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RISS 인기검색어
- 검색키워드
- 저자 : Hemmatinejad, (검색결과 5 건)
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Sorbent Textiles for Colored Wastewater Made from Orange Based Pectin Nano-hydrogel
Sepideh Shakibi,Nahid Hemmatinejad,Azadeh Bashari 한국섬유공학회 2020 Fibers and polymers Vol.21 No.6
In this article, the synthesis of pectin nano hydrogel, it’s having high absorption ability and its related applicationsin the treatment of colored wastewater have been investigated. Pectin has been extracted from orange peel as a good source ofpectin and the degree of esterification (DE) of pectin as a main parameter on the gel formation were determined. Pectin nanohydrogel was synthesized using Calcium Chloride as a cross-linking agent. The nanometer size and dye adsorption ability ofhydrogel particles from colored wastewater have been confirmed by the SEM and UV-Vis spectroscopy methods,respectively. At the next step, the dye adsorption ability of the treated polyester fabrics with pectin nano hydrogel wasassessed and results indicated the high adsorption capacity of synthesized nano hydrogel. More specifically thespectrophotometry method indicated that treated polyester fabrics with chitosan and pectin nano hydrogel showed more dyeabsorption in compare to pectin and cationic surface agent treated fabrics.
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Synthesis of Redox-Light Responsive Alginate Nano Hydrogel to Produce Smart Textile
Niloofar Salamatipour,Nahid Hemmatinejad,Azadeh Bashari 한국섬유공학회 2019 Fibers and polymers Vol.20 No.4
Nowadays, with improvements in technology, smart materials have gained much attention. The objective of thepresent study is to prepare light-reduction/oxidation responsive alginate nano hydrogels and finishing cotton fabric by thesesmart hydrogels to produce smart textile. Alginate nano hydrogels were prepared by the reverse emulsification-diffusionmethod in a water in oil system by using alginate solution as a model polymer and water phase, normal hexane as an oilphase, span 80 as a lipophilic surfactant, Iron (ІІ)-chloride as a cross-linker and light-redox sensitive agent and sodium lactateas a reducing agent. Alginate nano hydrogels were characterized by fourier transform infrared (FTIR), scanning electronmicroscopy (SEM) methods and the synthesis of alginate nano hydrogels was confirmed. In the next step, cotton fabrics werefinished by these smart hydrogels. Scanning electron microscopy and FTIR test confirmed the presence of alginate nanohydrogels on the fabric. Water retention capacity (WRC) and antibacterial properties were evaluated and the results exhibitedthe improvement of WRC and antibacterial activity against gram-positive and gram-negative bacteria. These kinds ofalginate nano hydrogels made the fabric responsive to light stimuli. In order to evaluate this responsivity, a drug model (folicacid) was loaded in the structure of nano hydrogels by sonification, the rate of release by radiation of ultraviolet light wasstudied by spectroscopy, and the results proved the light responsivity of these nano hydrogels.
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N. Khomarloo,F. Mousazadegan,M. Latifi,N. Hemmatinejad 한국섬유공학회 2019 Fibers and polymers Vol.20 No.3
Surgical gowns are a vital part of the protective textile that are applied to preserve surgical group members againstinfection. Therefore, not only their protective performance, but also their comfort are significant. Reusable gowns usually preferred by people due to their comfort. However; their stability to the laundry and sterilization process determine their useful life-time. In this study, the protective performance of two single-layer and three-layer reusable surgical gowns was investigated after 70 laundry and sterilization cycles. To this end, fabric’s resistance against bacterial penetration in wet state after every 10 laundry and sterilization cycles were evaluated based on the ISO22610 standard test method. Moreover, to assess the fabric structure variation, SEM image was provided after every 10 laundry and sterilization cycles. The results illustrate that laundry and sterilization process lead to the destruction of the single-layer gown’s structure and enhance its pore size, followed by barrier index reduction. However; no considerable variation was obtained in the three-layer gown’s barrier index.
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Divsalar, A.,Saboury, A.A.,Mansoori-Torshizi, H.,Hemmatinejad, B. Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.11
The interaction between whey carrier protein $\beta$-lactoglobulin type A and B (BLG-A and -B) and 2,2'-bipyridin n-hexyl dithiocarbamato Pd(II) nitrate (BPHDC-Pd(II)), a new heavy metal complex designed for anticancer property, was investigated by fluorescence spectroscopy combined with chemometry and circular dichroism (CD) techniques. A strong fluorescence quenching reaction of BPHDC-Pd(II) to BLG-A and -B was observed. Hence, BPHDC-Pd(II) complex can be bound to both BLG-A and -B, and quench the fluorescence spectra of the proteins. The quenching constant was determined using the modified Stern-Volmer equation. The binding parameters were evaluated by fluorescence quenching method. The results of binding study provided evidences presence of two and three sets of binding sites on the BLG-B and -A, respectively, for BPHDC-Pd(II) complex. Using fluorescence spectroscopy and chemometry, the ability of BLG-A and -B to form an intermediate upon interaction with BPHDC-Pd(II) complex was assessed. CD studies displayed that under influence of different concentrations of BPHDC-Pd(II) complex, the regular secondary structure of BLG-B had no significant changes, whereas for BLG-A a transition from $\alpha$-helix to $\beta$-structure was appeared. The results for both of BLG-A and -B displayed that BPHDC-Pd(II) complex can induce a conformational transition from the native form to an intermediate state with a slightly opened conformation, which is detectable with chemometry analyses.
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A. Divsalar,A. A. Saboury*,H. Mansoori-Torshizi,B. Hemmatinejad 대한화학회 2006 Bulletin of the Korean Chemical Society Vol.27 No.11
The interaction between whey carrier protein b-lactoglobulin type A and B (BLG-A and -B) and 2,2'-bipyridin n-hexyl dithiocarbamato Pd(II) nitrate (BPHDC-Pd(II)), a new heavy metal complex designed for anticancer property, was investigated by fluorescence spectroscopy combined with chemometry and circular dichroism (CD) techniques. A strong fluorescence quenching reaction of BPHDC-Pd(II) to BLG-A and -B was observed. Hence, BPHDC-Pd(II) complex can be bound to both BLG-A and -B, and quench the fluorescence spectra of the proteins. The quenching constant was determined using the modified Stern-Volmer equation. The binding parameters were evaluated by fluorescence quenching method. The results of binding study provided evidences presence of two and three sets of binding sites on the BLG-B and -A, respectively, for BPHDC-Pd(II) complex. Using fluorescence spectroscopy and chemometry, the ability of BLG-A and -B to form an intermediate upon interaction with BPHDC-Pd(II) complex was assessed. CD studies displayed that under influence of different concentrations of BPHDC-Pd(II) complex, the regular secondary structure of BLG-B had no significant changes, whereas for BLG-A a transition from a-helix to b-structure was appeared. The results for both of BLG-A and -B displayed that BPHDC-Pd(II) complex can induce a conformational transition from the native form to an intermediate state with a slightly opened conformation, which is detectable with chemometry analyses.
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