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Preparation of Nano TiO2 Composite Fluorescent Whitening Emulsion and Its Application in the Paper
Received:January 18, 2021  
DOI：10.11980/j.issn.0254-508X.2021.07.003
Key Words:high yield pulp  triazine amino stilbene fluorescent whitening agent  nano TiO2  whiteness  yellowing inhibition
Fund Project:国家自然科学基金项目（31670596）；陕西省轻化工助剂重点实验室开放基金（13SJ019）。
Author NameAffiliationPostcode
ZHANG Guanghua Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
WANG Zhe Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
GUO Mingyuan College of Chemistry and Materials Science， Weinan Normal University， Weinan， Shaanxi Province， 714099 714099
NI Meile Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
HAN Xiaoqian Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
TONG Xin Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
WANG Yanmeng Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
FENG Pengchao Shaanxi Key Lab of Chemical Additives for Industry， Shaanxi University of Science & Technology， Xi'an， Shaanxi Province， 710021 710021
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Abstract:A triazine amino stilbene fluorescent whitening monomer （FBs） was prepared by using 4，4-diamino-2，2-disulfonic acid stilbene （DSD acid） as the parent and cyanuric trichloride as the bridging agent. FBs， acrylamide， styrene and modified nano TiO2 were copolymerized to obtain nano TiO2 composite fluorescent whitening emulsion （FBs-TiO2）， which was used for paper surface coating. The results showed that FBs-TiO2 was successfully prepared and had better stability. The whiteness increased from 67.2% to 87.2%， the tensile strength was enhanced from 3.12 kN/m to 4.87 kN/m， the tearing strength was increased from 13.8 mN·m2/g to 17.4 mN·m2/g after FBs-TiO2 was coated on paper surface， the PC value decreased from 10.40 to 6.66 after 48 hours of UV aging. It was indicated that the FBs-TiO2 not only improved the whiteness of paper and inhibit the yellowing of paper， but also significantly enhanced the surface strength and mechanical properties of paper. It was a papermaking additive with positive performance.
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