Pharmaceutics
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2023
·Vol. 15
·期 3
·731
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IF 5.4
De Bai,Fan Hu,Huixian Xu,Jiahong Huang,Chengyu Wu,Jiaheng Zhang,Rui Ye
Gravi-A nanoparticles, composed of retinyl propionate (RP) and hydroxypinacolone retinoate (HPR), were prepared by encapsulating the two using the high-pressure homogenization technique. The nanoparticles are effective in anti-wrinkle treatment with high stability and low irritation. We evaluated the effect of different process parameters on nanoparticle preparation. Supramolecular technology effectively produced nanoparticles with spherical shapes with an average size of 101.1 nm. The encapsulation efficiency was in the 97.98–98.35% range. The system showed a sustained release profile for reducing the irritation caused by Gravi-A nanoparticles. Furthermore, applying lipid nanoparticle encapsulation technology improved the transdermal efficiency of the nanoparticles, thereby allowing these to penetrate deep into the dermis layer to achieve precise and sustained release of active ingredients. Gravi-A nanoparticles can be extensively and conveniently used in cosmetics and other related formulations by direct application.Keywords:retinyl propionate;hydroxypinacolone retinoate;gravi-A nanoparticles;high stability;low irritation;transdermal delivery efficiency
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WATER RESEARCH
·
2023
·
IF 12.8
Junhui Zhang,Kuiling Li,Mengfei Xie,Qi Han,Li Feng,Dan Qu,Liqiu Zhang,Ke Wang
To unravel the low membrane fouling tendency and underlying membrane fouling mechanism of liquid-liquid hollow fiber membrane contactor (LL-HFMC) capturing ammonia from human urine, the ammonia flux decline trend, membrane fouling propensity, foulant-membrane thermodynamic interaction energy and microscale force analysis at different feed urine pH were comprehensively investigated. The 21-d continuous experiments showed that the ammonia flux decline trend and membrane fouling propensity significantly strengthened with the decrease of feed urine pH. The calculated foulant-membrane thermodynamic interaction energy decreased with the decreasing feed urine pH and agreed with the ammonia flux decline trend and membrane fouling propensity. The microscale force analysis showed that the absence of hydrodynamic water permeate drag force resulted in the foulant located at long distance from the membrane were difficult to approach the membrane surface, thus considerably alleviating membrane fouling. Additionally, the vital thermodynamic attractive force near the membrane surface increased with the decrease of feed urine pH, which made the membrane fouling further relieved at high pH condition. Therefore, the absence of water permeate drag force and operating at high pH condition minimized the membrane fouling during the LL-HFMC ammonia capture process. The obtained results provide a new insight into the low membrane tendency mechanism of LL-HFMC.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Jian Han,Feng Han,Jiaqing Wang,Yang Wei,Boris N. Kuznetsov,Yong Xu
Oxygen supply is one of the decisive factors of obligate aerobic microbial fermentation. Gluconobacter oxydans as a typical aerobic bacterium has excellent whole-cell catalysis and bio-oxidation ability to sugars and alcohols. By the dual function of oxygenation and alkali production of sodium percarbonate (SPC), the dissolved oxygen supply and pH stabilization was experimentally investigated and applied for the first time in G. oxydans fermentation. SPC performed a significant assisting effort to bio-oxidation performance by the in-situ oxygen supply and neutralization for whole-cell catalysis and bio-oxidation of lignocellulosic xylose , glucose, and glycerol. Compared with common aeration fermentation (and even the sealed pure-oxygen supplied mode), the bio-production of the three platform compounds xylonic acid, gluconic acid , and 1, 3-dihydroxyacetone was improved significantly by 45.7%, 28.4%, and 39.1%, respectively. In addition, the direct bioproduction of xylonic acid from the crude corncob sulfate hydrolysate was also improved by 17.3%. Within 4 h, 37.7 g/L of xylonic acid was produced in the fermentation tank, with a productivity of 9.4 g/L/h. The in-situ SPC assistance provides a simple and practical approach to intensify the bio-oxidation performance of G. oxydans for the whole-cell catalysis of high-value-added platform compounds from lignocellulosic feedstocks .
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Jiguang Huang,Haiping Chen,Jihao Yang,Ziwei Du,Heng Zhang,Zhaohao Li
Transport membrane condenser can efficiently recover water and heat from wet flue gas . Ceramic membrane is the heat and mass transfer medium in the process. However, the relationship between membrane property and the recovery performance is only partially reported based on current research state. This work focuses on the effects of permeability, material, and ceramic particle size of membrane on the water and heat recovery. Membranes were prepared from three different sizes of coal fly ash and an alumina powder. Water and heat recovery performances of the membranes are experimentally compared. Results indicate that increasing membrane permeability improves water and heat recovery because the resistance of heat and mass transfer is reduced. The alumina membrane performs 3–10% more water recovery than the coal fly ash-based membrane while thermal conductivity of the alumina membrane was 11.5 times that of the coal fly ash-based membrane. Increasing ceramic particle size shows two opposite effects on the water and heat recovery, promotion because of the permeability rising, and undermine because of the thermal conductivity reduction. Low-cost membranes with high permeability and high thermal conductivity are recommended in transport membrane condenser application.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Zhaomeng Long,Wenjun Wang,Yue Zhou,Laiming Yu,Luting Shen,Yubing Dong
In this work, the starch/polybutylene adipate terephthalate (PBAT) composite films with high starch content were prepared by hot-pressing and ultraviolet cross-linking methods using cassava starch, benzophenone (BP), degradable PBAT and citric acid as film-forming substrate, photosensitizer, toughening material and solvent, respectively. The results showed that starch and PBAT had excellent performance, resulting in the composites films exhibit robust tensile strength (9.90 MPa), decent elongation at break (500.05 %) and excellent shape memory property. Under 30 % pre-tensile strain, the shape memory fixity and recovery ratios reached 96.58 % and 93.94 %, respectively. In addition, the starch-based films were successfully rendered hydrophobic by PBAT hydrophobic characteristics. PBAT not only secures the biodegradability of the starch/PBAT composites films, but also improves the mechanical properties of them, and meets the requirements of the thermal shrinkage films when subjected to large strain.
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Advanced Materials Technologies
·
2023
·Vol. 8
·期 13
·2202062
·
IF 6.8
Runni Wu,Kin Wa Kwan,Yahua Wang,Alfonso Hing Wan Ngan
Soft materials with large actuation and strain sensing are highly sought after for robotic applications. There are several electrochemical material systems capable of both functions, but as they are developed into air-working systems, the deformation is compromised by the electrolyte packaging so that they actuate less than in liquid environments. This study develops a novel air-working film-actuator by compositing manganese dioxide, which actuates by electrochemical redox reactions, and gelatin-glycerol hydrogel, which serves not only as the electrolyte for the manganese dioxide but also provides strain sensing function. By properly designing the compositions of the materials and structure, the composite film can produce large bending actuation. Depending on the application and structure adopted, the actuator can produce a tip displacement equal to its own length, a bending angle of >360°, or a radius of curvature of 2.5 mm, which is a very large actuation compared to other air-working film actuators. Different bending modes or shapes can be achieved by the independent actuating hinges fabricated on the actuator, and strain sensing function and resilient recovery from external compression are achievable by the hydrogel. With these properties, the material system is used to fabricate a robotic inchworm to demonstrate its capability in robotic applications.
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CHEMOSPHERE
·
2023
·
IF 8.8
Jingjing Liu,Xiang Qin,Xiaoping Feng,Fengming Li,Jun Liang,Dongying Hu
Progress toward the high water flux of cellulose acetate butyrate (CAB)-based reverse osmosis (RO) membrane is a bottleneck for desalination and mitigation of fresh water shortage. Here, we develop an “optimization of formulation-induced structure” strategy using acetone (solvent), triethyl phosphate (pore-inducing agent), glycerin and n-propanol (boosters), which achieves a state-of-the-art salt rejection of 97.1% and permeate flux of 8.73 L m −2 ·h −1 , ranking top among CAB-based RO membrane. Compared with reported literatures, it represents high separation performance for different concentrations (20–100 mg L −1 ) of Rhodamine B and Congo red, different ion types (NaCl and MgCl 2 ), different time (600 min), and resistance to feed pressure changes. The key is the appropriate viscosity of the casting solution (995.52 mPa s), the synergy between the components and additives, contributing to the formation of “jellyfish"-like microscopic pore structure with the lowest surface roughness (Ra = 16.3) and good hydrophilicity. The proposed correlation mechanism between additive-optimized micro-structure and desalination provides a promising prospect for CAB-based RO membrane.
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ACS Applied Polymer Materials
·
2023
·
IF 5
Tianya Chen,Hangcheng Zhu,Xinyi Chen,Shuang Zheng,Fugen Liang,Fei Yang,Shujuan Yang,Yong Zhang
Selectivity and antifouling of ultrafiltration (UF) membranes are major challenges in the separation and purification of biological proteins. This work reported that full-coverage spongy poly(ether sulfone) (PES) ultrafiltration membranes assisted by the self-cross-linking of N-hydroxyethyl acrylamide (HEAA) were fabricated via a phase inversion method at room temperature. The pore structure of the UF membrane from finger-like to coverage of the spongy structure occurred by increasing the content of HEAA, which is beneficial for size-selective separation of biomolecules. The optimized M4 membrane showed a high surface porosity with a uniform pore size of 30 nm, resulting in more than 99% protein rejection rate for immunoglobulin G (IgG) but less than 20% rejection for bovine serum albumin, confirming that the molecular weight cutoff is 100k Da. Furthermore, the fabricated PES composite ultrafiltration membranes showed excellent antifouling performance and flux recovery efficiency for proteins due to the hydrophilic group of HEAA. This study provides an intelligent strategy for fouling prevention and selective isolation of proteins.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Yi Zhong,Chenglin Wu,Daimei Chen,Jinzhong Zhang,Yanmei Feng,Kang Xu,Weichang Hao,Hao Ding,Guocheng Lv,Yi Du,Lianzhou Wang
As 2D heterojunction photocatalysts, lateral heterojunctions (LHs) formed based on chemical bonding generally exhibit much higher photocarrier separation efficiency than vertical heterojunctions (VHs) formed by van der Waals bonds. However, little is known about the different detailed interfacial structures and photocarrier separation mechanisms of the two heterojunctions. Herein, 2D BiOCl and Bi 4 O 5 I 2 were selected as model building blocks to construct BiOCl/Bi 4 O 5 I 2 VHs and LHs. The LHs with direct charge carrier transport channels show stronger interfacial electric field and higher charge transfer efficiency than the VHs. The photogenerated charge carrier migration pathway in the LHs follows a Z-scheme model, while the VHs fits a type II model. As a result, the BiOCl/Bi 4 O 5 I 2 LHs exhibited higher redox performance than the VHs, which is 1.55, 1.56 and 2.1 times better for H 2 production, Cr(VI) photoreduction and phenol photodegradation , respectively. This study demonstrates a new approach to constructing highly efficient facet-dependent 2D heterojunction photocatalysts.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Chen Zhe,Li Jili,Meng Lingshen,Li Jianan,Hao Yaming,Jiang Tao,Yang Xuejing,Li Yefei,Liu Zhi-Pan,Gong Ming
Simultaneously achieving abundant and well-defined active sites with high selectivity has been one of the ultimate goals for heterogeneous catalysis. Herein, we construct a class of Ni hydroxychloride-based inorganic-organic hybrid electrocatalysts with the inorganic Ni hydroxychloride chains pillared by the bidentate N-N ligands. The precise evacuation of N-N ligands under ultrahigh-vacuum forms ligand vacancies while partially retaining some ligands as structural pillars. The high density of ligand vacancies forms the active vacancy channel with abundant and highly-accessible undercoordinated Ni sites, exhibiting 5-25 fold and 20-400 fold activity enhancement compared to the hybrid pre-catalyst and standard β-Ni(OH) 2 for the electrochemical oxidation of 25 different organic substrates, respectively. The tunable N-N ligand can also tailor the sizes of the vacancy channels to significantly impact the substrate configuration leading to unprecedented substrate-dependent reactivities on hydroxide/oxide catalysts. This approach bridges heterogenous and homogeneous catalysis for creating efficient and functional catalysis with enzyme-like properties.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yonglin He,Fayin Ye,Jianming Tao,Zehua Zhang,Guohua Zhao
Ozonation is an efficient method for improving the technical performance of some starches, but the feasibility of its use for sweet potato starch remains unknown. The effects of aqueous ozonation on the multi-scale structure and physicochemical properties of sweet potato starch were explored. Structurally, ozonation did not generate significant alterations at the granular level (size, morphology, lamellar structure, and long-range and short-range ordered structures), but led to tremendous changes at the molecular level, including converting hydroxyl groups to carbonyl and carboxyl groups and depolymerizing starch molecules. These structural changes resulted in prominent alternations in the technological performance of sweet potato starch, such as increases in water solubility and paste clarity and decreases in water absorption capacity, paste viscosity, and paste viscoelasticity . For these traits, their amplitudes of variation elevated when the ozonation time was extended and peaked at the longest ozonation time (60 min). The greatest changes in paste setback (30 min), gel hardness (30 min), and the puffing capacity of the dried starch gel (45 min) were observed at moderate ozonation times. In summary, aqueous ozonation is a new method for fabricating sweet potato starch with improved functionality.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Hongjie Yu,Wenxin Wang,Qiqi Mao,Kai Deng,Ziqiang Wang,You Xu,Xiaonian Li,Hongjing Wang,Liang Wang
By combining hydrogen evolution reaction (HER) with glycerol oxidation reaction (GOR), high-value chemicals can be obtained at the anode while saving energy to produce hydrogen. Herein, we synthesized Pt SA -NiCo LDHs/NF by anchoring oxygen vacancies in NiCo LDHs with Pt to form Pt-O 5 coordination. Density functional theory (DFT) revealed that Pt SA reduced the d -band center and optimized ΔG H* . During HER, LDHs act as active sites to catalyze H-OH cleavage and promote the dissociation of H 2 O, while Pt single atoms act as the binding sites for H intermediates, and Pt-O bonds accelerate proton-electron coupling and promote the release of H 2 molecules. In HER//GOR, a cell voltage of only 1.37 V is required to provide a current density of 100 mA cm −2 and to produce formate at the anode. This work enables energy-saving hydrogen production and high-value chemicals at the anode, a novel green electrocatalytic synthesis strategy with synergistic coupling and dual promotion.
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