Technology of reducing Cr(VI) on leather processing using mimosa as retanning agent

Anggriyani, Emiliana; Nugroho, Alfani Risman; Rosiati, Nur Mutia

doi:10.24264/lfj.19.1.8

Cited by 2 publications

(2 citation statements)

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“…The methylene group is detected at 1455-1458 cm -1 from its bending vibration [18]. Furthermore, absorption of C-H asymmetric stretching vibration appears at 2926-2927 cm -1 [30]. Vibration broadband at 3339-3406 cm -1 is identified as O-H stretching [31].…”

Section: Functional Groups Identificationmentioning

confidence: 97%

Hydrophobic Coating of Vegetable-Tanned Leather with Dodecylamine

Rosiati,

Udkhiyati,

Silvianti

2024

Text Leather Rev

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Vegetable-tanned leather exhibits a hydrophilic character due to the abundance of hydroxyl groups (-OH). In this study, the surface of vegetable-tanned leather was modified to become hydrophobic. The leather was coated using dodecylamine (DDA) through the padding method in the finishing process. The concentration of DDA varied from 1%, 2%, 3%, and 4% to identify the optimum concentration. The coating process was assisted by an activator, either acid or base, to improve the adhesion of DDA to leather. Uncoated vegetable-tanned leather was used as a control. The success of coating was identified using FT-IR and SEM-EDX analysis. The hydrophobicity of leather was conducted through a water resistance test. The success of coating is shown by the increase in their weight and thickness. Absorption bands of alkyl and amino groups of DDA are observed in FT-IR spectra around 1450 cm-1 and 3400 cm-1, respectively. SEM micrographs show that coated leathers have flatter surfaces as a consequence of DDA attachment on the leather surface. The water resistance test proves that the use of DDA can improve the leather hydrophobicity and enhance the water absorption time by up to 4 times. The optimum water absorption time is obtained when using 2% DDA.

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Section: Functional Groups Identificationmentioning

confidence: 97%

Hydrophobic Coating of Vegetable-Tanned Leather with Dodecylamine

Rosiati,

Udkhiyati,

Silvianti

2024

Text Leather Rev

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“…Currently the natural tanning material which is widely used is mimosa tannin. Excess use of mimosa tannin can reduce Cr (VI) when used as a re-tanning [1]. In addition, mimosa tannin as tanning material can increase tensile strength, tensile strength and elongation of the resulting leather [2].…”

Section: Introductionmentioning

confidence: 99%

The quality of rabbit hide tanned by mangrove (Rhizopora mucronata)

Pancapalaga¹,

Nitiharjo²

2019

LFJ

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Mangrove stem (Rhizopora mucronata) contains a tannin compound which has potential as tanning material as well as tanner leather coloring. Meanwhile, the public uses more tannin from mimosa tannin and has not optimized the use of mangrove tannins. This study aimed to determine the quality of rabbit hide tanned from mangrove tannin and mimosa tannin. The material used was Rex rabbit hide of 1-year age cut. The research method used a completely random design (CRD) experiment. The treatment ratio of mangrove stem tannin and tannin mimosa concentration were 0:30%, 10:20%, 20:10% and 30%:0. The parameters measured by chemical properties consist of: degree of tanning, moisture, ash and tannin bound to the skin. Physical properties consisted of: tensile strength, elongation and sewing strength. The results showed that the use of mangrove tannin and mimosa tannin for tanning ratios had no significant effect (P> 0.05) on the level of tanning, moisture, ash, and tannin that were bound to tanned skin, tensile strength, elongation and sewing strength. The results showed that the quality of tanned hide had a tanning degree of 62.31%, 13.32% moisture content, 1.57% ash content, and 25.14% tannin content. The physical quality of tensile strength was 356.35 N/cm, elongation was 29.80% and sewing strength is 84.41 Kg/cm. The results of the quality of this tanned hide had fulfilled SNI 06-6121-1999 of leather goods. The conclusion was that tannin extract from mangroves can be used as vegetable tanning agent, with the same quality as mimosa tanning agent. KEY WORDS: mangrove tannin, mimosa tannin, rabbit hide, quality of hide CALITATEA PIELII DE IEPURE TĂBĂCITĂ CU MANGROVE (Rhizopora mucronata)REZUMAT. Tulpina de mangrove (Rhizopora mucronata) conţine un tanin care are potenţial ca material de tăbăcire, precum şi de colorare a pielii tăbăcite. Pe de altă parte, se foloseşte mai mult tanin din mimosa, iar utilizarea taninului din mangrove nu este optimizată. Acest studiu are scopul de a determina calitatea pielii de iepure tăbăcite cu tanin din mangrove şi tanin din mimosa. S-a utilizat ca material o piele de iepure Rex, la vârsta de 1 an. Metoda de cercetare a presupus desfăşurarea unui experiment cu design complet aleatoriu (CRD). Rapoartele de concentraţii de tanin din tulpină de mangrove şi tanin din mimosa au fost de 0:30%, 10:20%, 20:10% şi 30%:0. Parametrii măsuraţi prin proprietăţile chimice au reprezentat: gradul de tăbăcire, umiditate, cenuşă şi taninul legat de piele. Proprietăţile fizice au constat în: rezistenţă la tracţiune, alungire şi rezistenţă la coasere. Rezultatele au arătat că utilizarea taninului din mangrove şi a taninului din mimosa în raporturile de concentraţii menţionate nu a avut niciun efect semnificativ (P> 0,05) asupra valorilor gradului de tăbăcire, umidităţii, cenuşii şi taninului legat de pielea tăbăcită, rezistenţei la tracţiune, alungirii şi rezistenţei la coasere. Rezultatele au arătat că pielea tăbăcită a avut un grad de tăbăcire de 62,31%, umiditate 13,32%, conţinut de cenuşă 1,57% şi conţinut ...

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Technology of reducing Cr(VI) on leather processing using mimosa as retanning agent

Cited by 2 publications

References 0 publications

Hydrophobic Coating of Vegetable-Tanned Leather with Dodecylamine

Hydrophobic Coating of Vegetable-Tanned Leather with Dodecylamine

The quality of rabbit hide tanned by mangrove (Rhizopora mucronata)

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