胺基载体选择性渗透膜对西兰花品质的影响

目的研究自制胺基载体选择性渗透膜对西兰花品质的影响。方法以自制选择性渗透膜为包装材料,纯LDPE薄膜处理、硅藻土改性基膜处理、自然放置为对照,于室温密封储存,定期测定各种包装材料内西兰花的品质变化。根据贮存期间各包装材料内西兰花的质量损失率、色差、可溶性固形物含量、硬度、褐变度、维生素C含量等各项指标的变化来评价所制备选择性渗透膜的保鲜性能。结果贮存9 d后,自制选择性渗透膜包装内西兰花的质量损失率、色差、可溶性固形物含量、硬度、褐变度、维生素C含量等指标均高于纯LDPE薄膜、基膜和自然放置对照组,但褐变度低于对照组。结论自制选择性渗透膜能够通过调节包装中CO_2和O_2的选择性渗透,有效控制果蔬呼吸速率,以达到延长储存期的目的。

Effects of Perm-selective Membranes of Amine Carrier on Quality of Broccoli

The work aims to study the effect of perm-selective membranes of amine carrier on the quality of broccoli. With the perm-selective membrane as the packaging materials, and the pure LDPE membrane treatment, treatment of modified basement membrane with diatomite and natural placement as the control group, the above-mentioned membranes were stored at the room temperature, and the quality change of broccoli wrapped in all kinds of packaging materials was regularly measured. According to the change of mass loss rate, chromatic aberration, total soluble solid, hardness, browning, vitamin C and other indicators of the broccoli in various packaging materials during the storage, the fresh-keeping performance of perm-selective membranes prepared was evaluated. After the 9 days'' storage, the mass loss rate, chromatic aberration, total soluble solid, hardness, vitamin C and other indicators of the broccoli packaged in the self-made perm-selective membranes were higher than those of the control group in question, but the browning was lower than that of the control group. The perm-selective membranes can effectively control the respiratory rate of fruits and vegetables by regulating the selective permeation of CO2 and O2 in the package, so as to prolong the storage period.