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Effect of Attapulgite on the Structure and Properties of Cellulose Nanofibrils Composite Aerogel
Received:May 25, 2023  
DOI：10.11981/j.issn.1000-6842.2023.03.124
Key Words:nanocellulose;attapulgite;aerogel;reinforced material
Fund Project:陕西省自然科学基础研究项目（2019JM-485）；国家大学生创新创业培养计划（S202010708007）；陕西省造纸技术与专用纸开发重点实验室资助。
Author NameAffiliationPostcode
LIN Jiacheng* College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper， Key Laboratory of Paper-based Functional Materials of China National Light Industry， Key Laboratory of Auxiliary Chemistry & Technology For Chemical Industry of Ministry of Education， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
LIN Tao College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper， Key Laboratory of Paper-based Functional Materials of China National Light Industry， Key Laboratory of Auxiliary Chemistry & Technology For Chemical Industry of Ministry of Education， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
WEI Xiaoyao College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper， Key Laboratory of Paper-based Functional Materials of China National Light Industry， Key Laboratory of Auxiliary Chemistry & Technology For Chemical Industry of Ministry of Education， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
LU Lulu College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper， Key Laboratory of Paper-based Functional Materials of China National Light Industry， Key Laboratory of Auxiliary Chemistry & Technology For Chemical Industry of Ministry of Education， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
LIU Feiya College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper， Key Laboratory of Paper-based Functional Materials of China National Light Industry， Key Laboratory of Auxiliary Chemistry & Technology For Chemical Industry of Ministry of Education， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
YIN Xuefeng College of Bioresources Chemical and Materials Engineering， Shaanxi Province Key Laboratory of Papermaking Technology and Specialty Paper， Key Laboratory of Paper-based Functional Materials of China National Light Industry， Key Laboratory of Auxiliary Chemistry & Technology For Chemical Industry of Ministry of Education， National Demonstration Center for Experimental Light Chemistry Engineering Education， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
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Abstract:
      Using cellulose nanofibers （CNF） as raw material and attapulgite （ATP） as reinforcing material， CNF-ATP suspension with different ratios were prepared， and then CNF-ATP composite aerogels prepared by liquid nitrogen gradient freezing and freeze-drying. The effect of different amount of ATP on the structure of CNF-ATP aerogel was analyzed by means of infrared spectroscopy （FT-IR）， X-ray diffraction （XRD） and thermogravimetric analysis （TG）. The results showed that the Zeta potential of the precursor suspension of CNF-ATP was -31.20 mV， and the particle size distribution was mainly above 1000 nm. As the amount of ATP added increasing， the humidity and heat stability and strain resistance of the CNF-ATP composite aerogel were also significantly improved. The thermal decomposition temperature exceeded 305 ℃， and the humidity stability was maintained after 72 h of immersion in the solution. At the same time， the study found that when the mass ratio of CNF and ATP was 2∶1， the CNF-ATP composite aerogel had the best strain resistance and flexibility balance， and the deformation tolerance could be as high as 45%. The humidity and heat stability of the CNF-ATP composite aerogel at this ratio has also been improved to the greatest extent， and the distribution of ATP on the pore wall of the aerogel showed its good dispersion.
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