1 at 50 °C/pH 6 with a high gating ratio of 245. Investigations revealed that microgels based on different thickness of PNIPAM shell conferred different thermo-/pH-responsive properties to the DRMs. For example, the thicker PNIPAM shell enhanced the thermo-response performance, while the pH-response performance was restrained. These optimum smart gating membranes with enhanced gating coefficient and reversibility are potential for the applications in water gating and controlled release systems.
研究领域:
材料科学
·
环境科学
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 24
·2302891
·
IF 15.1
Jiahui Huang,Zhenchuan Yu,Peiyi Wu
Shaping soft and conductive materials into sophisticated architectures through 3D printing is driving innovation in myriad applications, such as robotic counterparts that emulate the synergic functions of biological systems. Although recently developed multi-material 3D printing has enabled on-demand creation of intricate artificial counterparts from a wide range of functional viscoelastic materials. However, directly achieving complementary functionalities in one ink design remains largely unexplored, given the issues of printability and synergy among ink components. In this study, an easily accessible and self-regulating tricomponent ionogel-based ink design to address these challenges is reported. The resultant 3D printed objects, based on the same component but with varying ratios of ink formulations, exhibit distinct yet complementary properties. For example, their Young's modulus can differ by three orders of magnitude, and some structures are rigid while others are ductile and viscous. A theoretical model is also employed for predicting and controlling the printing resolution. By integrating complementary functionalities, one further demonstrates a representative bioinspired prototype of spiderweb, which mimics the sophisticated structure and multiple functions of a natural spiderweb, even working and camouflaging underwater. This ink design strategy greatly extends the material choice and can provide valuable guidance in constructing diverse artificial systems by 3D printing.
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
Nanoscale
·
2025
·
IF 5.1
Jingxuan Li,Jiaqi Miao,Alan Cheng Hou Tsang
Self-regulated actuators harness material intelligence to enable complex deformations and dynamics, representing a significant advancement in automated soft robotics. However, investigations on self-regulated soft actuators, particularly those using simplified actuation modules such as unidirectional light beam, remain limited. Here, we present a design paradigm for self-regulated actuators based on Poly(N-isopropylacrylamide) (PNIPAM) heterogeneous hydrogel, where self-regulated deformations are actuated by a fixed near-infrared laser. By utilizing the different responsiveness of PNIPAM hydrogels and those integrated with reduced graphene oxide (rGO), we develop three heterogeneous hydrogel configurations: up-down, side-by-side, and hybrid. These designs enable complex biomimetic deformations in soft hydrogel actuators, resembling a bending finger or a flexible industrial manipulator, all actuated by a single fixed laser source. These proposed heterogeneous designs and actuation strategies leverage material intelligence to create soft actuators with enhanced autonomy, paving the way for soft automation, adaptive systems, and biomedical applications.
研究领域:
材料科学
·
软体机器人
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 23
·11695-11711
·
IF 11.301
Youchao Teng,Jing Wei,Hongbiao Du,Mansoorianfar Mojtaba,Dagang Li
A solar and thermal multi-sensing all-solid-state microfiber supercapacitor (ASSMFSC) with prominent electrochemical and mechanical performance, reliable environmental responsivity, and intelligent self-conditioned capacitance was constructed using a cellulose nanofibril-graphene-conjugated polymer, which was assembled as both a core-sheath microfiber electrode (CSMFE) and a sensing unit. The multicomponent hierarchical synergistic design fully exploited the unique attributes and synergistic interaction of each component to endow the well-designed CSMFE with high capacitance and mechanical robustness as well as excellent thermal sensitivity and photothermal conversion, enabling the valid modulation of redox reactions, interface performance, or electronic/ionic transfer in the microfiber supercapacitors toward complex external stimulations and building interrelated working responses. The fabricated ASSMFSC presented a total volumetric capacitance of 85.8 mF cm−3 (vs. the whole device), excellent cycle stability, and a volumetric energy density of 11.9 mW h cm−3. Moreover, ASSMFSC showed excellent solar-thermal conversion capacitance enhancement. At one solar power density (1 kW m−2), the capacitance was two times that of the device in the dark and the device exhibited self-regulation capacitance ability with the change in the solar intensity. As a thermosensitive device, ASSMFSC with a current sensitivity of 0.47437 ± 0.00549 °C displayed a fast response and excellent reproducibility to sense subtle temperature changes. This work demonstrates that the CSMFE-driven microfiber supercapacitor can be used as a photothermal conversion energy storage system and for body temperature monitoring, which provides an essential reference and optimistic incentives for new generation energy-related devices.
研究领域:
材料科学
·
能源存储
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2019
·Vol. 66
·期 1
·e16753
·
IF 3.463
Gang Li,Shanhong Ma,He Yang,Shuanshi Fan,Xuemei Lang,Yanhong Wang,Wentao Li,Yuanzhi Liu,Liang Zhou
The transport behaviors and nanochannel structures of a graphene oxide (GO) membrane were studied for pervaporation dehydration of bio-oil with a high acidity and a complex composition. The GO membrane showed an unprecedentedly stable water flux of approximately 0.43 kg m −2 hr −1 , with a water content of 97 wt% in the permeate throughout 70 hr of pervaporation testing at 30°C. Both the calculated activation energy for water permeation and X-ray diffraction characterization results confirmed that the nanochannel structures of the GO membrane were temperature- and liquid media-responsive. The molecular intercalation-induced self-regulation of the size of laminar nanochannels in the GO membrane was suggested to be primarily responsible for the significantly reduced membrane fouling and the exceptionally stable pervaporation performance for the GO membrane. The mechanistic insights into the nanochannel structures and antifouling properties would provide important inspiration for the design of novel highly fouling-resistant membrane materials for practical applications.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 30
·16384-16394
·
IF 12.732
Guang Liu,Yu Feng,Tiandong Zhang,Changhai Zhang,Qingguo Chi,Yongquan Zhang,Yue Zhang,Qingquan Lei
As a key component of the dielectric capacitor, the dielectric material directly determines the performance of the capacitor. Poly(vinylidene fluoride) (PVDF) has received extensive attention for its large dielectric constant. However, PVDF has poor temperature resistance and cannot be used in high-temperature areas. In this work, a symmetrical sandwich structure was prepared by compounding polycarbonate (PC) and PVDF, in which PC has higher insulation and heat resistance than PVDF. It was found that as the temperature increases, the applied electric field would gradually concentrate on the PC layer, while the electric field borne by the PVDF layer gets much lower. In this way, a similarity-intelligent dielectric with the performance of self-adjusting electric field distribution was obtained, which can effectively avoid premature breakdown of PVDF under high-temperature conditions. Besides, when the PC is on the outside (CFC), it can not only increase the difficulty of carrier injection at the electrode, but also improve the heat resistance of the composite dielectric, and interface charge generated by this structure can effectively trap the carriers injected at the electrode. Finally, CFC-2 has excellent temperature stability and energy storage performance; it can withstand a breakdown strength of 500 MV m−1 even at 100 °C, and its energy storage density (6.35 J cm−3) and charge–discharge efficiency (77.21%) are 93.52% and 91.31% of room temperature, respectively. This work effectively improves the high-temperature energy storage characteristics of PVDF and broadens its application fields. Thus, improving the high-temperature energy storage characteristics of polymer dielectrics is of great significance.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 34
·e54311
·
IF 3
Aimei Yu,Ying Xi,Weigang Xu,Ao Wang,Lin Liu,Lin Zhang
In this study, three kinds of newly flexible positive temperature coefficient (PTC) materials are fabricated by a simple preparation method. Due to introducing the hybrid filler of carbon nanotube and carbon black, these materials exhibit remarkable PTC effect including the PTC intensity of more than four-orders magnitude and the resistivity-temperature coefficient of 154%/°C. The Curie points of PTC materials are regulated to room-temperature range by the low melting phase and influenced by melting onset temperatures of their solid–liquid phase change. With the help of transmission electron microscope, the micro-capsule structure of the phase change regions is observed, and the hybrid conductive fillers randomly distribute in the blend matrix to construct three-dimensional conductive network. Using the PTC materials as a heating element, the equilibrium temperature of the controlled device can be maintained around their Curie point without any control method. Moreover, the adaptive thermal control effect becomes more obvious with the increase of ambient temperature and initial heating power. Furthermore, the thermal control accuracy fluctuates within 0.15°C without any external control method, and is improved to round 0.08°C in combination with the switch control method. This study provides a new method for the thermal control of electronic devices in the requirement of lightweight and miniaturization at low temperature environment.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuexi Zheng,Zhiguo Ye,Xinyuan Peng,Shaojie Zhuang,Duosheng Li,Zhong Jin
Oxygen evolution reaction (OER) electrocatalysts in acidic media, except for precious IrO 2 , have difficulty realizing good electrocatalytic activity and high electrochemical stability simultaneously. However, the scarcity of IrO 2 as an acidic OER electrocatalyst impedes its large-scale application in hydrogen generation, organic synthesis, nonferrous metal production and sewage disposal. Herein, we report the design and fabrication of a nanoporous TiMnCoCN compound based on the nanoscale Kirkendall effect, possessing an intriguing self-adjusting capability for the oxygen evolution reaction (OER) in a 0.5 M H 2 SO 4 solution. The nanoporous TiMnCoCN compound electrode for the acidic OER displays a low overpotential of 143 mV for 10 mA cm −2 and exhibits no increase in potential over 50,000 s, which is ascribed to the self-adjusting ability, Carbon/nitrogen (C/N) incorporation and nanoporous architecture. The concentration of inert TiO 2 on the reconstructed surface of the compound can self-adjust with the change in OER potential via a cobalt-dissolved vacancy approach according to the stabilization requirement. In this work, the self-reconstruction law of surface structure was discovered, providing a novel strategy for designing and fabricating nonnoble OER electrocatalysts with superior catalytic performance and robust stability in acidic media.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）