共查询到18条相似文献,搜索用时 78 毫秒
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控制释放技术虽然是膜科学中一个尚未成熟的研究领域,但在农业、食品工业和医药业中已有非常广泛的应用.使用了控制释放技术的化肥可以防止养分流失,还可以根据作物的生理需求特点逐渐适量的释放养分;食品使用控制释放可以防止由于较长的生产时间而造成维生素和矿物质的损失等现象,从而保证了食品的味道和营养成分;医药中使用控制释放可以减少用药次数,提高药物利用率.目前,"智能控制释放系统"是控制释放发展的前沿,具有这种特点控释系统对外界的某一个或几个因素的变化有很高的敏感度,根据环境的变化达到自动释放和自动停止释放的目的. 相似文献
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控制释放技术发展及展望 总被引:16,自引:0,他引:16
本文总结了控制释放技术与一般方法相比所具有的优缺点,并把控制放的方法分为物理法和化学法两大类,详细地介绍了种种不同类型的优缺点,释放机理,制备方法,及影响释放的因素等,并对控制释放技术的研究方向和应用前景提出了自己的看法。 相似文献
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包覆技术及其控制释放系统的研究与开发 总被引:7,自引:0,他引:7
本文全面概述了近年来在三类包覆与控制释放系统(微囊技术、脂质体及多孔聚合物系统)中的技术发展与应用方面的情况,对三类系统进行了详细的的技术性能,进一步阐述了选择适宜的控制释放系统的原则。 相似文献
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日化香精控制释放技术及其应用 总被引:2,自引:0,他引:2
日化香精的控制释放,对于有效地发挥其功能是十分重要的。 控制释放技术有很多方法,例如:微包囊法,环糊精法,薄膜法,凝胶法,乳化法等。 本文就近期有关日化香精控制释放技术及其在芳香织物、芳香合成纤维、芳香涂料、芳香塑料、空气清新剂等方面的应用作一综述。 相似文献
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Wei Qiang 《Drying Technology》2018,36(11):1342-1348
In this study, uniform microparticles were prepared using the highly efficient microfluidic spray drying technology, and then a flexible controlled release mixed-unit microparticle system was developed to meet various needs. A mathematical drug release model of the mixed system was established and two mixed formulations were used to testify the predictive ability when initial parameters were given. Results have proved that the proposed model could precisely predict the release rate of tested samples. In conclusion, the novel system for controlled release may provide a new option for modified release drugs and may have a good prospect in the industrial application. 相似文献
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Controlled release technology is a recent technology which has considerable potential in the fields of medicine, pharmacy, and agriculture. Fluoride ion is commonly used in the preventive treatment of decay, and when provided with extra fluoride, children living in regions that lack fluoride benefit from it. For the present study, clinical properties of an intraoral controlled release fluoride delivery system were considered. The preparation of a controlled release membrane system is described. Polyhydroxyethylmethacrylate/polyhydroxybutyrate composite systems were examined as fluoride carriers. Polymeric membranes were prepared by photopolymerization and then characterized. Contact angles and swelling ratios of fluoride‐loaded membranes were determined. The surface morphology of the microporous membranes were examined by using scanning electron microscopy (SEM). In vitro fluoride release studies were carried out in an artificial saliva medium. The amount of released fluoride was determined and the effect of medium pH and temperature on fluoride release was investigated. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 976–981, 2003 相似文献
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农药的长期低效使用增加了农业生产成本,造成大量农药流失,威胁食品安全与生态环境。利用农药缓控释技术对现有农药剂型进行改进是提高农药利用率的有效措施。刺激响应聚合物作为新兴载体,可以感受周边环境变化,从而响应并靶向控制释放有效成分。在医药领域,这类材料作为药物运载体的研究已相当广泛,在癌症的靶向治疗方面更是颇具成效。在农药控释领域的相关应用则处于基础研究阶段,仍然有一系列的因素限制着这类材料在农药控释领域的发展,比如载体成本、药物负载性能、体系稳定性、加工工艺的普适性及应用等。本文综述了刺激响应性聚合物应用于农药控释领域的研发现状,并对该类农药控释剂的应用前景进行了展望。 相似文献
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