Collagen structure changes during chrome tanning in propylene carbonate

Zhang, Yi; Buchanan, Jenna K.; Holmes, Geoff; Mansel, Bradley W.; Prabakar, Sujay

doi:10.1186/s42825-019-0011-y

Cited by 15 publications

(12 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The analysis and study of the structure and properties of collagens in semi-finished leather after liquid processing with chemical additives are given in [5,6].…”

Section: Introductionmentioning

confidence: 99%

Study of the Efficiency of Squeezing Moisture-Saturated Products

2021

View full text Add to dashboard Cite

The leather industry includes many technological machines; a squeezing roller machine is used in many operations, for example, in squeezing, degreasing, and after drum dyeing of a semi-finished leather product. The paper presents the results of experimental studies obtained by determining the influence of multilayer wet leather semi-finished products with monshons under squeezing on the amount of the moisture extracted. Mathematical dependences of the amount of the moisture extracted, for each layer of a five-layer wet leather semi-finished product on the feed rate between the squeeze rollers and the roller pressure were obtained. Experimental research is of scientific and practical importance for the development of a technological process for extracting moisture from wet leather semi-finished products used in the tannery, since the quality of the extraction affects the quality of subsequent technological operations, such as leather shaping and splitting. An experimental study was performed using the method of mathematical statistics, namely, the method of mathematical planning of the experiment. Mathematical models were obtained for the amount of extracted moisture from five wet leather semi-finished products depending on the rate of their simultaneous feed and the pressure of the squeezing rollers. The results of the experiment showed that in squeezing a five-layer product, the productivity of the technological process of extracting moisture from wet leather semi-finished products increases by five times in comparison with existing squeezing roller machines. The use of the results of the experimental study will contribute to a significant reduction in the energy consumption of the squeezing roller machine by simultaneous multi-layer processing of wet leather semi-finished products

show abstract

“…The analysis and study of the structure and properties of collagens in semi-finished leather after liquid processing with chemical additives are given in [5,6].…”

Section: Introductionmentioning

confidence: 99%

Study of the Efficiency of Squeezing Moisture-Saturated Products

2021

View full text Add to dashboard Cite

show abstract

“…The DSC denaturation curves of the modified GE films are shown in Figure together with the pristine GE, which is necessary to study the denaturation of leather . Among them, the thermal denaturation temperature ( T d ) of SGE, SGE‐G, SGE‐G‐N, and SGE‐G‐C increased to 80.2 ± 1.2 °C, 83.9 ± 0.8 °C, 89.2 ± 0.6 °C, and 81.8 ± 0.7 °C, respectively, from that of GE film (63.4 ± 0.5 °C), suggesting a better thermal stability obtained after modification.…”

Section: Resultsmentioning

confidence: 99%

Action of silicic acid derived from sodium silicate precursor toward improving performances of porous gelatin membrane

Zhang

Liu

Gao

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

To gain an insight into understanding how the silica network generated from hydrolysis and condensation of silicic acid, derived from sodium silicate, enhancing hydrothermal stability and mechanical properties of the leather, and particularly which active groups playing a main role for interaction of silica with collagen protein molecules, herein, effects of incorporated amino or carboxyl groups on the properties of silicic acid modified gelatin (GE) membrane were intensively studied. We found when lots of amino groups were introduced by adding a modified melamine, the thermal denaturation temperature, uniformity of pore diameter distribution and mechanical strength of GE membrane distinctly increased, while incorporating plenty of carboxyl groups by adding low polymerization degree acrylic acid polymer, no obvious change of performances of GE film was discovered. In addition, utilization of γ-glycidoxypropyltrimethoxysilane had a positive effect on the porosity and flexibility of GE membrane. Importantly, our results indicated that hydrogen bonding probably played the most important role toward improving performances of porous GE film when treated with silicic acid. These findings are greatly beneficial for developing a chrome-free tanning technology based on silicon containing materials, and are also suggestive for fabricating porous silica-GE hybrid materials using sodium silicate as a precursor.

show abstract

“…to produce various products [2]. During the tanning process, only the collagen used as the main ingredient can react with the tanning agent, eliminating all non-collagen rawhide [3].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Pollution Profile of the Tanning Industry by Distance in Gandong River, Indonesia

Sevi

Suprijandani

Rachmaniyah

et al. 2022

International Journal of Advanced Health Science and Technology

View full text Add to dashboard Cite

River water quality is influenced by several factors, one of then is caused by industrial waste discharged into river bodies. Effluent discharged into water bodies contains heavy metals, pungent odours, and makes the colour of water in water bodies cloudy. the purpose of the study examined the effect of tannery effluent distance on the water quality of the Gandong River in Magetan Regency. Benefits For the company As a consideration to maximize WWTP processing actions so as not to pollute the river environment. for the surrounding community to know also the consequences caused by pollution of tanning industry waste so that they are more careful in reprocessing the use of river water. This type of the reseach was observational with a cross sectional approach. A purposive sampling technique was used. The data analysis methode was a correlation test by comparing laboratory test results with Gandong River water quality standards according to PP. RI. No 82 of 2001. Parametric statistical tests using Product-Moment Correlation to determine the relationsbetweenp of distance from the tannery industry affects the water quality of the Gandong River in Magetan Regency. The results showed that the water quality of Gandong River did not meet the requirements of COD 118 mg/l and colour 61.85 TCU/PtCo, at a distance of 250 m which exceeded the quality standards of COD 133 mg/l and colour 54.90 TCU/PtCo, at a distance of 500 m which did not meet the requirements of COD 89 mg/l, at a distance of 750 m which did not meet the requirements of COD 89 mg/l. temperature and TSS parameters. The highest results at a distance of 0 m of 27˚C and 368 mg / l meet the quality standard requirements for odour obtained odorous results. From the results of the study, it can be concluded that the parameters of pH, TSS, Temperature, and Odour still meet the quality standards and the parameters of colour, COD do not meet the quality standards. Based on the Product Moment correlation analysis, the relationship between distance and river water quality shows different values for correlation results that have a relationship, namely the parameters of odour, colour, COD and results that do not have a correlation of temperature and TSS. So the farther the distance from the pollutant source, the better the river water quality.

show abstract

Collagen structure changes during chrome tanning in propylene carbonate

Cited by 15 publications

References 28 publications

Study of the Efficiency of Squeezing Moisture-Saturated Products

Study of the Efficiency of Squeezing Moisture-Saturated Products

Action of silicic acid derived from sodium silicate precursor toward improving performances of porous gelatin membrane

Characterization and Pollution Profile of the Tanning Industry by Distance in Gandong River, Indonesia

Contact Info

Product

Resources

About