An Evaluation on Physical Characteristics of Konjac Polysaccharides-Based Film Coating and Its Application for Strawberries Preservation  

作　　者：Desy Nurliasari Awaly Ilham Dewantoro Muhammad Adly Rahandi Lubis Roni Kastaman Mohamad Djali Efri Mardawati Devi Maulida Rahmah Siti Nurhasanah Akbar Hanif Dawam Abdullah Lukmanul Hakim Zaini 

机构地区：[1]Department of Agricultural Industrial Technology,Faculty of Agro-Industrial Technology,Universitas Padjadjaran,Jatinangor,45363,Indonesia [2]Research Center for Biomass and Bioproducts,National and Innovation Agency,Cibinong,1691,Indonesia [3]Research Collaboration Center for Biomass and Biorefinery between BRIN and Universitas Padjadjaran,Jatinangor,45363,Indonesia [4]Research Center for Appropriate Technology,Universitas Padjadjaran,Jatinangor,45363,Indonesia [5]Department of Food Industrial Technology,Faculty of Agro-Industrial Technology,Universitas Padjadjaran,Jatinangor,45363,Indonesia [6]Department of Forest Products,Faculty of Forestry and Environment,IPB University,Bogor,16680,Indonesia [7]Institute of Wood Technology and Renewable Materials,Department of Material Sciences and Process Engineering,University of Natural Resources and Life Sciences,Vienna(BOKU),Vienna,1180,Austria

出　　处：《Journal of Renewable Materials》2025年第1期181-197,共17页可再生材料杂志(英文)

基　　金：funded by the Academic Leadership Grant of Universitas Padjadjaran,Bandung,Indonesia,with grant number 1540/UN6.3.1/PT.00/2024;the Research Collaboration Center for Biomass and Biorefinery,Bandung,Indonesia,with grant number B-1723/II.7/HK.01.00/4/2024.

摘　　要：Konjac is an ideal candidate for edible coatings on fruits due to its hydrophilic properties,film-forming ability,barrier properties,safety,and biodegradability.Meanwhile,the high market demand for strawberries necessitates post-harvest treatment to extend their shelf life and preserve their quality,as strawberries are known for their fragile skin and soft texture.To fully utilize konjac and develop high-quality coatingfilms,native konjacflour(NKF)and konjac glucomannan(KGM)were extracted from its corm and used as a coatingfilm for strawberries in the present study.Therefore,this study aimed to compare the physical properties of thefilm coatings between NKF and KGM,and evaluate their effects on strawberries preservation over 7 days of storage.A multistage extrac-tion process was employed to isolate NKF and KGM,after which the glucomannan content was measured.NKF yield was 31.81%,exceeding KGM yield of 26.42%,and the glucomannan content obtained of NKF(25.93%)was higher than KGM(21.41%).Nuclear magnetic resonance spectroscopy confirmed that both NKF and KGM con-tain glucomannan in their structure.Furthermore,both NKF and KGM were combined with carboxymethyl cel-lulose(CMC)and glycerol to produce eight thin-layerfilms to assess their physical and mechanical properties.Compared to the KGM variant,the NKF variant generally exhibited higher moisture content,water vapor trans-mission rate,and tensile strength.However,NKF was less effective than KGM in extending strawberry storage life,leading to faster color changes and greater weight loss,despite maintaining similar hardness values.Nonetheless,konjac-based coatings were generally effective at maintaining the freshness and quality of strawberries compared to uncoated samples.Konjac shows promise as an edible coating,improving fresh produce shelf life and appeal,aligning with consumer preferences for natural and sustainable products.

关 键 词：Amorphophalus oncophyllus coating performances ediblefilm strawberry preservation 

分 类 号：O63[理学—高分子化学]