JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2012
·Vol. 50
·期 10
·2053-2067
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IF 3.919
Yan-Ling Luo,Wei Yu,Feng Xu,Li-Li Zhang
A novel double brush-shaped copolymer with amphiphilic polyacrylate- b -poly(ethylene glycol)- b -poly acrylate copolymer (PA- b -PEG- b -PA) as a backbone and thermosensitive poly( N -isopropylacrylamide) (PNIPAM) long side chains at both ends of the PEG was synthesized via an atom transfer radical polymerization (ATRP) route, and the structure was confirmed by FTIR, 1 H NMR, and SEC. The thermosensitive self-assembly behavior was examined via UV-vis, TEM, DLS, and surface tension measurements, etc. The self-assembled micelles, with low critical solution temperatures (LCST) of 34–38 ° C, form irregular fusiform and/or spherical morphologies with single, double, and petaling cores in aqueous solution at room temperature, while above the LCST the micelles took on more regular and smooth spherical shapes with diameter ranges from 45 to 100 nm. The micelle exhibits high stabilities even in simulated physiological media, with low critical micellization concentration (CMC) up to 5.50, 4.89, and 5.05 mg L −1 in aqueous solution, pH 1.4 and 7.4 PBS solutions, respectively. The TEM and DLS determination reveled that the copolymer micelle had broad size distribution below its LCST while it produces narrow and homogeneous size above the LCST. The cytotoxicity was investigated by MTT assays to elucidate the application potential of the as-prepared block polymer brushes as drug controlled release vehicles. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
研究领域:
高分子化学
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材料科学
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药物递送
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Hongyan Huang,Yong Wen,Yi Huang,Fang Guo,Quanpei Xie,Chaohai Sun,Jinxin Liu,Si Cheng
Although several separation membranes for the purification of dye-containing oily wastewater have been reported, achieving continuous one-step separation and photodegradation of complex oil/water effluents containing dyes is still a significant challenge. In previous studies, the purification of oil/water mixtures has typically involved a two-step process involving the initial separation of oil/water mixtures followed by the subsequent photodegradation of organic dyes. This is because one-step purification requires the membrane to concurrently possess an excellent separation efficiency and photodegradation ability to ensure efficient degradation of dyes as they rapidly pass through the separation membrane. Herein, we propose a photothermally responsive poly(N-isopropylacrylamide)-MXene/polyacrylonitrile-poly(N-isopropylacrylamide) nanofibrous hydrogel membrane (PNIPAm-MXene/PAN-PNIPAm, PMPP membrane). The PMPP membrane is composed of a PNIPAm-MXene hydrogel bonded to the surface of a PAN-PNIPAm nanofibrous membrane. The PNIPAm-MXene hydrogel layer imparts excellent photothermally responsive wettability, photodegradation activity, and antifouling properties to the membrane. The PAN-PNIPAm nanofibrous membrane provides a porous structure that ensures the highly efficient separation of complex oil/water mixtures. The PMPP membrane achieves simultaneous one-step separation and photodegradation of complex oil/water effluents under light irradiation, particularly in the case of multiphase heavy oil/water/light oil mixtures containing both oily and water-soluble organic dyes and oil–water emulsions. The degradation and separation efficiencies of the PMPP membrane exceed 99.5%. Even after 20 cycles, the degradation rates of Sudan IV and methyl blue (MB) remain above 95.7 and 99.9%, respectively.
研究领域:
环境科学
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材料科学
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产品关联
DOI
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
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软体机器人
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
·
IF 3.172
Ge Liu,Dan Hu,Min Chen,Changchun Wang,Limin Wu
Multifunctional PNIPAM/Fe 3 O 4 –ZnS hybrid hollow spheres integrating magnetism, luminescence, and temperature responses into one single entity have been successfully fabricated via a facile method. First, the cross-linked Poly (N-isopropylacrylamide) (PNIPAM) hollow spheres were synthesized via a classical method, named one-pot “self-removing” process. Then, Fe 3 O 4 and ZnS nanoparticles were in situ precipitated on the surface of the PNIPAM hollow spheres. The PNIPAM/Fe 3 O 4 –ZnS hybrid hollow spheres exhibit magnetic property, which indicates the potential application in drug targeting. In addition, ZnS nanoparticles in the shell play an important role as a luminescent label for tracking the drug delivery. Meanwhile, the existence of PNIPAM provides a thermosensitive property. All these results indicate that the obtained composite can be expected to be used as a smart drug delivery material.
研究领域:
材料科学
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生物医学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2025
·
IF 4.9
Xiaowen Wang,Yingnan Gao,Changyou Liu,Yaping Wang,Anqin Liu,Wenguang Yang
Robots have a profound impact on human production and life, which have been developed by leaps and bounds in recent decades. As the higher and higher requirements for operations in complex environments, researchers continue to develop wireless driven miniature robots. In this paper, the ratio and deformation properties of PNIPAM and PEGDA hydrogels were researched, and the microcrawls and microgrippers with 3D structure were prepared through secondary curing technology. They have light stimulus response and magnetic response characteristics, and can be reversibly transformed from 3D to 2D structure to complete crawling and transportation functions. This research offers a reference for the fabrication and programmable actuation of intelligent materials. It holds certain promise in the domains of transportation and bionics.
研究领域:
材料科学
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仿生学
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机器人技术
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产品关联
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Min Shen,Tingting Pan,Juewei Ning,Jiayan Shi,Hongtian Liu,Yanqing Tian
We report on the fabrication of K + fluorescent sensor P2 based on thermoresponsive poly(N-isopropylacrylamide) and small molecule K + fluorescent sensor KS. P2 changed its size with a range from 35 °C to 42 °C and exhibited lower critical solution temperature (LCST) at 38 °C. The LCST affected the polymer’s nanostructures and microenvironment of KS, which in turn affected P2 ’s fluorescence intensities and responses to K + . Furthermore, P2 exhibited high selectivity and sensitivity to K + with a dynamic response range from 1 to 20 mM, enabling its suitableness for extracellular K + analysis. The sensor was further used to in situ monitor the K + fluctuation of Escherichia coli and B. Subtilis 168 bacteria under lysozyme stimulation in 96 well plate by a high throughput analysis approach, and cell species dependent K + release was observed. The PNIPAM-based K + sensor P2 shows potential application in antimicrobial drugs/peptides screening.
研究领域:
生物化学
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分子生物学
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材料科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2015
·Vol. 33
·期 3
·456-464
·
IF 1.835
Xiao Jun-jie,Li Xiu-bing,Wang Xi,Yi Chun-wang,Su Sheng-pei
The effect of temperature-responsive solution behavior of PNIPAM- b -PPEOMA- b -PNIPAM on its inclusion complexation with α -cyclodextrin was studied. The triblock polymer was prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization and formed inclusion complexes (ICs) after selective threading of the PEO segment of the triblock polymer through the cavities of α -CD units. For comparison, PPEOMA homopolymer was prepared and the inclusion complexation with α -CD was also studied. The ICs were prepared with α -CD when the polymer was in different conformations by changing the temperature, and the formed ICs were characterized by XRD, 1 H-NMR, TGA and DSC. The solutions of the ICs show temperature-responsive clear/turbid transition or fluidic emulsion/gel transition depending on the concentration of the α -CD added, and the stoichiometry determined by 1 H-NMR and TGA indicates that the stoichiometry of EO to α -CD of the resulted ICs increases with increasing of temperature.
研究领域:
高分子科学
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材料化学
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物理化学
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产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2025
·
IF 8
Guangxu Ju,Danqian Wang,Yingzi Gu,Weining He,Yiming Niu,Guoxing Sun
Good thermal insulation performance is crucial for the application of cement materials, and reducing thermal conductivity is an effective strategy to enhance thermal insulation performance. Thermosensitive poly-N-isopropylacrylamide (PNIPAM) undergoes a phase transition around its lower critical solution temperature (LCST) of approximately 32 °C, and its incorporation can significantly improve the thermal insulation properties of cement. This study investigates the effects of adding PNIPAM in concentrations ranging from 0.3 % to 1.5 % on the thermal conductivity of cement-based materials at temperatures of 25 °C, 32 °C, and 37 °C. At 37 °C, the thermal conductivity of the cement sample decreased from 1.728 W/m·K to 0.811 W/m·K, representing a substantial reduction of 53.05 %. However, increasing the PNIPAM content also affected the hydration process of the cement mortars, leading to longer initial and final setting times and a slight decrease in both compressive and flexural strength. Additionally, the viscosity of the PNIPAM solution increased the overall viscosity of the cement mortar, resulting in reduced fluidity.
研究领域:
建筑材料学
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热物理
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高分子化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Han Dong,Pu Zhou,Fan Yang,Enhao Zhang,Yifan Liu,Yefei Tian,Hongye Yuan
The development of metal–organic framework (MOF)-based adsorbents with high uptake capacity and mild regeneration conditions represents a promising avenue for addressing environment-based issues. In this study, we present the successful synthesis of temperature-responsive composite aerogels comprising MOF-808 and poly(N-isopropylacrylamide) (PNIPAM), which forms interpenetrated networks with acrylamide (AM). The resulting thermally responsive PNIPAM/MOF-808 composite aerogels achieved an impressive maximum water capture exceeding 2267 wt % at room temperature, with reversible release observed above 32 °C due to the hydrophilicity–hydrophobicity transition of PNIPAM. Interestingly, the aerogels also exhibit an iodine (I2) capacity of 234 wt % based on the charge transfer mechanism. This study provides a novel strategy for the preparation of efficient and reusable porous adsorbent materials, and it also demonstrates broad application prospects in areas such as water resource management and waste reduction.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiahao Zhang,Shengyu Bai,Zhongqi Li,Guanyao Gu,Hucheng Wang,Lai Wei,Xun Sun,Fuzhen Xuan,Xuhong Guo,Yiming Wang
Poly( N -isopropylacrylamide) (PNIPAm) is widely used for smart materials and devices owing to its thermoresponsiveness. Here we demonstrate how PNIPAm can be geared to show reversible phase transition in response to light rather than temperature through a simple signal transformation strategy. This strategy does not require the polymer to be tediously modified with any photoresponsive moieties, offering a new approach towards remote-controlled smart objects. Our concept is achieved using a photoacid and simple PNIPAm-based copolymers. Upon switching on/off light, the photoacid releases/captures a chemical signal which can reversibly change the lower critical solution temperature (LCST) of the copolymers, thereby resulting in a fast (<0.5 min) and reversible phase transition of the copolymer without changing the ambient temperature. Thereon, a series of light-controlled dynamic patterns and conceptually smart soft actuators composed of the copolymers are fabricated. Such a signal transformation strategy enabling PNIPAm photoresponsiveness may boost the development of new non-contact smart objects with adaptive responsiveness.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaolan Liang,Chunzhi Zhang,Ying Yuan,Qiao You,Yunhua Chen,Chaoyang Wang,Tao Wang,Li Zhou,Hongxia Liu
Carbon quantum dots (CQDs) were introduced into hydrogel networks to effectively address the agglomeration issue and impart fluorescence to hydrogels, thereby opening up the use of CQDs in fields such as sensor probes. This study proposed a rapid and straightforward one-step method for preparing fluorescent hydrogels. Fluorescent hydrogels of poly(N-isopropylacrylamide) (C-PN) containing CQDs with intense blue fluorescence were synthesized through ultrasonication and high-temperature reactions. N-Isopropylacrylamide and acrylamide served as monomers, while a hydrogen peroxide–ascorbic acid redox system acted as the initiator. The prepared C-PN hydrogel exhibited its strongest fluorescence emission peak at 410 nm when excited at 340 nm. The C-PN hydrogel demonstrated a specific and sensitive fluorescence response to Fe3+, showing a good linear relationship within the range of 0–100 μM and a low detection limit of 0.09 μM. The relative quantum yield (QY) of C6-PN50 was determined to be 11.6%. With its specific fluorescence response and temperature sensitivity, C-PN has potential applications in self-encryption and multiple decryption processes for information.
研究领域:
材料科学
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化学传感器
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生物医学工程
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Yan Huang,Zhangpeng Li,Kaiming Hou,Shuwen Liu,Qiulong Gao,Xiaonan Miao,Jinqing Wang,Shengrong Yang
In this study, a polydopamine (PDA)-modified MXene-PNIPAM (pMP) hydrogel is prepared using a soap-free emulsion polymerization method, which shows enhanced anti-oxidative, photo-thermal, and tribological properties. The introduction of PDA not only inhibits the oxidation of MXene but also enhances the photo-thermal conversion efficiency of the hydrogel. Even after 50 days, it can still maintain good photo-thermal conversion performance. Moreover, compared with PNIPAM hydrogel, the friction coefficient (COF) and wear volume of pMP hydrogel as lubricant were reduced by 33% and 85%, respectively. Interestingly, the control of COF with excellent reversibility and durability is achieved using pMP hydrogel modulated by near-infrared light. The pMP composite hydrogel exhibits promising prospects in the fields of intelligent robots and biomedical devices.
研究领域:
材料科学
·
智能材料
·
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）