Polymer Bulletin最新文献_第8页

Novel chitosan/polyvinyl alcohol gel encapsulating ethanolic Centella asiatica extract for cosmeceutical applications

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-17 DOI: 10.1007/s00289-024-05543-z

Nguyen Quoc Thanh, Dao Hien Mai, Tam Phung Anh Le, Nga H. N. Do, Phung K. Le

{"title":"Novel chitosan/polyvinyl alcohol gel encapsulating ethanolic Centella asiatica extract for cosmeceutical applications","authors":"Nguyen Quoc Thanh, Dao Hien Mai, Tam Phung Anh Le, Nga H. N. Do, Phung K. Le","doi":"10.1007/s00289-024-05543-z","DOIUrl":"10.1007/s00289-024-05543-z","url":null,"abstract":"<div><p><i>Centella asiatica</i> (<i>C. asiatica</i>) possesses various skin-beneficial properties such as antioxidants, anti-inflammatory, antibacterial, and wound healing activities. In this study, a novel approach has been conducted for the first time by incorporating <i>C. asiatica</i> extract into a peel-off gel of chitosan (CS) and polyvinyl alcohol (PVA) via a straightforward and eco-friendly blending process. This method reveals several advantages, including the simplicity of the formulation, the utilization of biodegradable ingredients, good gel stability, and ease of production. The total extraction yield of the <i>C. asiatica</i> extract is in the range of 22.5 ± 0.69%–33.5 ± 1.02%, along with total phenolic content (133.2 ± 4.1–221.0 ± 7.6 mg gallic acid/g extract), total flavonoid content (371.7 ± 3.6–423.5 ± 15.1 mg rutin/g extract), and total triterpenoid content (562.0 ± 23.5–869.5 ± 47.6 mg ursolic acid/g extract). Moreover, the <i>C. asiatica</i> extracts show moderate antibacterial activity against <i>Cutibacterium acnes</i>, <i>Staphylococcus epidermidis</i>, and <i>Escherichia coli</i>, but an effective antioxidant ability with an EC<sub>50</sub> value of 12.74 ± 0.13 (μg/mL) which is approx. 2.45 times lower than that of the extract obtained in the previous work. Regarding the synthesis of CS/PVA gel encapsulated in the extract, the formulation using 20% ethanol shows a smooth-surfaced and uniformly structure, natural hydrophilicity, a drying time within 25–30 min, a spreadability of 47.6–58.5 mm, and excellent swelling ratio of up to 4200%. The mechanical properties of the dried CS/PVA/extract gels, including elongation (100–199%), tensile strength (13–19.9 N/mm<sup>2</sup>), and folding endurance (more than 250 times), indicate that the developed gels own favorable qualities for facial mask applications.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 2","pages":"523 - 541"},"PeriodicalIF":3.1,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scaling the ionic conductivity and electrochemical properties of bio-based gel polymer electrolytes reinforced with Al2O3 nanofibers for energy storage applications

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-16 DOI: 10.1007/s00289-024-05542-0

Masum Das, Madhabi Konwar, Utpal Sadhonider, Lakhya J. Borthakur, Utpal J. Mahanta, Lakshi Saikia, Madhuryya Deka

{"title":"Scaling the ionic conductivity and electrochemical properties of bio-based gel polymer electrolytes reinforced with Al2O3 nanofibers for energy storage applications","authors":"Masum Das, Madhabi Konwar, Utpal Sadhonider, Lakhya J. Borthakur, Utpal J. Mahanta, Lakshi Saikia, Madhuryya Deka","doi":"10.1007/s00289-024-05542-0","DOIUrl":"10.1007/s00289-024-05542-0","url":null,"abstract":"<div><p>Bio-based gel polymer electrolytes (GPEs) are gaining popularity in electrochemical energy storage devices due to their sustainability and environmental friendliness. Compared to synthetic polymer electrolytes, they are biocompatible and less toxic, making them safer for users and the environment. The present work develops cellulose acetate-based GPEs added with different amounts of Al<sub>2</sub>O<sub>3</sub> nanofibers. The synthesized GPE exhibits a very high ionic conductivity of 2 × 10<sup>–3</sup> S/cm at room temperature as determined by impedance spectroscopy. FTIR results show that Al<sub>2</sub>O<sub>3</sub> nanofibers are able to dissociate Li<sup>+</sup> ions from contact ion pairs. XRD analysis demonstrates that the nanofibers can reduce the crystallinity of GPEs. From XPS studies it is confirmed that the nanofibers create conducting paths in GPEs through which ion diffusion can easily take place. Electrochemical investigations demonstrate that GPEs containing nanofibers display a remarkable voltage range of 4.9 V and great stability at the interface with metallic electrodes. Nanofibers can also increase the cationic transport number from 0.28 for GPEs with no nanofibers to 0.58 for GPEs loaded with 5 wt% nanofibers. The dimensional stability of GPEs is also found to be enhanced after nanofiber addition. The initial discharge capacity at 0.5 C for the Li|BGE|LiFePO<sub>4</sub> cell was recorded to be 135 mAh g<sup>−1</sup> in the first cycle and 128 mAh g<sup>−1</sup> with a coulombic efficiency above 95% after 25 cycles. These findings of the study suggest that nanofiber-reinforced bio-based GPEs can create high-performance, sustainable electrolytes for next-generation electrochemical devices.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 2","pages":"501 - 522"},"PeriodicalIF":3.1,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of Gelatin-based 3D hydrogel scaffold for effective removal of Methylene Blue and Alizarin Red S from aqueous solutions and food samples: kinetic and isotherm investigations

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-16 DOI: 10.1007/s00289-024-05541-1

Qurat ul Ain Fatima, Saeed Ahmad Khan, Mansoor Khan, Wei Sun, Riaz Ullah, Abdelaaty A. Shahat, Essam A. Ali, Umar Nishan, Amir Badshah

{"title":"Optimization of Gelatin-based 3D hydrogel scaffold for effective removal of Methylene Blue and Alizarin Red S from aqueous solutions and food samples: kinetic and isotherm investigations","authors":"Qurat ul Ain Fatima, Saeed Ahmad Khan, Mansoor Khan, Wei Sun, Riaz Ullah, Abdelaaty A. Shahat, Essam A. Ali, Umar Nishan, Amir Badshah","doi":"10.1007/s00289-024-05541-1","DOIUrl":"10.1007/s00289-024-05541-1","url":null,"abstract":"<div><p>The extensive use of organic dyes reduces the quality of the water and adversely affects aquatic organisms. In recent years, researchers have become more interested in the adsorptive removal of dyes. Herein, biodegradable gelatin-based 3D hydrogels are cross-linked with epichlorohydrin, named as gelatin hydrogel under acidic conditions (GHA) and gelatin hydrogel under basic conditions (GHB). The synthesis of the desired hydrogels were confirmed using Fourier transformation infrared spectroscopy and scanning electron microscopy. They were used successfully for the adsorptive removal of dyes such as methylene blue (MB) and alizarin red S (ARS) from aqueous solutions and food samples. The optimization study shows that maximum adsorptive removal of MB and ARS were obtained at pH range of 4 to 9. The maximum adsorption capacities in the case of GHA for MB and ARS were 19.5 mgg<sup>−1</sup> and 19.9 mgg<sup>−1</sup>, respectively. Whereas, in the case of GHB, the maximum adsorption capacities for MB and ARS were 18.9 mgg<sup>−1</sup> and 19.7 mgg<sup>−1</sup>, respectively. The percent adsorption values in the range of 72 ± 2‒100 ± 2 shows that the developed methods can be successfully applied to water and food samples. Furthermore, both adsorbents follow the Freundlich adsorption isotherm and pseudosecond-order kinetics. Gelatin-3D hydrogels have significant adsorption capacity and are environmentally friendly, low-cost, and easy to synthesize. These qualities make them excellent platforms for the adsorptive removal of dyes from wastewater.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 2","pages":"479 - 500"},"PeriodicalIF":3.1,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and properties of silicone modified BA/MMA/VAc/VeoVa10 quaternary polymer latex

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-15 DOI: 10.1007/s00289-024-05536-y

Zheqing Gong, Lijun Chen

{"title":"Preparation and properties of silicone modified BA/MMA/VAc/VeoVa10 quaternary polymer latex","authors":"Zheqing Gong, Lijun Chen","doi":"10.1007/s00289-024-05536-y","DOIUrl":"10.1007/s00289-024-05536-y","url":null,"abstract":"<div><p>Butyl acrylate, methyl methacrylate, vinyl acetate and tertiary vinyl carbonate (VeoVa10) are the main monomers, and alkyl alcohol polyether sulfosuccinate monoester sodium salt (A-6820) and alkyl alcohol polyoxyethylene ether (EFS-900) are used as the emulsifiers. Vinyl triethoxysilane is used as the modified monomers. Potassium persulfate is the initiator. The silicon-modified polymer latex is prepared via the semi-continuous seeded emulsion polymerization. The structure of the latex film is characterized by Fourier transform infrared spectroscopy. Latex films are tested by the thermogravimetric analysis, differential scanning calorimetry and contact angle. The particle size of the latex is measured with the zetatrac dynamic light scattering instrument. The conditions for preparing the resultant latex is optimized and obtained as follows: the amount of emulsifier is 6 wt%; the amount of initiator is 0.4 wt% and the amount of VETS is 4 wt%. The appearance of the resultant latex is translucent and blue, and the average particle size of the polymer latex and its distribution is small. The water contact angle increased from 68.07 to 91.00 °. Thermal decomposition temperature of the film of the silicone-modified polymer latex is 16.17 °C higher than that of the film of conventional polymer latex.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 2","pages":"423 - 436"},"PeriodicalIF":3.1,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A solid composite electrolyte poly(PEGDA-co-AN)/LiTFSI/nano-SiO2 with high conductivity and high entropy structure and its Li+ transport behavior

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-15 DOI: 10.1007/s00289-024-05540-2

Yafei Zhang, Xiao Wu, Shunjin Peng

{"title":"A solid composite electrolyte poly(PEGDA-co-AN)/LiTFSI/nano-SiO2 with high conductivity and high entropy structure and its Li+ transport behavior","authors":"Yafei Zhang, Xiao Wu, Shunjin Peng","doi":"10.1007/s00289-024-05540-2","DOIUrl":"10.1007/s00289-024-05540-2","url":null,"abstract":"<div><p>Using solid electrolytes instead of traditional liquid electrolytes to assemble all-solid-state batteries can effectively solve the problem of electrolyte leakage and reduce risks caused by lithium dendrite growth during charging and discharging processes, which is capable to improving the safety of lithium battery. Solid polymer electrolytes have been widely studied in consideration of the factors, such as flexible structural design, convenient preparation, low cost, good interface contact with electrodes, and ease of large-scale production. Polyethylene oxide (PEO) polymers have a good solvation for most lithium salts, but PEO segments in polymers have high crystallinity at room temperature and a narrow electrochemical stability window (ESW), which will limit some advanced electrode materials with high potential used in batteries and restricts the improvement of battery performance as well. Polyacrylonitrile (PAN) with high dielectric constant has high electrochemical and thermal stability, good mechanical processing properties, and excellent fire retardancy. In this manuscript, a cross-linked copolymer, poly(PEGDA-co-AN), is prepared using polyethylene glycol diacrylate (PEGDA) and acrylonitrile (AN) as monomers and 2,2-azobisisobutyronitrile (AIBN) as a thermal initiator; the influence of Lewis acid–base interaction between nano-SiO<sub>2</sub> additive and –C≡N or C–O–C on Li<sup>+</sup> transport has been investigated, and a new idea was proposed to improve the lithium ion transport in poly(PEGDA-co-AN)-based polymer composite electrolytes by adjusting the local charge environment of polymer electrolytes. Finally, a composite polymer electrolyte poly(PEGDA-co-AN)/LiTFSI/nano-SiO<sub>2</sub> with high entropy structure and high conductivity has been designed and fabricated, and it exhibits a room temperature ionic conductivity of 3.5 × 10<sup>−3</sup> S cm<sup>−1</sup>, Li<sup>+</sup> transference number of 0.58, and the electrochemical stability window greater than 5 V.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 2","pages":"437 - 454"},"PeriodicalIF":3.1,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flame retardation of epoxy resin with P-N flame retardant based on DOPS/triazine-trione groups

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-15 DOI: 10.1007/s00289-024-05535-z

Xuanying Huan, Zeming Hou, Shikai Ma, Qiu Xu, Yuzhao Qi, Dongmei Bao, Xueqing Hou, Haijun Du, Yupeng Zhang, Zhu Wen

{"title":"Flame retardation of epoxy resin with P-N flame retardant based on DOPS/triazine-trione groups","authors":"Xuanying Huan, Zeming Hou, Shikai Ma, Qiu Xu, Yuzhao Qi, Dongmei Bao, Xueqing Hou, Haijun Du, Yupeng Zhang, Zhu Wen","doi":"10.1007/s00289-024-05535-z","DOIUrl":"10.1007/s00289-024-05535-z","url":null,"abstract":"<div><p>Epoxy resin (EP), as a widely used polymer material, is inherently flammable. Imparting it with high-efficiency flame-retardant properties has always been the focus of attention. In this work, using triallyl isocyanurate (TAIC) and 9,10-dihydro-9-oxa-10-phospha phenanthrene-10-sulfide (DOPS) as raw materials, a novel double-group flame retardant, tris(3-(9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-sulfide)-propyl)triazine-2,4,6-trione(DOPS-TAIC), has been synthesized via a one-step method. Before curing, the structure was characterized by FT-IR, <sup>1</sup>H NMR, and <sup>31</sup>P NMR. Subsequently, the flame retardant DOPS-TAIC was applied to EP, and a series of testing methods were employed to investigate the effects of DOPS-TAIC on the thermal stability, flame retardancy, and mechanical properties of EP. Furthermore, the flame retardant mechanism of DOPS-TAIC in the gas phase and condensed phase was further explored. The results showed that EP/DOPS-TAIC achieved a UL-94 V-0 rating with an LOI value of 31.6% when added at 12.5 wt%. In addition, the total heat release, peak heat release rate, and average heat release rate (av-HRR) of EP/DOPS-TAIC-12.5 wt% were significantly reduced by 35.05%, 61.83%, and 51.68%, respectively. SEM-EDS results showed that DOPS-TAIC can effectively promote the generation of expanded dense char layers and retain flame retardant elements (P and S) in the char layer. Meanwhile, TG-IR and Py-GC/MS demonstrate their radical quenching effect in the gas phase, indicating that DOPS-TAIC possesses both condensed-phase and gas-phase flame-retardant mechanisms. Therefore, this study provides a simple and effective method for developing flame-retardant epoxy resins.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 2","pages":"455 - 477"},"PeriodicalIF":3.1,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The optoelectronic device with high efficiency for the incidence photons based on silver iodide/poly-2-aminobenzenethiol-intercalated iodide ion nanowire composite

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-13 DOI: 10.1007/s00289-024-05539-9

Mohamed Rabia, Wassim El Malti, Eman Aldosari, Xuanhua Li

{"title":"The optoelectronic device with high efficiency for the incidence photons based on silver iodide/poly-2-aminobenzenethiol-intercalated iodide ion nanowire composite","authors":"Mohamed Rabia, Wassim El Malti, Eman Aldosari, Xuanhua Li","doi":"10.1007/s00289-024-05539-9","DOIUrl":"10.1007/s00289-024-05539-9","url":null,"abstract":"<div><p>The optoelectronic light sensor device (photodetector) is fabricated using a composite of silver iodide and poly-2-aminobenzenethiol-intercalated iodide ion nanowires (AgI/P2ABT-I NW-C). This device boasts a straightforward fabrication process consisting of only two steps and is characterized by promising nanowires that indicate a high density of active sites. This feature contributes to achieving a desirable bandgap of 1.92 eV. The optoelectronic devices exhibit exceptional sensitivity and efficiency across a range of photon frequencies and energies, from 3.6 to 2.3 eV. Particularly noteworthy is their performance under the influence of high kinetic energy photons within this range. The responsivity (R) and detectivity (D) values demonstrate a consistent behavior, declining linearly from 0.96 to 0.90 mA/W and from 0.21*10<sup>9</sup> to 0.20*10<sup>9</sup> Jones, respectively. Moreover, the corresponding photocurrent (<i>J</i><sub><i>ph</i></sub>) values for photons with energies between 3.6 and 2.3 eV fall within the range of − 0.094 to − 0.089 mA.cm<sup>−2</sup>. These promising results recommend the application of this optoelectronic device in both industrial and commercial sectors. Its ease of fabrication and cost-effectiveness further enhance its appeal for widespread adoption. With its impressive sensitivity and efficiency characteristics, the device holds considerable promise for various applications, ranging from advanced industrial processes to consumer electronics.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 1","pages":"263 - 280"},"PeriodicalIF":3.1,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and application of carboxymethylated tamarind kernel gum (Fe-loaded) based superabsorbent hydrogels to investigate the effect on marigold plant growth

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-12 DOI: 10.1007/s00289-024-05530-4

Anju Sharma, Arpit Sand

{"title":"Synthesis and application of carboxymethylated tamarind kernel gum (Fe-loaded) based superabsorbent hydrogels to investigate the effect on marigold plant growth","authors":"Anju Sharma, Arpit Sand","doi":"10.1007/s00289-024-05530-4","DOIUrl":"10.1007/s00289-024-05530-4","url":null,"abstract":"<div><p>The iron implemented in superabsorbent hydrogel (SAH). SAP (superabsorbent polymer) was modified by intermixing with iron microelement in itaconic acid and carboxymethylated tamarind kernel gum. Different samples were prepared for various compositions of SAH by changing the concentration of monomer, initiator, and cross-linker. Iron chloride was interpenetrated in the best-swelled hydrogels for releasing of iron as micronutrient. The characterization of synthesized hydrogel and modified FSAH was done by FTIR, SEM, and TGA analysis. Different behaviors of synthesized hydrogels in terms of weather conditions and pH (3, 8, and 10) of soil were studied. The swelling degree was studied by kinetic modeling of iron release by using the Higuchi model and the Korsmeyer–Peppas model which represent that high number of regression coefficients (R<sup>2</sup>) more equal to unity, fitted well in the iron release pattern in water and soil. On the other hand, diffusion quotient (n) showed in the Fickian diffusion model applied for the procedure of iron release. The iron superabsorbent hydrogel (FSAH) was used for the study of marigold plants germination and growth. It was also found that the germinated population with FSAH is much higher as compared to those without modified SAH.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 2","pages":"397 - 422"},"PeriodicalIF":3.1,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on the thermal, mechanical, and antibacterial properties of polymer nanocomposites from waste polypropylene and cerium oxide nanoparticles

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-10 DOI: 10.1007/s00289-024-05531-3

I. Siva Ramakoti, Narayan Gouda, Achyut K. Panda

{"title":"Investigation on the thermal, mechanical, and antibacterial properties of polymer nanocomposites from waste polypropylene and cerium oxide nanoparticles","authors":"I. Siva Ramakoti, Narayan Gouda, Achyut K. Panda","doi":"10.1007/s00289-024-05531-3","DOIUrl":"10.1007/s00289-024-05531-3","url":null,"abstract":"<div><p>This work examined the impact of cerium oxide (CeO<sub>2</sub>/ceria) nanoparticles on the thermal, mechanical, and antibacterial properties of nanocomposites made from discarded polypropylene (PP). The synthesis of polypropylene/cerium oxide nanocomposites was achieved using the solution casting process, incorporating nanoceria concentrations ranging from 0 wt.% to 3 wt.%. The morphological features and the particle size of nanoceria were examined by scanning electron microscopy and dynamic light scattering measurements. The characteristics and properties of nanoceria and PP/CeO<sub>2</sub> nanocomposites were analysed using Fourier transform infrared (FTIR) spectroscopy and thermogravimetry (TG). The nanocomposite’s mechanical characteristics were analysed using a universal testing machine (UTM), while its antibacterial activity was investigated using the agar diffusion method. The thermogravimetric analysis revealed that the thermal stability of the nanocomposites increased by 12.63% and 13.10% when 2 and 3 wt.% of CeO<sub>2</sub> nanoparticles were added to the PP. The mechanical property studies demonstrated that the nanocomposites containing 2 wt. % of CeO<sub>2</sub> nanoparticles displayed a significant increase in Young’s modulus (17%) and an exceptional increase in tensile strength (30%) in comparison with PP. Furthermore, the nanocomposites exhibited excellent antibacterial efficacy against two specific strains of gram-negative bacteria, namely <i>Escherichia coli</i> and <i>Klebsiella pneumoniae</i>.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 1","pages":"221 - 244"},"PeriodicalIF":3.1,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of polyurethane/polythiourethane core–shell microspheres via thiol-isocyanate click chemistry and their application in toughening epoxy resin

IF 3.1 3区化学

Polymer Bulletin Pub Date : 2024-10-09 DOI: 10.1007/s00289-024-05533-1

Wei Shi, Jian Li, Chenyi Wang, Qiang Ren

{"title":"Fabrication of polyurethane/polythiourethane core–shell microspheres via thiol-isocyanate click chemistry and their application in toughening epoxy resin","authors":"Wei Shi, Jian Li, Chenyi Wang, Qiang Ren","doi":"10.1007/s00289-024-05533-1","DOIUrl":"10.1007/s00289-024-05533-1","url":null,"abstract":"<div><p>In this study, a novel kind of core–shell microsphere for toughening epoxy resin was developed and investigated. Polyurethane/polythiourethane (PU/PSU)-based core–shell microspheres with polyurethane as the core and polythiourethane as the shell were prepared by dispersion polymerization method via thiol-isocyanate click chemistry. The structure, morphology and particle sizes of PU/PSU core–shell microspheres were investigated by infrared spectroscopy, transmission electron microscopy and scanning electron microscopy. Results showed that the PU/PSU microspheres were successfully fabricated and had a core–shell structure with the particle size of about 0.5–1.5 µm. The PU/PSU core–shell microspheres can be uniformly dispersed in epoxy resin matrix, and the factors which affected the toughening performance of PU/PSU microspheres on the epoxy resin were investigated in detail. When they were used to toughen the epoxy resin, both the tensile strength and impact strength of the epoxy resin can be enhanced simultaneously. When the PU/PSU core–shell ratio was 1:8 and the amount of PU/PSU core–shell microspheres was 8 wt% of epoxy resin, the tensile strength of the epoxy resin toughened by PU/PSU microspheres was 62.5 MPa, which was 1.27 times that of pristine epoxy resin, and the impact strength reached the value of 13.1 kJ/m<sup>2</sup>, which was 2.47 times that of pristine epoxy resin. This study indicates that PU/PSU core–shell microspheres are a kind of novel toughening agent which may find potential applications in toughening thermosetting resins, such as epoxy resin.</p></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 1","pages":"197 - 220"},"PeriodicalIF":3.1,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0