Preparing Process and Properties of Collagen Modified Cotton Fiber

2011 ◽  
Vol 236-238 ◽  
pp. 1415-1419 ◽  
Author(s):  
Yun Hui Xu ◽  
Zhao Fang Du
Keyword(s):  
Cotton Fiber ◽  
Treatment Time ◽  
Ph Value ◽  
Periodate Oxidation ◽  
Aqueous Acetic Acid ◽  
Collagen Concentration ◽  
Acid Media ◽  
Xps Characterization ◽  
Aldehyde Groups

In order to develop cotton fabric underwear with the health care function, the cotton fiber was modified with the collagen (CMCF) using periodate oxidation method. The aldehyde groups on the glucose chains of the oxidized cotton cellulose were reacted with the amino groups of collagen to obtain the CMCF, and the oxidized cellulose was crosslinked with collagen in aqueous acetic acid media. The effects of collagen concentration, treatment time, reaction temperature, pH value of solution and periodate concentration on the amount of collagen crosslinked on cotton fiber were respectively discussed, and the optimal reaction technology was obtained. XPS characterization of the modified cotton fiber showed a characteristic peak about 400.0–405.0 eV corresponding to collagen, which indicated that the collagen was combined on the surface of cotton fiber. The mechanical properties of the collagen modified cotton fiber were improved. The resulting CMCF is a new natural ecological fiber and has the extensive application as a carrier for the controlled release of drugs.

Crosslinking Properties on Oxidized Cotton Cellulose and Chitosan with Low Molecular Weight

2011 ◽  
Vol 332-334 ◽  
pp. 100-103
Author(s):  
Yun Hui Xu ◽  
Yong Jin Deng
Keyword(s):  
Molecular Weight ◽  
Cotton Fiber ◽  
Sodium Periodate ◽  
Periodate Oxidation ◽  
Covalent Bond ◽  
Cotton Cellulose ◽  
Cotton Fibers ◽  
Low Molecular Weight ◽  
Aqueous Acetic Acid ◽  
Xps Spectra

For exploiting green ecological cotton fiber products with the multifunction, a new cotton fiber crosslinked with chitosan of low molecular weight (CCCF) was prepared through the sodium periodate oxidation method. The reaction between amino groups of chitosan and aldehyde groups in the oxidized cotton cellulose occurred to obtain the CCCF in aqueous acetic acid solutions. The aldehyde group content in oxidized cotton cellulose increased markedly with the sodium periodate concentration, and the maximum weight gain of chitosan introduced on cotton fiber was 11.63% of the weight of cotton fibers. Furthermore, the crosslinking properties were respectively investigated by measurements of FT-IR and XPS spectra, the analysis indicated that the chitosan molecule was crosslinked on the surface of cotton fiber by the C=N covalent bond. This resulting CCCF is a novel ecological fiber and has more abilities of potential modification, which suggested useful information in planning applications for these modified cotton fibers.

Preparation and Characterization of Dialdehyde Nanocellulose

2014 ◽  
Vol 988 ◽  
pp. 79-83 ◽  
Author(s):  
Wei Gong Li ◽  
Qing Hua Xu
Keyword(s):  
Ir Spectra ◽  
Crystallite Size ◽  
Sodium Periodate ◽  
Periodate Oxidation ◽  
Crystallinity Index ◽  
Aldehyde Group ◽  
Hydroxyl Group ◽  
Ft Ir ◽  
Aldehyde Groups

Dialdehyde nanocellulose (DANC) was prepared by periodate selective oxidation of secondary hydroxyl group of nanocrystalline cellulose (NCC). NCC and DANC samples were characterized by FT-IR, XRD and conductimetric titration. Aldehyde groups were introduced during the process of sodium periodate oxidation, which was confirmed by the FT-IR spectra. The aldehyde group content increased with the increase of sodium periodate. The crystallinity index (CrI) and crystallite size of the samples were continuously decreased with the increase of the oxidant.

Research on Finishing of Oxidized Cotton Fabric with Sericin

2011 ◽  
Vol 287-290 ◽  
pp. 2579-2582
Author(s):  
Yun Hui Xu ◽  
Xiao Li Zhang
Keyword(s):  
Cotton Fabric ◽  
Treatment Time ◽  
Periodate Oxidation ◽  
Subsequent Treatment ◽  
Amino Groups ◽  
Characteristic Peak ◽  
Schiff’S Base ◽  
Finishing Process ◽  
Recovery Angle ◽  
Aldehyde Groups

In order to take advantage of specific properties of sericin to develop cotton fabrics with the healthcare function, the cotton fabric modified with sericin (SMCF) was prepared by the periodate oxidation and subsequent treatment with sericin solution. The aldehyde groups in molecular chains of the oxidized cotton fabric crosslinked with the amino groups of sericin to form the chemical bond of Schiff’s base. The effects of periodate concentration, reaction temperature, sericin concentration and treatment time on the finishing process were investigated. The optimum finishing technology for cotton fabric was obtained. XPS analysis of the modified cotton fabric showed a characteristic peak of nitrogen element at 400.0–404.0 eV, which suggested that the sericin was fixed on the surface of cotton fabric through the Schiff’s base. The anti-ultraviolet property of the resulting SMCF improved. The breaking strength and whiteness of the modified fabric slightly decreased, whereas the moisture regain and wrinkle recovery angle of sericin treated fabric remarkably increased.

Cross-Linking Soybean Protein into Periodate Oxidized Cotton Fabrics and their Physical Properties

2013 ◽  
Vol 796 ◽  
pp. 385-389 ◽  
Author(s):  
Chen Huang ◽  
Yun Hui Xu ◽  
Jia Lin Chen
Keyword(s):  
Cotton Fabric ◽  
Protein Modification ◽  
Moisture Absorption ◽  
Soybean Protein ◽  
Periodate Oxidation ◽  
Cotton Fabrics ◽  
Subsequent Treatment ◽  
Aqueous Acetic Acid ◽  
Aldehyde Groups ◽  
Protein Treatment

The possibilities of obtaining active soybeancotton fabrics were examined. An effective two-stage method was developed. The first stage involves the formation of dialdehyde cellulose by the sodium periodate oxidation of cotton fabrics, which is able to form Schiff base with soybean protein. In the second stage, soybean grafted cotton fabrics were prepared by subsequent treatment of oxidized cotton fabrics with a solution of soybean protein in aqueous acetic acid. The technical conditions of oxidized cotton fabrics with soybean protein graft were studied, the internal structure and wearability of oxidized cotton fabric after soybean protein treatment were respectively measured and analyzed in this paper. The results of infrared spectra indicated that the C=N of chemical bond was formed between the aldehyde groups in oxidized cotton fabrics and the amino groups of soybean protein, and the soybean protein cross-linked on the surface of oxidized cotton fabrics by a series of reactions. Meanwhile, the calculating results on the separating peaks and imitating curves of X-ray diffractive curves illuminated that the crystallinity of the oxidized cotton fabric after soybean protein modification decreased from 67.83% to 62.35%. After soybean protein treatment, the breaking strength and elongation of the fabrics slightly decreased, whereas the wrinkle recovery angle and moisture absorption of cotton fabrics remarkably increased.

scholarly journals Microscopic Image Segmentation and Morphological Characterization of Novel Chitosan/Silica Nanoparticle/Nisin Films Using Antimicrobial Technique for Blueberry Preservation

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 303
Author(s):  
Rokayya Sami ◽  
Schahrazad Soltane ◽  
Mahmoud Helal
Keyword(s):  
Ph Value ◽  
Silica Nanoparticle ◽  
Morphological Characterization ◽  
Aerobic Bacteria ◽  
Nano Materials ◽  
Elongation At Break ◽  
Stable Suspension ◽  
Average Size ◽  
Material Ductility

In the current work, the characterization of novel chitosan/silica nanoparticle/nisin films with the addition of nisin as an antimicrobial technique for blueberry preservation during storage is investigated. Chitosan/Silica Nanoparticle/N (CH-SN-N) films presented a stable suspension as the surface loads (45.9 mV) and the distribution was considered broad (0.62). The result shows that the pH value was increased gradually with the addition of nisin to 4.12, while the turbidity was the highest at 0.39. The content of the insoluble matter and contact angle were the highest for the Chitosan/Silica Nanoparticle (CH-SN) film at 5.68%. The use of nano-materials in chitosan films decreased the material ductility, reduced the tensile strength and elongation-at-break of the membrane. The coated blueberries with Chitosan/Silica Nanoparticle/N films reported the lowest microbial contamination counts at 2.82 log CFU/g followed by Chitosan/Silica Nanoparticle at 3.73 and 3.58 log CFU/g for the aerobic bacteria, molds, and yeasts population, respectively. It was observed that (CH) film extracted 94 regions with an average size of 449.10, at the same time (CH-SN) film extracted 169 regions with an average size of 130.53. The (CH-SN-N) film presented the best result at 5.19%. It could be observed that the size of the total region of the fruit for the (CH) case was the smallest (1663 pixels), which implied that the fruit lost moisture content. As a conclusion, (CH-SN-N) film is recommended for blueberry preservation to prolong the shelf-life during storage.

Imine Bond Characterization and Properties for Controlled Release Drugs of Collagen Protein Cross-Linked Cotton Fiber

2011 ◽  
Vol 175-176 ◽  
pp. 214-219 ◽  
Author(s):  
Yun Hui Xu ◽  
Zhao Fang Du ◽  
Yu Yue Chen
Keyword(s):  
Controlled Release ◽  
Cotton Fiber ◽  
Sodium Periodate ◽  
Covalent Bond ◽  
Subsequent Treatment ◽  
Aqueous Acetic Acid ◽  
Cotton Thread ◽  
Collagen Protein ◽  
Ft Ir ◽  
Imine Bond

For exploiting the novel multifunctional ecological cotton fibers, a new cotton fiber with the collagen protein cross-linking (CPCCF) was prepared by the limited selective oxidation of a cotton thread with sodium periodate solution and subsequent treatment with a solution of collagen protein at 40°C in aqueous acetic acid. FT-IR spectra of the CPCCF suggested that the imine covalent bond between the collagen protein and the oxidized cotton fiber was formed through a series of reaction. X-ray diffractograms analysis showed that the crystallinity of oxidized cotton fiber after collagen protein treatment increased slightly. Meanwhile, Scanning electron microscopy photographs illuminated that the modification with collagen protein occurred on the surface of cotton fiber. Kjeldahl nitrogen analysis of the CPCCF showed that the maximum percentage of collagen protein introduced into cotton fiber was 1.68% (w/w). However, the breaking strength of the cotton thread oxidized partially by sodium periodate at the concentration of less than 2.0 mg ml-1 did not decrease much. Furthermore, a model experiment for the controlled release drugs was performed using aloe anthraquinone, components of a Chinese medicine, suggested potential usefulness of the CPCCF as a carrier for the controlled release drugs.

XPS characterization of biocompatible hydroxyapatite-polymer coatings

2002 ◽  
Vol 34 (1) ◽  
pp. 45-49 ◽  
Author(s):  
M. P. Casaletto ◽  
S. Kaciulis ◽  
G. Mattogno ◽  
A. Mezzi ◽  
L. Ambrosio ◽  
...  
Keyword(s):  
Polymer Coatings ◽  
Xps Characterization

Electrochemical and spectroscopic characterization of a dicobalt macrocyclic Pacman complex in the catalysis of the oxygen reduction reaction in acid media

2013 ◽  
Vol 17 (04) ◽  
pp. 252-258 ◽  
Author(s):  
Qinggang He ◽  
Xiao Cheng ◽  
Ying Wang ◽  
Ruimin Qiao ◽  
Wanli Yang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reaction Pathway ◽  
Spectroscopic Characterization ◽  
Reduction Reaction ◽  
Acid Media ◽  
Crystal Fields ◽  
Mononuclear Cobalt ◽  
X Ray Absorption

The dicobalt complex [ Co2(L2) ] of a Schiff-base pyrrole macrocycle adopts a Pacman structure in solution and the solid state and shows much greater catalytic activity and selectivity for the four-electron oxygen reduction reaction (ORR) than the mononuclear cobalt phthalocyanine (CoPc) counterpart. Soft X-ray absorption spectroscopy (XAS) shows that the Co center in Co2(L2) is of the same valence as mononuclear CoPc . However, the former complex shows higher unoccupied Co 3d density which is believed to be beneficial for electron transfers. Furthermore, the XAS data suggests that the crystal fields for Co2(L2) and CoPc are different, and that an interaction remains between two Co atoms in Co2(L2) . DFT calculations imply that the sterically hindered, cofacial structure of the dicobalt complex is critical for the operation of the four-electron reaction pathway during the ORR.

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