Nanomechanical Mapping of Green and Vulcanized Natural Rubber Latex Film by AFM PeakForce QNM: Impact of Proteins and Lipids Contents on Film Quality

IF 4.1 2区 化学 Q2 POLYMER SCIENCE
Narueporn Payungwong, Haonan Liu, Jinrong Wu, Ken Nakajima, Chee Cheong Ho, Jitladda Sakdapipanich
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引用次数: 0

Abstract

Soft polymeric films from natural rubber (NR) latex are crucial for applications requiring exceptional mechanical properties, such as medical gloves. It is known that pre-vulcanization, film formation, and post-vulcanization are three important steps in the manufacturing process of thin latex films that control the quality of the final film products This study investigates the pivotal role of pre-vulcanization in latex film formation, with a specific emphasis on the inhibitory effects of proteins and lipids on particle coalescence during the film formation process. Using atomic force microscopy (AFM) in PeakForce Quantitative Nanomechanics (QNM) mode, we provide experimental evidence that residual non-rubber components (NRCs), particularly proteins and lipids, form a stabilizing layer around latex particles that impedes rubber chain diffusion and particle coalescence. These effects contribute to surface roughness in unvulcanized latex films and hinder the formation of a smooth, uniform film. Pre-vulcanization facilitates network formation within latex particles, improving chain mobility and enabling smoother film formation. Nanomechanical mapping reveals that reducing NRC content enhances film uniformity and mechanical strength by promoting rubber chain diffusion and cross-linking. These findings underscore the critical balance between NRC levels and pre-vulcanization in optimizing latex-dipped product quality, offering new insights into the nanomechanical properties governing latex film formation and performance.

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来源期刊
Polymer
Polymer 化学-高分子科学
CiteScore
7.90
自引率
8.70%
发文量
959
审稿时长
32 days
期刊介绍: Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.
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