CAJ | 학술논문

为了研究低溶解度酚醛树脂在水中的分散特性及分散稳定性，测定了低溶解度酚醛树脂分子聚集体的流体力学直径、Zeta电位及体系的浊度。结果表明：在去离子水中，低溶解度酚醛树脂以分子或聚集度较小的分子聚集体存在，Zeta电位较高，体系浊度较小，体系稳定；加入NaCl时，低溶解度酚醛树脂形成较大的分子聚集体， Zeta电位降低，体系浊度增大，稳定性变差；加入HCl时，低溶解度酚醛树脂分子或聚集体负电荷密度减少，Zeta电位降低，体系稳定性下降；加入NaOH时，低溶解度酚醛树脂分子或聚集体负电荷增加，分子间的静电斥力增强，体系的稳定性增加。
위료연구저용해도분철수지재수중적분산특성급분산은정성，측정료저용해도분철수지분자취집체적류체역학직경、Zeta전위급체계적탁도。결과표명：재거리자수중，저용해도분철수지이분자혹취집도교소적분자취집체존재，Zeta전위교고，체계탁도교소，체계은정；가입NaCl시，저용해도분철수지형성교대적분자취집체， Zeta전위강저，체계탁도증대，은정성변차；가입HCl시，저용해도분철수지분자혹취집체부전하밀도감소，Zeta전위강저，체계은정성하강；가입NaOH시，저용해도분철수지분자혹취집체부전하증가，분자간적정전척력증강，체계적은정성증가。
The hydrodynamic diameter and Zeta potential of low-solubility phenol-formaldehyde resin (LPFR) molecule aggregates and the turbidity of LPFR dispersion were measured to study the dispersion property and stability of LPFR in water. The results show that LPFR molecules are in the form of mono-molecules or small molecule aggregates in deionized water. The Zeta potential of mono-molecules or small molecule aggregates is high and the turbidity of the LPFR dispersion is low. The LPFR dispersion is stable. When adding NaCl to the LPFR dispersion, large molecule aggregates of LPFR molecules with low Zeta potential are formed. The turbidity of the LPFR dispersion increases and the stability of the LPFR dispersion decreases. When adding HCl to the LPFR dispersion, the negative charge density and the Zeta potential of LPFR molecules or aggregates are decreased, and the stability of the LPFR dispersion is reduced. When adding NaOH to the LPFR dispersion, the negative charge density of LPFR molecules or aggregates rises, electrostatic repel force between molecules is enhanced and the stability of the LPFR dispersion is improved.