CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yuye Zhu,Mengdi Liu,Min Chen,Limin Wu
Traditional photo-responsive self-healing coatings derived from UV-response mechanisms may not be ideal strategies, since UV irradiation often causes undesired damage to coating macromolecular matrices. Herein, we first offer a novel strategy to conduct a blue light-responsive microsphere-based system for autonomous self-healing coatings, in which photo-responsive units containing backbones of polymer shell enable to generate free radicals under blue light irradiation. After the resulting free radicals are irreversibly consumed by encapsulated polymerization inhibitor, this system can release healing agent through microsphere collapses under a milder condition, which is universal to different matrices and promotes the development of photo-responsive self-healing coatings towards weak stimulations and autonomous self-healing.
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 Materials & Interfaces
·
2020
·
IF 8.758
Wei Li,Xingxing Ni,Xinhai Zhang,Yang Lei,Jie Guo,Jie Jin,Bo You
Self-healing superhydrophobic coatings are attracting interest, but it still remains a great challenge to develop facile and fast self-healing strategies for superhydrophobic coatings. In this work, a novel environmentally friendly self-healing superhydrophobic coating based on an ultraviolet (UV)/near-infrared light (NIR) dual-responsive action was fabricated by blending UV-responsive microcapsules with NIR-responsive carbon nanoparticles (NPs), hydrophobic silica NPs, and waterborne silicone latex. The UV-responsive microcapsules were simply prepared through the electrostatic adsorption of negatively charged TiO2 NPs onto a positively charged microcapsule surface. The UV–NIR dual-responsive properties were mainly reflected in the healing of the superhydrophobic property for coatings through NIR or UV light irradiation. The self-healing process could be repeated many times, which can be attributed to the continued release of fluorine silane (FAS-13) loaded in the UV-responsive microcapsules to the coating surface. The combinations of NIR and UV responses endow the coating with the characteristics of fast healing and large-area healing when damaged by the external environment. In addition, the self-healing superhydrophobic coating film has excellent oil, corrosion, and wear resistance, satisfying the requirements for realistic outdoor applications.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2018
·Vol. 53
·期 1
·211-226
·
IF 1.706
Li Yingying,Gao Likun,Li Jian
This study reports on a photoresponsive wood prepared by entrapping phosphomolybdic acid (PMA) into a mixture of chitin/polyvinyl pyrrolidone (CS/PVP), which is anchored on the wood surface. A well-dispersed mixed matrix membrane was examined by SEM, and the change of surface morphology was measured by AFM. Colorimetric parameters of the samples under visible light irradiation were investigated. With the irradiation time increasing from 0 to 90 min, total color change of the sample remarkably increased from 0.7 to 42.5, verifying an excellent photoresponsive property. The interaction between the PMA particles and CS/PVP blend was investigated by using FTIR. Furthermore, the results of UV–Vis and XPS spectra revealed that the photoreduction reaction occurred, and the heteropoly blues were formed during the process of irradiation. The coating adhesion and thermal stability results demonstrated that the coating was firmly adhered to the wood substrate, and the as-prepared sample had a better heat resistance performance than the pristine wood. Owing to the superior sensitivity, accurate response and environmental protection, the future of the photoresponsive wood with visible light response looks bright with many promising application areas such as sensor, smart home and solar energy conversion.
研究领域:
材料科学
·
林业工程
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2025
·
IF 3.9
Dachuan Zhang,Ni Yang,Yang Zhou,Haomin Yu,Jingning Cao,Minghao Wang,Si Wu
Photoresponsive gels exhibit various applications because they can change their structures and properties under the stimulation of light. However, the use of photoresponsive gels is limited by solvent evaporation, which compromises their longevity and functionality. Herein, we design a metallopolymer organogel to overcome this challenge. The organo-gel incorporates metal-ligand coordination bonds as reversible, photoswitchable crosslinks within a polyacrylamide network, using high-boiling-point 1,2-propanediol as the solvent. This system exhibits excellent stability against solvent loss and displays fully reversible and photoresponsive behaviors, including gel-to-sol transitions, color change and volumetric expansion/contraction. We use these properties to demonstrate rewritable photopatterning and shape reconfiguration. We also demonstrate that the organogel maintains low solvent evaporation and stable performance even under hightemperature conditions. The metallopolymer organogel design opens avenues for the development of long-lasting, intelligent soft matter for use in demanding applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yu Liu,Jian Zheng,Zhijia Zhu,Zhangmi Huang,Chunyan Hu,Baojiang Liu
Although the presence of the built-in electric field will solve the problem of carrier complexation in photocatalytic systems to some extent. However, free carriers will quickly shield the stabilized electric field and lose its effect. Therefore, how to introduce the dynamic piezoelectric field into the photocatalytic system has become an imminent problem. Herein, we developed an overcoated, visible light responsive, piezoelectric-assisted photocatalytic system by depositing Bi 2 S 3 photocatalysts with a narrow-band system onto the surface of highly piezo-responsive BaTiO 3 nanorods (BTO NRs). The heterojunction structure, bound by Bi-O chemical bonding, enhances carrier transport efficiency under the influence of the piezoelectric field. In the degradation experiments, the first-order rate constant for the degradation of chlortetracycline hydrochloride (CTC) in the BTO NRs/Bi 2 S 3 system with the optimal complex ratio was 0.0276 min −1 , which was 3.1 and 7.8 times higher than that of BTO NRs and Bi 2 S 3 , respectively. Additionally, we deduced the degradation pathways of CTC through a combination of Density functional theory (DFT) calculations and Liquid Chromatograph Mass Spectrometer (LC-MS), evaluating the toxicity of the intermediates. This complex system, featuring a highly photo-responsive semiconductor as a photo-acceptor deposited on a piezoelectric semiconductor surface providing a dynamic built-in electric field, enhances carrier separation efficiency under optimal light energy utilization conditions. These findings present novel and effective strategies for addressing two primary challenges in photocatalytic systems: low spectral utilization and significant photogenerated carrier complexation.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2020
·Vol. 10
·期 4
·399
·
IF 2.436
Qiannan Ye,Xu Zhang,Dong Guo,Wei Xu,Honglong Ning,Tian Qiu,Jinxiong Li,Danqing Hou,Rihui Yao,Junbiao Peng
High-quality SnO2:Si films and SnO2:10 at.% Ga films were prepared by the solution method. The roughness of films is below 1.08 nm, and possess exceptional transparency (>75%) and decent semiconductor properties. Based on this, the SnO2:Si/SnO2: Ga homojunctions with different Si doping concentrations were prepared. It is found that the conductivity of the SnO2:Si thin film gradually increases, and the rectification characteristics of the homojunction are optimized with increasing Si doping content. The SnO2:15 at.% Si/SnO2:10 at.% Ga homogeneous junction has the best performance, the turn-on voltage is as low as 5.6 V, and it also exhibits good unidirectional conductivity. The photoresponse of the SnO2:15 at.% Si/SnO2:10 at.% Ga homojunction under the lights of red, yellow, and purple was explored respectively. The result shows that the device responds strongly to purple light. Compared with the test results in the dark environment, the device current increases by two orders, which is expected to be applied in the field of near-ultraviolet detection.Keywords:solution method;SnO2;homojunction;highly transparent;photoresponse
研究领域:
材料科学
·
光电学
·
半导体物理
✓ 已验证
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
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 32
·24895-24905
·
IF 2.779
Liu Chao,Chen Hang,Lin Ping,Hu Haihua,Meng Qingyu,Xu Lingbo,Wang Peng,Wu Xiaoping,Cui Can
CsPbBr 3 emerges as a representative inorganic perovskite due to its feasible synthesis and outstanding properties. In this work, high-quality orthorhombic and cubic CsPbBr 3 single crystals (SCs) are successfully grown by a modified inverse temperature crystallization method. Current–voltage ( I – V ) and current–time ( I – t ) curves were systematically measured under various biases and light illumination intensities to investigate the correlation between the photoelectrical properties and the crystal structures. Even though the cubic CsPbBr 3 has a larger averaged carrier lifetime than those of the orthorhombic CsPbBr 3 crystal, extremely asymmetry in the I–V curves and abnormal hysteresis behaviors are observed in cubic CsPbBr 3 , and an overshoot followed by a slow decay in the photocurrent becomes more pronounced in cubic CsPbBr 3 as light illumination intensity increases, reflecting the significant effect of ion migration in the photoelectric performance in cubic CsPbBr 3 . On the other hand, the photocurrent in orthorhombic CsPbBr 3 exhibits excellent response ability and stability, showing a large light-to-dark ratio of 15.2, roughly 7 times larger than cubic CsPbBr 3 . The differences in the photoelectrical properties between cubic and orthorhombic CsPbBr 3 provide insights into the influence of crystal structure on the photoelectronic properties of perovskite materials.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 4
·1-8
·
IF 2.8
Li Dongxiang,Qian Xing,Huang Rui,Li Chunfang
Thermo-responsive poly( N -isopropylacrylamide) with terminal azobenzene group (PNIPAM-Azo) can show distinct property changes in response to temperature and light. In this paper, azobenzene-terminated trithiocarbonate (DDMAT-Azo) was synthesized as chain transfer agent, with which PNIPAM-Azo was prepared by reversible addition-fragmentation transfer (RAFT) polymerization of NIPAM in 1, 4-dioxane at 80 °C under N 2 atmosphere, azodiisobutyronitrile as initiator. The structure of DDMAT-Azo was characterized by nuclear magnetic resonance (NMR) and fourier transform infrared spectra, and PNIPAM-Azo was characterized by NMR spectra and Gel Permeation Chromatography (GPC). The result from GPC showed the numerical average molecular weight of PNIPAM-Azo was 3870 and its molecular weight distribution index was 1.31. Furthermore, thermo- and light-responsive hydrogel was obtained by introducing PNIPAM-Azo. Both PNIPAM-Azo and the hydrogel showed good light sensitivity and thermo sensitivity. Such double-stimuli sensitive hydrogel will be applied in biomaterials such as sensor, drug controlled release, information storage etc.
研究领域:
高分子化学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Liang Ren,Jianxin Chen,Qing Lu,Jian Han,Hong Wu
Membrane fouling, caused by aggregation of organics and microorganisms from filtrate on the membrane surface, seriously reduces the service life of a nanofiltration (NF) membrane. Developing facile and renewable antifouling modification methods without sacrificing separation properties of the membrane remain an imperative requirement. Herein, a thin-film composite (TFC) NF membrane with a light-responsive and regenerable functional layer (P-TFC) was fabricated via host–guest interactions between the azobenzene (guest) labeled functional polymers and the β-cyclodextrin (host) bonded membrane surface (H-TFC). The P-TFC-3 not only showed outstanding antifouling ability and high flux recovery ratio (FRR > 90% at the fourth antiadhesive test) but also exhibited enhanced water permeability (17.9 L m–2 h–1 bar–1) and high selectivity (αMgSO4NaCl = 33.4 and fast antibiotics enrichment capacity) compared with the pristine membrane. Furthermore, when the functional layer was contaminated, it can be removed by ultraviolet light irradiation and a new functional layer can be rebuilt by adding fresh azobenzene labeled functional polymers. After several regeneration processes, the membranes still showed constant separation properties and high flux recovery ability (FRR > 90%). This work proposes an easy-to-assemble and regenerable surface modification strategy to endow TFC NF membranes with excellent fouling resistance and sustainable utilization ability while maintaining high separation properties.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Nano Research
·
2020
·Vol. 13
·期 10
·2706-2715
·
IF 8.183
Yan Jing,Zhu Rongying,Wu Fan,Zhao Ziyin,Ye Huan,Hou Mengying,Liu Yong,Yin Lichen
Insufficient intratumoral penetration greatly hurdles the anticancer performance of nanomedicine. To realize highly efficient tumor penetration in a precisely and spatiotemporally controlled manner, far-red light-responsive nanoclusters (NCs) capable of size shrinkage and charge conversion were developed and co-administered with iRGD to synergistically improve the intratumoral penetration and the anticancer efficacy. The NCs were constructed using the singlet oxygen-sensitive (SOS) polyethylene glycolpolyurethane-polyethylene glycol (PEG-( 1 O 2 )PU-PEG) triblock copolymer to encapsulate the doxorubicin (DOX)-loaded, chlorin e6 (Ce6)-conjugated polyamindoamine (PAMAM) dendrimer (DCD) via the double-emulsion method. Co-administration of iRGD notably increased the permeability of NCs within tumor vasculature and tumor tissues. In addition, upon far-red light irradiation (660 nm) of tumors at low optical density (10 mW/cm 2 ), the generated 1 O 2 could disintegrate the NCs and release the DCD with positive surface charge and ultra-small size (∼5 nm), which synergized with iRGD to enable deep intratumoral penetration. Consequently, the local 1 O 2 at lethal concentrations along with the released DOX efficiently and cooperatively eradicated tumor cells. This study provides a convenient approach to spatiotemporally promote the intratumoral penetration of nanomedicine and mediate programmed anticancer therapy.
研究领域:
药剂学
·
肿瘤学
·
生物材料学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 12
·1900061
·
IF 2.622
Liang Zhao,Lin Zhang,Zelai Zheng,Ying Ling,Haoyu Tang
Homopolypeptide bearing azobenzene and triethylene glycol spacers, and 1-butylimidazolium pendants, namely P(Azo-OEG 3 -ImX) (X = Cl, I, BF 4 ) are prepared by 1,3-dipolar cycloaddition and subsequent ion-exchange reaction. Both 1 H NMR and FTIR confirm the polymer structures and reveal a high grafting efficiency (97%). P(Azo-OEG 3 -ImI) shows reversible upper critical solution temperature (UCST)-type thermoresponsive property in ethanol while P(Azo-OEG 3 -ImI/BF 4 ) shows a UCST in ethanol/water solvent mixtures. P(Azo-OEG 3 -ImI) shows UCST-type phase transitions in ethanol or ethanol/water solvent mixtures. After UV irradiation, the UCST-type cloud point temperature ( T cp ) remains constant in ethanol. However, it decreases after UV irradiation and increases after visible light irradiation in ethanol/water solvent mixtures due to the trans – cis isomerization of azobenzene moieties. P(Azo-OEG 3 -ImCl/I) shows NaI-induced UCST in water. The T cp of the P(Azo-OEG 3 -ImCl/I) aqueous solution is highly related to the polymer/salt concentration and nature of counteranions. P(Azo-OEG 3 -ImCl) also shows reversible light-responsive properties in NaI aqueous solutions. Higher NaI concentration is needed to induce a UCST for P(Azo-OEG 3 -ImCl) after UV irradiation. Moreover, ciprofloxacin-loaded hydrogel containing P(Azo-OEG 3 -ImCl) shows more efficient drug release while the UV irradiation leads to slightly low drug release.
研究领域:
高分子化学
·
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）