U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject term butanol Remove constraint Subject term: butanol Subject term composite polymers Remove constraint Subject term: composite polymers Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

37  Search Results

« Previous | 1 - 20 of 37 |
Number of results to display per page

Search Results

1. Transformation of highly ordered large pore silica mesophases (Fm3m, Im3m and p6mm) in a ternary triblock copolymer–butanol–water system

Author:
Freddy Kleitz; Leonid A. Solovyov; Gopinathan M. Anilkumar; Shin Hei Choi; Ryong Ryoo
Source:
Chemical communications 2004 v. no.13 pp. 1536-1537
ISSN:
1364-548X
Subject:
butanol; chemical reactions; composite polymers; silica
Abstract:
... Exceptional control of the phase behavior of highly ordered large pore mesostructured silica (with the choice of Fm3m, Im3m or p6mm symmetry) is achieved using a triblock copolymer (EO₁₀₆PO₇₀EO₁₀₆) and butanol at low acid concentrations. ...
DOI:
10.1039/b403903c

2. The effect of n-, s- and t-butanol on the micellization and gelation of Pluronic P123 in aqueous solution

Author:
Nágila M.P.S. Ricardo; Nadja M.P.S. Ricardo; Flávia de M.L.L. Costa; Chiraphon Chaibundit; Giuseppe Portale; Daniel Hermida-Merino; Stefano Burattini; Ian W. Hamley; Christopher A. Muryn; S. Keith Nixon; Stephen G. Yeates
Source:
Journal of colloid and interface science 2011 v.353 no.2 pp. 482-489
ISSN:
0021-9797
Subject:
X-radiation; butanol; chemical concentration; composite polymers; crystal structure; gelation; gels; heat; light scattering; micelles; modulus of elasticity; porosity; rheology; solutions; temperature; turbidity; water
Abstract:
... In dilute aqueous solution unimers of copolymer P123 (E₂₁P₆₇E₂₁) associate to form micelles, and in more concentrated solution micelles pack to form high-modulus gels. We are interested in the use of the system as a templating agent in the synthesis of mesoporous materials, and the possibility of determining gel structure, hence mesoporosity, by use of n-, s- or t-butanol. Dynamic light scattering ...
DOI:
10.1016/j.jcis.2010.09.061
PubMed:
20971473

3. Polyion–Surfactant Ion Complex Salts Formed by a Random Anionic Copolyacid at Different Molar Ratios of Cationic Surfactant: Phase Behavior with Water and n-Alcohols

Author:
Percebom Ana Maria; Piculell Lennart; Loh Watson
Source:
Journal of physical chemistry 2012 v.116 no.8 pp. 2376-2384
ISSN:
1520-5207
Subject:
X-radiation; butanol; cationic surfactants; composite polymers; hydrophilicity; hydrophobicity; nuclear magnetic resonance spectroscopy; physical chemistry; salts; styrene; titration; viscosity
Abstract:
... The presence of acid groups with different pKₐ values in the anionic copolymer poly(4-styrene sulfonic acid-co-maleic acid), P(SS-Ma), allowed the preparation of complex salts with a variable fraction of anionic groups neutralized by cationic surfactant in the copolymer via controlled titration with hexadecyltrimethylammonium hydroxide, C₁₆TAOH. Two new complex salts were selected for detailed pha ...
DOI:
10.1021/jp2103403

4. Shear and dilational interfacial rheology of surfactant-stabilized droplets

Author:
Kendra A. Erk; Jeffrey D. Martin; Jonathan T. Schwalbe; Frederick R. Phelan Jr.; Steven D. Hudson
Source:
Journal of colloid and interface science 2012 v.377 no.1 pp. 442-449
ISSN:
0021-9797
Subject:
butanol; composite polymers; droplets; emulsions; image analysis; microscopy; oils; rheological properties; rheology; surfactants
Abstract:
... A new measurement method is suggested that is capable of probing the shear and dilational interfacial rheological responses of small droplets, those of size comparable to real emulsion applications. Freely suspended aqueous droplets containing surfactant and non-surface-active tracer particles are transported through a rectangular microchannel by the plane Poiseuille flow of the continuous oil pha ...
DOI:
10.1016/j.jcis.2012.03.078

5. Separation of diluted butanol–water solutions via vapor phase by organophilic membranes based on high permeable polyacetylenes

Author:
A.V. Yakovlev; M.G. Shalygin; S.M. Matson; V.S. Khotimskiy; V.V. Teplyakov
Source:
Journal of membrane science 2013 v.434 no. pp. 99-105
ISSN:
0376-7388
Subject:
activation energy; artificial membranes; biofuels; biomass; butanol; composite polymers; fermentation; fouling; membrane permeability; pervaporation; phase transition; polyacetylenes; temperature; vapors
Abstract:
... The diluted organic-water solutions are convenient products of biomass treatment to biofuels (e.g., ABE fermentation). A continuous membrane-assisted method by example of butanol recovery from fermentation media is considered in present work. The method is based on combination of the gas stripping (convenient process) with membrane vapor separation (with preferable butanol vapor permeability). In ...
DOI:
10.1016/j.memsci.2013.01.061

6. Solvent-Dependent Switch of Helical Main-Chain Chirality in Sergeants-and-Soldiers-Type Poly(quinoxaline-2,3-diyl)s: Effect of the Position and Structures of the “Sergeant” Chiral Units on the Screw-Sense Induction

Author:
Nagata Yuuya; Yamada Tetsuya; Adachi Takumi; Akai Yuto; Yamamoto Takeshi; Suginome Michinori
Source:
Journal of the American Chemical Society 2013 v.135 no.27 pp. 10104-10113
ISSN:
1520-5126
Subject:
butanol; chloroform; composite polymers; ethylene dichloride; methylene chloride; polymerization; pyridines; solvents; stereoisomerism; toluene; trimethylamine
Abstract:
... Poly(quinoxaline-2,3-diyl) copolymers bearing various “sergeant” chiral units with common “soldier” achiral units have been synthesized to investigate the efficiency of screw-sense induction and its dependence on the nature of the solvents. Optically active 2-alkoxymethyl side chains located at the 6- and 7-positions of the quinoxaline ring induced a single-handed helical conformation more efficie ...
DOI:
10.1021/ja403391m

7. Butanol solubilization in aqueous F127 solution: Investigating the enhanced micellar solvation and consequent improvement in gelation characteristics

Author:
P. Parekh; J. Dey; S. Kumar; S. Nath; R. Ganguly; V.K. Aswal; P. Bahadur
Source:
Colloids and Surfaces B: Biointerfaces 2014 v.114 pp. 386-391
ISSN:
0927-7765
Subject:
butanol; colloids; composite polymers; drugs; fluorescence; gelation; gels; nonionic surfactants; porosity; porous media; solubilization; viscosity
Abstract:
... Pluronics® are an important class of non-ionic surfactants because of their rich phase behavior and numerous industrial and biomedical applications. F127, an FDA approved Pluronic® is the most prominent member amongst them owing to its potential uses as vehicle for drug delivery and template for the fabrication of mesoporous materials. A cubic micellar gel formed by this copolymer above 15wt% conc ...
DOI:
10.1016/j.colsurfb.2013.10.030

8. Preparation and properties of UV-absorbent lignin graft copolymer films from lignocellulosic butanol residue

Author:
Xiaohuan Liu; Jifu Wang; Shouhai Li; Xiaowei Zhuang; Yuzhi Xu; Chunpeng Wang; Fuxiang Chu
Source:
Industrial crops and products 2014 v.52 pp. 633-641
ISSN:
0926-6690
Subject:
absorption; biological resistance; butanol; chemical structure; composite polymers; lignin; lignocellulose; mechanical properties; nuclear magnetic resonance spectroscopy; polymerization; transmittance; ultraviolet radiation
Abstract:
... The aim of this study was to develop economically UV-absorbent and visible-transparent films. For this purpose, lignin was selected because of its strong ultraviolet (UV) absorbing property. Lignocellulosic butanol residue, as the by-product of lignocellulosic butanol production, is rich in biobutanol lignin (BBL). Herein, BBL was modified with acryloyl chloride and then copolymerized with n-butyl ...
DOI:
10.1016/j.indcrop.2013.11.036

9. Rapid analysis of water- and fat-soluble vitamins by electrokinetic chromatography with polymeric micelle as pseudostationary phase

Author:
Xinjiong Ni; Xiaoping Xing; Yuhua Cao; Guangqun Cao
Source:
Journal of chromatography 2014 v.1370 pp. 263-269
ISSN:
0021-9673
Subject:
acetonitrile; butanol; chromatography; composite polymers; fat soluble vitamins; micelles; microstructure; pH; rapid methods; solvents
Abstract:
... A novel polymeric micelle, formed by random copolymer poly (stearyl methacrylate-co-methacrylic acid) (P(SMA-co-MAA)) has been used as pseudostationary phase (PSP) in electrokinetic chromatography (EKC) for simultaneous and rapid determination of 11 kinds of water- and fat-soluble vitamins in this work. The running buffer consisting of 1% (w/v) P(SMA-co-MAA), 10% (v/v) 1-butanol, 20% (v/v) acetoni ...
DOI:
10.1016/j.chroma.2014.10.047

10. Solvent Effects on Kinetics of 2-Hydroxyethyl Methacrylate Semibatch Radical Copolymerization

Author:
Liang Kun; Rooney Thomas R.; Hutchinson Robin A.
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.18 pp. 7296-7304
ISSN:
1520-5045
Subject:
butanol; composite polymers; copolymerization; engineering; gel chromatography; hydrogen bonding; molecular weight; nuclear magnetic resonance spectroscopy; solvents; styrene; temperature; xylene
Abstract:
... Radical copolymerizations of 2-hydroxyethyl methacrylate (HEMA) with n-butyl methacrylate (BMA) and n-butyl acrylate (BA) were carried out in xylene, DMF, and n-butanol solutions. Solvent effects on copolymerization propagation kinetics were investigated using pulsed laser polymerization (PLP) combined with size exclusion chromatography (SEC) as well as proton NMR, while starved-feed higher temper ...
DOI:
10.1021/ie4027549

11. Synthesis, Characterization, and Epoxidation Activity of Tungsten-Incorporated SBA-16 (W-SBA-16)

Author:
Maheswari Rajamanickam; Pachamuthu Muthusamy P.; Ramanathan Anand; Subramaniam Bala
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.49 pp. 18833-18839
ISSN:
1520-5045
Subject:
X-radiation; X-ray diffraction; acidity; ammonia; butanol; catalysts; catalytic activity; composite polymers; cyclohexenes; desorption; engineering; epoxidation reactions; hydrogen; hydrogen peroxide; leaching; nitrogen; oxidants; silicon; sodium; texture; transmission electron microscopy; tungsten oxide
Abstract:
... Tungsten, in varying amounts, was incorporated into a SBA-16 structure via a one-pot direct synthesis method under an acidic medium using Pluronic F127 triblock co-polymer as a template and n-butanol as a co-surfactant. Tetraethyl orthosilicate (TEOS) and sodium tungstate were used as the Si and W sources, respectively. The resulting materials (denoted as W-SBA-16) are characterized for structural ...
DOI:
10.1021/ie501784c

12. The Development of Novel Nexar Block Copolymer/Ultem Composite Membranes for C2–C4 Alcohols Dehydration via Pervaporation

Author:
Zuo Jian; Shi Gui Min; Wei Shawn; Chung Tai-Shung
Source:
ACS Applied Materials & Interfaces 2014 v.6 no.16 pp. 13874-13883
ISSN:
1944-8252
Subject:
asymmetric membranes; atomic force microscopy; butanol; coatings; composite polymers; electrons; engineering; ethanol; hexane; hydrophilicity; ion exchange; isopropyl alcohol; nanomaterials; pervaporation; solvents; spectroscopy
Abstract:
... Novel composite membranes comprising sulfonated styrenic Nexar pentablock copolymers were developed by dip-coating on poly(ether imide) hollow fibers for pervaporation dehydration of C2–C4 alcohols. The advantages of using block copolymers as the selective layer are (1) their effectiveness to synergize the physicochemical properties of different chemical and structural moieties and (2) tunable nan ...
DOI:
10.1021/am503277t

13. The templating effect of an easily available cationic polymer with widely separated charge centers on the synthesis of a hierarchical ZSM-5 zeolite

Author:
Yicheng Zhang; Kake Zhu; Xuezhi Duan; Xinggui Zhou; Weikang Yuan
Source:
Journal of materials chemistry A 2014 v.2 no.43 pp. 18666-18676
ISSN:
2050-7496
Subject:
benzaldehyde; butanol; catalytic activity; composite polymers; condensation reactions; cyclohexanones; methanol; nanocrystallites; polyamines; quaternary ammonium compounds; zeolites
Abstract:
... The epichlorohydrin-N,N-dimethyl-1,3-diaminopropane copolymer (PCA) has been introduced for the first time as a meso-template to successfully synthesize a hierarchical ZSM-5 zeolite (PCA-ZSM-5) with mesopores of 7–50 nm in diameter by using small-sized nanoblocks. However, when its structural analogue epichlorohydrin–dimethylamine polyamine (PCS) is used, the obtained ZSM-5 zeolite (PCS-ZSM-5) has ...
DOI:
10.1039/c4ta02325k

14. Block copolymer pervaporation membrane for in situ product removal during acetone–butanol–ethanol fermentation

Author:
Chaeyoung Shin; Zachary C. Baer; X. Chelsea Chen; A. Evren Ozcam; Douglas S. Clark; Nitash P. Balsara
Source:
Journal of membrane science 2015 v.484 pp. 57-63
ISSN:
0376-7388
Subject:
Clostridium acetobutylicum; aqueous solutions; artificial membranes; batch fermentation; biofuels; butanol; commercialization; composite polymers; crosslinking; fermenters; pervaporation; polydimethylsiloxane
Abstract:
... We address two major challenges facing commercialization of acetone–butanol–ethanol (ABE) fermentation: product inhibition and low productivity. We studied a polystyrene-b-polydimethylsiloxane-b-polystyrene (SDS) triblock copolymer membrane for selective removal of butanol from aqueous solutions by pervaporation. The SDS membrane exhibited higher permeabilities than a commercially available cross- ...
DOI:
10.1016/j.memsci.2015.03.005

15. Impact of Nanostructure on Mechanical Properties of Norbornene-based Block Copolymers under Simulated Operating Conditions for Biobutanol Membranes

Author:
Ye Changhuai; Takigawa Tamami; Burtovvy Oleksandr (Sasha); Langsdorf Leah; Jablonski Dane; Bell Andrew; Vogt Bryan D.
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.22 pp. 11765-11774
ISSN:
1944-8252
Subject:
X-radiation; annealing; atomic force microscopy; butanol; composite polymers; cracking; cylinders; mechanical stress; modulus of elasticity; modulus of rupture; nanomaterials; solubility; solvents
Abstract:
... The structure and mechanical properties of a novel block copolymer (BCP) system with Tg’s for both segments exceeding 300 °C, poly(butylnorbornene)-block-poly(hydroxyhexafluoroisopropyl norbornene) (BuNB-b-HFANB), are investigated as a function of processing conditions used for solvent vapor annealing (SVA). Solvent selection impacts long-range order markedly, but unexpectedly vertical orientation ...
DOI:
10.1021/acsami.5b02692

16. Ordered mesoporous crystalline aluminas from self-assembly of ABC triblock terpolymer–butanol–alumina sols

Author:
Kwan Wee Tan; Hiroaki Sai; Spencer W. Robbins; Jörg G. Werner; Tobias N. Hoheisel; Sarah A. Hesse; Peter A. Beaucage; Francis J. DiSalvo; Sol M. Gruner; Martin Murtagh; Ulrich Wiesner
Source:
RSC advances 2015 v.5 no.61 pp. 49287-49294
ISSN:
2046-2069
Subject:
air; aluminum; aluminum oxide; annealing; butanol; carbon; catalytic activity; ceramics; composite polymers; heat treatment; isoprene; nitrogen; porous media; solvents; synthesis; temperature; thermal stability
Abstract:
... A one-pot synthesis approach is described to generate ordered mesoporous crystalline γ-alumina–carbon composites and ordered mesoporous crystalline γ-alumina materials via the combination of soft and hard-templating chemistries using block copolymers as soft structure-directing agents. Periodically ordered alumina hybrid mesostructures were generated by self-assembly of a poly(isoprene)-block-poly ...
DOI:
10.1039/c5ra07421e

17. Preparation and characterization of Lignin-graft-poly (ɛ-caprolactone) copolymers based on lignocellulosic butanol residue

Author:
Xiaohuan Liu; Enmin Zong; Jinhua Jiang; Shenyuan Fu; Jifu Wang; Binbin Xu; Wenhuan Li; Xianzhi Lin; Yuzhi Xu; Chunpeng Wang; Fuxiang Chu
Source:
International journal of biological macromolecules 2015 v.81 pp. 521-529
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; absorption; atomic force microscopy; butanol; chemical composition; coatings; composite polymers; contact angle; differential scanning calorimetry; lignin; lignocellulose; molecular weight; nuclear magnetic resonance spectroscopy; polymerization; raw materials; thermal stability; thermogravimetry; toluene
Abstract:
... In this paper, a “graft from” Ring-Opening Polymerization (ROP) technique was used to synthesize a lignin-graft-poly (ɛ-caprolactone) copolymer (BBL-g-PCL) using biobutanol lignin (BBL) as raw material recovered from lignocellulosic butanol residue. Polymerizations were carried out with various mass ratios of BBL and CL monomer ([BBL]/([BBL]+[CL])=1.0%, 5.0%, 10%, 20% and 40% (w/w)) to obtain BBL- ...
DOI:
10.1016/j.ijbiomac.2015.08.046

18. Combination of lignin and l-lactide towards grafted copolymers from lignocellulosic butanol residue

Author:
Enmin Zong; Jinhua jiang; Xiaohuan Liu; Shenyuan Fu; Yuzhi Xu; Fuxiang Chu
Source:
International journal of biological macromolecules 2016 v.86 pp. 80-88
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; absorption; butanol; catalysts; chemical structure; composite polymers; lignin; lignocellulose; molecular weight; nuclear magnetic resonance spectroscopy; polymerization; thermal properties
Abstract:
... A series of BBL-graft-poly (l-lactide) copolymers were synthesized via ring-opening polymerization (ROP) of l-lactide (l-LA) with a biobutanol lignin (BBL) initiator and a triazabicyclodecene (TBD) catalyst under free-solvent at 135°C. By manipulating the mass ratio of BBL/LLA, BBL-g-PLLA copolymers with tunable number⿿average molecular weight (Mn) (2544⿿7033gmol⿿1) were obtained. The chemical str ...
DOI:
10.1016/j.ijbiomac.2016.01.043

19. Fabrication of nanofiber stationary phases from chopped polyacrylonitrile co-polymer microfibers for use in ultrathin layer chromatography of amino acids

Author:
A. Moheman; M. Sarwar Alam; A. Gupta; S. R. Dhakate; A. Kumar; A. Mohammad
Source:
RSC advances 2016 v.6 no.93 pp. 90100-90110
ISSN:
2046-2069
Subject:
butanol; composite polymers; dimethylformamide; drugs; ethyl acetate; ethylene glycol; ion exchange resins; lysine; methionine; migratory behavior; monitoring; nanofibers; polyacrylonitrile; scanning electron microscopy; silica gel; solvents; thin layer chromatography
Abstract:
... Electrospun polyacrylonitrile (PAN) copolymer nanofiber based ultrathin layer chromatographic (UTLC) plates fabricated by a facile electrospinning method have been used as the stationary phase for on-plate identification and monitoring of the migration behavior of twenty amino acids using green solvents like n-butanol, ethylene glycol, ethyl acetate and their mixtures as the mobile phase. The PAN ...
DOI:
10.1039/c6ra15465d

20. Multiblock Copolymer Grafting for Butanol Biofuel Recovery by a Sustainable Membrane Process

Author:
Vijay Kumar Shankarayya; Arnal-Herault Carole; Wang Miao; Babin Jérôme; Jonquieres Anne
Source:
ACS Applied Materials & Interfaces 2016 v.8 no.25 pp. 16262-16272
ISSN:
1944-8252
Subject:
alkynes; aqueous solutions; biofuels; butanol; composite polymers; culture media; fermentation; microorganisms; models; permeability; pervaporation; sustainable technology; toxicity
Abstract:
... Biobutanol is an attractive renewable biofuel mainly obtained by the acetone–butanol–ethanol (ABE) fermentation process. Nevertheless, the alcohol concentration has to be limited to a maximum of 2 wt % in ABE fermentation broths to avoid butanol toxicity to the microorganisms. The pervaporation (PV) membrane process is a key sustainable technology for butanol recovery in these challenging conditio ...
DOI:
10.1021/acsami.6b01900