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为增加牡丹(Paeonia suffruticosa Andr.)切花的弹性、韧性和质感,用20 g·L-1壳聚糖与5%柠檬酸(1︰1)复合涂剂,采用高压电动喷涂工艺处理切花,在对真空度、喷嘴孔径和喷涂距离单因素试验的基础上进行Box-Behnken中心组合试验设计,并通过响应面回归分析优化工艺参数。结果表明,牡丹切花高压电动喷涂的最佳工艺为:真空度72.5 k Pa,喷嘴孔径1.1 mm,喷涂距离51.2 cm。在此条件下对牡丹切花进行复合涂剂喷涂处理,其在常温下贮藏一周后花瓣的拉伸强度为14.40 MPa,穿刺强度为8.13 MPa,与对照相比该工艺可保持牡丹切花原有的组织结构,并使其抗磨、抗压、抗震等物理性能明显增强。
In order to increase the elasticity, toughness and texture of cut flowers of Paeonia suffruticosa Andr. Cut flowers were treated with 20 g · L -1 chitosan and 5% citric acid (1︰1) The Box-Behnken central composite design was designed based on single-factor experiments of vacuum degree, nozzle aperture and spray distance, and the process parameters were optimized by response surface regression analysis. The results showed that the best technics of high voltage electric spraying peony cut flowers was: vacuum degree 72.5 kPa, nozzle aperture 1.1 mm, spray distance 51.2 cm. Under this condition, the peonies cut flowers were sprayed with the compound coating agent. The tensile strength of the petals after storage at room temperature for one week was 14.40 MPa and the puncture strength was 8.13 MPa. Compared with the control, Structure, and make it wear-resistant, compressive, seismic and other physical properties were significantly enhanced.