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首页> 外文期刊>Fibers and Polymers >Preparation of Degradable Oxidized Regenerated Cellulose Gauze by Zinc Modification on HNO3/Cu Oxidized Viscose Fibers
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Preparation of Degradable Oxidized Regenerated Cellulose Gauze by Zinc Modification on HNO3/Cu Oxidized Viscose Fibers

机译：用锌改性在HNO3 / Cu氧化粘胶纤维上的锌改性可降解氧化再生纤维素纱布的制备

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摘要

In the present research, the oxidized regenerated cellulose (ORC), type viscose, was obtained by selective oxidation system, HNO3-Cu. Oxidizing parameters- acid concentration, reaction time and Cu content- were optimized through the central composite design (CCD) to obtain high yield of carboxyl content. The optimum oxidation conditions were as follows: time 30 h, acid concentration 46 % and Cu content 2.5 (g), in which the carboxyl value was 16.02 +/- 0.25 %. Optimal oxidized regenerated cellulose was characterized using FTIR, XRD, TG/DTA, SEM and EDX. For the next stage, a zinc modified oxidized regenerated cellulose gauze (ORC-Zn) was prepared by oxidation of viscose with HNO3/Cu system in optimal conditions and, finally, ion modification with a ZnCl solution. In vitro sedimentation studies demonstrated that the ORC-Zn sample reduced the erythrocyte sedimentation rate (ESR) by 36 % as compared to the control, whereas the commercial ORC reduced ESR by 20 %. In addition, degradability and antibacterial properties of ORC-Zn gauze have been greatly improved compared to ORC one.
机译：在本研究中，通过选择性氧化系统，HNO3-Cu获得氧化再生纤维素（ORC），粘胶。通过中央复合设计（CCD）优化氧化参数 - 酸浓度，反应时间和Cu含量，得到高产羧基含量的高产率。最佳氧化条件如下：时间30小时，酸浓度46％和Cu含量2.5（g），其中羧基值为16.02 +/- 0.25％。使用FTIR，XRD，Tg / DTA，SEM和EDX进行最佳氧化再生纤维素。对于下一阶段，通过在最佳条件下用HNO 3 / Cu系统氧化粘胶制备改性氧化再生纤维素纱布（ORC-Zn），最后，用ZnCl溶液离子修饰。体外沉淀研究证明，与对照相比，逆锌样品将红细胞沉降率（ESR）降低36％，而商业兽人将ESR降低20％。另外，与ORC相比，orc-Zn纱布的可降解性和抗菌性质得到了大大提高。

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