Tenside Surfactants Detergents最新文献_第9页

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-06-13 DOI: 10.1515/tsd-2022-2477

A. Srivastava, Ruchi Singh, N. Srivastava, R. Naik

{"title":"Kinetic study of Ru(III) – catalyzed oxidation of L-phenylalanine by hexacyanoferrate(III) in an anionic surfactant medium","authors":"A. Srivastava, Ruchi Singh, N. Srivastava, R. Naik","doi":"10.1515/tsd-2022-2477","DOIUrl":"https://doi.org/10.1515/tsd-2022-2477","url":null,"abstract":"Abstract The kinetic investigation of Ru(III) promoted oxidation of L-phenylalanine (L-PheAla) by [Fe(CN)6]3− has been performed in anionic sodium dodecyl sulfate (SDS) micellar medium by recording the decrease in absorbance at 420 nm corresponding to [Fe(CN)6]3− using an UV–visible spectrophotometer. Using the pseudo-first-order condition, the course of the reaction was studied as a function of [Fe(CN)63−], ionic strength, [OH−], [SDS], [Ru3+], [L-PheAla] and temperature by changing one variable at a time. The results exhibit that [OH−], [SDS], and [L-PheAla] are the crucial parameters that have an appreciable influence on the reaction rate. The reaction exhibits first-order kinetics in concentration ranges of Ru(III), [Fe(CN)6]3− and at low [L-PheAla] and [OH−] concentrations. The incremental trend observed in the reaction rate with electrolyte concentration shows a positive salt effect. The reaction rate is almost 10 times faster in SDS micellar medium than in aqueous medium. [Fe(CN)6]3− has no appreciable effect on the CMC of SDS, since the polar head of SDS and [Fe(CN)6]3− are both negatively charged. The K+ obtained from K3[Fe(CN)6] and KNO3 decreases the repulsion between the negatively charged heads of the surfactant molecules, which decreases the CMC of SDS. The activation parameters also support the outer-sphere electron transfer mechanism.","PeriodicalId":22258,"journal":{"name":"Tenside Surfactants Detergents","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43820630","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}

引用次数: 0

Felodipine-loaded Spanlastics: superior nanocarriers for transdermal delivery 非洛地平负载的塑料:优越的纳米载体透皮递送

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-06-09 DOI: 10.1515/tsd-2022-2483

Richa Mahesh Natekar, C. E. M. DCruz, L R Amruth Kumar, P. Bhide, R. Shirodkar

{"title":"Felodipine-loaded Spanlastics: superior nanocarriers for transdermal delivery","authors":"Richa Mahesh Natekar, C. E. M. DCruz, L R Amruth Kumar, P. Bhide, R. Shirodkar","doi":"10.1515/tsd-2022-2483","DOIUrl":"https://doi.org/10.1515/tsd-2022-2483","url":null,"abstract":"Abstract Felodipine is a dihydropyridine calcium channel blocker commonly used for the treatment of mild to moderate hypertension and angina pectoris. Felodipine undergoes extensive hepatic first pass metabolism resulting in low oral bioavailability of 15 %. The aim of this study is to develop a formulation of nanovesicular Spanlastics to improve the transdermal delivery of felodipine and solve the problem of low bioavailability. The felodipine-loaded Spanlastics were prepared using the ethanol injection method with Span 60 as surfactant and Tween 80, which provides elasticity to the vesicles, according to the 23 factorial design using Design Expert® Software version 13. The solution that had the highest desirability was optimized. The final five runs were incorporated into a gel base and evaluated for in vitro drug release, spreadability and viscosity. Stability studies were conducted over a period of 3 months. The formulated Spanlastics had a particle size in the range of (132–155) nm and an entrapment efficiency in the range of (80–94) %. The final five runs were found to have optimum characteristics. Differential scanning calorimetry, X-ray diffraction studies and Fourier transform infrared studies were performed to ensure the encapsulation of the drug in the nanovesicles. The developed hydrogel showed in vitro drug release in the range of (80–94) % and the formulation was found to be stable after a period of 3 months. The optimized formula comprised of Span 60 and Tween 80 in ratio of 8:2. Overall, the results confirmed that Spanlastics loaded with felodipine proved to be superior nanocarriers for transdermal delivery of felodipine.","PeriodicalId":22258,"journal":{"name":"Tenside Surfactants Detergents","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43470034","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}

引用次数: 0

Single batch co-production of Pseudomonad polyhydroxybutyrate and rhamnolipids on wasted cooking oil under salinity stress 盐胁迫下利用废弃食用油单批联产多羟基丁酸假单胞菌和鼠李糖脂

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-06-08 DOI: 10.1515/tsd-2023-2511

Z. A. Raza, Muhammad Rizwan Tariq

{"title":"Single batch co-production of Pseudomonad polyhydroxybutyrate and rhamnolipids on wasted cooking oil under salinity stress","authors":"Z. A. Raza, Muhammad Rizwan Tariq","doi":"10.1515/tsd-2023-2511","DOIUrl":"https://doi.org/10.1515/tsd-2023-2511","url":null,"abstract":"Abstract Polyhydroxyalkanoates (PHAs) are emerging biodegradable bioplastics, and rhamnolipids are sustainable biosurfactants; both are considered as alternatives to synthetic petroleum-based plastics and surfactants, respectively. Herein, the effects of three distinct nitrogen sources on PHAs and rhamnolipid yields during the fermentation process have been undertaken. The study focuses on the optimum co-production of PHAs and rhamnolipid using a Pseudomonas aeruginosa strain grown on wasted soybean oil (WSO) with different nitrogen sources in the minimal salts’ media under salinity stress with shake flask conditions. The yields of PHAs and rhamnolipids were observed to be 2.20 g L−1 and 1.02 g L−1, respectively, with carbamide as the sole nitrogen and WSO (2 %, w/v) as the sole carbon source. The fermentative yields of both PHAs (2.37 g L−1) and rhamnolipids (1.24 g L−1) roughly increased up to 8 % under salinity stress. The products were characterized using advanced analytical techniques. The chemical structure of rhamnolipid with this strain had previously been elucidated, whereas the PHA produced was identified as a poly(hydroxybutyrate).","PeriodicalId":22258,"journal":{"name":"Tenside Surfactants Detergents","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49285979","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}

引用次数: 0

CuCl2-modified ionic liquids for alkylation of benzene with 1-dodecene 苯与1-十二烯烷基化用cucl2修饰离子液体

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-06-08 DOI: 10.1515/tsd-2022-2493

Yarou Yang, Xu Li, Jinxiang Dong

{"title":"CuCl2-modified ionic liquids for alkylation of benzene with 1-dodecene","authors":"Yarou Yang, Xu Li, Jinxiang Dong","doi":"10.1515/tsd-2022-2493","DOIUrl":"https://doi.org/10.1515/tsd-2022-2493","url":null,"abstract":"Abstract Benzene and 1-dodecene are often alkylated to produce linear alkylbenzene (LAB). LAB is the raw material for the production of linear alkylbenzene sulfonate (LAS), a very important anionic surfactant used in both industrial cleaning and commercial laundry processes, as well as in household laundry detergents. In the present study, we investigated the use of [Et3NH]Cl–2AlCl3 modified with CuCl2 as a catalyst for the alkylation of benzene with 1-dodecene, specifically looking at the effect of reaction conditions on product activity. The results showed that a conversion of 1-dodecene of 100.0 % and a selectivity of LAB of 93.79 % could be obtained when the following ideal reaction conditions were present: molar ratio of benzene/1-dodecene = 6, reaction temperature = 25 °C, reaction time = 10 min, stirring speed of 1000 rpm and addition of 5.0 mol % CuCl2). The catalyst concentration was 7.0 mol %. FTIR and 31P-TMPO-NMR measurements were performed to characterise the ionic liquid before and after the addition of CuCl2. After the addition of CuCl2, it was found that the acidity of the ionic liquid had decreased. The regeneration of the catalyst was also investigated and the cause of inactivation of the catalyst was determined. The results showed that CuCl2 modified the ionic liquids and decreased the benzene/1-dodecene ratio, but the high product selectivity was maintained.","PeriodicalId":22258,"journal":{"name":"Tenside Surfactants Detergents","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44963900","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}

引用次数: 0

Effects of surfactants and enzymes on the direct determination of protein on fabric using the BCA reaction 表面活性剂和酶对BCA反应直接测定织物蛋白质的影响

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-06-07 DOI: 10.1515/tsd-2023-2507

Mai Tsukazaki, M. Morita, Y. Yoneyama

引用次数: 0

Surface and foaming properties of an anionic CO2-switchable tail surfactant 阴离子型co2可切换尾部表面活性剂的表面和发泡性能

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-06-06 DOI: 10.1515/tsd-2023-2524

Robin R. Benedix, Hailey Poole, D. Zauser, Natalie Preisig, P. Jessop, C. Stubenrauch

引用次数: 1

Frontmatter 头版头条

4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-05-01 DOI: 10.1515/tsd-2023-frontmatter3

引用次数: 0

Study on the properties of amide Gemini surfactants 酰胺Gemini表面活性剂的性能研究

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-05-01 DOI: 10.1515/tsd-2022-2468

Y. Cai, Hujun Xu, Peng Ling

引用次数: 0

Study on the synthesis and properties of cardanol sulfonate 腰果酚磺酸盐的合成及性能研究

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-04-21 DOI: 10.1515/tsd-2022-2455

Yue Liu, Hujun Xu, Jingguo Yang, Haiyan Gao

{"title":"Study on the synthesis and properties of cardanol sulfonate","authors":"Yue Liu, Hujun Xu, Jingguo Yang, Haiyan Gao","doi":"10.1515/tsd-2022-2455","DOIUrl":"https://doi.org/10.1515/tsd-2022-2455","url":null,"abstract":"Abstract In this work, using the natural product cardanol and chlorosulfonic acid as the main raw materials, the anionic surfactant cardanol sulfonate (CDS) was synthesised and investigated for its surface properties and thermodynamic properties using surface tension, conductivity and fluorescence methods. In addition, the application properties of CDS, such as foaming and cleaning ability were investigated and compared with those of sodium dodecylbenzene sulfonate (SDBS). The structure of the surfactant was characterised by FTIR, 1H NMR and MS. The Krafft point of the surfactant was below 25 °C, indicating good water solubility. The CMC values were determined by surface tension, conductivity and micropolarity measurements. The obtained CMCs agreed well within the measuring accuracy. The CMC increased with increasing temperature. As a function of temperature, the following CMC values were obtained: 5.13 × 10−3 mol L−1 (25 °C), 5.63 × 10−3 mol L−1 (35 °C) and 5.77 × 10−3 mol L−1 (45 °C). The values of surface tensions at the respective CMCs were γ CMC = 44.47 mN m−1 (25 °C), 43.53 mN m−1 (35 °C), and 42.45 mN m−1 (45 °C). The application property results showed that the foaming capacity, foam stabilisation and cleaning ability of CDS and SDBS were similar to each other, indicating that CDS can be used as a raw material for commercial detergent production.","PeriodicalId":22258,"journal":{"name":"Tenside Surfactants Detergents","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42564399","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}

引用次数: 1

The effects of SDS, APG, and DTAB surfactants on the morphology of micro-nano RDX particles prepared in a microfluidic reactor SDS、APG和DTAB表面活性剂对微流控反应器中制备的微纳RDX颗粒形态的影响

IF 1 4区工程技术

Tenside Surfactants Detergents Pub Date : 2023-04-21 DOI: 10.1515/tsd-2022-2482

Ying Li, YiFan Zhang, Le-wu Zhan, Jing Hou, Bin-dong Li

引用次数: 1