塑料降解测试中塑料混合物湿度的变化规律  

Moisture monitoring rule for plastic mixtures in plastic degradation tests

作　　者：郭志豪 冯涛[1] 李字义 王晶[1] 王冰[1] 王艺翰 曹博为 GUO Zhihao;FENG Tao;LI Ziyi;WANG Jing;WANG Bing;WANG Yihan;CAO Bowei(School of Artificial Intelligence,Beijing Technology and Business University,Beijing 100048,China;China National Centre for Quality Supervision&Test of Plastic Products(Beijing),Beijing 100048,China)

机构地区：[1]北京工商大学人工智能学院,北京100048 [2]国家塑料制品质量检验检测中心(北京),北京100048

出　　处：《中国塑料》2024年第3期94-100,共7页China Plastics

摘　　要：通过对比塑料混合物各组分湿度测量方法,以不破坏塑料混合物且测量结果原理上相对准确的干燥称重法为基础,结合GB/T 19277.1—2011的测试方法,设计了塑料混合物湿度的测量方案。结果表明,与常规的烘干称重法获得的塑料混合物测量的质量湿度差距在3%~5%之间,质量湿度达到9%左右就很难再进行快速变化;塑料混合物湿度变化过程具有常速率、减速率和残余3个阶段,使用Boltzmann函数能够较好地拟合出塑料混合物湿度变化的常速率与减速率阶段的变化趋势;按需补水更有利于需氧生物降解活动的进行,更符合国标对塑料需氧生物降解测试的要求;根据3种气体流量下塑料混合物水分质量散失变化曲线,得到了任意气体流量下的水分质量散失变化曲线计算方法。Through comparing the measurement methods of humidity for each component of plastic mixtures,a humidity testing scheme of plastic mixtures was designed based on a drying weighing method combined with the test method of GB/T 19277.1—2011.This method does not destroy plastic mixtures to obtain relatively accurate measurement results.The results indicated that the difference between the measured mass humidity of the plastic mixture obtained from the conven⁃tional drying weighing method was 3%~5%.It is difficult to make rapid changes in the mass humidity when the differ⁃ence reached around 9%.There is a three⁃stage humidity change process for plastic mixtures as follows:constant rate,deceleration rate,and residue.The Boltzmann function could fit the trend of constant rate and deceleration rate better in the humidity change stage of plastic mixtures.The on⁃demand water replenishment is more advantageous to the aerobic biodegradation activity,which is in better agreement with the requirements of the national standard for the aerobic biodeg⁃radation test of plastics.According to the change curves of moisture mass dissipation of plastic mixtures at three gas⁃flow rates,the calculation method of the change curves of moisture mass dissipation at arbitrary gas flow rates was obtained.

关 键 词：塑料 称重法 生物降解 工业堆肥 有机土壤 数据拟合 含水量 

分 类 号：TQ321[化学工程—合成树脂塑料工业]