Anfisa Ayalon, A. Rubowitz, P. Roy, S. Shoval, I. Legchenkova, E. Bormashenko
The paper is devoted to the interfacial aspects of the intraocular behavior, migration and distribution of commonly injected ophthalmic drugs in eyes filled with medical-grade 1300 cSt silicone oil used as a retinal tamponade agent. Novel in vitro and ex vivo models were created for studying the physical properties of the retinal surface and interfacial spreading of the ophthalmic drugs over retinas. In vitro model experiments showed that droplets of all tested drugs sank rapidly in the silicone oil to contact with the plasma-treated glass, and then rapidly spread over the glass surface. In the ex vivo model, the migration phase was followed by contact with, and rapid spread/absorption by the retinal interface. The wetting behavior of drugs under contact with the glass substrate and retinas was similar. Characteristic time scales of drugs spreading, controlled by the viscous dissipation, were close. All tested drugs migrated to the retinal surface and rapidly spread across the retinal surface. This suggests that intravitreal drugs might be used effectively in eyes filled with a silicone oil tamponade, as they rapidly migrate to, and spread over the retinal surface.
{"title":"Interfacial behavior of intravitreally injected drugs simulated by models of the silicone oil filled eye","authors":"Anfisa Ayalon, A. Rubowitz, P. Roy, S. Shoval, I. Legchenkova, E. Bormashenko","doi":"10.1680/jsuin.22.01011","DOIUrl":"https://doi.org/10.1680/jsuin.22.01011","url":null,"abstract":"The paper is devoted to the interfacial aspects of the intraocular behavior, migration and distribution of commonly injected ophthalmic drugs in eyes filled with medical-grade 1300 cSt silicone oil used as a retinal tamponade agent. Novel in vitro and ex vivo models were created for studying the physical properties of the retinal surface and interfacial spreading of the ophthalmic drugs over retinas. In vitro model experiments showed that droplets of all tested drugs sank rapidly in the silicone oil to contact with the plasma-treated glass, and then rapidly spread over the glass surface. In the ex vivo model, the migration phase was followed by contact with, and rapid spread/absorption by the retinal interface. The wetting behavior of drugs under contact with the glass substrate and retinas was similar. Characteristic time scales of drugs spreading, controlled by the viscous dissipation, were close. All tested drugs migrated to the retinal surface and rapidly spread across the retinal surface. This suggests that intravitreal drugs might be used effectively in eyes filled with a silicone oil tamponade, as they rapidly migrate to, and spread over the retinal surface.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43467135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Q. Zhou, Zhi-hai Jia, Xuejiao Xiong, Jiao Wang, Xinran Dai
Straight and curved hydrophilic microfinned surfaces are prepared in this work by photolithography and sputtering coating techniques using silicon wafers as substrates. The behavior characteristics of drops on these surfaces are discussed by using image processing technology. Experimental results show that when a drop is placed on the straight microfinned surface, the front contact line of the drop can move, while the rear contact line remains fixed. On the curved microfinned surface, however, both the front and the rear contact line can move. The drop can be self-propelled directionally from the region with larger roughness to the region with smaller roughness. The characteristics of velocity and acceleration on both surfaces are analyzed. A theoretical model is proposed by analyzing the energy conversion and compared with the experimental results. This study provides a novel microstructured surface for enhancing the heat transfer performance of condensers.
{"title":"Self-propelled drops on hydrophilic microfinned surfaces","authors":"Q. Zhou, Zhi-hai Jia, Xuejiao Xiong, Jiao Wang, Xinran Dai","doi":"10.1680/jsuin.22.01012","DOIUrl":"https://doi.org/10.1680/jsuin.22.01012","url":null,"abstract":"Straight and curved hydrophilic microfinned surfaces are prepared in this work by photolithography and sputtering coating techniques using silicon wafers as substrates. The behavior characteristics of drops on these surfaces are discussed by using image processing technology. Experimental results show that when a drop is placed on the straight microfinned surface, the front contact line of the drop can move, while the rear contact line remains fixed. On the curved microfinned surface, however, both the front and the rear contact line can move. The drop can be self-propelled directionally from the region with larger roughness to the region with smaller roughness. The characteristics of velocity and acceleration on both surfaces are analyzed. A theoretical model is proposed by analyzing the energy conversion and compared with the experimental results. This study provides a novel microstructured surface for enhancing the heat transfer performance of condensers.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45007606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dong Zhang, Hui-Di Wang, Mengchen Huang, T. Fan, Fuquan Deng, C. Xue, Xiaohua Guo
Radiative cooling materials can cool terrestrial objects without any energy input, but are susceptible to rain wetting and dust contamination which affects badly the cooling characteristics. Herein, this work fabricated a radiative cooling porous film with superhydrophobic self-cleaning using poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and poly (vinylidene fluoride) (PVDF). The PVDF-HFP/PVDF film consists of micropores with nanoparticles both inside and at the surface. The micro/nanostructures enhanced the scattering of solar light, which in combination with the infrared emissivity of both PVDF-HFP and PVDF polymers makes the film show excellent radiative cooling ability with a sub-ambient temperature drop of 16°C. The micro/nanostructures roughened the surface of the film, which in combination with the low surface energy property of both PVDF-HFP and PVDF polymers endows the film with superhydrophobic self-cleaning property. The self-cleaning function defends the film from contamination and maintain sustainable radiative cooling for lasting applications. The integration of cooling and self-cleaning into a film paves a way to multifunctional and long-life radiative cooling materials.
{"title":"Fabrication of sustainable radiative cooling film with superhydrophobic self-cleaning property","authors":"Dong Zhang, Hui-Di Wang, Mengchen Huang, T. Fan, Fuquan Deng, C. Xue, Xiaohua Guo","doi":"10.1680/jsuin.22.00015","DOIUrl":"https://doi.org/10.1680/jsuin.22.00015","url":null,"abstract":"Radiative cooling materials can cool terrestrial objects without any energy input, but are susceptible to rain wetting and dust contamination which affects badly the cooling characteristics. Herein, this work fabricated a radiative cooling porous film with superhydrophobic self-cleaning using poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and poly (vinylidene fluoride) (PVDF). The PVDF-HFP/PVDF film consists of micropores with nanoparticles both inside and at the surface. The micro/nanostructures enhanced the scattering of solar light, which in combination with the infrared emissivity of both PVDF-HFP and PVDF polymers makes the film show excellent radiative cooling ability with a sub-ambient temperature drop of 16°C. The micro/nanostructures roughened the surface of the film, which in combination with the low surface energy property of both PVDF-HFP and PVDF polymers endows the film with superhydrophobic self-cleaning property. The self-cleaning function defends the film from contamination and maintain sustainable radiative cooling for lasting applications. The integration of cooling and self-cleaning into a film paves a way to multifunctional and long-life radiative cooling materials.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47529345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yongfu Zhang, Yan Xiang, Yunjie Yang, Xiaolin Wei, B. Ma, Weiwei Chen, Huanwu Cheng, Lu Wang, Lin Lu, Maoyuan Li, Haifeng Fu
Quartz fiber fabric has been widely used in national defense, military, aerospace industries due to its good high temperature resistance, chemical stability, and excellent thermal shock resistance. However, tendency of thermal degradation due to crystallization at high temperature may destroy the high temperature performance of the quartz fiber fabric, especially its high temperature mechanical property. In this study, Al2O3 ceramic coating was synthesized on the surface of 2D quartz fiber fabric in aqueous solution near room temperature. Surface morphology and chemical composition were studied to evaluate the quality of the coating by SEM, AFM, XPS and FT-IR. The annealing behavior at high temperature was evaluated by electronic universal testing machine after high temperature processing. Al2O3 coating could improve its annealing behavior effectively. The maximum load that the coated fabric can bear was 2.5 times as higher as that of the original fabric, proving the superior high temperature mechanical property of the coated fabric. The coating on the surface of the fiber could block the damage of the high temperature to the quartz fiber, improving the crystallization phenomenon of the quartz fiber at high temperature, followed by the improve in the high temperature mechanical property of the fabric.
{"title":"Preparation, characterization and annealing behavior of Al2O3 coating on quartz fiber fabric in aqueous solution near room temperature","authors":"Yongfu Zhang, Yan Xiang, Yunjie Yang, Xiaolin Wei, B. Ma, Weiwei Chen, Huanwu Cheng, Lu Wang, Lin Lu, Maoyuan Li, Haifeng Fu","doi":"10.1680/jsuin.22.00035","DOIUrl":"https://doi.org/10.1680/jsuin.22.00035","url":null,"abstract":"Quartz fiber fabric has been widely used in national defense, military, aerospace industries due to its good high temperature resistance, chemical stability, and excellent thermal shock resistance. However, tendency of thermal degradation due to crystallization at high temperature may destroy the high temperature performance of the quartz fiber fabric, especially its high temperature mechanical property. In this study, Al2O3 ceramic coating was synthesized on the surface of 2D quartz fiber fabric in aqueous solution near room temperature. Surface morphology and chemical composition were studied to evaluate the quality of the coating by SEM, AFM, XPS and FT-IR. The annealing behavior at high temperature was evaluated by electronic universal testing machine after high temperature processing. Al2O3 coating could improve its annealing behavior effectively. The maximum load that the coated fabric can bear was 2.5 times as higher as that of the original fabric, proving the superior high temperature mechanical property of the coated fabric. The coating on the surface of the fiber could block the damage of the high temperature to the quartz fiber, improving the crystallization phenomenon of the quartz fiber at high temperature, followed by the improve in the high temperature mechanical property of the fabric.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43173377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The influence of the parameters of copper substrate on the wettability at different temperatures was studied experimentally and theoretically. It is known that water condensation on graphene leads to a change in the electrical properties and affects the graphene sensor sensitivity. To date, there is no data on the effect of temperature on surface properties of graphene synthesized on copper. It is shown for the first time that a change in the crystal orientation of copper (111), (110) and (100) leads to different structuring of water on copper and on graphene layer. An increase in temperature alters the density of water distribution and the pattern of water structuring. The analysis of the influence of grain boundaries on graphene synthesis is given. A change in the size of defects is shown to alter the qualitative nature of roughness for copper and graphene. Various methods of roughness processing allow us to explain the inconsistency of existing works comparing the roughness of the metal and graphene coating. The roughness measurement serves to prove our previously proposed hypothesis about the local stratification of graphene and copper due to large surface defects. The results obtained are important for the development of graphene-based sensor technologies.
{"title":"The influence of copper substrate temperature on the wettability of graphene coating","authors":"S. Misyura, V. Andryushchenko, V. Morozov","doi":"10.1680/jsuin.22.00021","DOIUrl":"https://doi.org/10.1680/jsuin.22.00021","url":null,"abstract":"The influence of the parameters of copper substrate on the wettability at different temperatures was studied experimentally and theoretically. It is known that water condensation on graphene leads to a change in the electrical properties and affects the graphene sensor sensitivity. To date, there is no data on the effect of temperature on surface properties of graphene synthesized on copper. It is shown for the first time that a change in the crystal orientation of copper (111), (110) and (100) leads to different structuring of water on copper and on graphene layer. An increase in temperature alters the density of water distribution and the pattern of water structuring. The analysis of the influence of grain boundaries on graphene synthesis is given. A change in the size of defects is shown to alter the qualitative nature of roughness for copper and graphene. Various methods of roughness processing allow us to explain the inconsistency of existing works comparing the roughness of the metal and graphene coating. The roughness measurement serves to prove our previously proposed hypothesis about the local stratification of graphene and copper due to large surface defects. The results obtained are important for the development of graphene-based sensor technologies.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46689579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
X. W. Chen, LP Cai, D. F. Zhang, M. Li, Y. Ran, W. Ping
To improve the surface micropores and high-temperature oxidation resistance of micro-arc oxidation (MAO) coating on TC4 titanium alloy, cerium dioxide (CeO2) particles were introduced into the electrolyte to prepare MAO composite coatings with different CeO2 content. X-ray diffractometer, scanning electron microscope and multifunctional material surface performance tester were used to analyze the phase composition, surface morphology and bonding force of the samples. TC4 substrate, undoped MAO sample and optimally doped MAO sample were oxidized at 650°C, 750°C and 850°C respectively. The results show that the best doped MAO samples show excellent high-temperature oxidation resistance at three temperatures. Compared with the undoped MAO sample, the maximum oxidation weight gain per unit area of the optimally doped MAO sample decreased by 10.8%, 19.6% and 22.1%, respectively. This is mainly because the thickness, hardness and adhesion of MAO coating are all increased by doping CeO2 particles, and a dense protective layer can also be formed on the surface of TC4 substrate. The invasion of oxygen medium is effectively prevented. In this research work, the optimal addition amount of CeO2 is 6 g/L.
{"title":"High-temperature oxidation behavior of CeO2 doped MAO coatings on TC4 titanium alloy","authors":"X. W. Chen, LP Cai, D. F. Zhang, M. Li, Y. Ran, W. Ping","doi":"10.1680/jsuin.22.00033","DOIUrl":"https://doi.org/10.1680/jsuin.22.00033","url":null,"abstract":"To improve the surface micropores and high-temperature oxidation resistance of micro-arc oxidation (MAO) coating on TC4 titanium alloy, cerium dioxide (CeO2) particles were introduced into the electrolyte to prepare MAO composite coatings with different CeO2 content. X-ray diffractometer, scanning electron microscope and multifunctional material surface performance tester were used to analyze the phase composition, surface morphology and bonding force of the samples. TC4 substrate, undoped MAO sample and optimally doped MAO sample were oxidized at 650°C, 750°C and 850°C respectively. The results show that the best doped MAO samples show excellent high-temperature oxidation resistance at three temperatures. Compared with the undoped MAO sample, the maximum oxidation weight gain per unit area of the optimally doped MAO sample decreased by 10.8%, 19.6% and 22.1%, respectively. This is mainly because the thickness, hardness and adhesion of MAO coating are all increased by doping CeO2 particles, and a dense protective layer can also be formed on the surface of TC4 substrate. The invasion of oxygen medium is effectively prevented. In this research work, the optimal addition amount of CeO2 is 6 g/L.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49286422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ying Xie, Chuanchuan Guo, Tao Li, Shenzhi Wang, Ri Liu, Litong Dong, Lu Wang, Zhengxun Song, Z. Weng, Zuobin Wang
Reducing energy consumption is one of the most effective ways to solve the problem of energy shortage. In this work, the nature-inspired paint microgroove arrays with different periods were fabricated using a one-step laser ablation method. The wind tunnel experiment was performed at two wind speeds 27.7 m/s and 33. m/s to collect the drag force data on smooth and structured paint coatings. The results shown that the microgroove arrays oriented perpendicular to the flow direction were beneficial to drag reduction, and the drag reduction rate of up to 7.2% was obtained. Meanwhile, the microgroove arrays induced by laser ablation changes the wettability of paint surface to hydrophobicity. The contact angle (CA) shows a slightly decrease trend with the increase of the periodic scale. Besides, the anticorrosion properties of these microgrooves make them advantageous in harsh environments. The fabricated drag-reducing paint microstructures, with the features of self-cleaning and durability, have the potential to be applied on vehicles to realize speed improvement and energy saving.
{"title":"Bio-inspired microgroove arrays with drag reduction and hydrophobic properties","authors":"Ying Xie, Chuanchuan Guo, Tao Li, Shenzhi Wang, Ri Liu, Litong Dong, Lu Wang, Zhengxun Song, Z. Weng, Zuobin Wang","doi":"10.1680/jsuin.22.00031","DOIUrl":"https://doi.org/10.1680/jsuin.22.00031","url":null,"abstract":"Reducing energy consumption is one of the most effective ways to solve the problem of energy shortage. In this work, the nature-inspired paint microgroove arrays with different periods were fabricated using a one-step laser ablation method. The wind tunnel experiment was performed at two wind speeds 27.7 m/s and 33. m/s to collect the drag force data on smooth and structured paint coatings. The results shown that the microgroove arrays oriented perpendicular to the flow direction were beneficial to drag reduction, and the drag reduction rate of up to 7.2% was obtained. Meanwhile, the microgroove arrays induced by laser ablation changes the wettability of paint surface to hydrophobicity. The contact angle (CA) shows a slightly decrease trend with the increase of the periodic scale. Besides, the anticorrosion properties of these microgrooves make them advantageous in harsh environments. The fabricated drag-reducing paint microstructures, with the features of self-cleaning and durability, have the potential to be applied on vehicles to realize speed improvement and energy saving.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46002426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Photoelectrochemical water splitting converts solar energy into clean hydrogen fuel. In this system, the preparation of high-quality photoanode is essential for achieving efficient solar hydrolysis. Polymeric carbon nitride has emerged as a promising photocatalyst for solar water splitting due to its visible light absorption, suitable band edge positions and good chemical stability. However, considerable difficulties have been encountered for the preparation of robust and well-bonded carbon nitride films on conductive substrates. Herein, a combined strategy of electrophoresis and vapor deposition results in robust and high performing carbon nitride film photoelectrodes with good bonding on substrates, suitable thickness for light absorption, and enhanced charge separation and transfer abilities. The unique structure of the photoanode thus facilitates the oxidation of water and leads to an optimal photocurrent density of approximately 120 μA cm-2 at 1.23 VRHE. This work provides new insights for the preparation of polymeric carbon nitride film photoelectrodes, promoting the developments of photoelectric and photoelectrochemical applications based on carbon nitride.
{"title":"Carbon nitride photoelectrode prepared via a combined strategy of electrophoresis and vapor deposition","authors":"Zhiqiang Xie, Yuqing Wang, Wei Peng, Zhehan Yi, Tao Zhang, Wenping Si, Feng Hou","doi":"10.1680/jsuin.22.00048","DOIUrl":"https://doi.org/10.1680/jsuin.22.00048","url":null,"abstract":"Photoelectrochemical water splitting converts solar energy into clean hydrogen fuel. In this system, the preparation of high-quality photoanode is essential for achieving efficient solar hydrolysis. Polymeric carbon nitride has emerged as a promising photocatalyst for solar water splitting due to its visible light absorption, suitable band edge positions and good chemical stability. However, considerable difficulties have been encountered for the preparation of robust and well-bonded carbon nitride films on conductive substrates. Herein, a combined strategy of electrophoresis and vapor deposition results in robust and high performing carbon nitride film photoelectrodes with good bonding on substrates, suitable thickness for light absorption, and enhanced charge separation and transfer abilities. The unique structure of the photoanode thus facilitates the oxidation of water and leads to an optimal photocurrent density of approximately 120 μA cm-2 at 1.23 VRHE. This work provides new insights for the preparation of polymeric carbon nitride film photoelectrodes, promoting the developments of photoelectric and photoelectrochemical applications based on carbon nitride.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47045354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The antimicrobial and hemostatic activities of wound dressing drew more and more attention in the healthcare or medical industry. Here, the quaternary ammonium groups were introduced in the chitosan backbone via co-polymerization, and the quaternized chitosan was coated on the cotton fabric through the PDC process. Compared with BPTCD treated cotton (cotton/BPTCD), the breaking strength of CS-b-pSBMA coated cotton (cotton/SBMA) have not affected by the addition of CS-b-pSBMA. The SBMA coated cotton displayed good liquid adsorptive activity with or without pressure. As a dressing material, cotton/SBMA exhibited good hemostatic activity and hemocompatibility. After being challenged with E. coli O157:H7 and S. aureus for 60 min, cotton/SBMA showed good antimicrobial properties, and 100% bacteria was inhibited within the contact time. These attractive functions make the quaternized chitosan-coated cotton fabrics a good candidate for wound dressing materials.
{"title":"Synthesis of quaternized chitosan and its application in cotton as wound dressing material","authors":"Yingfeng Wang, Mengfan Zhang, Hao Hou, Maoli Yin, Zhipeng Ma, Kefan Chen, Qizhen Huang","doi":"10.1680/jsuin.22.00037","DOIUrl":"https://doi.org/10.1680/jsuin.22.00037","url":null,"abstract":"The antimicrobial and hemostatic activities of wound dressing drew more and more attention in the healthcare or medical industry. Here, the quaternary ammonium groups were introduced in the chitosan backbone via co-polymerization, and the quaternized chitosan was coated on the cotton fabric through the PDC process. Compared with BPTCD treated cotton (cotton/BPTCD), the breaking strength of CS-b-pSBMA coated cotton (cotton/SBMA) have not affected by the addition of CS-b-pSBMA. The SBMA coated cotton displayed good liquid adsorptive activity with or without pressure. As a dressing material, cotton/SBMA exhibited good hemostatic activity and hemocompatibility. After being challenged with E. coli O157:H7 and S. aureus for 60 min, cotton/SBMA showed good antimicrobial properties, and 100% bacteria was inhibited within the contact time. These attractive functions make the quaternized chitosan-coated cotton fabrics a good candidate for wound dressing materials.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43492651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Md Salauddin Sk, Rony Mia, Ejajul Hoque, B. Ahmed, Md. Jawad Ibn Amin, Shekh Md. Mamun Kabir, Sakil Mahmud
Herein, the influence of the antimicrobial treatments of organic cotton fabrics (OCFs) using silver-copper-zeolite microparticles (hereafter referred to as ‘zeolite’) was investigated. There were six different methods applied to six different types of OCFs. The antimicrobial performances demonstrate around 95.33% and 93.88% reduction of gram-positive and gram-negative bacteria after 30 times home laundry, respectively. The color stability yield by the surface plasmon resonance mates the commercial requirement in items of colorfastness ratings of 3-4 for wash, 4 for light, 4-5 for dry rubbing, and 3-4 for wet rubbing. These findings established that this treatment successfully endowed OCFs with long-lasting antimicrobial capabilities and thermal stability due to the interaction with the microparticles. The phenomenon was further confirmed by morphological, spectroscopical, and thermal characterization. This approach of OCFs functionalization avoiding hazardous chemicals could be a benchmark for antimicrobial performances in sustainable industrial applications.
{"title":"Antimicrobial performance of silver-copper-zeolite microparticles treated organic cotton fabric using versatile methods","authors":"Md Salauddin Sk, Rony Mia, Ejajul Hoque, B. Ahmed, Md. Jawad Ibn Amin, Shekh Md. Mamun Kabir, Sakil Mahmud","doi":"10.1680/jsuin.22.00023","DOIUrl":"https://doi.org/10.1680/jsuin.22.00023","url":null,"abstract":"Herein, the influence of the antimicrobial treatments of organic cotton fabrics (OCFs) using silver-copper-zeolite microparticles (hereafter referred to as ‘zeolite’) was investigated. There were six different methods applied to six different types of OCFs. The antimicrobial performances demonstrate around 95.33% and 93.88% reduction of gram-positive and gram-negative bacteria after 30 times home laundry, respectively. The color stability yield by the surface plasmon resonance mates the commercial requirement in items of colorfastness ratings of 3-4 for wash, 4 for light, 4-5 for dry rubbing, and 3-4 for wet rubbing. These findings established that this treatment successfully endowed OCFs with long-lasting antimicrobial capabilities and thermal stability due to the interaction with the microparticles. The phenomenon was further confirmed by morphological, spectroscopical, and thermal characterization. This approach of OCFs functionalization avoiding hazardous chemicals could be a benchmark for antimicrobial performances in sustainable industrial applications.","PeriodicalId":22032,"journal":{"name":"Surface Innovations","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41807507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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