Kwaśniewska Anita, Świetlicki Michał, Prószyński Adam, Gładyszewski Grzegorz
Department of Applied Physics, Lublin University of Technology, 20-618 Lublin, Poland.
Polymers (Basel). 2021 Jan 12;13(2):244. doi: 10.3390/polym13020244.
Starch films modified with additives are materials increasingly being used in the production of packaging. These types of biopolymers can, to a considerable degree, replace plastic, contributing to the reduction in both production and waste management costs. However, they should be characterised by specific mechanical and surface parameters which determine their application. In the presented work, the PeakForce Quantitative Nanomechanics Mapping (PFQNM) method was applied to analyse a starch-based biopolymer modified with two different kaolin clay contents (5% and 10%). The technique used facilitates the assessment of the correlation of Atomic Force Microscope AFM height parameters with nanomechanical ones which provide the definitions of mutual interactions and allow the possibility to analyse materials in respect of various details. The investigated material was mapped in the Derjaguin-Muller-Toporov (DMT) modulus, adhesion and height domains. The results obtained indicated the impact of additives on the determined parameters. Increases in the DMT modulus and the adhesion force, along with the kaolin content, were observed. The enhancement of starch films with kaolin clay also induced growth in the surface roughness parameters.
用添加剂改性的淀粉薄膜是包装生产中越来越常用的材料。这类生物聚合物在很大程度上可以替代塑料，有助于降低生产成本和废物管理成本。然而，它们应具有决定其应用的特定机械和表面参数。在本研究中，采用峰值力定量纳米力学映射（PFQNM）方法分析了两种不同高岭土含量（5%和10%）改性的淀粉基生物聚合物。所使用的技术有助于评估原子力显微镜（AFM）高度参数与纳米力学参数之间的相关性，这些参数提供了相互作用的定义，并允许从各种细节方面分析材料。在德亚金-穆勒-托波罗夫（DMT）模量、粘附力和高度域中对研究材料进行了映射。所得结果表明添加剂对所测定参数的影响。观察到DMT模量和粘附力随着高岭土含量的增加而增加。用高岭土对淀粉薄膜进行增强也导致表面粗糙度参数增加。
