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- 저자 : Jumee Wang (검색결과 5 건)
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Shuoshuo Wang,Wubin Chen,Lina Wang,Juming Yao,Guocheng Zhu,Baochun Guo,Jiri Militky,Mohanapriya Venkataraman,MING ZHANG 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.108 No.-
Ultraviolet radiation is extremely harmful to humans and often occurs in high-temperature weather. Thedevelopment of intelligent textiles based on UV protection and thermal regulation is paramount. In thisresearch, we use coaxial electrospinning technology to prepare anti-ultraviolet smart thermo-regulatingnanofiber membranes. The zinc oxide (ZnO) and octadecane were incorporated into nanofibers with thepolyacrylonitrile (PAN)/ZnO as sheath and the octadecane as core successfully. The composite nanofibershave excellent comprehensive properties, the highest melting enthalpy is 111.38 J/g, and the UPF value is86.21. This multifunctional nanofiber membrane has broad prospects in outdoor products, electroniccomponent protection, and military products.
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Zhuofan Qin,Shuoshuo Wang,Lina Wang,Juming Yao,Guocheng Zhu,Baochun Guo,Jiri Militky,Mohanapriya Venkataraman,MING ZHANG 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
Bacteria, viruses, and temperatures change can affect the preservation of food and medicines, so it is necessaryto develop an intelligent textile for antibacterial and thermal regulation. In this paper, we usedcoaxial electrospinning technology to achieve antibacterial thermo-regulating intelligent textiles. Thepolyacrylonitrile (PAN)/curcumin is the sheath, and n-octadecane is the core. The composite fiber hasexcellent comprehensive properties. When the curcumin concentration is 10 wt%, the antibacterial effectis the best, and the bacteriostatic rate is 100%. When the core feed rate is 0.25 mL/h, the latent heat canreach 123.94 J/g. The multifunctional textiles have potential application value in the clothing fabrics,preservation and storage quality of functional foods, biomedical products, and other fields.
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Runnan Xu,MING ZHANG,Juming Yao,YAN WANG,Yafeng Ge,Dana Kremenakova,Jiri Militky,Guocheng Zhu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-
The efficient absorption of wound exudate and the prevention of soft tissue infection are major concernsin wound repair. Good antibacterial agents and unique wound dressing structures can effectively reducewound infection, thereby accelerating wound healing. In some double-layer asymmetric wound dressings,antimicrobial agents are incorporated in the hydrophilic layer, and only a small fraction of theantimicrobial agent penetrates the hydrophobic fibre layer towards the interior of the wound. Therefore, in this study, we chose curcumin (Cur.)/cellulose acetate (CA) as the hydrophobic inner layer. Not only does this effectively allow Cur. to make contact with the lining of the wound but it also preventsthe wound from sticking. However, the mechanical properties of a single CA/Cur. layer are not ideal. Using polyacrylonitrile as the outer hydrophilic substrate improves the fibre mat mechanical properties. In addition, to further improve the hydrophilicity, the water contact angle was reduced by introducing ahydrophilic group (2-hydroxypropyl-b-cyclodextrin, b-CD) and changing the fibre roughness (nano-TiO2). Thus, wound dressings with high biocompatibility, excellent antibacterial properties, and unidirectionalwater conduction were constructed for preventing secondary wound damage. In terms of performance, ittook 40 minutes for water to enter the hydrophilic fibre layer from the hydrophobic fibre layer (the watercontact angle decreased from 121.24 to 85.42), and it took 25 minutes for water to completely enter thefibre mats (the water contact angle decreased from 85.42-0), which is effective for draining wound exudate. In terms of antibacterial properties, the antibacterial rates of Cur. (8 wt%) against Escherichia coliand Staphylococcus aureus were 82.4% and 92.57%, respectively. The Cur./CA@PAN/b-CD/TiO2 bilayerasymmetric nanofibrous mats mimic the semipermeability of the extracellular matrix (ECM) and havehigh biocompatibility, which is effective for preventing secondary wound damage. It can be used as alow-cost, high-performance wound dressing with medical material potential.
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Jinyoung Jang,Hyun-Sung Jung,Jumee Wang,Sukil Kim 대한신경정신의학회 2021 PSYCHIATRY INVESTIGATION Vol.18 No.1
Objective The aim of this study was to investigate the prevalence of depression and suicidal ideation among older Korean adults and the predictors of suicidal ideation. Methods We analyzed data from 5,604 Koreans aged 65 or older collected by the Korea National Health and Nutrition Examination Survey in 2012-2016, an annual national, cross-sectional, epidemiologic study of the Korean population. A chi-square test was used to assess differences in socio-demographic characteristics by suicidal ideation. Psychological variables, self-rated physical health, and the five dimensions of the Korean version of the EQ-5D (EuroQoL) were compared between four subgroups categorized according to the presence/absence of suicidal ideation and depression. Multiple logistic regression was used to estimate the predictive power of health-related quality of life variables, as well as physical and psychological factors regarding suicidal ideation. Results Overall, 11.5% of the sample reported suicidal ideation, and 20.0% of the suicidal ideation group were diagnosed with depression. Respondents with suicidal ideation had significantly lower levels of health-related quality of life than those without suicidal ideation. EQ-5D self-control (OR=1.42), anxiety/depression (OR=2.32), depression (OR=2.07), and self-rated physical health (OR=1.36) were found to significantly predict suicidal ideation. Conclusion Suicidal ideation without depression was prevalent among older Koreans. Self-control, anxiety/depression of EQ-5D, selfrated physical health, and depression predicted suicidal ideation. Interventions to screen older Koreans for early detection of suicide risk and prevention strategies should consider evaluating each EQ-5D dimension.
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Highly Porous Cellulose Microbeads and their Adsorption for Methylene Blue
Jiarui Hua,Ranju Meng,Tiejun Wang,Huiying Gao,Zhenze Luo,Yuanyuan Jin,Lin Liu,Juming Yao 한국섬유공학회 2019 Fibers and polymers Vol.20 No.4
Highly porous cellulose microbeads with porosity of more than 90 % were successfully prepared via a faciledissolution and subsequent regeneration of cellulose in H2SO4/Na2SO4 coagulation bath. Effects of coagulation temperature,H2SO4, and Na2SO4 concentration on the microstructure, average diameter, porosity, specific surface area, and mechanicalproperty of formed cellulose beads were investigated systematically. In view of the high porosity and specific area, thecellulose beads were used as adsorbents for dye removal. The results revealed that the porous cellulose beads exhibited highadsorption performance with maximum adsorption capacity of 48.80 mg/g for cationic dye methylene blue. Besides, theporous cellulose beads also presented a potential in practical application and its adsorption capacity for methylene blue stillretained 29.43 mg/g after six adsorption-desorption cycles.
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