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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Controlled release of 2,4-D from granule matrix formulations based on six lignins.
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Controlled release of 2,4-D from granule matrix formulations based on six lignins.

机译:从基于六种木质素的颗粒基质制剂中控制释放2,4-D。

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摘要

Six lignins were used to produce granular controlled release matrix formulations of 2,4-D. The water-insoluble lignins were derived from sugarcane bagasse, and from Eucalyptus sp. and Pinus sp. woods. Each lignin was characterized by its functionalgroups and molecular weight distributions. The formulations were prepared by melting the 2,4-D and mixing in the lignins individually and then granulating (to 0.7-1.0 mm) the glassy matrix. Release rates determined in static water were correlated to a diffusion-controlled mechanism according to the square root of time. Principal component regression of the slopes of these lines showed that these depend inversely on the molecular weight and the total and aliphatic hydroxyls of the lignins. For the otherfunctional groups (aromatic hydroxyls, methoxyls, and carbonyls), the higher their contents, the higher the diffusion and release rates.
机译:六种木质素用于生产2,4-D的颗粒控释基质配方。水不溶性木质素衍生自甘蔗渣和桉树属。和松属。树木。每种木质素的特征在于其官能团和分子量分布。通过熔融2,4-D并分别在木质素中混合然后将玻璃状基质制粒(至0.7-1.0mm)来制备制剂。根据时间的平方根,在静态水中确定的释放速率与扩散控制机制相关。这些线的斜率的主成分回归表明,它们反比取决于木质素的分子量以及总羟基和脂肪族羟基。对于其他官能团(芳族羟基,甲氧基和羰基),其含量越高,扩散和释放速率越高。

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