Formulation and characterization of a plasma sterilized, pharmaceutical grade chitosan powder.

Formulation and characterization of a plasma sterilized, pharmaceutical grade chitosan powder.
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等离子体灭菌的医药级壳聚糖粉末的配方和表征。

DOI:
10.1016/j.carbpol.2016.03.003
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发表时间:
2016
影响因子:
11.2
通讯作者:
Kirsch,WolffM
Kirsch,WolffM
中科院分区:
化学1区
文献类型:
--
作者:
Crofton,AndrewR;Hudson,SamuelM;Howard,Kristy;Pender,Tyler;Abdelgawad,Abdelrahman;Wolski,Daniel;Kirsch,WolffM

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壳聚糖作为药用辅料具有巨大的潜力。采用低温球磨法和低温气流粉碎法对壳聚糖薄片进行超微粉碎,然后用氮气等离子体灭菌。通过激光衍射、扫描电子显微镜(SEM)、电导滴定、粘度计、干燥失重、FTIR和鲎试剂(LAL)测定对壳聚糖进行了表征。低温喷射研磨产生的平均粒径为16.05 μm,比低温球磨小44%。低温粉碎的壳聚糖表现出增加的吸湿性,但降低分子量和脱乙酰度(DD)。SEM成像显示高度不规则的形状。FTIR显示与降低的DD一致的变化和在1100 cm−1处的无法解释的偏移。等离子体处理的壳聚糖是无菌的,低压等离子体处理后<2.5 EU/g,大气压等离子体处理后<1.3 EU/g。等离子体处理降低了壳聚糖薄片和粉末的比浓粘度,对粉末的影响更大。总之,采用低温喷射研磨和等离子体灭菌生产了药用级无菌壳聚糖粉末。
Chitosan has great potential as a pharmaceutical excipient. In this study, chitosan flake was micronized using cryo-ball and cryo-jet milling and subsequently sterilized with nitrogen plasma. Micronized chitosan was characterized by laser diffraction, scanning electron microscopy (SEM), conductometric titration, viscometry, loss on drying, FTIR, and limulus amebocyte lysate (LAL) assays. Cryo-jet milling produced mean particle size of 16.05 μm, 44% smaller than cryo-ball milling. Cryomilled chitosan demonstrated increased hygroscopicity, but reduced molecular weight and degree of deacetylation (DD). SEM imaging showed highly irregular shapes. FTIR showed changes consistent with reduced DD and an unexplained shift at 1100 cm−1. Plasma treated chitosan was sterile with <2.5 EU/g after low-pressure plasma and <1.3 EU/g after atmospheric pressure plasma treatment. Plasma treatment decreased the reduced viscosity of chitosan flake and powder, with a greater effect on powder. In conclusion, pharmaceutical grade, sterile chitosan powder was produced with cryo-jet milling and plasma sterilization.
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