当前位置: X-MOL 学术Korean J. Chem. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Preparation of eco-friendly wax-coated paper and its rheological and water-resistant characteristics
Korean Journal of Chemical Engineering ( IF 2.7 ) Pub Date : 2021-11-20 , DOI: 10.1007/s11814-021-0973-3
Eun Ju Lee 1 , Kwang-Hee Lim 1
Affiliation  

The blend (wax M) of crude by-product polyolefin wax (wax K) and a fractionated commercial paraffin wax (wax J) was suggested to replace the wax J as a coating agent for wax-coated papers. The rheological properties of waxes J, K, and M were examined and compared. The correlation between viscosity and shear rate applied on these waxes maintained at 90 oC and 130 oC was identified. In particular, this paper, for the first time, presented non-Newtonian shear thinning behavior of not only wax K but also its blend of wax M in terms of their viscosity affected by shear rate at an operating temperature below their melting temperature of higher-melting-temperature DSC endothermic peaks (HMTEPs). They showed non-Newtonian behavior, so-called shear thinning behavior, at 90 oC in the light of characteristics of both suspension systems and polymer systems. In addition, the profiles of viscosity at 130 oC of all the waxes versus the shear rate exhibited Newtonian fluid behavior. Wax J also showed the behavior of a dilatant fluid. Then, the physical properties including water vapor transmission rates (WVTR), surface roughness, and coated weights, of thin papers coated with waxes J (WJP), K (WKP), and M (WMP) were evaluated, characterized, and compared. As a result, WMP had an equivalent value to that of WJP or the lowest value among wax-coated papers in terms of WVTR. The surface roughness and the barrier property of WVTR were minimized and enhanced, respectively, by blending waxes J and K. The additional physical properties, including dynamic contact angles, surface tension, wet and dry tensile strength, optical examination of the wax-coated fiber structure, and antimicrobial properties of the wax-coated papers, were evaluated. The excellent antimicrobial properties of clinoptilolite added to wax J or wax M appeared.



中文翻译:

环保型涂蜡纸的制备及其流变和耐水特性

建议用粗副产品聚烯烃蜡(蜡 K)和分馏的商业石蜡(蜡 J)的混合物(蜡 M)代替蜡 J 作为涂蜡纸的涂层剂。检查并比较了蜡 J、K 和 M 的流变特性。确定了粘度和施加在这些蜡上的剪切速率之间的相关性,这些蜡保持在 90 o C 和 130 o C。特别是,本文首次展示了蜡 K 和蜡 M 混合物的非牛顿剪切稀化行为,它们的粘度受剪切速率的影响,操作温度低于其较高的熔化温度 -熔融温度 DSC 吸热峰 (HMTEP)。他们表现出非牛顿行为,即所谓的剪切稀化行为,在 90 oC 根据悬浮系统和聚合物系统的特性。此外,在 130 o 时的粘度曲线所有蜡的 C 与剪切速率的关系都表现出牛顿流体行为。蜡 J 还显示了膨胀流体的行为。然后,评估、表征和比较涂有蜡 J (WJP)、K (WKP) 和 M (WMP) 的薄纸的物理性能,包括水蒸气透过率 (WVTR)、表面粗糙度和涂层重量。因此,就 WVTR 而言,WMP 具有与 WJP 相当的值或蜡涂层纸中最低的值。通过混合蜡 J 和 K,WVTR 的表面粗糙度和阻隔性能分别被最小化和增强。 额外的物理性能,包括动态接触角、表面张力、湿和干拉伸强度、蜡涂层纤维的光学检查对涂蜡纸的结构和抗菌性能进行了评估。

更新日期:2021-11-20
down
wechat
bug