US 12,436,144 B2
Method for evaluating reinforcement effect and efficiency of filler on natural rubber based on particle size of bound rubber particle formed by the filler and natural rubber latex
Yaqing Liu, Taiyuan (CN); Rongyao Tao, Taiyuan (CN); Wenqi Wang, Taiyuan (CN); and Guizhe Zhao, Taiyuan (CN)
Assigned to NORTH UNIVERSITY OF CHINA, Taiyuan (CN); and SHANXI ZHONGBEI NEW MATERIAL TECHNOLOGY CO., LTD., Taiyuan (CN)
Filed by NORTH UNIVERSITY OF CHINA, Taiyuan (CN); and SHANXI ZHONGBEI NEW MATERIAL TECHNOLOGY CO., LTD., Taiyuan (CN)
Filed on Jan. 17, 2025, as Appl. No. 19/028,108.
Application 19/028,108 is a continuation of application No. PCT/CN2024/078122, filed on Feb. 22, 2024.
Claims priority of application No. 202410169729.5 (CN), filed on Feb. 6, 2024.
Prior Publication US 2025/0172537 A1, May 29, 2025
Int. Cl. G01N 33/44 (2006.01); G01N 15/02 (2024.01)
CPC G01N 33/445 (2013.01) [G01N 15/02 (2013.01); G01N 2015/0277 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for screening a filler with a reinforcement effect on natural rubber based on a particle size of bound natural rubber particles formed by the filler and a natural rubber particle in a natural rubber latex, comprising:
(S1) mixing the natural rubber latex respectively with a plurality of to-be-tested fillers in a weight ratio of 100:5-0.1 to produce a plurality of mixtures, wherein the bound natural rubber particles are formed by an interaction between the natural rubber particle in the natural rubber latex and each of the plurality of to-be-tested fillers; and diluting the plurality of mixtures to obtain a plurality of first emulsions, respectively;
(S2) measuring an average particle size of the bound natural rubber particles in each of the plurality of first emulsions by using a particle size measurement instrument; measuring an average particle size of natural rubber particles in a second emulsion, wherein the second emulsion is a pure natural rubber latex emulsion, and the second emulsion is the same as the first emulsion in terms of a concentration of the natural rubber particles; and calculating a particle size ratio x according to x=d/d1, wherein d represents the average particle size of the bound natural rubber particles in each of the plurality of first emulsions, and d1 represents the average particle size of the natural rubber particles in the second emulsion;
(S3) evaluating a reinforcement effect of the plurality of to-be-tested fillers on natural rubber based on the particle size ratio, wherein when the particle size ratio x is equal to or larger than 1.14, the reinforcement effect of a corresponding to-be-tested filler on the natural rubber is determined to be strong; when the particle size ratio x ranges from 1 to 1.07, the reinforcement effect of the corresponding to-be-tested filler on the natural rubber is determined to be weak; and when the particle size ratio x is larger than 1.07 and less than 1.14, the reinforcement effect of the corresponding to-be-tested filler on the natural rubber is determined to be medium; and
screening a filler with the particle size ratio x equal to or larger than 1.14 from the plurality of to-be-tested fillers for compounding with the natural rubber latex to prepare a rubber composite.