Pub Date : 2023-09-14DOI: 10.1515/polyeng-2023-0150
Himadri Mullick
Abstract In this study, the development and characterization of a plant-derived biopolymer, gum acacia, chemically modified by an herbal dye, red beetroot (Latin Beta vulgaris ) has been presented. Red beetroot, a flowering plant with abundant phytochemicals, prevents diseases and produces colorful chromophores. Chromophores interact with incident intense electromagnetic field and thereby absorb radiation in ultraviolet and/or visible region of the spectrum, promoting low to high-level electron excitation between different energy states. Such transition influences variation in optical and electrical properties of the system. Optical properties of both biopolymer unmodified gum acacia specimen and after modification with red beet induced chromophore are investigated by UV–visible absorption spectroscopy. Pronounced light absorption is observed in the visible range of the spectrum compared to the unmodified specimen in which absorption is found to be observed in the deep ultraviolet range. Electrical characterization of the modified biopolymer with red beetroot extract suggests eviation from ideal dielectric relaxation obeying Debye mechanism. Electrical conductivity is found to be enhanced over pure specimen. These properties are eligible for application in energy storage devices, especially as a sensitizer in photovoltaic material which are ongoing extensive research area.
{"title":"Influence of betalain natural dye from red beet in gum acacia biopolymer: optical and electrical perspective","authors":"Himadri Mullick","doi":"10.1515/polyeng-2023-0150","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0150","url":null,"abstract":"Abstract In this study, the development and characterization of a plant-derived biopolymer, gum acacia, chemically modified by an herbal dye, red beetroot (Latin Beta vulgaris ) has been presented. Red beetroot, a flowering plant with abundant phytochemicals, prevents diseases and produces colorful chromophores. Chromophores interact with incident intense electromagnetic field and thereby absorb radiation in ultraviolet and/or visible region of the spectrum, promoting low to high-level electron excitation between different energy states. Such transition influences variation in optical and electrical properties of the system. Optical properties of both biopolymer unmodified gum acacia specimen and after modification with red beet induced chromophore are investigated by UV–visible absorption spectroscopy. Pronounced light absorption is observed in the visible range of the spectrum compared to the unmodified specimen in which absorption is found to be observed in the deep ultraviolet range. Electrical characterization of the modified biopolymer with red beetroot extract suggests eviation from ideal dielectric relaxation obeying Debye mechanism. Electrical conductivity is found to be enhanced over pure specimen. These properties are eligible for application in energy storage devices, especially as a sensitizer in photovoltaic material which are ongoing extensive research area.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135489725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Effective anti-infection prophylaxis for chronic wounds can reduce the risk of wound infection and improve healing rates. The use of good anti-infection wound dressings is particularly important. In this paper, an antimicrobial composite hydrocolloid sponge dressing with zinc oxide nanoparticles, hydroxypropyl chitosan, and polyvinyl alcohol as the main components was prepared using freeze-drying of the formulated suspensions. The characterizations by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy were performed; the antibacterial activity was determined; the on-demand dissolving properties were evaluated; and the basic properties such as porosity, vapor permeability, and water absorption were measured. The results showed that, when the mass ratio of HPCs/PVA was 6:4, the porosity, the steam permeability, the water absorption ratio, and dynamic complete dissolving time in 1 % acetic acid aqueous solution, respectively, reached the optimum value of 63.2 %, 57.7 %, 54.4, and 35 min. Antibacterial activity experiments showed that the sponges significantly inhibited Staphylococcus aureus , Escherichia coli , and Candida albicans . In conclusion, the above results indicate that the prepared hydrocolloid composite sponge has good air permeability, water absorption, antibacterial activity, and on-demand dissolving property and has potential applications in anti-infection treatment of hypo-exudative chronic wounds and pressure sore prevention.
{"title":"Antimicrobial hydrocolloid composite sponge with on-demand dissolving property, consisting mainly of zinc oxide nanoparticles, hydroxypropyl chitosan, and polyvinyl alcohol","authors":"Qun Wang, Xue Zhang, Xin Fang, Luyao Sun, Xianglong Wang, Hong Chen, Ningwen Zhu","doi":"10.1515/polyeng-2023-0024","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0024","url":null,"abstract":"Abstract Effective anti-infection prophylaxis for chronic wounds can reduce the risk of wound infection and improve healing rates. The use of good anti-infection wound dressings is particularly important. In this paper, an antimicrobial composite hydrocolloid sponge dressing with zinc oxide nanoparticles, hydroxypropyl chitosan, and polyvinyl alcohol as the main components was prepared using freeze-drying of the formulated suspensions. The characterizations by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy were performed; the antibacterial activity was determined; the on-demand dissolving properties were evaluated; and the basic properties such as porosity, vapor permeability, and water absorption were measured. The results showed that, when the mass ratio of HPCs/PVA was 6:4, the porosity, the steam permeability, the water absorption ratio, and dynamic complete dissolving time in 1 % acetic acid aqueous solution, respectively, reached the optimum value of 63.2 %, 57.7 %, 54.4, and 35 min. Antibacterial activity experiments showed that the sponges significantly inhibited Staphylococcus aureus , Escherichia coli , and Candida albicans . In conclusion, the above results indicate that the prepared hydrocolloid composite sponge has good air permeability, water absorption, antibacterial activity, and on-demand dissolving property and has potential applications in anti-infection treatment of hypo-exudative chronic wounds and pressure sore prevention.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135824713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-04DOI: 10.1515/polyeng-2023-0036
Hui Lu, Pingyin Wang, Yaozhu Tian, Zhu Luo
Abstract As the second largest synthetic rubber after styrene butadiene rubber, cis-butadiene rubber (BR) is one of the important raw materials for automobile tires and cold-resistant products. Herein, a traditional rubber preparation process was used to introduce dynamic reversible bonds into BR based on an “imitative” click reaction. Compared with traditional complex self-healing techniques, this method is undoubtedly simpler and more efficient. Dynamic reversible bonds are able to break and recombine under the stimulation of external conditions, which endow rubber with self-healing properties. We use the small biological molecule lipoic acid (LA) as a cross-linking agent and cross-link LA and BR through mechanical compounding and hot press vulcanization to obtain self-healing butadiene rubber (BLA). In addition, BLA-(Zn2+) was further prepared by introducing Zn2+ to form metal-oxygen coordination bonds with carboxyl groups. And systematically studied the effect of Zn2+ on the mechanical properties and self-healing properties of cross-linked BR. Through the combined action of disulfide bonds, hydrogen bonds and Zn2+-O coordination bonds, BLA-(Zn2+) has better properties than BLA, the tensile strength can reach 3.76 MPa, and the repair efficiency is about 82 %. This simple preparation process is certainly more cost effective.
{"title":"Preparation and properties of dynamic crosslinked styrene butadiene rubber","authors":"Hui Lu, Pingyin Wang, Yaozhu Tian, Zhu Luo","doi":"10.1515/polyeng-2023-0036","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0036","url":null,"abstract":"Abstract As the second largest synthetic rubber after styrene butadiene rubber, cis-butadiene rubber (BR) is one of the important raw materials for automobile tires and cold-resistant products. Herein, a traditional rubber preparation process was used to introduce dynamic reversible bonds into BR based on an “imitative” click reaction. Compared with traditional complex self-healing techniques, this method is undoubtedly simpler and more efficient. Dynamic reversible bonds are able to break and recombine under the stimulation of external conditions, which endow rubber with self-healing properties. We use the small biological molecule lipoic acid (LA) as a cross-linking agent and cross-link LA and BR through mechanical compounding and hot press vulcanization to obtain self-healing butadiene rubber (BLA). In addition, BLA-(Zn2+) was further prepared by introducing Zn2+ to form metal-oxygen coordination bonds with carboxyl groups. And systematically studied the effect of Zn2+ on the mechanical properties and self-healing properties of cross-linked BR. Through the combined action of disulfide bonds, hydrogen bonds and Zn2+-O coordination bonds, BLA-(Zn2+) has better properties than BLA, the tensile strength can reach 3.76 MPa, and the repair efficiency is about 82 %. This simple preparation process is certainly more cost effective.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48444381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-30DOI: 10.1515/polyeng-2023-0056
Anna E. Ivbanikaro, J. Okonkwo, E. Sadiku, C. Maepa
Abstract Water pollution is an issue of global concern that demands effective and sustainable solutions through water purification. Adsorption is a popular method for water treatment because it is inexpensive and has a high performance rate. Although commercial activated carbon is the generally preferred adsorbent for adsorption, its widespread use is affected by the high cost and challenges encountered during column adsorption. Biopolymers like cellulose and its derivatives have the potential to replace expensive adsorbents due to their unique characteristics. In recent years, cellulose-bead nanocomposites have gained significant attention as promising adsorbents due to their ability to circumvent the challenges encountered when using powdered adsorbents. To fabricate cellulose beads, cellulose fiber is separated from its source, dissolved in appropriate solvents, shaped into spherical particles and subsequently modified (via esterification, oxidation, crosslinking agents, etc.) to improve its adsorption capacity. This comprehensive review paper presents a detailed analysis of the recent development in the formation and surface modification of 3-D structured cellulose nanocomposites. The outcome of this review on modified cellulose-bead demonstrates their successful fabrication and high adsorption capacities for different contaminants. It is anticipated that cellulose beads, as a bio-adsorbent in industrial settings, will be a low-cost alternative to the more expensive adsorbents shortly.
{"title":"Recent development in the formation and surface modification of cellulose-bead nanocomposites as adsorbents for water purification: a comprehensive review","authors":"Anna E. Ivbanikaro, J. Okonkwo, E. Sadiku, C. Maepa","doi":"10.1515/polyeng-2023-0056","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0056","url":null,"abstract":"Abstract Water pollution is an issue of global concern that demands effective and sustainable solutions through water purification. Adsorption is a popular method for water treatment because it is inexpensive and has a high performance rate. Although commercial activated carbon is the generally preferred adsorbent for adsorption, its widespread use is affected by the high cost and challenges encountered during column adsorption. Biopolymers like cellulose and its derivatives have the potential to replace expensive adsorbents due to their unique characteristics. In recent years, cellulose-bead nanocomposites have gained significant attention as promising adsorbents due to their ability to circumvent the challenges encountered when using powdered adsorbents. To fabricate cellulose beads, cellulose fiber is separated from its source, dissolved in appropriate solvents, shaped into spherical particles and subsequently modified (via esterification, oxidation, crosslinking agents, etc.) to improve its adsorption capacity. This comprehensive review paper presents a detailed analysis of the recent development in the formation and surface modification of 3-D structured cellulose nanocomposites. The outcome of this review on modified cellulose-bead demonstrates their successful fabrication and high adsorption capacities for different contaminants. It is anticipated that cellulose beads, as a bio-adsorbent in industrial settings, will be a low-cost alternative to the more expensive adsorbents shortly.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45075495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Hip prostheses generate higher frictional heat than natural joints at the joint head-socket interface during in vivo service, resulting in higher temperatures of the contact surfaces and surrounding synovial fluid, which affects the frictional properties of the prosthetic material. In order to clarify the influence mechanism of frictional heat on the tribological behavior of ultra-high molecular weight polyethylene (UHMWPE) for acetabular replacement, the tribological tests of three contact pairs were carried out under different synovial fluid temperatures in this research. Furthermore, the movement processes of the molecular chain structure of UHMWPE during friction were simulated by Materials Studio (MS), and the mechanism of oxidative degradation was discussed. The results show that the temperature of synovial fluid has a significant effect on the friction and wear resistance of UHMWPE and the lubrication characteristics of synovial fluid. At the same time, the action mechanism of the proteins in the synovial fluid that gradually precipitate with the temperature rise to participate in the friction process is related to the friction pair material and contact mode. The synergistic effect of temperature rise and friction will accelerate the oxidative degradation reaction of UHMWPE and form ketone and alcohol oxides on its surface, thus reducing its wear resistance.
{"title":"Tribological behavior of ultra-high molecular weight polyethylene (UHMWPE) for acetabular replacement under frictional heat based on molecular dynamics","authors":"Songquan Wang, Kaijun Wang, Xingxing Fang, Da-hang Li, Hao Lin, Yong Guo","doi":"10.1515/polyeng-2023-0078","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0078","url":null,"abstract":"Abstract Hip prostheses generate higher frictional heat than natural joints at the joint head-socket interface during in vivo service, resulting in higher temperatures of the contact surfaces and surrounding synovial fluid, which affects the frictional properties of the prosthetic material. In order to clarify the influence mechanism of frictional heat on the tribological behavior of ultra-high molecular weight polyethylene (UHMWPE) for acetabular replacement, the tribological tests of three contact pairs were carried out under different synovial fluid temperatures in this research. Furthermore, the movement processes of the molecular chain structure of UHMWPE during friction were simulated by Materials Studio (MS), and the mechanism of oxidative degradation was discussed. The results show that the temperature of synovial fluid has a significant effect on the friction and wear resistance of UHMWPE and the lubrication characteristics of synovial fluid. At the same time, the action mechanism of the proteins in the synovial fluid that gradually precipitate with the temperature rise to participate in the friction process is related to the friction pair material and contact mode. The synergistic effect of temperature rise and friction will accelerate the oxidative degradation reaction of UHMWPE and form ketone and alcohol oxides on its surface, thus reducing its wear resistance.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48132969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-10DOI: 10.1515/polyeng-2023-0103
I. S. Ramakoti, A. K. Panda, Narayan Gouda
Abstract Nanoparticles (NPs) are being incorporated into pristine polymeric matrices as well as recycled waste polymers to prepare new materials with enhanced properties called polymer nanocomposites (PNCs). There has been an accelerating growth in the field of polymer nanocomposites in the last two decades owing to their tunable and enhanced optical, thermal, electrical, magnetic, and mechanical properties, which make them viable and well-suited for various applications. The addition of nanoparticles in the form of nanosheets, nanotubes, nanospheres, quantum dots, etc., to the polymer matrices reduces the drawbacks of polymers like low mechanical strength, weaker chemical resistivity, etc. due to the large surface area to volume ratio of NPs. Moreover, the interaction of nanoparticles with the polymer chain lowers the permeability of gases and increases the water resistance of the polymer. Due to their remarkable capabilities, polymer nanocomposites have attracted significant theoretical interest as well as a large number of practical applications in a variety of scientific and technological domains. This article provides an overview of the various classes of nanoparticles and different fabrication methods used to produce polymer nanocomposites. Additionally, an effort is made to comprehend the properties and applications of polymer nanocomposites in different areas like wastewater treatment, dye removal, heavy metal and gas sensing, optoelectronics, etc.
{"title":"A brief review on polymer nanocomposites: current trends and prospects","authors":"I. S. Ramakoti, A. K. Panda, Narayan Gouda","doi":"10.1515/polyeng-2023-0103","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0103","url":null,"abstract":"Abstract Nanoparticles (NPs) are being incorporated into pristine polymeric matrices as well as recycled waste polymers to prepare new materials with enhanced properties called polymer nanocomposites (PNCs). There has been an accelerating growth in the field of polymer nanocomposites in the last two decades owing to their tunable and enhanced optical, thermal, electrical, magnetic, and mechanical properties, which make them viable and well-suited for various applications. The addition of nanoparticles in the form of nanosheets, nanotubes, nanospheres, quantum dots, etc., to the polymer matrices reduces the drawbacks of polymers like low mechanical strength, weaker chemical resistivity, etc. due to the large surface area to volume ratio of NPs. Moreover, the interaction of nanoparticles with the polymer chain lowers the permeability of gases and increases the water resistance of the polymer. Due to their remarkable capabilities, polymer nanocomposites have attracted significant theoretical interest as well as a large number of practical applications in a variety of scientific and technological domains. This article provides an overview of the various classes of nanoparticles and different fabrication methods used to produce polymer nanocomposites. Additionally, an effort is made to comprehend the properties and applications of polymer nanocomposites in different areas like wastewater treatment, dye removal, heavy metal and gas sensing, optoelectronics, etc.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48692150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-08DOI: 10.1515/polyeng-2023-0071
A. Aggarwal, M. K. Sah
Abstract Tissue engineering is emerging as an effective and alternate strategy for healing the impaired bones. This study reports the development of potential and novel bone tissue regenerating matrices from the avian eggshell membrane derived collagen dispersed in poly-(vinyl alcohol) (PVA). The concentration of the aqueous collagen dispersions within the PVA solution were varied from 0.5 % to 2 % (w/V); and the sols were subjected to varying freeze-thaw cycles to achieve gelation; leading to the fabrication of hydrogel matrices. The developed hydrogels were investigated for their physico-chemical characteristics through the ATR-FTIR, XRD, FESEM and biocompatibility measurements. The ATR-FTIR results showed the presence of amide A, amide I and hydroxyl groups; which were further reinstated by the XRD studies. The morphological and topological analysis of the different hydrogel groups was made through FESEM. It comprised of the measurements of pore dimensions ranging (3.98 ± 1.84 µm to 9.24 ± 5.55 µm), percentage porosity (47 %–97 %), and average surface roughness (21–39 µm); thus, indicating them to be analogous support systems for bone tissue regeneration. Further, L929 mouse fibroblasts grown over these support systems showed excellent cell viability, thus hinting towards its competitive features and application towards remedial bone regeneration.
{"title":"Fabrication of avian eggshell membrane derived dispersed collagen hydrogels for potential bone regeneration","authors":"A. Aggarwal, M. K. Sah","doi":"10.1515/polyeng-2023-0071","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0071","url":null,"abstract":"Abstract Tissue engineering is emerging as an effective and alternate strategy for healing the impaired bones. This study reports the development of potential and novel bone tissue regenerating matrices from the avian eggshell membrane derived collagen dispersed in poly-(vinyl alcohol) (PVA). The concentration of the aqueous collagen dispersions within the PVA solution were varied from 0.5 % to 2 % (w/V); and the sols were subjected to varying freeze-thaw cycles to achieve gelation; leading to the fabrication of hydrogel matrices. The developed hydrogels were investigated for their physico-chemical characteristics through the ATR-FTIR, XRD, FESEM and biocompatibility measurements. The ATR-FTIR results showed the presence of amide A, amide I and hydroxyl groups; which were further reinstated by the XRD studies. The morphological and topological analysis of the different hydrogel groups was made through FESEM. It comprised of the measurements of pore dimensions ranging (3.98 ± 1.84 µm to 9.24 ± 5.55 µm), percentage porosity (47 %–97 %), and average surface roughness (21–39 µm); thus, indicating them to be analogous support systems for bone tissue regeneration. Further, L929 mouse fibroblasts grown over these support systems showed excellent cell viability, thus hinting towards its competitive features and application towards remedial bone regeneration.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47735047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-04DOI: 10.1515/polyeng-2023-0055
Q. Li, Fen Li, Ying Yang, Hong Yan, Youjing Li, M. Zheng, Huiyun Chen
Abstract Two lignin-based composite films were prepared by solution casting, which were named Cu-CLA/PVA and CuO-LA/PVA/CNF, respectively. The kinetic and thermodynamic analyses of the deodorization process of the composite membranes were performed by using adsorption models. The results showed that both membranes had good adsorption performance for H2S with the adsorption amounts of 36.39 mg g−1 and 35.69 mg g−1, respectively. The adsorption processes were mainly following the pseudo-secondary kinetic model, intraparticle diffusion model, and Freundlich isothermal adsorption model, indicating that the intraparticle diffusion resistance controlled the H2S adsorption rate and H2S was adsorbed on the non-homogeneous surface of the membranes through multiple layers. The adsorption of H2S by Cu-CLA/PVA is an exothermic process, while the adsorption of H2S by CuO-LA/PVA/CNF is a heat-absorbing process, indicating that Cu-CLA/PVA is more suitable for H2S adsorption at low temperatures, but CuO-LA/PVA/CNF, at higher temperatures, is favorable for H2S adsorption reactions. △G is negative of both Cu-CLA/PVA and CuO-LA/PVA/CNF, indicating that both Cu-CLA/PVA and CuO-LA/PVA/CNF are spontaneous for H2S adsorption.
{"title":"Kinetic and thermodynamic studies of H2S adsorption by lignin-based composite membranes","authors":"Q. Li, Fen Li, Ying Yang, Hong Yan, Youjing Li, M. Zheng, Huiyun Chen","doi":"10.1515/polyeng-2023-0055","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0055","url":null,"abstract":"Abstract Two lignin-based composite films were prepared by solution casting, which were named Cu-CLA/PVA and CuO-LA/PVA/CNF, respectively. The kinetic and thermodynamic analyses of the deodorization process of the composite membranes were performed by using adsorption models. The results showed that both membranes had good adsorption performance for H2S with the adsorption amounts of 36.39 mg g−1 and 35.69 mg g−1, respectively. The adsorption processes were mainly following the pseudo-secondary kinetic model, intraparticle diffusion model, and Freundlich isothermal adsorption model, indicating that the intraparticle diffusion resistance controlled the H2S adsorption rate and H2S was adsorbed on the non-homogeneous surface of the membranes through multiple layers. The adsorption of H2S by Cu-CLA/PVA is an exothermic process, while the adsorption of H2S by CuO-LA/PVA/CNF is a heat-absorbing process, indicating that Cu-CLA/PVA is more suitable for H2S adsorption at low temperatures, but CuO-LA/PVA/CNF, at higher temperatures, is favorable for H2S adsorption reactions. △G is negative of both Cu-CLA/PVA and CuO-LA/PVA/CNF, indicating that both Cu-CLA/PVA and CuO-LA/PVA/CNF are spontaneous for H2S adsorption.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":" ","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43504483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：