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Synthesis and characterization of cellulose acetate naphthoate with good ultraviolet and chemical resistance

机译：具有良好的耐紫外线和耐化学腐蚀性能的萘甲酸醋酸纤维素的合成与表征

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摘要

Commercial cellulose diacetate with a degree of substitution (DS) of 2.45 was partly deacetylated to cellulose acetate (CA) with different DSs by acid-catalyzed hydrolysis and then reacted with 1-naphthoyl chloride (NpCl) to synthesize CA naphthoate (CANp). Fourier transform infrared and 1H-NMR were used to characterize the chemical structure of CANp. The DS of naphthoate moiety (DSCANp) could be varied from 0.18 to 0.98 by adjusting the molar ratio of –OH in CA unit to NpCl, the DS of CA (DSCA), and the reaction time and temperature. When DSCA was 2.01 and the molar ratio was 1:6, the maximum DSCANp of the product was achieved after a reaction at 80°C for 2 h. With the increase of DSCANp, the thermal stability decreased slightly whereas the anti-ultraviolet property was enhanced. Moreover, the obtained films containing CANp exhibited good ultraviolet resistance as well as chemical resistance.
机译：通过酸催化水解将具有2.45的取代度（DS）的市售双乙酸纤维素部分脱乙酰化为具有不同DS的乙酸纤维素（CA），然后与1-萘甲酰氯（NpCl）反应以合成CA萘甲酸酯（CANp）。使用傅立叶变换红外光谱和1H-NMR表征CANp的化学结构。可以通过调节CA单元中–OH与NpCl的摩尔比，CA的DS（DSCA）以及反应时间和温度，将萘甲酸酯部分的DSDS（DSCANp）从0.18更改为0.98。当DSCA为2.01且摩尔比为1：6时，在80℃反应2小时后，获得产物的最大DSCANp。随着DSCANp的增加，热稳定性略有下降，而抗紫外线性能增强。此外，所获得的含有CANp的膜表现出良好的耐紫外线性以及耐化学性。

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