The effect of deproteinization temperature and NaOH concentration on deacetylation step in optimizing extraction of chitosan from shrimp shells waste

Aldila, Herman; Asmar,; Fabiani, Verry Andre; Dalimunthe, Desy Yuliana; Irwanto, Riko

doi:10.1088/1755-1315/599/1/012003

Cited by 18 publications

(13 citation statements)

References 24 publications

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“…Perenggangan gugus C=O pada pita amida dan vibrasi ikatan gugus CO-NH pada daerah 1655 cm -1 dan 1310 cm -1 mengindikasikan proses deasetilasi pada kitin (Kumari, 2015). Pada konsentrasi NaOH 60% daerah ini lebih rendah relatif dengan yang lain mengindikasikan bahwa semakin banyak kitin yang terdeasetilasi selama proses reaksi dan menyebabkan nilai derajat deasetilasi akan semakin meningkat (Aldila, 2020). Hal ini juga ditandai dengan terbentuknya daerah serapan pada 1430 cm -1 yang mengindikasikan vibrasi renggangan dari gugus C-H yang merupakan deformasi dari alkana (Dompeipen, 2017).…”

Section: Metodeunclassified

“…Penentuan nilai derajat deasetilasi kitosan ditentukan dengan menggunakan metode base line berdasarkan spektrum FTIR (Aldila, 2020), dengan persamaan:…”

Section: Gambar 2 Spektrum Ftir Kitosan Pada Berbagai Variasi Konsentrasi Naohunclassified

“…Peningkatan konsentrasi larutan NaOH menyebabkan peningkatan nilai derajat deasetilasi kitosan. Kitin secara alami memiliki struktur kompak (padat dan rapat) yang dapat membentuk penghalang sterik (steric hindrance) sehingga menghambat proses deasetilasi (Aldila, 2020). Peningkatan konsentrasi NaOH pada proses reaksi menyebabkan terjadinya peningkatan laju difusi OH pada permukaan hingga mampu menembus penghalang sterik sampai ke dalam partikel kitin.…”

Section: Gambar 2 Spektrum Ftir Kitosan Pada Berbagai Variasi Konsentrasi Naohunclassified

“…Struktur molekul kitosan Daya adsorbsi kitosan terhadap logam tembaga terlarut ditentukan oleh jumlah gugus amina dan hidroksil pada struktur kitosan. Keberadaan kedua gugus tersebut membuat kitosan mempunyai reaktivitas yang tinggi sehingga bersifat sebagai kation polielektrolit (Aldila, 2020). Salah satu model yang menjelaskan mengenai mekanisme interaksi adsorbsi kitosan dengan logam tembaga terlarut adalah model pembentukan kelat (Benavente, 2008).…”

Section: Gambar 2 Spektrum Ftir Kitosan Pada Berbagai Variasi Konsentrasi Naohunclassified

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Ekstraksi Kitosan dari Limbah Cangkang Udang sebagai Adsorben Ion Logam Cu pada Air Kolong Timah Bangka

Aldila¹

2021

PROMINE

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Penelitian ini bertujuan untuk menganalisis pengaruh konsentrasi NaOH pada tahap deasetilasi terhadap adsorpsi kitosan ion logam Cu pada kolong timah Bangka. Ekstraksi kitosan dilakukan dalam empat tahap yaitu deproteinisasi, demineralisasi, dekolorisasi dan deasetilasi kitin. Pengaruh konsentrasi NaOH pada proses deasetilasi dipelajari. Hasil penelitian menunjukkan bahwa peningkatan konsentrasi NaOH dari 20% menjadi 60% maka kitosan DD meningkat. Laju difusi OH- menyebabkan peningkatan serangan OH- ke gugus amino sehingga mewujudkan deasetilasi kitin yang efektif. Kadar logam Cu pada penelitian ini mencapai 0,32 ppm. Adsorpsi kitosan pada ion logam cu menurunkan kadar terlarut rata-rata 99,67% dari kadar awal. Kandungan gugus hidroksil pada kitosan menyebabkan terjadinya reaksi pembentukan senyawa hidroksida dari ion logam Cu terlarut. Senyawa Cu hidroksida secara terpisah akan membentuk dan membentuk endapan. Semakin besar nilai derajat deasetilasi menyebabkan peningkatan kandungan gugus hidroksil dan menyebabkan peningkatan adsorpsi ion logam Cu.

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Section: Metodeunclassified

“…Penentuan nilai derajat deasetilasi kitosan ditentukan dengan menggunakan metode base line berdasarkan spektrum FTIR (Aldila, 2020), dengan persamaan:…”

Section: Gambar 2 Spektrum Ftir Kitosan Pada Berbagai Variasi Konsentrasi Naohunclassified

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Ekstraksi Kitosan dari Limbah Cangkang Udang sebagai Adsorben Ion Logam Cu pada Air Kolong Timah Bangka

Aldila¹

2021

PROMINE

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“…Chitosan extraction is the process of isolating chitosan from chitin which generally comes from the shells of crustaceans and several types of insects and in small amounts can also be found in certain fungi and mosses [1]. Chitosan extraction process generally consists of deproteinization, demineralization and deacetylation processes [2][3]. In this optimization process, some modifications are sometimes made to get the desired chitosan performance with high yields.…”

Section: Introductionmentioning

confidence: 99%

The kinetic adsorption of zinc metal ions in Bangka post tin mining water on chitosan from shrimp shells waste

Aldila

Indriawati

Kusmita

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The effect of deproteinization temperature on chitosan extraction process from shrimp shells waste used variation of temperature: 30, 60 and 90°C was studied. The results shown that the degree of deacetylation of chitosan (DD) decreased with increasing deproteinization temperature. This is probably due to excess polymerization reaction when the deproteinization temperature increases, thereby destroying the chitin structure. The highest chitosan DD achieved was up to 79.72% at temperature deproteinization of 30°C and the occurrence of deacetylation structurally demonstrated by the Fourier transform infrared characterization. The chitosan adsorption for zinc metal ions in Bangka post tin mining water shown that the systems of adsorption follow the pseudo second order kinetic model. Based on the equation of kinetics adsorption shown that the increase of chitosan DD causes the adsorption rate and maximum adsorption capacity increased. The increase of chitosan DD which is an indicator of the transformation of chitin into chitosan represents an increase in the number of amine groups which have a stronger metal ion adsorption. The highest of adsorption rate coefficient and maximum adsorption capacity was up to 1.215 g mg−1 min−1 and 0.15 mg g−1 respectively achieved at temperature deproteinization of 30°C.

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Environment friendly biomass composite aerogel with reinforced mechanical properties for thermal insulation and flame retardancy application

Deng,

Li,

et al. 2023

Polymer Engineering & Sci

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Biomass aerogels have attracted wide attention due to their excellent thermal insulation properties, but their low mechanical strength and high susceptibility to combustion limit their application. To address these limitations, a novel composite aerogel was prepared by combining chitosan aerogel (CS) and hydroxyapatite nanowires (HAP) via phytic acid (PA) cross‐linking and freeze‐drying. It was found that the maximum compressive strength and modulus of CS/HAP aerogel were 1.13 and 0.67 MPa, respectively. The minimum thermal conductivity of CS/HAP(0.5) composite aerogel was 0.03921 W m−1 K−1, indicating its good thermal insulating property. Moreover, the CS/HAP composite aerogel also showed excellent flame‐retardant properties. The heat release rate (HRR) and total heat release from combustion (THR) were significantly lower than those of the CS aerogel, with values of 35.2 kW m−2 and 3.7 MJ m−2, respectively, compared to 169.6 kW m−2 and 5.4 MJ m−2. The total smoke release (TSR) was also at a low level, reaches 0.4 m2 m−2.Highlights Propose a novel chitosan aerogel composited with inorganic nano‐reinforced HAP. High mechanical strength of CS/HAP composite aerogel are illustrated. Exhibit excellent thermal insulation performance of CS/HAP aerogel. HAP and PA largely improves the flame retardancy of the chitosan aerogel.

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The effect of deproteinization temperature and NaOH concentration on deacetylation step in optimizing extraction of chitosan from shrimp shells waste

Cited by 18 publications

References 24 publications

Ekstraksi Kitosan dari Limbah Cangkang Udang sebagai Adsorben Ion Logam Cu pada Air Kolong Timah Bangka

Ekstraksi Kitosan dari Limbah Cangkang Udang sebagai Adsorben Ion Logam Cu pada Air Kolong Timah Bangka

The kinetic adsorption of zinc metal ions in Bangka post tin mining water on chitosan from shrimp shells waste

Environment friendly biomass composite aerogel with reinforced mechanical properties for thermal insulation and flame retardancy application

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