Green Preparation and Properties of Polyacrylamide-grafted Modified Cellulose Nanocrystals in an Aqueous Non-strong Acid System

WANG Jia-qi; HAN Jin-cheng; ZHONG Ze-wen; WANG Hui

doi:10.14028/j.cnki.1003-3726.2026.26.080

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Green Preparation and Properties of Polyacrylamide-grafted Modified Cellulose Nanocrystals in an Aqueous Non-strong Acid System

更新时间：2026-07-27

- Green Preparation and Properties of Polyacrylamide-grafted Modified Cellulose Nanocrystals in an Aqueous Non-strong Acid System
- Polymer Bulletin Vol. 39, Issue 8, Pages: 1390-1402(2026)
- 作者机构：
  
  青岛科技大学高分子科学与工程学院　青岛 266042
  青岛科技大学中德工程学院　青岛 266042
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2026.26.080
  CLC：
- Received：22 February 2026，
  
  Accepted：23 March 2026，
  
  Online First：13 July 2026，
  
  Published：20 August 2026
- 稿件说明：
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王家琪, 韩锦程, 种泽文, 王辉. 水相非强酸体系中聚丙烯酰胺接枝改性纤维素纳米晶的绿色制备及性能. 高分子通报, 2026, 39(8), 1390–1402.

Wang, J. Q.; Han, J. C.; Zhong, Z. W.; Wang, H. Green preparation and properties of polyacrylamide-grafted modified cellulose nanocrystals in an aqueous non-strong acid system. Polym. Bull. (in Chinese), 2026, 39(8), 1390–1402.
王家琪, 韩锦程, 种泽文, 王辉. 水相非强酸体系中聚丙烯酰胺接枝改性纤维素纳米晶的绿色制备及性能. 高分子通报, 2026, 39(8), 1390–1402. DOI： 10.14028/j.cnki.1003-3726.2026.26.080.

Wang, J. Q.; Han, J. C.; Zhong, Z. W.; Wang, H. Green preparation and properties of polyacrylamide-grafted modified cellulose nanocrystals in an aqueous non-strong acid system. Polym. Bull. (in Chinese), 2026, 39(8), 1390–1402. DOI： 10.14028/j.cnki.1003-3726.2026.26.080.

摘要

为突破硝酸铈铵(CAN)引发纤维素纳米晶(CNC)表面接枝聚合对强酸性环境的依赖，解决传统工艺

的环境问题，开发了一种水相非强酸体系下CNC接枝聚丙烯酰胺(PAM)的绿色制备方法。以商用CNC为原料，经球磨–超声协同预处理实现CNC纳米级分散；采用水相一锅法，以CAN为引发剂在无强酸条件下实现PAM在CNC表面的接枝聚合，制得CNC-PAM复合材料；通过傅里叶变换红外光谱、透射电子显微镜、Zeta电位测试等表征接枝产物结构，利用动态光散射、流变学测试分析其分散性与流变性能。研究结果表明，PAM成功接枝于CNC表面形成核壳结构，当AM/CNC质量比达10/1时，PAM接枝率达(135.7±7.2)%；CNC-PAM产物仍能保持纳米级分散，在水相中分散性良好，平均粒径71 nm；流变性能优异，质量分数为1%的CNC-PAM (

(AM)/

(CNC)=10/1)水溶液黏度可达1136.3 mPa·s，同时兼具热稳定性与耐盐性，增稠性能优异。本研究在水相非强酸体系中实现CAN引发的CNC-PAM高效接枝制备，工艺环境友好，操作简便，制备的CNC-PAM复合材料可作为潜在的绿色驱油剂，为聚合物接枝CNC的绿色工业化生产提供了新路径，也为油田化学品的绿色化升级提供了材料与技术支撑。

Abstract

To overcome the strong dependence of ceric ammonium nitrate (CAN)-initiated surface graft polymerization of cellulose nanocrystals (CNC) on highly acidic environments and address the environmental issues associated with conventional processes

this study developed a green preparation method for CNC-grafted polyacrylamide (PAM) in an aqueous non-strong acid system. Using commercially available CNC as raw material

nanoscale dispersion of CNC was achieved through ball milling-ultrasonic synergistic pretreatment. A one-pot aqueous method was adopted

employing CAN as an initiator to accomplish PAM graft polymerization on the CNC surface under mild acidic conditions

yielding CNC-PAM composite materials. The structure of the grafted product was characterized using Fourier transform infrared spectroscopy

transmission electron microscopy

and zeta potential measurements

while its dispersibility and rheological properties were analyzed using dynamic light scattering and rheological tests. The results indicate that PAM was successfully grafted onto the CNC surface

forming a core-shell structure. When the AM/CNC mass ratio reached 10:1

the PAM grafting ratio was (135.7±7.2)%. The CNC-PAM product maintained a nanoscale dispersion with good dispersibility in aqueous media

exhibiting an average particle size of 71 nm. It demonstrated excellent rheological properties

with a viscosity of 1136.3 mPa·s for a 1% CNC-PAM (

(AM)/

(CNC)=10/1) aqueous solution

alongside notable thermal stability

salt tolerance

and superior thickening performance. This study represents the first successful implementation of CAN-initiated efficient grafting of PAM onto CNC in an aqueous system with a weak acid. This process is environmentally friendly and operationally straightforward. The prepared CNC-PAM composite holds potential as a green oil-displacing agent

offering a novel pathway for the green industrial production of polymer-grafted CNCs and providing both material and technical support for the eco-friendly upgrading of oilfield chemicals.

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