Facultad de Ingeniería Química, Universidad Autónoma de Yucatán, Periférico Norte, Kilómetro 33.5 Chuburná de Hidalgo Inn, Mérida, Yucatán C.P. 97203, Mexico.
Unidad de Materiales, Centro de Investigación Científica de Yucatán, A.C., Calle 43 #130 entre 32 y 34, Chuburná de Hidalgo, Mérida, Yucatán C.P. 97205, Mexico.
Int J Biol Macromol. 2024 Jan;255:128408. doi: 10.1016/j.ijbiomac.2023.128408. Epub 2023 Nov 26.
Plant-based polysaccharides are considered a good alternative for obtaining edible films and coatings. In this research the objective was to determine the physicochemical characteristics of corn starch obtained from QPM Sac-Beh (SBCS) and Delonix regia galactomannan (DRG) and use them to produce films. Films were elaborated from 1 %(w/v) film-forming solutions (FFS) with SBCS:DRG 1:0, 1:1, and 0:1 ratio. Some films were prepared with glycerol 0.4 %(w/v) and vanillin 0.1 %(w/v). SBCS and DRG were characterized by infrared spectroscopy, X-ray diffraction, scanning electron microscopy and differential scanning calorimetry. SBCS presented low crystallinity which agrees with a low gelatinization ΔH observed. The SBCS:DRG 1:0 FFS without glycerol did not form films; however, DRG addition allows film formation. It was also found that glycerol addition reduced tensile strength to 10.3 MPa, from 41.3 MPa. The lowest water vapor permeability was found in films with 1:1 SBCS:DRG and 0.1 %(w/v) vanillin. This formulation was used to coat D'Anjou pears. This coating conserved the pears' color for 24 days while the control ones started to get a brown color on day 6. Based on the results obtained, FFS elaborated with 1:1 SBCS:DRG and 0.1 %(w/v) vanillin had potential use as edible film material for coating on climacteric fruits preservation.
植物多糖被认为是获得可食用薄膜和涂层的良好替代品。本研究的目的是确定 QPM Sac-Beh（SBCS）玉米淀粉和无忧花半乳甘露聚糖（DRG）的理化特性，并将其用于生产薄膜。使用 SBCS:DRG 1:0、1:1 和 0:1 比例的 1%（w/v）成膜溶液（FFS）制备薄膜。一些薄膜中添加了 0.4%（w/v）甘油和 0.1%（w/v）香草醛。用红外光谱、X 射线衍射、扫描电子显微镜和差示扫描量热法对 SBCS 和 DRG 进行了表征。SBCS 结晶度低，与观察到的低凝胶化焓 ΔH 一致。不含甘油的 SBCS:DRG 1:0 FFS 不能成膜；然而，添加 DRG 允许成膜。还发现添加甘油会将拉伸强度从 41.3 MPa 降低到 10.3 MPa。在 1:1 SBCS:DRG 和 0.1%（w/v）香草醛的薄膜中发现水蒸气透过率最低。使用该配方对安久梨进行了涂层处理。这种涂层可使梨的颜色保持 24 天，而对照梨在第 6 天开始变成棕色。根据所得结果，用 1:1 SBCS:DRG 和 0.1%（w/v）香草醛制备的 FFS 具有作为可食用涂层材料的潜力，可用于延缓成熟水果的保鲜。
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