JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yuze Zhou,Jiaying Lei,Jing Peng,Tengling Ye,Yumeng Wang,Ruipeng Huang,Yubo Zhang,Yonghui Ren,Yuhong Zhou,Dongyan Tang
Stimuli-responsive poly( N -vinylcaprolactam) (PVCL)-based microgels, which could response to small external environmental changes, have attracted great interests in the fields of biomedicine and nanotechnology. However, the preparation of such microgels meets severe challenge due to their low incorporation efficiency and thermoresponsivity passivation. To address these issues, we select 3-( tert- butoxycarbonyl)- N- vinylcaprolactam (TBVCL), a carboxyl-functionalized VCL derivative, as a comonomer to develop pH/temperature dual-responsive microgels. TBVCL, with a structure similar to VCL, enhances incorporation efficiency and colloidal stability, while reducing thermoresponsivity passivation. The volume phase transition temperature (VPTT) of the microgels can be adjusted over a broad range (19.0–49.5 °C). Notably, the radial swelling ratios of the microgels can be modulated by pH, achieving a maximum swelling ratio of 3. The distinct changes in dissolution-precipitation behavior under different temperatures or pH conditions make these microgels suitable for applications such as smart windows and sensors. Furthermore, this novel approach for fabricating microgels with pH-tunable phase-transition temperatures demonstrates significant potential for the controlled release of nanoparticles (e.g., drugs, catalysts, and quantum dots) and the development of smart nanocrystal-polymer composite sensors.
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FIBERS AND POLYMERS
·
2024
·
IF 2.2
Zhang Meiling,Wu Peiming,Guo Ningting,Hu Wenhui,Li Min,Shao Jianhao,Su Huiying,Twebaze Collins Bagiritima,Ye Jianqing,Zheng Guangwei,Wang Zhangang,Yang Yaolin,Li Hongyan,Zhuang Xupin
In recent years, wettability materials with pH-responsive have attracted increasing attention in oil/water separation applications. However, these materials were limited by the pH range and infiltration time. Herein, a simple operational procedure is proposed to prepare banana nanocellulose cryogels with pH-responsive switchable wettability to realize these outstanding performances. Alkyl-modified cryogels (BCNC-MS) are obtained by adding methyltrimethoxysilane (MTMS) to the banana nanocellulose (BCNF) suspension. BCNC-MS are soaked in the carboxyl-modified solution to produce pH-responsive cryogels (BCNC-MS-SA). The carboxyl-modified solution is made from succinic anhydride (SA), (3-aminopropyl)triethoxysilane (KH550), and N,N-dimethylformamide (DMF) in a molar mass ratio of 1:1:18. The key to achieving the pH-response is the protonation and deprotonation of the carboxyl groups. SEM demonstrates that the modification keeps the three-dimensional porous structure of the cryogel, and the results of EDS, FTIR, and XPS show the success of alkyl and carboxyl modifications. BCNC-MS-SA can realize hydrophilic/underwater oleophobic (θ water = 0°) and hydrophobic/underwater oleophilic (maximal θ water = 135°) wettability transitions after treatment with different pH solutions. Compared with other pH-responsive oil/water separation materials, BCNC-MS-SA performs well in pH = 1 and pH = 13 environments, and the shortest infiltration time is only 3 s. With a porosity of 93.80%, BCNC-MS-SA possesses excellent adsorption capacity (10–40 g/g), oil/water separation efficiency (> 92%), and adsorption cycle performance (15 cycles) even for viscous oils. Moreover, BCNC-MS-SA has satisfactory stability. Cryogels are made of banana nanocellulose, and they are inexpensive and can be easily degraded. BCNC-MS-SA has great potential in practical applications such as oil removal and purification of oily wastewater.
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JOURNAL OF LIGHTWAVE TECHNOLOGY
·
2025
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IF 4.8
Mingshi Song,Xili Jing,Zhiyong Yin,Shuguang Li
This paper designed a based on surface plasmon resonance (SPR) optical fiber type low crosstalk pH value and temperature sensor. The sensor has the ability to detect pH value and temperature simultaneously, and can overcome the error factor caused by temperature changes in the pH value detection process of optical fiber sensors. Sensor is based on a multimode fiber (MMF) fused with a coreless fiber (NCF) to build the sensing substrate. Ag was used as SPR excitation material and polyacrylic acid (PAA)/ chitosan (CS) composite membrane was used for pH detection. Compared with previous research on temperature compensation, the SPR cascade sensing method treated by TiO2/PDMS composite membrane significantly improved the temperature sensitivity of SPR signals and reduced crosstalk. This ensures that the SPR signal has a sufficient working range. In the range of -10°C ∼ 100°C, the maximum temperature sensitivity can reach -4.1301 nm/°C, and the detection limit (DL) is 0.1542°C. In the pH range of 4.08 ∼ 9.85, the sensor's pH sensitivity can reach up to -17.9359 nm/pH, and the resolution is 0.1272pH. Excellent sensing performance. The sensor is important for advancing future applications of high-precision temperature compensation detection, high-sensitivity pH biodetection, and SPR modulation technology.
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LANGMUIR
·
2024
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IF 3.7
Shihao Gu,Mei Liu,Renle Xu,Xu Han,Yuhang Lou,Yue Kong,Yanqing Gao,Shibin Shang,Zhanqian Song,Jie Song,Jian Li
The exploration of environmentally friendly, less toxic, sustained-release insecticide is increasing with the growing demand for food to meet the requirements of the expanding population. As a sustained-release carrier, the unique, environmentally friendly intelligent responsive hydrogel system is an important factor in improving the efficiency of insecticide utilization and accurate release. In this study, we developed a facile approach for incorporating the natural compound rosin (dehydroabietic acid, DA) and zinc ions (Zn2+) into a poly(N-isopropylacrylamide) (PNIPAM) hydrogel network to construct a controlled-release hydrogel carrier (DA-PNIPAM-Zn2+). Then, the model insecticide avermectin (AVM) was encapsulated in the carrier at a drug loading rate of 36.32% to form AVM@DA-PNIPAM-Zn2+. Surprisingly, the smart controlled carrier exhibited environmental responsiveness, strongly enhanced mechanical properties, self-healing ability, hydrophobicity, and photostability to ensure a balance between environmental friendliness and the precision of the drug release. The release experiments showed that the carboxyl and amide groups in the polymer chains alter the intermolecular forces within the hydrogel meshes and ingredient diffusion by changing temperatures (25 and 40 °C) and pH values (5.8, 7.4, and 8.5), leading to different release behaviors. The insecticidal activity of the AVM@DA-PNIPAM-Zn2+ against oriental armyworms was good, with an effective minimum toxicity toward aquatic animals. Therefore, AVM@DA-PNIPAM-Zn2+ is an effective drug delivery system against oriental armyworms. We anticipate that this ecofriendly, sustainable, smart-response carrier may broaden the utilization rosin and its possible applications in the agricultural sector.
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Polymer Chemistry
·
2017
·Vol. 8
·期 45
·7025-7032
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IF 5.375
Jiang Xiao,Junyan Tan,Rujian Jiang,Xiongliang He,Yanzhi Xu,Ying Ling,Shifang Luan,Haoyu Tang
A homopolypeptide, namely poly(S-(2-carboxylethyl)-L-cysteine) (PCELC), with pH and redox dual responsiveness was prepared by ring-opening polymerization of S-(2-(methoxycarbonyl)ethyl)-L-cysteine based N-carboxyanhydride (MCELC-NCA) and subsequent hydrolysis. The pH-induced solution phase transition of PCELC was at pH = ∼4.50 as revealed by DLS and UV-vis spectroscopy. The thioether linkages of PCELC can be readily oxidized by H2O2 at 40 °C yielding PCELCox with sulfoxide and sulfone linkages as revealed by 1H NMR and FTIR. PCELCox also showed pH responsiveness with the variation of polymer aggregation sizes, but without solution phase separation. PCELCox can be partially reduced by 3-mercaptopropionic acid as suggested by 1H NMR and FTIR analysis. The pH-induced solution phase transition behavior of the reduction product (i.e., PCELCre) was different from that of the as-prepared PCELC. Moreover, PCELC can be used as a pH and oxidation dual responsive stabilizer to control the aggregation of single-walled carbon nanotubes (SWCNTs) in aqueous solution.
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Wei Cheng,Junpeng Nie,Lv Xu,Chaoyu Liang,Yunmei Peng,Gan Liu,Teng Wang,Lin Mei,Laiqiang Huang,Xiaowei Zeng
In this study, we introduced a targeting polymer poly(ethylene glycol)–folic acid (PEG–FA) on the surface of polydopamine (PDA)-modified mesoporous silica nanoparticles (MSNs) to develop the novel nanoparticles (NPs) MSNs@PDA–PEG–FA, which were employed as a drug delivery system loaded with doxorubicin (DOX) as a model drug for cervical cancer therapy. The chemical structure and properties of these NPs were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption/desorption, dynamic light scattering-autosizer, thermogravimetric analysis, and Fourier transform infrared spectroscopy. The pH-sensitive PDA coating served as a gatekeeper. The in vitro drug release experiments showed pH-dependent and sustained drug release profiles that could enhance the therapeutic anticancer effect and minimize potential damage to normal cells due to the acidic microenvironment of the tumor. These MSNs@PDA–PEG–FA achieved significantly high targeting efficiency, which was demonstrated by the in vitro cellular uptake and cellular targeting assay. Compared with that of free DOX and DOX-loaded NPs without the folic targeting ligand, the FA-targeted NPs exhibited higher antitumor efficacy in vivo, implying that they are a highly promising potential carrier for cancer treatments.
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ULTRASONICS SONOCHEMISTRY
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2024
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IF 8.7
Dan Zheng,Danrong Yu,Shuai Lin,Liting Ji,Yaogui Sun,Chunyou Liu,Xiaoyu Zhang,Zhihui Yu
Salted duck eggs are a popular food product, but their high salt content and uneven salt distribution can reduce acceptability. This study investigated the effects of pH-high-intensity ultrasound combined treatment on the salt-induced gelation properties of egg yolk granules. The results showed that the pH5 + 150 W treatment group exhibited the best physical and gelation properties, with the smallest particle size (1597.33 nm), optimal dispersibility (PDI 0.29), and good stability. The gelation properties of this group also demonstrated excellent springiness (0.30 mm), cohesiveness (0.56), and gumminess (0.05 N). Furthermore, the pH5 + 150 W group had the highest water holding capacity of 97.42 % and relatively high hydrophobicity (173.39 μg). Notably, it also showed high oil exudation (2.83 %) and good sandiness (62.07 %). The pH5 + 150 W led to a significant redshift of the fluorescence peak at 335 nm and an enhancement of the peak intensity at 562 nm compared to the control group. Structural characterization revealed a more ordered protein structure and a uniform gel structure with enhanced electrostatic repulsion between oil droplets. Secondary structure analysis of the proteins showed a significant reduction in α-helix and β-sheet, while β-turn and random coil increased. In summary, the pH5 + 150 W treatment displayed the best gelation properties, providing theoretical guidance for enhancing the processing performance of yolk and expanding their application in the food industry.
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Food Bioscience
·
2024
·
IF 4.8
Yan Zhu,Yameng Gao,Wenke Wang,Wenjie Kan,Caiguo Tang,Lifang Wu
Fusarium graminearum ( F. graminearum ) poses a substantial threat to global food security, with its impact closely linked to environmental conditions. This study aims to anticipate F. graminearum spore growth across diverse environments and assess alterations in the fungistatic capacity of hydrogen sulfide (H 2 S) gas in response to environmental variations. The experimental data, namely spore germination ratios, are monitored and recorded at hourly intervals across 100 permutations comprising four distinct temperature levels, five varying pH values, and five diverse concentrations of H 2 S. The investigation integrates three environmental factors as input variables, utilizing a feedforward neural network to establish growth boundaries based on spore germination ratios. The accuracy of models at various stages–training, validation, and testing–is evaluated using a confusion matrix. Logistic regression models are employed for effectiveness comparison with neural networks. Results indicate that neural networks successfully predict F. graminearum spore germination events. Notably, H 2 S does not influence the temperature preferences of spores. Temperature has a more substantial impact on the fungistatic ability of H 2 S compared to pH. The study reveals the adaptability of F. graminearum spores to adverse conditions over time. This research delves into temperature, pH, and H 2 S synergistic effects on spore germination, contributing to predictive models for F. graminearum and enhancing our understanding of how environmental factors regulate its growth.
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Environmental Science-Nano
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2024
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IF 5.8
Daqing Chen,Minghui Li,Wanzhu Wang,Danhua Ge,Xiaojun Chen
Developing high-performance nanozymes at neutral pH is extremely necessary for the application of biological and water environmental systems. RuCl3 modified hollow Co3O4 nanospheres (Ru3+-Co3O4 HNSs) were utilized to establish a colorimetric sensor for selective determination of sulfide ions (S2-). The hollow Co3O4 nanospheres after doping of Ru3+ provide large surface area and more active sites, thereby boosting the electron transport and the affinity to the substrates. Specifically, the as-prepared Ru3+-Co3O4 HNSs exhibited remarkable peroxidase-like (POD-like) activity, which can catalyze colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxTMB at neutral pH condition. Furthermore, the Ru3+-Co3O4-based colorimetric sensor achieved a wide linear range (0.5-20 μM) and a low detection limit (0.051 μM) for S2- ions concentration, as well as good selectivity, reproducibility and practicability in sewage water. This research aims to boost the accuracy of S2- detection and shed light on application prospects in the water environmental fields.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Chunwang Hu,Hongliang Wei,Hongli Chen,Bing Zhang,Wenjing Zhang,Gang Wang,Tao Guo
A temperature/pH dual sensitive hydrogel with a semi-interpenetrating network (semi-IPN) structure was synthesized through an aqueous amino-succinimide reaction between water-soluble polysuccinimide and polyethyleneimine in the presence of thermosensitive cellulose derivatives. Single-factor experiments were carried out to optimize the preparation conditions of the semi-IPN hydrogel. The swelling behavior and cytotoxicity assay of the hydrogel were tested. Finally, taking 5- fluorouracil (5-Fu) as a model drug, the release performance of the 5-Fu-loaded hydrogel was investigated. The results indicated that the swelling ratio (SR) first decreased and then increased when the pH of the solutions ascended from 2 to 10. The SR decreased with the increase in temperature. In addition, the swelling behavior of the hydrogel was reversible and reproducible under different pH values and temperatures. The prepared hydrogels had good cytocompatibility. The release behavior of 5-Fu was most consistent with the Korsmeyer-Peppas model and followed the case II diffusion. The acidic environment was beneficial for the release of 5-Fu. The preparation process of the semi-IPN hydrogel is simple and the reaction can proceed quickly in water. The strategy introduced here has great potential for application in the preparation of drug carriers.
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JOURNAL OF LIGHTWAVE TECHNOLOGY
·
2024
·
IF 4.1
Pengqi Gong,Xuegang Li,Xue Zhou,Fang Wang,Yanan Zhang,Yong Zhao
This study presents a groundbreaking dual-channel sensing technology embedded within a meticulously fabricated microcavity optical fiber structure using femtosecond laser technology. This microcavity design enables the generation of both surface plasmon resonance (SPR) and Mach-Zehnder interferometer (MZI) signals, eliminating crosstalk—a critical challenge in traditional multi-parameter sensing. This achievement ensures a precise one-to-one correspondence between output signals and the measured variables. Using layer-by-layer self-assembly, the SPR sensing region was selectively modified with a pH-sensitive material. In parallel, the temperature-sensitive material was integrated into the microcavity via microfluidic filling. This dual approach facilitates the simultaneous detection of temperature and pH levels. Experimental results validate the technology's exceptional capabilities: the SPR channel exhibits a remarkable sensitivity of −16.5 nm/pH for pH monitoring, while the MZI channel demonstrates a sensitivity of 1.15 nm/ °C for temperature detection. These values represent significant advancements over previous studies. The sensor developed in this research offers several key advantages: simultaneous temperature and pH measurement, minimized crosstalk, and outstanding sensitivity. This technology holds tremendous promise for enhancing water quality monitoring, safeguarding aquatic environments, and controlling water pollution, marking a significant step forward in environmental protection technologies.
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Agronomy-Basel
·
2024
·Vol. 14
·期 2
·352
·
IF 3.3
Zihao Ye,Dihao Xu,Jiawen Zhong,Shuang Gao,Jinjin Wang,Yulong Zhang,Huijuan Xu,Yongtao Li,Wenyan Li
The co-transport of contaminants by soil colloids can generate substantial environmental risk, and this behavior is greatly affected by environmental conditions. In this study, AF4-ICP-MS was used to investigate the size distribution and composition of Cd/Pb-bearing colloids; saturated sand column experiments were used to investigate the impact of soil colloids on the transport of Cd/Pb under different pH and ionic strength conditions. AF4-ICP-MS characterization showed that natural colloids were primarily associated with two sizes ranges: 0.3–35 KDa (F1, fine nanoparticles) and 280 KDa–450 nm (F2, larger nanoparticles), which mainly consisted of organic matter (OM), iron (Fe), and manganese (Mn) (oxy)hydroxides and clay minerals. Fine nanoparticles could strongly adsorb Cd and Pb under all environmental conditions. Mn and Fe (oxy)hydroxides generally formed under neutral to alkaline conditions and exhibited adsorption capabilities for Cd and Pb, respectively. Transport experiments were conducted under different pH and ionic strength conditions. At pH 3.0, soil colloids had little effect on the transport of Cd2+and Pb2+. At pH 5.0, soil colloids inhibited the transport of Cd2+by 16.1%, and Pb2+recovery was still 0.0%. At pH 7.0 and 9.0, soil colloids facilitated the transport of Cd2+by 15.6% and 29.6%, facilitated Pb2+by 1.3% and 6.4%. At an ionic strength of 0, 0.005, and 0.01 mol L−1NaNO3, soil colloids facilitated the transport of Cd2+by 77.7%, 45.8%, and 15.6%, only facilitated the transport of Pb2+by 46.2% at an ionic strength of 0 mol L−1NaNO3. At an ionic strength of 0.05 mol L−1NaNO3, soil colloids inhibited the transport of Cd2+and Pb2+by 33.1% and 21.0%, respectively. The transport of Cd2+and Pb2+facilitated by soil colloids was clearly observed under low ionic strength and non-acidic conditions, which can generate a potential environmental risk.
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