Advanced Powder Technology最新文献

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Solventless-mixing particle coating using a high shear mixer for preparing coated pellets using dry methyl methacrylate and diethylaminoethyl methacrylate copolymer latex

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-21 DOI: 10.1016/j.apt.2025.104829

Keita Kondo, Shoko Mata, Toshiyuki Niwa

The aim of this study was to investigate the feasibility of coated pellet formulation by high shear mixing of drug pellets and polymer particles without solvent or heat. First, drug-layered pellets were prepared by high shear mixing of drug crystals and sugar-cellulose pellets. Second, aqueous methyl methacrylate and diethylaminoethyl methacrylate copolymer latex was solidified by freeze drying to produce dry latex comprising colloidal polymer. Finally, the resulting pellets and latex were exposed to high shear mixing, and the obtained coated pellets were characterized. The freeze-dried latex exhibited high coating performance due to its fragile characteristics, which were due to the lack of close contacts between the colloids. This latex was easily pulverized by high shear mixing with the pellets, and the resulting fragments were then deposited on the surface of the pellets. We examined additional coatings: after high shear mixing of the drug-layered pellets and latex particles, fresh latex was added and mixed with the coated pellets. This process provided coated pellets with thick and dense polymer layers, which could suppress initial drug release after annealed at 80 °C for 6 h. The dissolution was dependent on the coating thickness, which was determined by controlling the amount of coated polymer.

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引用次数: 0

Modulating hygroscopicity and compression performance in chewable mannitol-xylitol tablets: Effects of relative humidity and magnesium stearate

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-21 DOI: 10.1016/j.apt.2025.104816

Yu Zhang , Hongyue Liu , Ge Zhong , Junmeng Xu , Jia Zeng , Fan Zhao , Jinru Hu , Chun Qiao , Li Qin , Ruofei Du

This study aims to investigate the effects of the relative humidity and formulation ratio on the hygroscopicity, tableting performance, and physical stability of polyols (mannitol and xylitol) as fillers in chewable tablets. To address the issues of hygroscopicity and sticking during tableting of chewable tablets containing polyol fillers, a systematic analysis was conducted by adjusting the ratio of mannitol and xylitol, and adding magnesium stearate (Mgst) as lubricant. The study investigated changes in hygroscopicity of the powder blends, tablet compressive force (F), and increment in ejection force (ΔEF) under varying humidity and formulation conditions. The porosity, tensile strength, and disintegration time of the tablets were also measured and analyzed to investigate the effects of humidity and formulation factors on tablet quality. The results indicate that increasing the mannitol content significantly reduces the hygroscopicity and moisture content of the powder blends. Higher levels of Mgst and mannitol improve the sticking issues in compression. However, an increase in mannitol content may decrease tablet porosity, leading to a longer disintegration time. Under high humidity conditions, increasing the amounts of mannitol can reduce the polymorphic transformation tendency of xylitol and enhance the hardness stability of the chewable tablets. This study reveals the significant effects of relative humidity and the mannitol-xylitol ratio on powder hygroscopicity, compaction performance, and tablet quality, providing a theoretical basis for optimizing formulations containing polyol fillers under controlled humidity conditions. The findings offer important references for adjusting process parameters in actual production, with particular guidance on improving tablet physical stability, anti-sticking performance, and disintegration control.

{"title":"Modulating hygroscopicity and compression performance in chewable mannitol-xylitol tablets: Effects of relative humidity and magnesium stearate","authors":"Yu Zhang , Hongyue Liu , Ge Zhong , Junmeng Xu , Jia Zeng , Fan Zhao , Jinru Hu , Chun Qiao , Li Qin , Ruofei Du","doi":"10.1016/j.apt.2025.104816","DOIUrl":"10.1016/j.apt.2025.104816","url":null,"abstract":"<div><div>This study aims to investigate the effects of the relative humidity and formulation ratio on the hygroscopicity, tableting performance, and physical stability of polyols (mannitol and xylitol) as fillers in chewable tablets. To address the issues of hygroscopicity and sticking during tableting of chewable tablets containing polyol fillers, a systematic analysis was conducted by adjusting the ratio of mannitol and xylitol, and adding magnesium stearate (Mgst) as lubricant. The study investigated changes in hygroscopicity of the powder blends, tablet compressive force (F), and increment in ejection force (ΔEF) under varying humidity and formulation conditions. The porosity, tensile strength, and disintegration time of the tablets were also measured and analyzed to investigate the effects of humidity and formulation factors on tablet quality. The results indicate that increasing the mannitol content significantly reduces the hygroscopicity and moisture content of the powder blends. Higher levels of Mgst and mannitol improve the sticking issues in compression. However, an increase in mannitol content may decrease tablet porosity, leading to a longer disintegration time. Under high humidity conditions, increasing the amounts of mannitol can reduce the polymorphic transformation tendency of xylitol and enhance the hardness stability of the chewable tablets. This study reveals the significant effects of relative humidity and the mannitol-xylitol ratio on powder hygroscopicity, compaction performance, and tablet quality, providing a theoretical basis for optimizing formulations containing polyol fillers under controlled humidity conditions. The findings offer important references for adjusting process parameters in actual production, with particular guidance on improving tablet physical stability, anti-sticking performance, and disintegration control.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104816"},"PeriodicalIF":4.2,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The establishment and application of a novel spherical sensor based on three-axis accelerometer

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.apt.2025.104830

Hengjun Li , Shaojian Ma , Xiaojing Yang , Pengyan Zhu , Dingzheng Wang , Yuan Li , Jinlin Yang

The grinding media serves as a source of energy during the grinding process, making it a crucial component of this operation. This study introduces a novel spherical sensor by integrating a three-axis accelerometer within a grinding media ball. Through mechanical motion and grinding experiments, the acceleration data obtained were analyzed using the principles of three-axis accelerometer. The primary conclusion of this study is the establishment of motion characteristic models for the cascading, throwing, and centrifugal states of novel spherical sensor within the mill. These models were successfully applied to industrial grinding, enabling the determination of the motion state of the grinding media under various experimental conditions. These findings provide both a theoretical and a modeling foundation for future investigations into the motion states of grinding media in various grinding and powder processing applications.

引用次数: 0

Study on the surface modification and activation mechanism of lime-depressed pyrite by Cu(II) species

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-20 DOI: 10.1016/j.apt.2025.104831

Liang Wang , Yu Chen , Bihan Wei , Han Wang , Peilun Shen , Dianwen Liu

Pyrite is frequently encountered in conjunction with other sulfide minerals and is commonly subjected to depression by lime during mineral processing, which aim to isolate and concentrate precious minerals. In light of the continuous exhaustion of Earth’s mineral wealth, the retrieval of pyrite that has been hindered by lime deposits has emerged as a pressing concern and a top priority. This study explored the use of Cu(II) to activate lime-depressed pyrite. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis) spectrophotometers, and contact angle tests were utilized to reveal the activation mechanism of Cu(II) on lime-depressed pyrite. These techniques were employed to analyze surface morphology and characteristics, spectral characteristics, adsorption capacity for collectors, and surface hydrophobicity. The surface morphology and spectral characteristics analyze indicated that the addition of Cu(II) led to the dissolution of hydroxyl and sulfate species on lime-depressed surfaces, and results in the formation of new copper sulfide and Fe-O-Cu species. These newly generated copper species enhanced the adsorption capacity of collectors on the pyrite surfaces, thus improving the hydrophobicity of pyrite. After Cu(II) treatment, the lime-depressed pyrite exhibited improved recoverability through flotation, ultimately achieving a peak recovery of 81.50%.

{"title":"Study on the surface modification and activation mechanism of lime-depressed pyrite by Cu(II) species","authors":"Liang Wang , Yu Chen , Bihan Wei , Han Wang , Peilun Shen , Dianwen Liu","doi":"10.1016/j.apt.2025.104831","DOIUrl":"10.1016/j.apt.2025.104831","url":null,"abstract":"<div><div>Pyrite is frequently encountered in conjunction with other sulfide minerals and is commonly subjected to depression by lime during mineral processing, which aim to isolate and concentrate precious minerals. In light of the continuous exhaustion of Earth’s mineral wealth, the retrieval of pyrite that has been hindered by lime deposits has emerged as a pressing concern and a top priority. This study explored the use of Cu(II) to activate lime-depressed pyrite. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis) spectrophotometers, and contact angle tests were utilized to reveal the activation mechanism of Cu(II) on lime-depressed pyrite. These techniques were employed to analyze surface morphology and characteristics, spectral characteristics, adsorption capacity for collectors, and surface hydrophobicity. The surface morphology and spectral characteristics analyze indicated that the addition of Cu(II) led to the dissolution of hydroxyl and sulfate species on lime-depressed surfaces, and results in the formation of new copper sulfide and Fe-O-Cu species. These newly generated copper species enhanced the adsorption capacity of collectors on the pyrite surfaces, thus improving the hydrophobicity of pyrite. After Cu(II) treatment, the lime-depressed pyrite exhibited improved recoverability through flotation, ultimately achieving a peak recovery of 81.50%.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104831"},"PeriodicalIF":4.2,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxidation and laser ignition characteristics of Mn, Mo, Ta, and W powders in oxygen-rich environments

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-19 DOI: 10.1016/j.apt.2025.104828

Xiangrui Zou , Chao Wang , Wenju Yang , Chaoqi Xu , Rui Xue

Manganese (Mn), molybdenum (Mo), tantalum (Ta), and tungsten (W) powders offer exceptional properties such as high strength, combustibility, and substantial volumetric combustion enthalpy, making them valuable for aerospace and industrial applications. This study investigates their oxidation and burning characteristics through thermogravimetric-differential scanning calorimetry and high-pressure combustion tests. Onset oxidation temperatures were determined as 340.23 °C, 475.01 °C, 523.90 °C, and 535.70 °C for Mn, Mo, Ta, and W, respectively. Mn forms Mn₂O₃ and Mn₃O₄, with combustion products exhibiting surface holes as substance migration channels. Mo and W form volatile oxides (MoO₃, WO₃) sublimating above 800 °C and 1200 °C, respectively, while Ta forms stable Ta₂O₅. Luminous intensity measurements quantified combustion evolution, revealing ignition delay times of 64 ms, 77.5 ms, 97.8 ms, and 128 ms for Mn, Mo, Ta, and W under 0.5 MPa oxygen, with Mn and Ta showing intense flames and faster reaction rates. Scanning electron microscope and X-ray diffraction analyses identified Mn₃O₄, MoO₃, Ta₂O₅, and WO₃ as primary combustion products. This study provides insights into the oxidation and combustion behaviors of high-density metal powders, supporting improved safety in powder metallurgy, 3D printing, and energetic material design.

{"title":"Oxidation and laser ignition characteristics of Mn, Mo, Ta, and W powders in oxygen-rich environments","authors":"Xiangrui Zou , Chao Wang , Wenju Yang , Chaoqi Xu , Rui Xue","doi":"10.1016/j.apt.2025.104828","DOIUrl":"10.1016/j.apt.2025.104828","url":null,"abstract":"<div><div>Manganese (Mn), molybdenum (Mo), tantalum (Ta), and tungsten (W) powders offer exceptional properties such as high strength, combustibility, and substantial volumetric combustion enthalpy, making them valuable for aerospace and industrial applications. This study investigates their oxidation and burning characteristics through thermogravimetric-differential scanning calorimetry and high-pressure combustion tests. Onset oxidation temperatures were determined as 340.23 °C, 475.01 °C, 523.90 °C, and 535.70 °C for Mn, Mo, Ta, and W, respectively. Mn forms Mn<sub>2</sub>O<sub>3</sub> and Mn<sub>3</sub>O<sub>4</sub>, with combustion products exhibiting surface holes as substance migration channels. Mo and W form volatile oxides (MoO<sub>3</sub>, WO<sub>3</sub>) sublimating above 800 °C and 1200 °C, respectively, while Ta forms stable Ta<sub>2</sub>O<sub>5</sub>. Luminous intensity measurements quantified combustion evolution, revealing ignition delay times of 64 ms, 77.5 ms, 97.8 ms, and 128 ms for Mn, Mo, Ta, and W under 0.5 MPa oxygen, with Mn and Ta showing intense flames and faster reaction rates. Scanning electron microscope and X-ray diffraction analyses identified Mn<sub>3</sub>O<sub>4</sub>, MoO<sub>3</sub>, Ta<sub>2</sub>O<sub>5</sub>, and WO<sub>3</sub> as primary combustion products. This study provides insights into the oxidation and combustion behaviors of high-density metal powders, supporting improved safety in powder metallurgy, 3D printing, and energetic material design.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104828"},"PeriodicalIF":4.2,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Milling-based extraction and characterization of Bombyx mori silk glands and fibroin powder for biomaterial use

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-16 DOI: 10.1016/j.apt.2025.104820

Norihiro Yoshida , Mayumi Tsukada , Masayuki Horio , Akio Nonaka , Akira Nonaka , I. Wuled Lenggoro

This study presents an approach for the extraction of silk glands from Bombyx mori silkworms using a scalable wet milling process, eliminating the need for traditional cocoon processing. We developed a method to harvest silk glands, followed by dry-milling to generate fibroin powders. This technique allows for on-demand extraction by storing silkworms in ethanol aqueous systems or freeze conditions. We systematically investigated the influence of ethanol and freeze-pretreatments on the properties of the extracted silk materials. Ethanol-pretreatment was found to decrease the hardness of silk glands after degumming, while freeze-pretreatment enhanced hardness and introduced a porous structure. Additionally, freeze-pretreated silk powders exhibited larger particle sizes and higher crystallinity compared to those treated with ethanol. These findings highlight the potential of using silk glands as sustainable alternatives to plastics and open new avenues for advanced biomaterial applications.

引用次数: 0

Particle tracking velocimetry study of wet particle flow in a pseudo two-dimensional fluidized bed

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-13 DOI: 10.1016/j.apt.2025.104819

Zhiyang Ma , Yi Xu , Qiuya Tu , Haigang Wang

In particle preparation, likes drying, coating and granulation, the flow characteristics of wet particles in the fluidized bed are extremely complex due to the effect of water content. It is essential to investigate the flow characteristics of wet particles for optimizing process efficiency and ensure the end-point product quality. In this research, a high-speed camera was employed to conduct experimental investigation for wet particles flow within a pseudo two-dimensional fluidized bed. The flow dynamics of wet particles under different water contents and different inlet gas velocities were investigated. The particle tracking velocimetry (PTV) measurement was explored to observe the particle movement in specific regions, including particle velocity distribution and particle concentration. A digital imaging method, i.e. Voronoi method, was utilized to address particle allocation challenges, providing a foundation for calculating intricate parameters such as solid-phase flow field, granular temperature and solid volume fraction. These parameters were calculated based on the essential information derived from the Lagrangian trajectories of particles, which enriched the understanding of complex interactions in the wet particle flow dynamics system.

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引用次数: 0

Effect of oxalic acid on the selective flotation separation of Pb-activated sphalerite from galena

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-13 DOI: 10.1016/j.apt.2025.104818

Doaa Ashraf Eladl , Gde Pandhe Wisnu Suyantara , Hajime Miki , Akbarshokh Ulmaszoda , Naoko Okibe

The separation of sphalerite (ZnS) and galena (PbS) is challenging owing to activation of the sphalerite surface by unavoidable metal ions, such as lead ions (Pb²⁺) released from lead-containing minerals. In this study, oxalic acid (OA) was applied for the first time as an environmentally friendly reagent to deactivate the sphalerite surface in lead–zinc (Pb-Zn) flotation separation. Micro-flotation experiments showed that OA, at a concentration of 0.56 mM, significantly reduced sphalerite recovery. Single-mineral flotation tests demonstrated that sphalerite recovery decreased to 20 %, while galena recovery remained at 58.7 % after OA treatment. Further flotation tests on an artificial mixture of sphalerite and galena confirmed effective separation with OA treatment under mildly alkaline conditions, achieving recoveries of 83 % for galena and 17 % for sphalerite. Infrared spectroscopy and X-ray photoelectron spectroscopy analyses showed that OA removes Pb²⁺ ions from the surface of sphalerite by forming lead oxalate (Pb(II)-Ox) precipitates, which detach from the sphalerite surface, effectively cleaning it. This detachment prevents the adsorption of potassium amyl xanthate (PAX) by forming a dispersed lead oxalate-amyl xanthate (PbOx-AX) complex, which exposes the hydrophilic sphalerite surface and leads to its depression. In contrast, this interaction had a minimal impact on the floatability of galena.

{"title":"Effect of oxalic acid on the selective flotation separation of Pb-activated sphalerite from galena","authors":"Doaa Ashraf Eladl , Gde Pandhe Wisnu Suyantara , Hajime Miki , Akbarshokh Ulmaszoda , Naoko Okibe","doi":"10.1016/j.apt.2025.104818","DOIUrl":"10.1016/j.apt.2025.104818","url":null,"abstract":"<div><div>The separation of sphalerite (ZnS) and galena (PbS) is challenging owing to activation of the sphalerite surface by unavoidable metal ions, such as lead ions (Pb<sup>2+</sup>) released from lead-containing minerals. In this study, oxalic acid (OA) was applied for the first time as an environmentally friendly reagent to deactivate the sphalerite surface in lead–zinc (Pb-Zn) flotation separation. Micro-flotation experiments showed that OA, at a concentration of 0.56 mM, significantly reduced sphalerite recovery. Single-mineral flotation tests demonstrated that sphalerite recovery decreased to 20 %, while galena recovery remained at 58.7 % after OA treatment. Further flotation tests on an artificial mixture of sphalerite and galena confirmed effective separation with OA treatment under mildly alkaline conditions, achieving recoveries of 83 % for galena and 17 % for sphalerite. Infrared spectroscopy and X-ray photoelectron spectroscopy analyses showed that OA removes Pb<sup>2+</sup> ions from the surface of sphalerite by forming lead oxalate (Pb(II)-Ox) precipitates, which detach from the sphalerite surface, effectively cleaning it. This detachment prevents the adsorption of potassium amyl xanthate (PAX) by forming a dispersed lead oxalate-amyl xanthate (PbOx-AX) complex, which exposes the hydrophilic sphalerite surface and leads to its depression. In contrast, this interaction had a minimal impact on the floatability of galena.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 4","pages":"Article 104818"},"PeriodicalIF":4.2,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

2024 reviewer appreciation

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-10 DOI: 10.1016/j.apt.2025.104808

引用次数: 0

Modification of ultrafine silk fibroin powder for efficient oil/water separation

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-02-08 DOI: 10.1016/j.apt.2025.104817

Jian Huang , Yunshan Mao , Yunli Wang , Weilin Xu

In this study, silk fibroin powder (SFP) was modified using silane coupling agent vinyltrimethoxysilane (KH 171) to produce hydrophobic particles with micro–nanostructure. A series of tests and analyses on the microstructure and properties of the SFP before and after the modification show that silane oligomer (PSO) nanoparticles are formed on the SFP after the modification with KH 171, reducing its surface energy and constructing micro–nanoscale rough structures. Moreover, the modified SFP can maintain a high hydrophobicity after long-term washing. The hydrophobic modification of SFP has no significant effect on its crystal structure, but markedly improves its thermal stability by introducing PSO nanoparticles. A comparative study was performed on the samples of original SFP, KH 171-modified SFP, PSO nanoparticles, and SFP + PSO mixture using FTIR, TGA, and contact angle measurements. The results provide compelling evidence from different perspectives that the PSO nanospheres, formed by the hydrolysis and condensation of KH 171, are covalently bonded to the SFP, not just simple physical adsorption. This system successfully separated several oil/water mixtures and water-in-oil emulsions, with separation efficiencies of 99.1 % and 99.95 %, respectively. This indicates that the hydrophobic modification of the SFP and its use as a material for oil/water separation have practical feasibility. This provides new concepts for the recovery and reuse of discarded silk fibers, expands the application fields of SFP, and has good application prospects.

{"title":"Modification of ultrafine silk fibroin powder for efficient oil/water separation","authors":"Jian Huang , Yunshan Mao , Yunli Wang , Weilin Xu","doi":"10.1016/j.apt.2025.104817","DOIUrl":"10.1016/j.apt.2025.104817","url":null,"abstract":"<div><div>In this study, silk fibroin powder (SFP) was modified using silane coupling agent vinyltrimethoxysilane (KH 171) to produce hydrophobic particles with micro–nanostructure. A series of tests and analyses on the microstructure and properties of the SFP before and after the modification show that silane oligomer (PSO) nanoparticles are formed on the SFP after the modification with KH 171, reducing its surface energy and constructing micro–nanoscale rough structures. Moreover, the modified SFP can maintain a high hydrophobicity after long-term washing. The hydrophobic modification of SFP has no significant effect on its crystal structure, but markedly improves its thermal stability by introducing PSO nanoparticles. A comparative study was performed on the samples of original SFP, KH 171-modified SFP, PSO nanoparticles, and SFP + PSO mixture using FTIR, TGA, and contact angle measurements. The results provide compelling evidence from different perspectives that the PSO nanospheres, formed by the hydrolysis and condensation of KH 171, are covalently bonded to the SFP, not just simple physical adsorption. This system successfully separated several oil/water mixtures and water-in-oil emulsions, with separation efficiencies of 99.1 % and 99.95 %, respectively. This indicates that the hydrophobic modification of the SFP and its use as a material for oil/water separation have practical feasibility. This provides new concepts for the recovery and reuse of discarded silk fibers, expands the application fields of SFP, and has good application prospects.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 3","pages":"Article 104817"},"PeriodicalIF":4.2,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143373017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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