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Development and Characterization of Pineapple Fiber-Based Absorbent Cores for Eco-friendly Sanitary Pads

Fibers and Polymers 2025年第7期26卷 3227-3241页

作者： Acquah, Jephtah Ogyefo Nettey-Oppong, Ezekiel Edward Mensah, Emmanuel Essel Kayaba, Abdul Manan Asare, Eric Department of Materials Engineering Kwame Nkrumah University of Science and Technology Kumasi Ghana Department of Biomedical Engineering Yonsei University Wonju Korea Republic of Department of Materials Science and Engineering Egypt–Japan University of Science and Technology Alexandria Egypt

Menstrual hygiene is a critical aspect of women’s health, with sanitary pads being the most commonly used products for managing menstrual flow. However, conventional sanitary pads are often made from non-biodegradable materials, posing significant environmental and health challenges. This study explores the potential of using fibers extracted from pineapple crown leaflets as an eco-friendly and sustainable alternative for the absorbent cores of sanitary pads. We subjected the fibers to an alkali treatment process using sodium hydroxide, and their performance was evaluated through a series of tests, including absorbency, retention, and strike-through time. The treated fibers demonstrated enhanced absorbency, with percentages ranging from 652.74% to 706.34%, and retention capacities between 644.35% and 683.48%. These values surpass those of both untreated fibers and commercial absorbent cores. Additionally, the treated fibers had a faster strike-through time, averaging 1.86 s, compared to 2.04 s for the commercial product. The yield of pineapple crown fibers was calculated to range from 4.075% to 5.365%, highlighting the efficiency of the extraction process. The findings of this study suggest that treated pineapple crown fibers offer superior performance and environmental benefits over conventional materials, positioning them as a promising alternative for sustainable menstrual hygiene products. © The Author(s), under exclusive licence to the Korean Fiber Society 2025.

关键词： Sanitation

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Dual-compressed photoacoustic single-pixel imaging

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National science Review 2023年第1期10卷 187-195页

作者： Yuning Guo Baowen Li Xiaobo Yin Department of Mechanical Engineering University of Colorado Department of Material Science and Engineering Department of Physics Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Materials Science and Engineering Program University of Colorado

Photoacoustic imaging,an acoustic imaging modality with potentially optical resolution in an optical turbid medium,has attracted great ***,the convergence of wavefront optimization and raster scanning in computational photoacoustic imaging leads to the challenge of fast mapping,especially for a spatial resolution approaching the acoustic deep-subwavelength *** a sparse sampling paradigm,compressive sensing has been applied in numerous fields to accelerate data acquisition without significant quality *** this work,we propose a dual-compressed approach for photoacoustic surface tomography that enables high-efficiency imaging with 3D spatial resolution unlimited by the acoustics in a turbid *** dual-compressed photoacoustic imaging with single-pixel detection,enabled by spatially optical modulation with synchronized temporally photoacoustic coding,allows decoding of the fine optical information from the modulated acoustic signal even when the variance of original photoacoustic signals is *** perform a proof-of-principle numerical demonstration of dual-compressed photoacoustic imaging, that resolves acoustic sub-acoustic-wavelength details with a significantly reduced number of measurements,revealing the potential for dynamic *** dual-compressed concept,which transforms unobtrusive spatial difference into spatio-temporal detectable information,can be generalized to other imaging modalities to re alize efficient,high-spatial-resolution imaging.

关键词： photoacoustic imaging compressive sensing single-pixel imaging surface tomography

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SiNx Coating Deposition on CoCr by Plasma-Enhanced Chemical Vapor Deposition

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biomedical materials and Devices 2024年第1期2卷 376-383页

作者： Zhou, Huasi Persson, Cecilia Xia, Wei Engqvist, Håkan Division of Applied Materials Science Department of Materials Science and Engineering Uppsala University Division of Biomedical Engineering Department of Materials Science and Engineering Uppsala University

Cobalt chromium alloys (CoCr) are commonly used as total disc replacement components. However, there are concerns about its long-term biological effects. Coating the CoCr with a ceramic could improve the implant’s biocompatibility and wear resistance. Silicon nitride (SiNx) coatings have emerged as a recent alternative to this end. While many have evaluated physical vapour deposition (PVD) techniques to deposit these coatings, plasma-enhanced chemical vapour deposition (PECVD) may provide certain advantages. For example, it may allow for low-temperature depositions as well as more uniform coatings of complex structures. In this study, silicon nitride (SiNx) coatings with different nitrogen-to-silicon (N/Si ratio) compositions (0.65, 1.16 and 1.42) were deposited onto CoCr substrates by PECVD. It was found that the SiNx coating deposited at an NH₃ flow rate of 30 sccm (i.e., N/Si ratio of 1.42), had the highest hardness and elastic modulus, 13.19 ± 1.29 GPa and 132.76 ± 9.32 GPa, respectively. While a coating roughness adequate for the application could be measured, further optimization of the coating adhesion is needed to adequately evaluate its wear properties. It was concluded that the PECVD SiNx coating deposited at an NH₃ flow rate of 30 sccm showed the highest potential for the intended application. © The Author(s) 2023.

关键词： Coatings Hardness Plasma-enhanced chemical vapor deposition (PECVD) Silicon nitride

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Tunning the bandgap of MnO_(2)homojunction by building active high-index facet to achieve rapid electron transfer for enhanced photocatalytic sterilization

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Journal of materials science & Technology 2024年第1期168卷 265-275页

作者： Tao Zhang Bo Li Chaofeng Wang Shuilin Wu Shengli Zhu Hui Jiang Yufeng Zheng Zhaoyang Li Zhenduo Cui Yu Zhang Paul K Chu Xiangmei Liu Biomedical Materials Engineering Research Center Hubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science and Engineering Hubei UniversityWuhan 430062China School of Health Science&Biomedical Engineering Hebei University of TechnologyTianjin 300401China School of Materials Science&Engineering Peking UniversityBeijing 100871China School of Materials Science&Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072China Department of Orthopedics Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China Department of Physics Department of Materials Science and Engineering and Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Photocatalysis has been a research hotspot in recent years,and the design and modification of photocat-alysts have been the key *** methods for designing photocatalysts,including constructing heterojunctions and homojunctions,have been developed on the basis of *** this study,two homojunctions of manganese dioxide(MnO_(2)),including a high-index crystal plane homojunction and a general homojunction,are prepared using a stepwise hydrothermal *** a capping agent,the high-index crystal surface of the MnO_(2)is *** is found that the electron transport efficiency be-tween the two components of the homojunction with high-index planes is higher and the adsorption capacity of the oxygen is stronger,which leads to higher photocatalytic *** addition,the newly designed high-index homojunction is used for the treatment of bacterial infections,and it kills Staphy-lococcus aureus(***)and Escherichia coli(***)at rates of 99.95%±0.04%and 99.31%±0.25%,*** also has excellent therapeutic effects on mouse wounds,which implies superb practical application *** work provides a new strategy for the improved design of homojunctions and the application of photocatalytic materials.

关键词： Photocatalysis Homojunction Bandgap High-index facet Antibacterial

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Influence of Biomimetic Apatite Coating on the Biobehavior of TiO_(2)Scaffolds

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Journal of Bionic engineering 2024年第4期21卷 1975-1986页

作者： Shima Mahtabian Seyed Mehdi Mirhadi Nahid Hassanzadeh Nemati Melika Sharifi Fariborz Tavangarian Department of Biomedical Engineering University of DelawareNewarkDE19716USA Department of Ceramic Engineering Islamic Azad University(Shahreza Branch)ShahrezaIsfahan86145-311Iran Department of Biomedical Engineering Islamic Azad University(Science and Research Branch)TehranIran Mechanical Engineering Program School of ScienceEngineering and TechnologyPennsylvania State UniversityHarrisburgMiddletownPA17057USA Department of Materials Science&Engineering Islamic Azad University(Najaf Abad Branch)Najaf AbadIsfahan***Iran Biomedical Engineering Department Pennsylvania State UniversityState CollegeUniversity ParkPennsylvania16802USA

Immersion of scaffolds in Simulated Body Fluid(10SBF)is a standardized method for evaluating their bioactivity,simulating in vivo conditions where apatite deposits can be formed on the surface of scaffold,facilitating bone integration and ensuring their suitability for bone implant purposes,ultimately contributing to long-term implant *** effect of apatite deposition on bioactivity and cell behavior of TiO_(2)scaffolds was *** were soaked in 10SBF for different durations to form HAP layer on their *** results proved the development of a hydroxyapatite film resembling the mineral composition of bone Extracellular Matrix(ECM)on the TiO_(2)*** XRD test findings showed the presence of hydroxyapatite layer similar to bone at the depth of 10 nm.A decrease in the specific surface area(18.913 m^(2)g^(−1)),the total pore volume(0.045172 cm^(3)g^(−1)(at p/p0=0.990)),and the mean pore diameter(9.5537 nm),were observed by BET analysis which confirmed the formation of the apatite *** was found that titania scaffolds with HAP coating promoted human osteosarcoma bone cell(MG63)cell attachment and *** seems that immersing the scaffolds in 10SBF to form HAP coating before utilizing them for bone tissue engineering applications might be a good strategy to promote bioactivity,cell attachment,and implant fixation.

关键词： Titania Hierarchical meso/macro porous 10SBF Biomimetic apatite Coating

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Predicting single-phase solid solutions in as-sputtered high entropy alloys:High-throughput screening with machine-learning model

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Journal of materials science & Technology 2023年第7期138卷 70-79页

作者： Ji-Chang Ren Junjun Zhou Christopher J.Butch Zhigang Ding Shuang Li Yonghao Zhao Wei Liu Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Department of Biomedical Engineering Nanjing UniversityNanjing 210023China

Searching for single-phase solid solutions(SPSSs)in high-entropy alloys(HEAs)is a prerequisite for the intentional design and manipulation of microstructures of alloys in vast composition ***,to date,reported SPSS HEAs are still rare due to the lack of reliable guiding principles for the synthesis of new SPSS ***,we demonstrate an ensemble machine-learning method capable of discovering SPSS HEAs by directly predicting quinary phase diagrams based only on atomic composition.A total of 2198 experimental structure data are extracted from as-sputtered quinary HEAs in the literature and used to train a random forest classifier(termed AS-RF)utilizing bagging,achieving a prediction accuracy of 94.6%compared with experimental *** AS-RF model is then utilized to predict 224 quinary phase diagrams including∼32,000 SPSS HEAs in Cr-Co-Fe-Ni-Mn-Cu-Al composition *** extrapolation capability of the AS-RF model is then validated by performing first-principle calculations using density functional theory as a benchmark for the predicted phase transition of newly predicted ***,interpretation of the AS-RF model weighting of the input parameters also sheds light on the driving forces behind HEA formation in sputtered systems with the main contributors being:valance electron concentration,work function,atomic radius difference and elementary symmetries.

关键词： High entropy alloys Phase structures Machine learning Density functional theory

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Harnessing the flatbandλ-Ti_(3)O_(5):A breakthrough in solar steam generation

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science China materials 2023年第11期66卷 4515-4516页

作者： Chuxin Lei Guihua Yu Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA

As global population rises,accompanied by escalating environmental pollution and climate change,numerous countries find themselves grappling with an acute scarcity of natural freshwater resources^([1]).Seawater desalination presents a compelling solution to this looming crisis,especially considering the oceans are Earth’s largest water reservoir^([2]).

关键词： reservoir Earth breakthrough

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Molecular regulation of metal-organic frameworks for rapid and efficient extraction of uranium from seawater

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science China Chemistry 2025年第5期68卷 1906-1915页

作者： Jie Luo Xiao Luo Mo Xie Jia-Tong Lin Jie Pang Na Yin Yan-Yan Li Guo-Hong Ning Dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University Department of Biomedical Engineering College of Life Science and TechnologyJinan University

The development of novel metal-organic frameworks（MOFs） as solid adsorbents for rapid and efficient extraction of uranium from natural seawater is a long-term pursuit, yet remains challenging. In this work, we have prepared four two-dimensional（2D）vinylene-linked cyclic trinuclear units（CTUs） based MOFs. The metal nodes in the skeleton can be regulated, resulting in two Ag-CTU and two Cu-CTU-based MOFs with similar 2D hexagonal structures. These MOFs exhibit not only good stability in acid/base, γ-ray irradiation and natural seawater but also feature excellent anti-biofouling properties against five marine bacteria with inhibition rates as high as ～99%. Interestingly, the alteration of Ag（I） to Cu（I） remarkably enhances the uranium sorption capacity due to the reduction of soluble U（VI） to insoluble U（IV） triggered by the chemical and photo-redox reaction of *** to the multiple functions, the Cu-CTU-based MOF delivers the best overall performance for uranium extraction from natural seawater with a high adsorption capacity of 7.96 mg g-1and adsorption rate of ～1.00 mg g-1day-1, which is much higher than most of reported representative solid adsorbents. Our work paves a new way for rationally designing synergistic MOFs with superior performance for extracting uranium from natural seawater.

关键词： metal-organic frameworks uranium extraction photocatalytic reduction seawater

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Regulation of TiO_(2) nanoarrays on titanium implants for enhanced osteogenic activity and immunomodulation

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Journal of materials science & Technology 2023年第19期150卷 233-244页

作者： Ruoyu Li Hongyu Zhang Xiaohong Yao Bin Tang Paul K Chu Xiangyu Zhang Shanxi Key Laboratory of Biomedical Metal Materials College of Materials Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Department of Occupational Disease Second Hospital of Shanxi Medical UniversityTaiyuan 030001China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina College of Biomedical Engineering Taiyuan University of TechnologyTaiyuan 030024China

The surface topography of implants plays a major role in osteogenesis and *** this study,three types of TiO_(2) nanoarrays including nanorod arrays with a diameter of 45 nm(TiO_(2)-N),nanorod arrays with a diameter of 60 nm(TiO_(2)-N N),and nanocone arrays(TiO_(2)-NW)are prepared on titanium and the behavior of bone marrow stromal cells(BMSCs)and polarization of macrophages are *** to the planar titanium control,TiO_(2) nanoarrays facilitate osteogenesis of BMSCs and stimulate the pro-healing M2 ***,adhesion,spreading,proliferation,and osteogenic differentiation of BMSCs are more pronounced on TiO_(2)-N N than both TiO_(2)-N and TiO_(2)-***_(2)-NN also produces the best immune microenvironment,while TiO_(2)-NW is more favorable than TiO_(2)-NN from the viewpoint of cell adhesion and spreading of osteoblasts.

关键词： TiO_(2)nanoarrays Osteogenic activity Immunomodulation Hydrothermal treatment

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Emerging single-photon detection technique for high-performance photodetector

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Frontiers of physics 2024年第6期19卷 199-224页

作者： Jinxiu Liu Zhenghan Peng Chao Tan Lei Yang Ruodan Xu Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China Department of Materials Science and Engineering Stanford UniversityCalifornia 94305USA Department of Biomedical Engineering and Technology Institute of Basic Theory for Chinese MedicineChina Academy of Chinese Medical SciencesBeijing 100700China

Single-photon detections(SPDs)represent a highly sensitive light detection technique capable of detecting individual photons at extremely low light intensity *** technology mainly relies on the mainstream SPDs,such as photomultiplier tubes(PMTs),avalanche photodiodes(SAPD),superconducting nanowire single-photon detectors(SNSPDs),supercon-ducting transition-edge sensor(TES),and hybrid lead halide ***,the complexity and high manufacturing cost,coupled with the requirement of special conditions like a low-temperature environment,pose significant challenges to the wide adoption of *** address the challenges faced by SPDs,significant efforts have been devoted to enhan-cing their *** this review,we first summarize the principles and technical challenges of several ***,superconductors,semiconductors,3D bulk materials,2D film materials,1D nanowires,and OD quantum dots have all been discussed for single-photon *** such as special optical structure,waveguide integration,and strain engineering have been employed to elevate the performance of single-photon *** techniques enhance light absorption and modulate the band structure of the material,thereby improving the single-photon *** providing an overview of the current situation and future challenges of SPDs,this review aims to propose potential solutions for photon detection technology.

关键词： single-photon detection superconductor semiconductor low dimensional materials optical structure waveguide integration strain engineering

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