Colloidal properties of deproteinised natural rubber latex

IF 1.4 4区化学 Q4 POLYMER SCIENCE

Journal of Rubber Research Pub Date : 2026-03-05 DOI:10.1007/s42464-026-00346-5

Roslim Ramli, Asrul Mustafa, Shamsul Kamaruddin, Mohamad Akmal Abdul Rahim, Ruslimie Che Ali, Siti Shuhada Shuib, Mohamad Khairul Akmal Amran, Muhammad Afiq Misri, Sajit Anandevan Sunderasan, Fatimah Rubaizah Mohd Rasdi

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Abstract

This study evaluates the effectiveness of producing deproteinised natural rubber (DPNR) latex from fresh field latex and commercial low-ammonia (LATZ) latex through enzymatic treatments at room temperature and heat-assisted methods, combined with two concentration processes: centrifugation and membrane separation. The study showed that both room temperature and heat-assisted treatments, in combination with either centrifugation or membrane separation, effectively removed proteins, thereby enhancing the purity of the latex. The physicochemical properties of all types of DPNR latex were evaluated, showing total solid content ranging from 61 to 63%, dry rubber content between 60 and 62%, alkalinity from 0.60 to 0.67%, viscosity between 80 and 120 cP, and volatile fatty acid levels from 0.02 to 0.06%. Rheological studies indicated that DPNR latex exhibits shear-thinning behaviour, with lower viscosity at higher shear rates. Viscoelastic evaluations revealed that DPNR latex exhibited predominantly viscous behaviour, with reduced elasticity at higher strain levels. These properties suggest that DPNR latex is comparable to commercial LATZ latex. However, further optimization is needed to enhance the mechanical stability time of the latex for industrial applications.

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脱蛋白天然胶乳的胶体特性

本研究通过室温和热辅助方法，结合离心和膜分离两种浓缩工艺，对新鲜乳胶和商业低氨（LATZ）乳胶进行酶处理，以生产脱蛋白天然橡胶（DPNR）乳胶的有效性进行了评估。研究表明，室温和热辅助处理，结合离心或膜分离，都能有效地去除蛋白质，从而提高乳胶的纯度。对各类型DPNR胶乳的理化性能进行了评价，其总固含量为61 ~ 63%，干胶含量为60 ~ 62%，碱度为0.60 ~ 0.67%，粘度为80 ~ 120cp，挥发性脂肪酸含量为0.02 ~ 0.06%。流变学研究表明，DPNR胶乳具有剪切减薄的特性，在较高的剪切速率下具有较低的粘度。粘弹性评价显示DPNR胶乳主要表现为粘性行为，在较高应变水平下弹性降低。这些性能表明DPNR乳胶可与商业LATZ乳胶相媲美。然而，为了提高乳胶在工业应用中的机械稳定时间，还需要进一步优化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Rubber Research 化学-高分子科学

自引率

15.40%

发文量

审稿时长

3 months

期刊介绍： The Journal of Rubber Research is devoted to both natural and synthetic rubbers, as well as to related disciplines. The scope of the journal encompasses all aspects of rubber from the core disciplines of biology, physics and chemistry, as well as economics. As a specialised field, rubber science includes within its niche a vast potential of innovative and value-added research areas yet to be explored. This peer reviewed publication focuses on the results of active experimental research and authoritative reviews on all aspects of rubber science. The Journal of Rubber Research welcomes research on: the upstream, including crop management, crop improvement and protection, and biotechnology; the midstream, including processing and effluent management; the downstream, including rubber engineering and product design, advanced rubber technology, latex science and technology, and chemistry and materials exploratory; economics, including the economics of rubber production, consumption, and market analysis. The Journal of Rubber Research serves to build a collective knowledge base while communicating information and validating the quality of research within the discipline, and bringing together work from experts in rubber science and related disciplines. Scientists in both academia and industry involved in researching and working with all aspects of rubber will find this journal to be both source of information and a gateway for their own publications.