2461-18-9Relevant articles and documents
Synthesis of a novel betaine-type asphalt emulsifier and its investigation by online FTIR spectrophotometry
Huai, Chunlei,Shi, Laishun,Li, Na
, p. 597 - 614 (2013)
A novel betaine-type asphalt emulsifier, 3-(dodecyloxy)-2-hydroxypropan-N- carboxymethyl-N,N-dimethylammonium chloride, has been synthesized in a three-step reaction from lauryl alcohol, epichlorohydrin, dimethylamine, and chloroacetic acid. The optimum reaction conditions were obtained for synthesis of 2-(dodecyloxymethyl)oxirane in the first step. The yield reaches 75.7 % under the optimum conditions of reaction temperature 50 C, reaction time 5 h, feedstock mole ratio of epichlorohydrin to lauryl alcohol 1.4, basicity 33.3 %. The structures of the three products were identified by FTIR. Synthesis of 2-(dodecyloxymethyl)oxirane in the first step was monitored by online FTIR, and an intermediate was detected. On the basis of the experimental data, a plausible reaction mechanism was proposed for the reaction. The critical micelle concentration (CMC) of the final product is low, 8.8 × 10-5 mol/L. The surface tension at the CMC is 21.2 mN/m. This product is an excellent emulsifier for asphalt. The prepared bituminous emulsion had high storage stability. The emulsifier is a rapid-set asphalt emulsifier.
Modification of lignin with dodecyl glycidyl ether and chlorosulfonic acid for preparation of anionic surfactant
Chen, Chang-Zhou,Li, Ming-Fei,Wu, Yu-Ying,Sun, Run-Cang
, p. 16944 - 16950 (2014)
Lignin was modified through incorporation of lipophilic and hydrophilic groups for the preparation of a surfactant. In this case, alkaline lignin reacted with dodecyl glycidyl ether in the presence of dimethyl benzyl amine to incorporate lipophilic long alkyl chains, and then sulfonated with chlorosulfonic acid for the introduction of hydrophilic sulfonic acid groups. Results showed that the reaction between dodecyl glycidyl ether and carboxy group in lignin was the predominant reaction at 95-110 °C. It was found that the surface tension of the synthesized lignin surfactant solution was lower than that of commercial surfactant sodium dodecylbenzenesulphonate when the concentration was below 0.4%, indicating that the surfactant prepared from alkaline lignin had a good surface activity. A lowest critical micelle concentration of 0.50 g L-1 and the corresponding surface tension at 29.17 mN m-1 were achieved when the surfactant was derived from the lignin grafted with dodecyl glycidyl ether at 110 °C. The anionic lignin surfactants prepared in this study are a promising feedstock as detergents or to enhance oil recovery.
DETERGENT FOR SKIN OR HAIR
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Paragraph 0030, (2019/08/27)
PROBLEM TO BE SOLVED: To provide a skin detergent and a hair detergent having excellent foam quality, low skin irritation, and excellent stability at a low temperature. SOLUTION: A detergent for skin or hair contains a compound represented by general formula (1) (A), an anionic surfactant (B), and an ampholytic surfactant (C). R1OCH2CH-[O(AO)mH]-CH2O(AO)nH (1) [where R1 is a C4-18 monovalent hydrocarbon group; m+n AO independently represent an ethyleneoxy group or a propyleneoxy group; m and n independently represent an integer of 0 or greater; m+n is an integer of 1-50]. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
Glucosyl-gemini nonionic surfactant and synthesis method thereof
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Paragraph 0047; 0048; 0058, (2018/03/01)
The invention discloses a glucosyl-gemini nonionic surfactant and a synthesis method thereof. The glucosyl-gemini nonionic surfactant is obtained by performing a reaction on bis(C8-C18 long-chain alkyl glyceryl ether) diamine and glucolactone; the glucosyl-gemini nonionic surfactant combines the advantages of mild and no-irritating texture, high possibility of biodegradation and environmental friendliness of a sugar-based surfactant and also has excellent performances of a gemini surfactant for further improving the surface activity, lowering the critical micelle concentration and the like, and therefore, the glucosyl-gemini nonionic surfactant is a multi-functional surfactant; the glucosyl-gemini nonionic surfactant can be widely applied in the industries of chemicals for daily use, petroleum, pesticides, spinning, paper making, mining and the like, and therefore, the glucosyl-gemini nonionic surfactant has a broad application prospect.
ANTIMICROBIAL AGENT CONTAINING POLYALKYLENEIMINE DERIVATIVE
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, (2017/09/23)
The present invention is an antimicrobial agent containing a polyalkyleneimine derivative formed by adding a substituent group having a structure of a following Formula (1) to a nitrogen atom of polyalkyleneimine. [in-line-formulae]—CH2CH(OH)CH2—O—R1??(1)[/in-line-formulae] In the formula, R1 represents an alkyl group with 6 to 20 carbon atoms, an alkenyl group with 6 to 20 carbon atoms, an aryl group with 6 to 20 carbon atoms, or —(CH2CH2O)n—R2. R2 represents an alkyl group with 6 to 20 carbon atoms, an alkenyl group with 6 to 20 carbon atoms, or an aryl group with 6 to 20 carbon atoms. n represents an integer of 1 to 50.
Synthetic process for 3-dodecyloxy-2-hydroxypropyltrimethyl ammonium chloride
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Paragraph 0010, (2017/03/17)
The invention discloses a synthetic process a synthetic process for 3-dodecyloxy-2-hydroxypropyltrimethyl ammonium chloride. The synthetic process provided by the invention is simple and has high yield. The process comprises the following steps: 1, synthesis of dodecyloxy glycidol ether: a step of adding 18 to 25 g of laurinol, 18 to 24 g of chloropropylene oxide, 13 to 15 g of an aqueous sodium hydroxide solution with a mass percentage of 40%, 1.5 to 2.5 g of tetrabutylammonium bromide and 10 to 20 ml of toluene into a dry three-neck flask and carrying out a stirring reaction at 50 to 70 DEG C for 4 to 6 h; and 2, synthesis of DPAC: a step of adding 8 to 10 g of laurinol, 9 to 12 g of trimethylamine hydrochloride and 10 to 30 ml of ethanol into a dry three-neck flask and carrying out a stirring reaction at 30 to 50 DEG C for 3 to 4 h.
Synthesis, Surface and Antimicrobial Activities of Novel Cationic Gemini Surfactants
Ding, Zhaoyun,Fang, Shimin
, p. 1051 - 1057 (2015/11/18)
A series of novel cationic gemini surfactants [C n H2n+1-O-CH2-CH(OH)-CH2-N+(CH3)2-(CH2)2]2·2Br- [3a (n = 12), 3b (n = 14) and 3c (n = 16)] having a 2-hydroxy-1,3-oxypropylene group [-CH2-CH(OH)-CH2-O-] in the hydrophobic chain have been synthesized and characterized. Their water solubility, surface activity, foaming properties, and antibacterial activity have been examined. The critical micelle concentration (CMC) values of the novel cationic gemini surfactants are one to two orders of magnitude smaller than those of the corresponding monomeric surfactants. Furthermore, the novel cationic gemini surfactants have better water solubility and surface activity than the comparable [C n H2n+1-N+(CH3)2-(CH2)2]2·2Br- (n-4-n) geminis. The novel cationic gemini surfactants 3a and 3b also exhibit good foaming properties and show good antibacterial and antifungal activities.
Synthesis, characterization and evaluation of the surface active properties of novel cationic imidazolium gemini surfactants
Patial, Pankaj,Shaheen, Arifa,Ahmad, Ishtiaque
, p. 253 - 260 (2014/03/21)
New imidazolium gemini surfactants were synthesized by reaction of epichlorohydrin with long chain fatty alcohols furnishing products 2-(alkoxymethyl)oxirane followed by their subsequent treatment with imidazole resulting in the formation of 1-(1H-imidazol-1-yl-3 alkoxy)propane-2-ol which on subsequent treatment with 1,2-dibromoethane and 1,3-dibromopropane resulted in the formation of title gemini surfactants:1,2-bis(1(3-alkoxy-2-hydroxypropyl)- 1H-imidazol-3-ium)ethane bromide (7), 1,3-bis(1(3-alkoxy-2-hydroxypropyl)-1H- imidazol-3-ium)propane bromide (8), 1,2-bis(1(3-alkoxy-2-hydroxypropyl)-1H- imidazol-3-ium)ethane bromide (9), 1,3-bis(1(3-alkoxy-2-hydroxypropyl)-1H- imidazol-3-ium)propane bromide (10), 1,2-bis (1(3-alkoxy-2-hydroxypropyl)-1H- imidazol-3-ium)ethane bromide (11) and 1,3-bis (1(3-alkoxy-2-hydroxypropyl)-1H- imidazol-3-ium)propane bromide (12). Their identification was based on IR, 1H-, 13C-NMR, DEPT, COSY and mass spectral studies. Their surface active properties were also evaluated on the basis of surface tension and conductivity measurements.
Chemo-enzymatic synthesis and antimicrobial evaluation of alkyloxy propanol amine-based cationic ether lipids
Reddy,Rao,Karuna,Kumar,Murthy,Prasad
, p. 437 - 448 (2013/07/27)
The present study involved the synthesis and antimicrobial evaluation of alkyloxy propanol amine-based cationic lipids N,N-dimethyl-1-octadecylamino-3- alkyloxy-2-propanol (series A, 7a-e) and N-methyl-N,N-di-(2-hydroxy-3-alkyloxy-2 propyl) octadecylamine (series B, 9a-e) and their acetylated derivatives (8a-e and 10a-e). A simple three-step chemo-enzymatic approach was employed for the synthesis of 7a-e and 9a-e in 71-80 and 67-88 % yields, respectively. The first step involved the synthesis of a series of glycidyl ethers from a series of alcohols (C4, C8, C10, C12, C 14) which were opened in the second step with octadecylamine to obtain 1-octadecylamino-3-alkyloxy-2 propanol (5a-e) and N,N-di-(2-hydroxy-3- alkyloxypropyl) octadecylamine (6a-e). In the third step, alkyloxy propanolamines (5a-e, 6a-e) were quaternized using methyl iodide to yield quaternized ammonium salts. The quaternized ammonium salts were enzymatically acetylated using Candida antarctica lipase-B based immobilized enzyme Novozym 435 to obtain their acetylated derivatives. The quaternized salts as well as their acetylated derivatives were evaluated for antibacterial and antifungal properties. The title compounds were found to possess moderate to good antibacterial activities against all the studied bacterial strains namely, Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Klebsiella aerogenes compared to streptomycin and cetyl trimethyl ammonium bromide (CTAB). The title compounds exhibited relatively good antifungal activities against Candida albicans and no significant activities against other fungal strains namely, Saccharomyces cerevisiae, Rhizopus oryzae and Aspergillus niger when compared to amphotericin B and CTAB.
Physicochemical properties of novel phosphobetaine zwitterionic surfactants and mixed systems with an anionic surfactant
Nong, Lanping,Xiao, Chengliang,Zhong, Zhensheng
experimental part, p. 433 - 438 (2012/07/14)
A series of novel zwitterionic phosphobetaine (PPBT) surfactants were synthesized using long chain fatty alcohol, epichlorohydrin, dimethylamine and sodium dihydrogen phosphate as raw materials. The physicochemical properties of the phosphobetaine surfactants such as isoelectric point, foaming, surface tension, critical micelle concentration (CMC) and Krafft point were measured. Low CMC and surface tension values indicated the surface activities of the phosphobetaine surfactants were quite excellent. The CMC and surface tension values of PPBT/SDS mixed systems were determined. It was found both of CMC and surface tension values decreased compared with single surfactant system because of the association between dodecyl sulfate anions and cationic groups in phosphobetaine by electrostatic attraction. AOCS 2011.
