A. Waly, N. Y. Abou-Zeid, M. M. Marie, M. A. El-Sheikh and A. L. Mohamed
Reactive amine-amide derivatives are prepared via the addition reaction of different primary and secondary amines on acrylamide (AAm) using equivalent molar ratios and the…
Abstract
Reactive amine-amide derivatives are prepared via the addition reaction of different primary and secondary amines on acrylamide (AAm) using equivalent molar ratios and the resultant product is methylolated using equivalent amounts of HCHO. Bis (hydroxymethyl carbamoylethyl) ethylamine (I), tetra (hydroxymethyl carbamoyl ethyl) ethylene diamine (II) and penta (hydroxymethyl carbamoylethyl) diethylenetriamine (III) are prepared by reaction between ethylamine or ethylenediamine or diethylenetriamine and AAm. N-Hydroxydiethyl-phosphonopropianamide (IV) is prepared via Mecheal addition reaction of diethylphosphite with AAm followed by reaction with HCHO. To impact flame-retardancy and easy care finishing to cotton fabric aqueous formulations of compound IV, etherified methylolated melamine (EMM) and/or compounds III, II or I have been prepared. Cotton fabric treated by pad–dry–cure system, the drying time was investigated. Cured cotton fabrics are fire retardant if the aqueous formulation contains 12 % w/w of compound IV and 6 % w/w of EMM respectively. Physical and mechanical properties are less deteriorated when compound III, II or I are used instead of EMM and the liberated HCHO is almost decreased to one half by replacing EMM by one of the prepared methylol compounds. Treatments with compounds III, II or I is impart antibacterial and antifungus properties to the finished fabric.
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A. Waly, M.M. Marie, N.Y. Abou-Zeid, M.A. El-Sheikh and A.L. Mohamed
Cotton fabrics can be dyed with reactive and/or direct dyes in aqueous baths under certain specific conditions of pH, salt, temperature, time, etc., and rendered fire retardant…
Abstract
Cotton fabrics can be dyed with reactive and/or direct dyes in aqueous baths under certain specific conditions of pH, salt, temperature, time, etc., and rendered fire retardant through reaction with reactive phosphonopropionamide compounds. In the presence of reactive tertiary amines and reactive phosphorous derivatives, cotton fabrics can be dyed with reactive, direct or acid dyes in the absence of the usual added alkalis and salts, and in the mean time, the fabric becomes fire retardant with wash and wear properties. To verify such claims, reactive aminating agents are synthesized by reacting different amine compounds that have various numbers of amino groups with acryl amide and formaldehyde. The pad-dry-cure technique is applied to treated fabrics with aqueous finishing formulations that contain dyestuff and reactive amine-compounds; the cotton fabric will simultaneously impart reactive dyeing, easy-care inishing and fire-retardant properties. Systematic studies show that in the presence of 6% weight/weight, reactive amine in an aqueous formulation yields cotton fabric with the least loss in tensile strength and elongation at break, and an enhancement to the crease recovery angle. By adding the dyestuff to the aqueous formulation at fixed nitrogen content for treated cotton (0.2%) under identical dyeing conditions, the colour strength (K/S) increases for dyed cotton. The fastness properties of the dyed fabric are improved or remain unaltered for the three types of dyestuffs used
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The behaviour of chemically modified cellulose towards dyeing is an interesting subject. Cellulose undergoes substantial changes in its chemical and physical properties by…
Abstract
The behaviour of chemically modified cellulose towards dyeing is an interesting subject. Cellulose undergoes substantial changes in its chemical and physical properties by chemical modification. Some investigations were carried out to study the effect of these changes on dyeing and dyeing properties of cellulose. Previous reports have disclosed that the dyeability of chemically modified cellulose differs significantly when compared with the unmodified cellulose. Among the modified cellulose studied were partially acetylated cellulose, cyanoethylated cellulose, carboxymethylated cellulose, cellulose tiaocarbonate and cellulose copolymerized with various vinyl monomers.
Wood as a structural material has one feature which is unique among all structural materials; it is a crop which can be formed, whereas its competitors such as stone, brick, metal…
Abstract
Wood as a structural material has one feature which is unique among all structural materials; it is a crop which can be formed, whereas its competitors such as stone, brick, metal and plastic are all derived from exhaustible mineral sources.
Maya Abou-Zeid and Moshe Ben-Akiva
In previous research (Abou-Zeid et al., 2008), we postulated that people report different levels of travel happiness under routine and nonroutine conditions and supported this…
Abstract
In previous research (Abou-Zeid et al., 2008), we postulated that people report different levels of travel happiness under routine and nonroutine conditions and supported this hypothesis through an experiment requiring habitual car drivers to switch temporarily to public transportation. This chapter develops a general modeling framework that extends random utility models by using happiness measures as indicators of utility in addition to the standard choice indicators, and applies the framework to modeling happiness and travel mode switching using the data collected in the experiment. The model consists of structural equations for pretreatment (remembered) and posttreatment (decision) utilities and explicitly represents their correlations, and measurement equations expressing the choice and the pretreatment and posttreatment happiness measures as a function of the corresponding utilities. The results of the empirical model are preliminary but support the premise that the extended modeling framework, which includes happiness, will potentially enhance behavioral models based on random utility theory by making them more efficient.
Fatma A. Mohamed, Saadia A. Abd El-Megied, Mahmoud S. Bashandy and Hassan M. Ibrahim
This study aims to synthesise and characterise new reactive dyes based on thiazole derivatives which act as chromophoric moieties. These dyes were applied to cotton fabric…
Abstract
Purpose
This study aims to synthesise and characterise new reactive dyes based on thiazole derivatives which act as chromophoric moieties. These dyes were applied to cotton fabric, resulting in the dyed fabrics exhibiting good colour strength, light fastness and other fastness properties. The antibacterial activity of the dyed cotton fabric was evaluated against gram-negative and gram-positive bacteria.
Design/methodology/approach
The dyes were synthesised in two steps. First, the coupling compound was formed by adding H-acid solution to cyanuric chloride in an ice bath at pH 5 then adding 4-aminobenzenesulphonic acid portion-wise at room temperature and at pH 6-7. Second, different diazonium salts 4-phenylthiazol-2-amine (2a) and 4-(4-methoxyphenyl) thiazol-2-amine (2b) were coupled with the coupling compound at pH 5. The resultant monochlorotriazine (MCT)-reactive dyes (6a, 6b) were formed. The synthesised dyes were applied onto cotton fabric under typical exhaust dyeing conditions and their dyeing properties were investigated.
Findings
High antimicrobial activity, dye exhaustion and fixation yield on cotton fabric were recorded for each dye. All dyes showed high stability against washing, rubbing, perspiration and light fastness.
Research limitations/implications
Dyeing of cotton fabric with these dyes which have higher fastness, higher exhaustion and higher antibacterial activity is considered one of the most important reactive dyes species.
Practical implications
The preparation procedure showed the synthesis of the novel MCT-reactive dyes derived from thiazole derivatives followed by the application of these dyes on cotton fabrics.
Social implications
Use of reactive dyes will bring a number of benefits to society including higher fastness and higher antibacterial activity so, and these dyes can be used for dyeing cotton.
Originality/value
In this work, the new reactive dyes derived from thiazole derivatives were synthesised and their structures were confirmed by the analytical and spectral data. Such compounds are considered to be excellent reactive dyes with different colour shades and higher antibacterial activity.
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S.A. Abdel‐Hafiz, F.F. El‐Sisi, M. Helmy and A. Hebeish
Samples of loomstate cotton fabric were first treated with aqueous potassium permanganate solution at different concentrations in the presence of a non‐ionic wetting agent. The…
Abstract
Samples of loomstate cotton fabric were first treated with aqueous potassium permanganate solution at different concentrations in the presence of a non‐ionic wetting agent. The samples were then washed and treated using solutions containing methacrylic acid, wetting agent and acid or basic dye along with citric acid of different concentrations at different temperatures for different times. The critical properties of the fabric such as graft yield (expressed as carboxyl content m.eq/100g cellulose), colour strength before and after soaping and percentage loss in colour strength due to soaping were found to depend on the concentrations of KMnO4, citric acid and methacrylic acid as well as duration of the treatment. Based on the results obtained, treating formulations consisting of KMnO4 (0.1g/l), citric acid (0.1g/l), methacrylic acid (50 per cent), dye (1 per cent) and wetting agent (2g/l) was considered appropriate for concurrent grafting and dyeing of the said fabrics provided that the treatment was carried out at 90°C for 60 minutes.
Sanaa M. El‐Sawy, Yosreya M. Abu‐Ayana and Fikry A. Abdel‐Mohdy
Chitin was extracted from locally collected shrimp shells. Chitosan was produced by alkali deacetylation of chitin. Poly(DEAEMA)‐chitosan‐graft‐copolymer…
Abstract
Chitin was extracted from locally collected shrimp shells. Chitosan was produced by alkali deacetylation of chitin. Poly(DEAEMA)‐chitosan‐graft‐copolymer, poly(COOH)‐chitosan‐graft‐copolymer, poly(V‐OH)‐chitosan‐graft‐copolymer, and carboxymethyl‐chitosan were prepared. The extent of the preparation reactions was expressed as nitrogen content, carboxylic content and graft yield. The ability of the prepared compounds to adsorb heavy metals ions and some dyestuffs was studied. The prepared compounds were also tested for corrosion protection when applied in some organic coatings for steel panels. Promising results to use the prepared compounds for corrosion protection and wastewater treatment from heavy metal ions and dyestuffs were obtained.
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Purpose: This chapter introduces a choice modeling framework that explicitly represents the planning and action stages of the choice process.Methodology: A discussion of evidence…
Abstract
Purpose: This chapter introduces a choice modeling framework that explicitly represents the planning and action stages of the choice process.
Methodology: A discussion of evidence from behavioral research is followed by the development of a discrete choice modeling framework with explicit planning and action submodels. The plan/action choice model is formulated for both static and dynamic contexts; where the latter is based on the Hidden Markov Model. Plans are often unobservable and are treated as latent variables in model estimation using observed actions.
Implications: By modeling the interactions between the planning and action stages, we are able to incorporate richer specifications in choice models with better predictive and policy analysis capabilities. The applications of this research in areas such as driving behavior, route choice, and mode choice demonstrate the advantages of the plan/action model in comparison to a “black box” choice model in terms of improved microsimulations of behaviors that better represent real-life situations. As such, the outcomes of this chapter are relevant to researchers and policy analysts.