复合保存超低氨浓缩天然胶乳贮存性能及胶膜性能的研究

赵立广; 邢鹏; 宋亚忠; 李建伟; 黄红海; 王岳坤; 辛振祥; 桂红星

doi:10.11777/j.issn1000-3304.2025.25039

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复合保存超低氨浓缩天然胶乳贮存性能及胶膜性能的研究

研究论文 | 更新时间：2025-09-28

- 复合保存超低氨浓缩天然胶乳贮存性能及胶膜性能的研究
- A Compound Preservation System for Improving Storage Stability and Film Quality of Ultra-low Ammonia Natural Rubber Latex
- 高分子学报 2025年56卷第10期页码：1850-1861
- 作者机构：
  
  1.中国热带农业科学院橡胶研究所海南省天然橡胶技术创新中心海口 571101
  2.青岛科技大学高分子科学与工程学院青岛 266061
  3.海南天然橡胶与热带林木研究院海南省高性能天然橡胶材料工程重点实验室海口 571101
- 作者简介：
  
  E-mail: guihongxing@catas.cn
- 基金信息：
  
  国家重点研发计划项目课题(2022YFD2301201);海南省重点研发专项(ZDYF2024XDNY284);现代农业产业技术体系建设专项(CARS-33-GJ1)
- DOI：10.11777/j.issn1000-3304.2025.25039
  中图分类号：
- CSTR：32057.14.GFZXB.2025.7405
- 收稿日期：2025-04-17，
  
  录用日期：2025-05-08，
  
  网络出版日期：2025-08-01，
  
  纸质出版日期：2025-10-20
- 稿件说明：
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赵立广, 邢鹏, 宋亚忠, 李建伟, 黄红海, 王岳坤, 辛振祥, 桂红星. 复合保存超低氨浓缩天然胶乳贮存性能及胶膜性能的研究. 高分子学报, 2025, 56(10), 1850-1861

Zhao, L. G.; Xing, P.; Song, Y. Z.; Li, J. W.; Huang, H. H.; Wang, Y. K.; Xin, Z. X.; Gui, H. X. A compound preservation system for improving storage stability and film quality of ultra-low ammonia natural rubber latex. Acta Polymerica Sinica, 2025, 56(10), 1850-1861
赵立广, 邢鹏, 宋亚忠, 李建伟, 黄红海, 王岳坤, 辛振祥, 桂红星. 复合保存超低氨浓缩天然胶乳贮存性能及胶膜性能的研究. 高分子学报, 2025, 56(10), 1850-1861 DOI： 10.11777/j.issn1000-3304.2025.25039. CSTR： 32057.14.GFZXB.2025.7405.

Zhao, L. G.; Xing, P.; Song, Y. Z.; Li, J. W.; Huang, H. H.; Wang, Y. K.; Xin, Z. X.; Gui, H. X. A compound preservation system for improving storage stability and film quality of ultra-low ammonia natural rubber latex. Acta Polymerica Sinica, 2025, 56(10), 1850-1861 DOI： 10.11777/j.issn1000-3304.2025.25039. CSTR： 32057.14.GFZXB.2025.7405.

摘要

超低氨浓缩天然胶乳具有很高的环保性和应用前景，但在长期储存中稳定性较差. 本研究采用提高月桂酸用量、与氢氧化钾(KOH)复配以及与二硫化四甲基秋兰姆/氧化锌(TZ)复配3种方法来提升硫酮衍生物(TD)复合保存超低氨浓缩胶乳的稳定性. 3种处理方法均能降低浓缩胶乳橡胶粒子粒径，提升保存效果. 其中，提高月桂酸用量效果最佳，机械稳定度>1200 s；其次是与KOH复配(>1000 s)；同时2种方法能提升预硫化胶乳机械稳定性并降低黏度；但提高月桂酸用量会降低硫化速度，同时降低干胶膜和硫化胶膜物理力学性能；与KOH复配会降低干胶膜强度，但能显著提升硫化胶膜力学性能. 此外，3种处理均提高了干胶膜数均分子量，红外曲线和热稳定性无显著变化. 和KOH复配超低氨浓缩胶乳综合性能最好；其次是提高月桂酸用量，但需要调整硫化体系提升硫化速度. 研究表明，通过调整保存体系，在不牺牲胶膜性能的前提下，可以大幅提高超低氨浓缩天然胶乳的稳定性.

Abstract

Ultra-low ammonia concentrated natural rubber latex (CNRL) has attracted considerable attention owing to its environmental benefits and extensive application potential. Nevertheless

inadequate storage stability of CNRL remains a significant limitation. In this study

three preservation strategies for thioketone derivative (TD)-stabilized ultra-low ammonia CNRL were investigated: (1) optimization of lauric acid (LA) concentration

(2) incorporation of potassium hydroxide (KOH)

and (3) tetramethylthiuram disulfide/zinc oxide (TZ). All methodologies demonstrated effectiveness in reducing rubber particle size and enhancing preservation performance. Notably

an increase in LA concentration emerged as the most effective intervention

achieving a mechanical stability time (MST) exceeding 1200 s. KOH supplementation alone achieved an MST of >1000 s. However

these strategies exhibited differential effects on material properties; increased LA content delayed vulcanization kinetics and compromised the tensile strength of both dry and vulcanized films

whereas KOH addition enhanced the mechanical properties of vulcanized films despite reducing the dry film strength. Both LA enrichment and KOH incorporation substantially improved the stability of the prevulcanized latex

reducing the viscosity by 15%-20% while maintaining colloidal stability. All treatments increased the number-average molecular weight of the dry films without altering their infrared spectral characteristics or thermal decomposition profiles. The KOH incorporation ultra-low ammonia CNRL exhibited the most favorable overall performance. This was followed by an increase in the amount of LA; however

it was necessary to adjust the vulcanization system to enhance the vulcanization speed. This study demonstrates that strategic modifications to preservation systems can effectively address the stability limitations of ultra-low ammonia CNRL while preserving the essential rubber film properties. These findings provide practical guidance for the development of high-performance

environmentally friendly CNRL products.

关键词

Keywords

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