PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Yue Wu,Xiaotian Zhang,Mengyao He,Xue Tian,Neng Qian,Yangyi Sun,Dongming Qi
Microfiber-composed functional synthetic leather is of particular interest because it owns the advantages of good fluffiness, softness, excellent hygroscopicity , the random three-dimensional bundle structure similar to that of natural leather, which grants excellent moisture permeability, air permeability , chemical resistance, waterproof and mildew resistance, and various functions. Typically, the microfiber of functional synthetic leather is obtained through splitting the original sea-island fiber by solvent-induced dissolution and etching of its sea phase, which inevitably leads to the decline of the wettability of the treated leather. Herein, light-triggered functional microcapsules for self-healing wettability of split microfibers have been judiciously designed and developed. These functional microcapsules loaded with fluoroalkyl silane , which are used to coat onto the original sea-island fiber, allow for photocontrol of releasing the superhydrophobic chemical to the coated fibers. Despite the superhydrophobicity of the split fiber would be weakened by the splitting operation, the light-triggered release of fluoroalkyl silane can effectively amend its superhydrophobic properties. The microfiber leather self-repaired by the functional microcapsules exhibits good superhydrophobic performance, excellent self-cleaning ability to dust and RhB solution, high friction resistance (up to 200 rubs), and good UV light self-repairing cycle performance. This study provides a versatile solution for efficiently self-repairing microfiber leathers after the splitting process.
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
POLYMER COMPOSITES
·
2023
·
IF 5.2
Xudong Li,Junwei Wang,Xiaoyun Li,Qifeng Li,Maoqing Kang
Microcapsules with polydopamine composite shell layer were successfully synthesized by functionalizing silica-modified microcapsules containing isophorone diisocyanate. The components and micromorphology of silica-modified microcapsules at different reaction periods were studied by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy. The structure of different microcapsules was characterized by FTIR, 1 H nuclear magnetic resonance and x-ray photoelectron spectroscopy. The mechanical performances of different microcapsules were analyzed by nanoindentation technique. The compatibility and self-healing efficiency of different microcapsules with the substrate were also investigated by the tensile tests. The results showed that the density of the silica-modified microcapsule shell gradually increased and the mechanical performances were enhanced with the silica source. The hardness and elastic modulus of silica-modified microcapsules in suitable core fraction (76.5 wt%) were 139.9 MPa and 2.2 GPa, which are 2.3 times and 4.8 times higher than those of untreated microcapsules, respectively. The functionalized modified microcapsules had excellent compatibility with the elastomeric substrate (PU-PPG2000). At the same time, the self-healing efficiency of the functionalized modified microcapsules in PU-PPG2000 was 69.8%, which was 48.9% higher than that of the untreated microcapsules prepared under the same conditions. Silicon modification improved the density of microcapsules, enhancing their mechanical strength. At the same time, functionalization modification improved the interfacial bonding strength of microcapsules, further improving the compatibility with the polymer matrix. Highlights Microcapsules with different silicon sources are characterized. Microcapsules are functionalized with polydopamine. Individual microcapsules are tested for mechanical strength by nanoindentation. The compatibility of the functionalized microcapsules is excellent. The self-healing efficiency of modified microcapsules is greater than 70%.
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
Materials Today Chemistry
·
2025
·
IF 6.7
Potao Sun,Wenxu Tang,Wenxia Sima,Chaolu Niu,Tao Yuan,Ming Yang,Qichang Liu,Zheng Fang,Ninglong Fu,Ze Yin
Microcapsule-based self-healing is an effective strategy for addressing multiscale damage in polymeric materials. However, conventional methods exhibit limited repair capabilities for large-scale damage (at the submillimeter level) under low microcapsule doping concentrations (<5 wt%). This study proposed a dual self-healing mechanism through the development of a double-shell microcapsule/modified epoxy resin composite (DMMEC). The topological reconstruction of the epoxy matrix was achieved by incorporating a 5-wt% terephthalaldehyde crosslinker, endowing the system with dynamic covalent adaptive network characteristics. Polyurethane/polyaniline (PU/PANI) double-shell microcapsules with photothermal conversion enabled infrared-triggered localized viscoelastic matrix flow, synergistically inducing damage propagation through minimal repair agent release. Notably, permittivity disparities at the microcapsule-matrix interface were found to guide the targeted development of micrometer-scale electrical tree damage, achieving efficient microscale electrical tree repair at a low doping concentration (2 wt%). Moreover, when subjected to large-scale mechanical scratch damage (2-mm length × 100-μm width), recovery rates of 91.3 % in mechanical strength and 90.4 % in electrical strength were attained. The proposed method overcomes the inherent trade-off between healing efficiency and matrix performance degradation in low-load microcapsule systems, thereby providing a novel paradigm for efficient multiscale damage restoration in polymeric materials.
研究领域:
材料科学
·
高分子科学
·
自修复材料
·
纳米技术
·
电气绝缘
·
光热转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Yubin Zhang,Zhengsong Qiu,Xin Zhao,Jiaxing Mu,Yongle Ma,Hanyi Zhong,Weian Huang,Yunfan Liu
The friction heat generated during the drilling process of natural gas hydrate bearing sediment (HBS) leads to the temperature of drilling fluid higher than the phase equilibrium temperature of hydrate, which induces hydrate decomposition and wellbore instability. In this work, tetrabutylammonium bromide (TBAB) and Nano-silica were microencapsulated by inverse emulsion interfacial polymerization. The effect of different preparation conditions on the encapsulation rate of microcapsules was characterized by differential scanning calorimetry (DSC), and the highest encapsulation rate was 62.2% with the melting enthalpy of 121.4 J/g. Polarizing microscope, scanning electron microscope (SEM) and transmission electron microscope (TEM) images were used to characterize the synthesis process and microstructure of microcapsules, which proved a quasi-spherical structure coated with Nano-silica. Furthermore, it was confirmed that the microcapsules also had good thermal conductivity , reliability and thermoregulating performance. The rheological parameters of drilling fluid with 5 wt% microcapsules increased slightly, and the filtration loss decreased, indicating good compatibility. In addition, it is convenient to adjust the melting temperature of the core materials by adding NaCl with different concentrations. This study is of guiding significance to realize intelligent temperature-control of hydrate bearing sediment during drilling.
研究领域:
材料科学
·
能源工程
·
地质工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Xu-Chun Song,Ya-Lan Yu,Gui-Yuan Yang,A.-Li Jiang,Ying-jie Ruan,Shang-hua Fan
A simple and versatile strategy for controlled production of monodisperse ethyl cellulose (EC) microcapsules by a single-stage emulsification method has been developed. Monodisperse oil-in-water emulsions, obtained by a microfluidic device, are used as templates for preparing EC microcapsules. Oil-soluble ethyl acetate (EA) is miscible with water, so the interfacial mass transfer between EA and water occurs sufficiently, which leads to water molecules pass through the phase interface and diffuse into emulsion interior. Water molecules aggregate at the interface, and some merge into a large water drop in the central position of the emulsion. After evaporation of EA solvent, monodisperse EC microcapsules create large numbers of pits on the surface with a hollow structure. Curcumin is used as a model drug and embedded in the hollow structure. EC microcapsules have good, sustained drug release efficacy in a simulated intestinal environment, and the release process of EC microcapsules containing 6.14% drug-loaded capacity is fully consistent with the vitro drug release model. Such simple techniques for making EC microcapsules may open a window to the controlled preparation of other multifunctional microcapsules. Besides, it offers theoretical guidance for the study of EC microcapsules as drug carriers and expanding clinical application of curcumin.
研究领域:
药剂学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Qing He,Zhangxing Guo,Yu Cao,Min Yang,Shun Yao
For selective adsorption of main flavonoids from crude Tartary buckwheat extract (rutin, 0.021 mg/mL; quercetin, 0.030 mg/mL; and kaempferol, 0.011 mg/mL), new ionic liquid-based sorbents were successfully prepared by encapsulating [Bmim]Br and [Bmim]Pro in regular spherical non-magnetic and magnetic microcapsules with polysulfone content of 8%, respectively. After appropriate loading process, the microcapsules were comprehensively characterized by infrared spectroscopy, thermogravimetry analysis and scanning electron microscopy. Then the separation strategy was designed to separate rutin and quercetin from kaempferol by combinational use of two kinds of IL-loaded microcapsules (ILLMs). The effects of solid–liquid ratio of ILLMs and extract, pH, time and adsorption temperature were all investigated. The experimental data fit well with the quasi-second-order kinetics model and Langmuir model. After desorption, target flavonoids were well recovered and the ILLMs showed good stability. As the result, a new IL-based separation technology for main flavonoids from food crop was developed for the first time.
研究领域:
食品科学
·
分离技术
·
植物化学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Microbiology
·
2018
·
IF 4.019
Muhammad Zafarullah,Ramzan Rabia,Zhang Shanshan,Hu Haijuan,Hameed Ahsan,Bakry Amr M.,Dong Yongzhen,Wang Lufeng,Pan Siyi
Lead (Pb) is a well-recognized and potent heavy metal with non-biodegradable nature and can induce the oxidative stress, degenerative damages in tissues, and neural disorders. Certain lactic acid bacterial strains retain the potential to mitigate the lethal effects of Pb. The present work was carried out to assess the Pb bio-sorption and tolerance capabilities of Lactobacillus plantarum spp. Furthermore, potato resistant starch (PRS)-based microencapsulated and non-encapsulated L. plantarum KLDS 1.0344 was utilized for bioremediation against induced chronic Pb toxicity in mice. The experimental mice were divided into two main groups (Pb exposed and non-Pb exposed) and, each group was subsequently divided into three sub groups. The Pb exposed group was exposed to 100 mg/L Pb(NO3)2 via drinking water, and non-Pb exposed group was supplied with plain drinking water during 7 weeks prolonged in vivo study. The accumulation of Pb in blood, feces, renal, and hepatic tissues and its pathological damages were analyzed. The effect of Pb toxicity on the antioxidant enzyme capabilities in blood, serum, as well as, on levels of essential elements in tissues was also calculated. Moreover, KLDS 1.0344 displayed remarkable Pb binding capacity 72.34% and Pb tolerance (680 mg/L). Oral administration of both non- and PRS- encapsulated KLDS 1.0344 significantly provided protection against induced chronic Pb toxicity by increasing fecal Pb levels (445.65 ± 22.28 μg/g) and decreasing Pb in the blood up to 137.63 ± 2.43 μg/L, respectively. KLDS 1.0344 microencapsulated with PRS also relieved the renal and hepatic pathological damages and improved the antioxidant index by inhibiting changes in concentrations of glutathione peroxidase, glutathione, superoxide dismutase, malondialdehyde, and activated oxygen species, which were affected by the Pb exposure. Overall, our results suggested that L. plantarum KLDS 1.0344 either in free or encapsulated forms hold the potentiality to deliver a dietetic stratagem against Pb lethality.
研究领域:
环境生物学
·
微生物学
·
毒理学
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2021
·Vol. 13
·期 18
·3049
·
IF 4.329
Yuhua Zhang,Xi Zhang,Yurong Yan,Zhonghua Chen
Photochromic materials are interesting materials because of their color-changing property under UV light and visible light irradiation. However, they are vulnerable to many factors, such as pH oxygen, ion, solvent, etc. because of the unsaturated bonds existing on the photochromic molecular. Microencapsulation of the photochromic materials can separate them from the surroundings. Here, photochromic microcapsules using 3,3-Diphenyl-3H-naphtho[2,1-b] pyran (NP)/solution as core and polyurea as shell via interfacial polymerization were prepared, and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate (HALS 770) was used as photostabilizer. Fourier transform infrared spectroscopy (FTIR), a laser particle size analyzer, a scanning electron microscope (SEM), a thermogravimetric analyzer and an ultraviolet-visible spectrophotometer were used for characterization. The results showed that the microcapsules had a uniform particle size of about 0.56 μm when the percentage of the oil phase (core) in the emulsion was less than 15%, the addition amount of the emulsifier was 0.4%, and the stirring rate was 1800 r/min. The microcapsules showed better performance in thermal stability when the core/shell ratio was 1:1. The photostabilizer had little impact on the color-changing property of the microcapsule, but it could protect the microcapsules from UV light radiation aging.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Bingzhong Mo,Songping Mo,Lisi Jia,Zhibin Wang,Ying Chen
Inorganic salts are typically used phase change materials for high temperature thermal energy storage . Leakage and corrosion of phase change materials can be addressed by microencapsulation methods. However, microencapsulation of ethanol-soluble inorganic salts has not been reported. In this study, lithium nitrate (LiNO 3 ) as a model ethanol-soluble inorganic salt was microencapsulated in silica (SiO 2 ) by a novel method. Experimental results show that LiNO 3 was physically encapsulated by SiO 2 , confirming the formation of the microcomposites. The crystal structure of LiNO 3 was not changed during the microencapsulation process. The onset melting temperature and the melting enthalpy of the microcomposites stabilized at 250.9 °C and 265.2 kJ/kg after thermal cycles, demonstrating the effectiveness of the proposed method.
研究领域:
材料科学
·
热能存储
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2025
·
IF 1.6
Luping Gu,Cun Wang,Lei Ni,Zhiquan Chen,Danfeng Zhang,Juncheng Jiang,Yuanyuan Wang
To suppress thermal runaway during the synthesis process of tert -butyl peroxybenzoate (TBHB), phase change microcapsules (microPCMs) were prepared using paraffin as the core material and melamine-formaldehyde resin (MF) as the wall material via in situ polymerization. When the emulsification time was 20 min, the reaction temperature was 80 °C, and the paraffin mass was 10 g, the characterization of SEM, Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and x-ray photoelectron spectroscopy (XPS) confirmed that the microPCMs were successfully fabricated, with microcapsule encapsulation rate reaching 62.5 %. The investigation into the thermal runaway suppression effect of microPCMs during the synthesis of TBPB revealed that adding 5 g of microPCMs at 50 °C optimized overtemperature suppression, reducing the maximum temperature of the reaction system from 58.3 °C to 50.3 °C. This work expands the application of microPCMs in semi-batch reactions and has significant implications for the prevention of thermal runaway incidents.
研究领域:
材料科学
·
化学工程
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ao Men,Liangliang Xiong,Cong Cai,Xiaoqiang Fan,Minhao Zhu
A double-walled microcapsule was fabricated by integrating Ti 3 C 2 T x onto polysulfone through electrostatic self-assembly, effectively overcoming the limitations of conventional single-walled microcapsules, such as inadequate thermal stability, premature release and susceptibility to breakage. By incorporating Ti 3 C 2 T x @PSF microcapsule loaded with ionic liquid (IL) into the coating, a self-lubricating and self-repairing anti-wear and corrosion resistance epoxy coating was developed and evaluated. The coating exhibited an 83.24 % reduction in wear rate, attributed to the uniform lubricating films formed by the released IL and the broken Ti 3 C 2 T x microcapsule. Additionally, the enhanced thermal stability of the double-walled structure helps to prevent the uncontrolled loss of the ionic liquid. For corrosion resistance, the coating containing 10 wt% Ti 3 C 2 T x @PSF@IL demonstrated the ability to withstand up to 40 days of salt spray exposure before notable corrosion occurred. This noticeable performance is attributed to the enhanced interface between the microcapsules and resin, the extended diffusion path created by Ti 3 C 2 T x , and the adsorption effect of IL. Herein, this Ti 3 C 2 T x @PSF double-walled microcapsule loaded IL provides an effective solution for high-performance anticorrosive and wear-resistant epoxy coatings in harsh environments.
研究领域:
材料科学
·
表面工程
·
腐蚀防护
✓ 已验证
产品关联
DOI
高影响因子
AQUACULTURE INTERNATIONAL
·
2025
·Vol. 33
·期 1
·1-18
·
IF 2.4
Sha Yuanpu,Chen Yuhuan,Dong Jing,Gao Xiaofei,Yuan Huatao,Zhang Jingxiao,Gao Yunni,Li Xuejun
This study aims to verify the effects of astaxanthin microcapsules on the growth, physiology, and nutritional value of Cyprinus carpio ( C. carpio ), and evaluate the feasibility and safety of microcapsule technology in aquaculture. In this experiment, natural and synthetic astaxanthin were encapsulated in microcapsules, with empty microcapsules used as a control, and C. carpio was fed these diets for 8 weeks. Growth, muscle quality, and the antioxidant system were then assessed. The results showed that (1) the weight gain rate (WGR), specific growth rate (SGR), and condition factor (K) in group A (natural astaxanthin) and group B (synthetic astaxanthin) were significantly higher than those in the control group, with no significant differences in viscerosomatic index (VSI) or hepatosomatic index (HSI) across the groups. (2) Astaxanthin supplementation enhanced the antioxidant activity in the hepatopancreas of C. carpio . Total superoxide dismutase (T-SOD) activity significantly increased, malondialdehyde (MDA) levels decreased, while no significant changes were observed in total antioxidant capacity (T-AOC) or catalase (CAT) activity. The sod1 and gpx1a genes were significantly upregulated in group A. (3) Astaxanthin also improved muscle nutritional quality by significantly increasing crude protein content, reducing crude ash content, and enhancing water-holding capacity. Amino acid and fatty acid composition also showed improvement. Overall, this study suggests that natural astaxanthin may be superior to synthetic astaxanthin, and provides preliminary evidence that self-made astaxanthin microcapsules are safe for future aquaculture, offering a scientific basis for sustainable and eco-friendly aquaculture practices.
研究领域:
水产养殖学
·
营养学
·
分子生物学
✓ 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）