添加板栗壳色素对纤维素液态地膜性能的影响

Effects of Chestnut Shell Pigment Addition on Performance of Cellulose-Based Liquid Mulching Film

光老化影响可降解液态地膜的性能和使用寿命。黑色素是生物进化留下的高效光保护剂。文章将黑色素用于液态地膜,探讨板栗壳色素对羧甲基纤维素液态地膜性能的影响。结果表明:板栗壳色素的添加显著提高了地膜的拉伸强度,降低了地膜的断裂伸长率,使膜变得疏松,孔隙增加,水蒸气透过率增大。板栗壳色素的添加还显著提高了地膜的抗氧化能力和抗紫外老化能力。板栗壳色素与羧甲基纤维素的质量比为5∶3时,液态地膜可有效减缓土壤水分蒸发,具有良好的土壤保水性能。板栗壳色素可作为一种廉价环保的可降解液态地膜光保护剂。

Photoaging affects the performance and service life of degradable liquid plastic film.Melanin is a highly effective photoprotectant left by biological evolution.In this paper,melanin was used in liquid mulch film,and the effect of chestnut shell pigment on the performance of carboxymethyl cellulose liquid mulch film was discussed.The results showed that the addition of chestnut shell pigment significantly improved the tensile strength of the plastic film,reduced the elongation at break,made the film loose,increased the pores,and increased the water vapor permeability.The addition of chestnut shell pigment also significantly improved the antioxidant capacity and ultraviolet aging resistance of plastic film.When the mass ratio of chestnut shell pigment to carboxymethyl cellulose was 5:3,the liquid mulch film could effectively slow down the evaporation of soil water and had good soil water retention performance.Chestnut shell pigment can be used as a cheap and environmentally friendly degradable liquid mulch film photoprotectant.