Kaewprachu Pimonpan, Jaisan Chalalai, Klunklin Warinporn, Phongthai Suphat, Rawdkuen Saroat, Tongdeesoontorn Wirongrong
College of Maritime Studies and Management, Chiang Mai University, Samut Sakhon 74000, Thailand.
Cluster of Innovative Food and Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand.
Polymers (Basel). 2022 May 3;14(9):1872. doi: 10.3390/polym14091872.
Carboxymethyl cellulose from young Palmyra palm fruit husk (CMCy) film has low water barrier properties, which can limit its application. Thus, the combination of CMCy with other polysaccharides, such as rice flour (RF), may solve this problem. The aim of this study is to prepare the CMCy/RF composite films in different proportions (CMCy100, CMCy75/RF25, CMCy50/RF50, CMCy25/RF75, and RF100) and investigate their mechanical and physicochemical properties. The film strength (33.36−12.99 MPa) and flexibility (9.81−3.95%) of the CMCy/RF composite films decreased significantly (p < 0.05) with an increase in the RF proportion. Blending the RF with CMCy could improve the water vapor permeability (9.25−6.18 × 10−8 g m m−2 s−1 Pa−1) and film solubility (82.70−21.64%) of the CMCy/RF composite films. Furthermore, an increased lightness with a coincidental decreased yellowness of the CMCy/RF composite films was pronounced when the RF proportion increased (p < 0.05). However, the addition of RF in different proportions did not influence the film thickness and transparency. Based on SEM micrographs, all film samples had a relatively coarser surface. FTIR spectra showed that some interactions between CMCy and RF blended films had occurred. According to these findings, the CMCy50/RF50 composite film was found to be the best formulation because it has good mechanical and physicochemical properties.
来自年轻棕榈果壳的羧甲基纤维素（CMCy）薄膜具有较低的阻水性能，这可能会限制其应用。因此，将CMCy与其他多糖，如米粉（RF）结合，可能会解决这个问题。本研究的目的是制备不同比例（CMCy100、CMCy75/RF25、CMCy50/RF50、CMCy25/RF75和RF100）的CMCy/RF复合薄膜，并研究它们的机械和物理化学性能。随着RF比例的增加，CMCy/RF复合薄膜的薄膜强度（33.36−12.99 MPa）和柔韧性（9.81−3.95%）显著降低（p < 0.05）。将RF与CMCy混合可以提高CMCy/RF复合薄膜的水蒸气透过率（9.25−6.18×10−8 g m m−2 s−1 Pa−1）和薄膜溶解度（82.70−21.64%）。此外，当RF比例增加时，CMCy/RF复合薄膜的亮度增加，同时黄色度降低，这一现象很明显（p < 0.05）。然而，不同比例添加RF并不影响薄膜厚度和透明度。基于扫描电子显微镜图像，所有薄膜样品的表面相对粗糙。傅里叶变换红外光谱表明，CMCy和RF混合薄膜之间发生了一些相互作用。根据这些发现，发现CMCy50/RF50复合薄膜是最佳配方，因为它具有良好的机械和物理化学性能。
