CELLULOSE
·
2024
·Vol. 31
·期 14
·8681-8693
·
IF 4.9
Yi Zhaodi,Song Zengbin,Wang Jian,He Ming
Hydrogel smart windows with light modulation capability have received widespread attention because they can meet the requirements of indoor lighting at daytime, privacy protection at night and energy saving. However, it remains challenging to achieve these multiple goals simultaneously and enable active actuation to meet the temporary needs of users. In this study, a thermal and solvent responsive hydrogel smart window was developed by introducing hydroxypropyl cellulose (HPC) and sodium dodecyl sulfate (SDS) micelles into a polyacrylamide (PAAm) cross-linked network. By adding different concentrations of NaCl solution, the hydrogels underwent upper critical solution temperature (UCST)- and lower critical solution temperature (LCST)-type phase transitions in the ranges of 1 − 15 °C and 25 − 80 °C, respectively, which enabled the hydrogel to achieve a reversible transition between opacity and transparency with temperature change. The smart window exhibited an excellent solar modulation ability (T lum = 91.39%, ΔT sol , 15−5℃ = 68.67%, ΔT sol , 15−40℃ = 62.50%) and effective IR shielding. Furthermore, actively actuated light modulation of hydrogel smart windows was achieved by spraying ethanol on the hydrogel surface. Ethanol stimulation and volatilization induced the reconfiguration and dissociation of hydrogen bonds between HPC and PAAm molecular chains, resulting in reversible transparency transitions. We anticipate that this facile strategy for preparing thermal and solvent responsive hydrogels could serve as a promising alternative for designing phase change hydrogels for a variety of applications. Graphical Abstract
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xuan Xie,Meiming Lu,Guanhua Li,Guanghui Gao,Jingyi Kang,Qin Zhang,Xin Liu
Smart electromagnetic shielding materials have attracted great attention in increasingly complex electromagnetic environments. In addition, impact protection is also highly important for precision instruments to avoid mechanical injury. However, it is rare and challenging to enable anti-impact behavior and adjustable electromagnetic shielding into one soft hydrogel. Herein, a graphene-assisted smart electromagnetic shielding hydrogel with post-tunable mechanical behaviors and impact resistance is successfully prepared through the precipitation polymerization of the methacrylamide in binary solvents of water and dimethyl sulfoxide. The precipitation polymerization imparts the hydrogels with a unique spherical molecular network conformation, which enables high and tough mechanical performance, impact resistance, anti-swelling, and structural stability. Moreover, the hydrogels demonstrate excellent electromagnetic shielding performance, mechanical anti-interference, and low-temperature resistance. More importantly, the hydrogels possess solvent-response reversible on–off electromagnetic shielding and a post-tunable mechanical performance (Elastic modulus from 0.14 MPa to 37.13 MPa, tensile strength from 70 kPa to 1400 kPa). It is envisioned that the strategy of the impact-resistant and switchable electromagnetic shielding hydrogel would provide an insightful outlook for constructing promising electromagnetic shielding and impact-resistance materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 8
·1058
·
IF 2.9
Yuping Zhang,Xinxin Chen,Pei Yuan,Haie Chen,Songwei Li
The fabrication of durable materials with excellent oil-adsorption capacity and separation performance for the treatment of oily wastewater is meaningful based on the special property of smart responsiveness. Herein, a solvent-responsive melamine sponge (MS) was developed via silanization and the in situ growth of a zeolitic imidazolate framework-8 (ZIF-8). Detailed characterization of the resultant composite MS was conducted using scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and X-ray diffraction (XRD). The multiscale hierarchical MS substrate exhibited highly hydrophobic properties in the pH range of 1–11, along with a satisfactory adsorption capacity in the range of 65.4–134.2 g/g for different oils. The modified surface transformed from superhydrophobic/superlipophilic to superhydrophilic/underwater superoleophobic upon ethanol wetting, reverting to its original superhydrophobic state upon drying. The separation flux of the MS substrate was above 1.5 × 104L/m2h for both oil and water removal, and the separation efficiency was greater than 98.7%. The absence of obvious changes in separation performance after 50 successive immiscible oil−water separations indicated the excellent durability and robustness of the anchored ZIF-8 nanoparticles on the surface of the modified MS substrate. More importantly, oil-in-water emulsion separation was successfully carried out via the ZIF-8 MS composite, showing high separation efficiency (over 99.1%). The developed smart sponge, which had high oil-adsorption capacity, excellent chemical stability, and fire resistance, has a wide range of potential practical applications in the convenient treatment of oily wastewater.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Min Guo,Xiao-Qing Yu,Jin Zhao,Jia-Wei Wang,Ren-Kun Qing,Ji-Dong Liu,Xingjiang Wu,Liangliang Zhu,Su Chen
Photonic crystals with orderly periodic structure and manipulated structural colors have garnered widespread attention in sensors field. However, the unsatisfactory detection range, low sensitivity and inconvenient integration highly limit their further practical applications. In this paper, by combining TiO 2 inverse opal photonic crystal with polyacrylamide hydrogel, a novel organic-inorganic composite solvents responsive photonic hydrogel (SRPH) was developed. By encapsulating TiO 2 inverse opal photonic crystal with high refractive index in this hydrogel, the photonic hydrogels, therefore, possess bright structural colors. Due to the discrepancy in swelling rate of SRPH film in various solvents (ethanol, dimethyl formamide , dimethyl sulfoxide , etc.), it can identify these organic solvents through the rapid change of structural colors and detect the concentrations of the solvent in a wide range. Even for solvents with similar refractive index, it can be clearly distinguished, along with the excellent repeatability. Benefiting from the wide detection range and high sensitivity, the chip sensors were then developed by integrating multiple hydrogel films into the microfluidic system, which have high efficiency in solvent naked-eye multi-identification and concentration multi-detection. The new composite photonic hydrogels provide a reference for the design of functional photonic crystals and next-generation application of sensors .
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Advances
·
2021
·Vol. 3
·期 15
·4519-4527
·
IF 4.553
Pingping Wu,Jingxia Wang,Lei Jiang
Monitoring and post-processing of organic solvents are important for environmental protection. Challenges remain in the development of a universal material which can detect any solvent with a large stopband shift and show excellent stability. Herein, we demonstrate a poly 3,4-ethylenedioxythiophene inverse opal (PEDOT-IO) with a large stopband shift toward various solvents based on the insolubility/superoleophilicity properties. The PEDOT-IO film was fabricated by the potentiostatic polymerization of 3,4-ethylene dioxythiophene using a three-electrode system, infiltrating the interstices of the photonic crystal template with PEDOT and subsequently removing the template. The surface of the PEDOT-IO film presented a composite structure: interconnected pores and hollow shells. When the solvent was introduced into the voids of PEDOT-IO film, the effective refractive index (n) of the whole sample increased due to the replacement of air with the solvent, and the pores and hollow shells showed different degrees of swelling. The synergistic effect of increased n and volume expansion contributed to a large redshift of the stopband of the PEDOT-IO film. PEDOT-IO film exhibited excellent resistance to various solvents and high/low temperature. This work further enriches the application of conductive polymers in solvent-responsive PC sensors and provides a novel means of creating PC-based optical materials and devices.
研究领域:
材料科学
·
环境科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2014
·Vol. 22
·期 1
·553-563
·
IF 3.033
He Meng,Duan Bo,Xu Dingfeng,Zhang Lina
Water responsive SiO 2 /cellulose nanocomposite hydrogels and films were constructed, for the first time, by dispersing SiO 2 nanoparticles into cellulose solution in LiOH/urea solvent, and then by crosslinking with epichlorohydrin or regeneration in coagulation bath, respectively. The cellulose nanocomposite materials were characterized by Field emission scanning electron microscopy, FTIR, dynamic rheology, wide angle X-ray diffraction and mechanical test. The SiO 2 /cellulose nanocomposites at wet state or in water displayed unique behaviors, showing higher light transmittance than those before contacting with water. The results revealed that strong hydrogen-bonding interaction among water, cellulose and SiO 2 led the good dispersion of SiO 2 nanoparticles in the cellulose matrix. The incorporation of SiO 2 nanoparticles improved the transmittance and mechanical strength of the cellulose hydrogels, and also enhanced the mechanical strength of the films. Especially, the cellulose/SiO 2 nanocomposite films were milky at dry state, and changed to transparent after being soaked in water, different from the cellulose film without the SiO 2 nanoparticles. In our findings, SiO 2 and cellulose with water could form strong hydrogen bonding to create a homogenous network structure. The cellulose/SiO 2 composite as a smart material exhibited moisture and solvent responsiveness, showing potential applications in moisture detection.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Dan Xiao,Meng-Ting Zheng,Fang-Juan Wu
In nature, early warning, response, and driver behaviors in different environments are essential for living organisms, which, however, is still a big challenge to be conquered in synthetic materials. Herein, an asymmetrical VGO-CB bilayer film inspired by the dermis of leaves was designed using self-assembled graphene oxide (GO) and vermiculite (V) with cucurbituril (CB). Due to the outstanding of smart fire switching of GO, a highly stable substrate of V and excellent carbon-forming of CB, the designed VGO-CB bilayer film exhibited a highly sensitive fire-warning response (0.20 s). Besides, given the asymmetrical swelling of bilayer structure and supramolecular host–guest of CB, the VGO-CB film not only presented a unique highly sensitive response in solvent vapors, humidity, self-driven, and smart switching, but also revealed controllable swift movement and bending for grabbing double weight. The bio-inspired leaves concept combines a fire alarm, response and self-driven with artificial intelligence, which provides potential applications for smart materials, early warning, and soft robotics.
研究领域:
材料科学
·
仿生学
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Xue-Min Yang,Yu-Ping Wu,Yue Qi,Meng-Ting Zheng,Fen Xie,Qian-Ting Wang,Xue-Qing Xiao,Dan Xiao
In this study, a multifunctional graphene oxide/β-cyclodextrin bionanohybrids (BWGO) was prepared successfully. The structure, morphology, adsorption capacity, solvent response, and light-driven properties of the BWGO were systematically investigated through the in-situ formation of an asymmetric gradient structure. The maximum adsorption value of BWGO based on bio-nanohybrids was 81.27 mg·g −1 for methylene blue (MB), which fitted the Langmuir isotherm in accordance with the pseudo-secondary kinetic model. Additionally, the host–guest interaction model of between BWGO and MB (in ratios of 1:1 or 1:2) was proposed by ROESY. Remarkably, the BWGO exhibited not only unique and exceptional responses to organic hazard solvents, self-driven, and photothermal responses, but also demonstrated controllable object loading and shape memory useful for soft grasping. More importantly, the related mechanisms of adsorption and behaviors driven by multiple stimuli (solvent, light) were elucidated through the host–guest interaction, wrinkled structure, gradient solvent swelling effects, and conformational changes in the macromolecular chain. This work not only introduces the multifunctional bionanohybrid materials with a wrinkled structure for the adsorption of organic dyes, but also opens avenues for potential applications in smart windows, soft grasping, and biomimetic industrial materials.
研究领域:
材料科学
·
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yahan Cui,Zhongyu He,Yang Xu,Yu Su,Lan Ding,Yi Li
The fabrication of facile and versatile adsorbents with switchable adsorption performance based on molecularly imprinting polymers is of great interest although still very challenging. Herein, a dynamic solvent-responsive poly (ethylene glycol) unit-containing chain was introduced as cross-linker to prepare solvent-responsive molecularly imprinted polymers (S-MIPs) by free radical polymerization. Acryloyl-modified beta-cyclodextrin was used as functional monomer, methacrylic acid as co-functional monomer and bisphenol A (BPA) as model template. BPA can be tightly adsorbed in recognition sites by host-guest interaction and hydrogen binding. Solvent-responsiveness of S-MIPs was investigated. Templates can be easily bound into the recognition cavity in 25% methanol aqueous solution with binding capacity of 21.36 mg/g while completely release in 100% methanol following the de-swelling of the imprinting cavity. Binding experiments demonstrated that S-MIPs displayed appreciable recognition capability and selectivity toward BPA in 25% methanol solution, well lining with Langmuir isothermal model and pseudo-second-order model. The proposed S-MIPs were successfully applied for the direct enrichment of BPA from human urine without protein pre-deposition process. Under the optimum conditions, the S-MIPs exhibited satisfactory recoveries ranging from 77.3% to 87.8% (spiked level from 40 μg/L to 800 μg/L), indicating excellent applicability for specific analytes removal from urine samples. This simple synthetic strategy provides an efficient route to synthesize the new intelligent materials for sample analysis in complicated biological matrixes.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Yongzhi Liang,Yuexin Shen,Haiyi Liang
The development of shape deformation hydrogels has aroused interests of their immense applications in diverse fields such as actuators, soft robotics, and artificial muscles. However, the existing deformable hydrogels can hardly meet the requirements of facile preparation, excellent mechanical properties and reversible shape memory, which greatly limits their further applications. In this work, a new type of fully physically cross-linked deformable hydrogel with mechanically strong, tough, stretchable, and solvent-responsive property is fabricated via free radical polymerization at room temperature, followed by immersed in a Fe 3+ aqueous solution. The strong physical interactions of polyacrylic acid (PAA)-Fe 3+ metal complexation and hydrogen bond endowed this hydrogel with high tensile strength (~5.14 MPa), high stretchability (~1000%), high toughness (~20.36 MJ/m 3 ) and excellent flexibility (~0.53 MPa). In addition, programmable shape deformation hydrogel is achieved by selective coating of Fe 3+ on surface, the hydrogel strips can be deformed into arbitrary shapes such as the letter “o”, “d”, “s”, and “w”. More impressively, reversible shape recovery of hydrogel has been achieved via two methods: the elimination of coated Fe 3+ with the reaction of NaOH and the dehydration of the glycerin. Taking advantage of this property, we simulate the closure and opening of hydrogel flower by soaking it into water and NaOH/glycerin alternately. Moreover, the soft robotic gripper has been fabricated based on the mechanically strong and solvent-triggered hydrogel, capable of grabbing about 1.56 times its own weight, which indicating the potential application as load-carrying soft robots.
研究领域:
材料科学
·
生物工程
·
软体机器人技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Peng Ren,Xiaodong Chen,Luetao Sun,Quanqian Lyu,Lianbin Zhang,Jintao Zhu
Invisible photonic patterns (IPPs) are photonic materials that can display hidden patterns under external stimulation and are attractive in anti-counterfeiting devices and information storage. In this work, we report a solvent-responsive invisible photonic pattern (SRIPP) with high contrast by polymerizing two monomers of acrylamide (AAm) and poly(ethylene glycol) methacrylate (PEGMA) with different solubility parameters in different regions of poly(hydroxyethyl methacrylate) photonic gels. The two regions with different solvent responsiveness can shrink and swell in the same environment, thus causing the colors of different regions of photonic gel to shift in opposite directions from the initial state. As a result, the contrast of photonic patterns is significantly improved, increasing naked-eye visualization. In addition, by introducing fluorescent substances into the photonic gel and adjusting the photonic band gap (PBG) of photonic gels, we realize the regulation of fluorescence emission and display of fluorescence patterns by utilizing different PBGs on the SRIPP. Dynamic solvent responsiveness patterns and fluorescence patterns are integrated into a photonic gel, showing great potential in information storage and multiple-mode anti-counterfeiting applications.
研究领域:
材料科学
·
光学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yanan Bu,Ting Wu,Jiji Fan,Xiuqiong Chen,Siyuan Zhao,Zhenrong Yu,Huiqiong Yan,Qiang Lin
It is a great challenge to develop information processing materials with powerful encryption/decryption functions because of the constraints of traditional materials. In this work, adamantane (Ad) groups were grafted onto poly (N-isopropyl acrylamide) (PNIPAm) to synthesize the PNIPAm derivative (Ad-PNIPAm) by radical polymerization, which was further used to fabricate the semi-interpenetrating network (IPN) composite hydrogel (Ad-PNIPAm gel) that had dual temperature and solvent response optically tunable behavior under the assisted polymerization of NIPAM and chemical crosslinking of N,N’-methylene diacrylamide (MBA). The resultant composite hydrogel exhibited sensitive solvent and temperature stimulus response, high resolution and inducible reversible information recording, self-encryption and decryption functions. By changing the grafting degree of Ad-MA in Ad-PNIPAm, the hydrophilic-hydrophobic balance of Ad-PNIPAm could be adjusted to regulate the stimulus response of Ad-PNIPAm gel. As the grafting degree of Ad groups increased, the response temperature of Ad-PNIPAm gel gradually decreased, while the solvent response sensitivity was enhanced successively. In addition, this work not only controlled the encryption and decryption process of composite hydrogels by exploring different concentrations of ethanol solutions and various organic solvents, but also extended the information confidentiality time to the maximum extent and regulated the encryption and decryption process by introducing the host-guest recognition effects of β-cyclodextrin (β-CD) and Ad. Compared with the traditional PNIPAm hydrogel, the fabricated composite hydrogel possessed a wider temperature response range and a higher solvent response threshold, which could realize information entry, encryption and decryption at low temperatures, making the PNIPAm hydrogel based information processing model more suitable for real life scenarios. This PNIPAm based composite hydrogel with multiple regulation and multiple responses exhibited great potential in the fields of information writing and encryption/decryption.
研究领域:
材料科学
·
化学
✓ 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）