Recent studies proposed the use of soy protein-based bioplastic matrices with incorporated micronutrient to mitigate against the excessive use of fertilizers in horticulture. However, the micronutrient incorporation reduced the superabsorbent capacity of these bioplastic matrices. All this reduces their use as a source of water for crops in times of drought, among other possibilities. The objective of this study was to evaluate different alternatives in order to incorporate the desired micronutrient (Zn) in soy protein-based bioplastics without losing the superabsorbent capacity of the latter. For this, three salts were used: zinc sulphate monohydrate (ZnSO₄·H₂O), zinc chloride (ZnCl₂) and zinc chelated with 2,2′,2′′,2′′′-(Ethene-1,2-diydinitrilo)tetraacetic acid (Zn-EDTA). Considering the possible factors that can affect the absorption of these bioplastic matrices, modifications were made in their pH, ionic strength and complex character of the salt. Thus, the amount of load micronutrient, mechanical and morphological properties, as well as water uptake capacity of the bioplastic matrices with different salts incorporated were evaluated. The results of this study helped to understand the effects of the loss of the superabsorbent capacity of soy protein-based bioplastic matrices with incorporated zinc.

最近的研究提出使用结合了微量营养素的大豆蛋白基生物塑料基质，以减轻园艺中肥料的过度使用。但是，微量营养素的掺入降低了这些生物塑料基质的超吸收能力。所有这些减少了它们在干旱时期作为农作物水源的用途。这项研究的目的是评估不同的替代方法，以便将所需的微量营养素（Zn）掺入基于大豆蛋白的生物塑料中，而又不会失去后者的超吸收能力。为此，使用了三种盐：一水合硫酸锌（ZnSO ₄ ·H ₂ O），氯化锌（ZnCl ₂）和锌与2,2'，2''，2'''-（乙烯-1,2-二乙二腈）四乙酸（Zn-EDTA）螯合。考虑到可能影响这些生物塑料基质吸收的可能因素，对它们的pH，离子强度和盐的复杂特性进行了修改。因此，评估了掺入不同盐的生物塑料基质的负载微量营养素的量，机械和形态学性质以及吸水能力。这项研究的结果有助于了解含锌的大豆蛋白基生物塑料基质的超吸收能力丧失的影响。