微胶囊化学制备方法简述

正微胶囊是具有半透性或密封性的微小粒子,作为一种高聚物壁壳的微型容器或包装物,中间被包裹的称为芯材,包裹物质称为壁材[1]。微胶囊技术最成功应该是在压感复写纸上,这种复写纸是能通过笔尖对复写纸施加压力而得到复制品的复写纸,其化学原理就是纸的背面还有一种表面无色,但其芯材为即将使用并且释放的染料的微胶囊,当有人在纸上用     

无碳复写纸CB涂料的研制

制备无碳复写纸ＣＢ涂料的关键是如何制备包封压敏染料的微胶囊，以前常用凝聚法或界面聚合法。近来，原位聚合法已显示出其优越性，本文通过聚合物交联，成功地制得适于无碳复写纸的微胶囊，方法简便，原料易得、价廉。     

无碳复写纸用CB涂料的反应条件研究

采用原位聚合法制备包封压敏染料的微胶囊，并加稳定剂制得无碳复写纸用CB涂料。介绍了CB涂料的制法。讨论了诸种反应条件对微胶囊的影响，以制得微细、均匀的微胶囊（粒径5－10μm）。     

微胶囊化技术及其工业应用

微胶囊化技术近年来获得迅速发展。微胶囊系由芯物质和囊壁材料组成的大小为1至1,000微米的微小粒子。微胶囊技术最适用于制作无碳复写纸、医药、液晶显示器及胶粘剂等。本文介绍了微胶囊的技术方法,重点叙述了凝聚法和界面缩聚法的工艺过程,并分析了影响微胶囊性质的一些因素。     

微胶囊技术在农药中应用研究进展

正微胶囊技术的研究起源于20世纪30年代。1954年美国NCR(National Cash Register)公司的B.K.Green成功地运用相分离技术制备明胶微胶囊,并将该技术应用于无碳复写纸的生产。经过几十年的发展,该技术日臻成熟,目前已在诸     

聚苯乙烯和乙基纤维素微胶囊的制备

一般高分子微胶囊是指用高分子物质包裹着的直径由数微米到数百微米的微小颗粒体系。微胶囊技术,在日常生活中已应用于无碳复写纸和计算机打字纸方面。本文介绍的是聚苯乙烯和乙基纤维素的微胶囊制备方法。胶囊内外均是水相,胶囊是如球壳状的高分子物质,即内水相/球壳/外水相的构造。     

微胶囊包覆杀虫剂概述

微胶囊包覆杀虫剂概述吕建平沙宗琳（安徽省化工研究院，合肥２３００４１）（合肥市第３４中，２３００３１）１前言微胶囊化是一种化学品的特种“包装”技术。五十年代初首次被应用于无碳复写纸，现已广泛用于医药、农药、香精、食品、化妆品等领域。该技术在农药杀虫剂...     

苯乙烯——马来酸酐共聚物的合成及应用

本实验采用沉淀聚合的方法，合成甲醇酯化的交替型乙烯－马来酸酐共聚物，经在合成无碳复写纸用微胶囊方面的应用表明，该共聚物的碱水溶液具有较好的乳化分散稳定效果。     

明胶乳液在微胶囊形成中的作用

<正> 随着微胶囊技术的发展,微胶囊已成功地应用于食品、医药、农药、染料、饲料、香料、感光材料、牙膏、油墨、烫发剂等日用化妆品工业及其它工业。虽然胶囊生产已有150年的历史,但微胶囊的生产和应用乃是20世纪50年代才开始的。利用明胶的乳化性能和悬浮性能,把不溶于水的液体或固体在明胶液中搅成乳状体,每个微小颗粒都被明胶层所包围而形成微胶囊,直径由几微米至几十微米。美国 NCR公司(National Cash Rister)首先将微胶囊成功地应用于复写纸上,即使染料微胶囊化,涂布于纸上,囊芯可以通过钢笔的压力压破微胶囊或加热使胶囊破裂,从而显出字迹,这是微胶囊最早的应用。     

引入一种新的方法制备农药微胶囊

<正>20世纪50年代B.K.green在研究第一代无碳复写纸时使用凝聚法制备了包含染料的微胶囊,这标志着微胶囊技术的开始。进入21世纪,微胶囊技术的研究进展加快,已被广泛的用于医药、食品、化妆品、建材等很多领域,微胶囊是以高分子材料作为囊壁或囊膜,通过物理化学或物理化学方法将作为囊芯的活性物质(固体液体或气体)包裹起来,形成一种具有半渗透性囊膜的微型胶囊。其具有保护囊芯材料免受环境影响、屏蔽气味降低毒性等作用。上世纪六十年代大量化     

Microcapsules application in graphic arts industry: a review on the state-of-the-art

The process of oil-containing microcapsules production by complex coacervation of gelatine and gum arabic was patented in 1957. Microencapsulation technology gained importance in production of carbonless copy paper as one of the most important commercial products. Development of this technology in later years led to the emergence of different types of microcapsules and the production procedures for various application fields. Nowadays, they are mainly used in medicine, pharmacy, agriculture, construction industry, chemical industry, food industry, biotechnology, cosmetic industry, photography, electronics, textiles and printing industry. This review paper highlights the major types of microcapsules and their applications in production techniques in graphic arts and printing industry, various processing parameters that affect their important characteristics and methods for microcapsules characterization. This paper discusses the applications of microcapsules within printing industry, and feasible printing technologies related to the desired substrate materials. The analysis of these subjects offers a deeper insight into the mechanisms of microcapsule transfer processes, their behavior, and working conditions leading to the final products. It reveals the advantages and the drawbacks of certain printing technologies for microcapsules transfer, which enables the determination of favorable transfer procedure for specific microcapsule type and substrate materials. This paper also provides valuable recommendations and potential solutions on how to overcome the obstacles created by certain printing technologies.     

二异丙基萘—生产无碳复写纸的新溶剂

无碳复写纸现已风行世界。二异丙基茶具有无色、无味、无毒、沸点高、结晶点低和溶解能力强等优点,作为生产这种复写纸的新溶剂已获得广泛应用。它是由精萘和丙烯经催化烷基化反应制成。在日本和德国各有一座1万吨/年的生产装置。     

CS／PLLA／TPP纳米微胶囊的制备及体外释放

主要考察负载雷帕霉素（Rapaymcin,RAPA）的壳聚糖（Chitosan,CS）微球在加入左旋聚乳酸（L—polylactic acid,PLLA）时的载药量,包封率及在不同溶剂中的缓释性能。采用三聚磷酸钠（Sodium tripolyphosphate,TPP）作为离子交联剂,应用离子凝聚法制备CS／PLLA／TPP纳米微胶囊,用透射电镜和粒径分析仪进行了表征。结果表明：离子凝胶法可以得到粒径约300—400nm均匀分散的壳聚糖纳米微胶囊;微胶囊包封率可达84．25％,微胶囊载药量可达30．22％,雷帕霉素在不同溶剂中的缓释性能有很大不同。     

The study on the mechanical properties of PU/MF double shell selfhealing microcapsules

The self-healing microcapsules can be buried in the coating to improve the anticorrosive ability. In this paper,self-healing microcapsules of polyurea(PU)/melamine resin(MF) double shell were prepared by in-situ polymerization and interfacial polymerization with isocyanate as the core material. Scanning electron microscope was used to observe the microcapsule morphology. The structures of microcapsules prepared with different chain extenders were characterized by Fourier transform infrared spectroscopy. The micromanipulation system was used to loading–holding, loading–unloading and loading to rupture individual microcapsules, so as to explore the mechanical properties of microcapsules. The Young's modulus corresponding to microcapsules was calculated by mathematical model fitting. The self-healing properties of microcapsule coating were characterized by optical microscope. The experimental results showed that the microcapsule shell prepared under optimized conditions had a complete morphology and good mechanical properties. The microcapsule was in the elastic deformation stage under small deformation, and the plastic deformation stage under large deformation. The Young's modulus range of microcapsules was 9.29–14.51 MPa, and the corresponding Young's modulus could be prepared by adjusting the process. The surface crack of the coating containing microcapsule could heal itself after48 h in a humid environment.     

二异丙基联苯和三异丙基联苯混合物的合成研究

根据傅 克烷基化反应原理 ,以异丙醇为烷基化试剂 ,超酸作催化剂合成了一种主要含有二异丙基联苯和三异丙基联苯混合物的新型无碳复写纸染料溶剂 ,通过改变反应物配比、催化剂用量、反应温度等条件 ,得到合成二异丙基联苯和三异丙基联苯混合物的合适工艺条件 :反应物配比为 3∶1、催化剂质量分数 (以联苯的质量计 )为 5 0 %、温度为 85～ 90℃。     

一株产溶栓酶枯草杆菌的微胶囊固定化培养

The production of ATE(anti-thrombus enzyme) from a kind of Bacillus subtilis immobilized in NaCS-PDMDAAC microcapsules was studied.The influence of mean diameter of microcapsules, concentration of PDMDAAC and the components of culture medium on the production of ATE in the condition of encapsulation culture was studied. In shaking flasks, the maximum enzyme activity in microcapsules was 1850 UK·ml -1 when the mean diameter of microcapsules was 1.60 mm, the concentration of PDMDAAC was 2.0% and the culture medium was LB culture medium(Tryptone)+glucose(0.5%)+phosphate buffer(100 ml).A bubbling culture system was designed. In this system, the maximum enzyme activity in microcapsules was 2050 UK·ml -1 , which was 3.6 times that in the condition of suspension fermentation; the maximum cell density in microcapsules was 4.89×10 9cells·ml -1 , which was 2.7 times that in the condition of suspension fermentation.     

催化剂对烷基水杨酸锌树脂性能的影响

以水扬酸和苯乙烯为原料,经Friedel-Crafts 反应合成烷基水杨酸,加入氧化锌整合改性后制备烷基水杨酸锌树脂.通过考察AlCl3、对甲苯磺酸和乙酸锌三种活性不同的催化刺,探讨了树脂软化温度与取代度、显色性能的关系.烷基水杨酸锌树脂的软化温度为54-64℃时,可得到性能优良的无碳复写纸用显色剂.     

微型胶囊在胶粘剂中的应用

概述了微型胶囊的发展历程 ,制备方法和结构特征 ,探讨了微型胶囊制备技术在胶粘剂领域的应用方式和相应的破囊释放方式 ,展望了微型胶囊在胶粘剂中的应用前景。     

乙基纤维素-艾叶粉溶液微胶囊的制备

文章首次以乙基纡维素为壁材,采用溶剂蒸发法制得艾叶粉水溶液微胶囊。正交实验得出制备微胶囊的最佳工艺条件为：乙基纤维素：芯材：乙酸乙酯：水相=1：25：13：130（质量比）,搅拌速度：1500r／min,乳化时间：15mim,水油两相混合搅拌时间：10min。通过扫描电镜表征结果显示,所得微胶囊固体颗粒呈球形,分散性好,粒径在20-200μm范围内。实验制得微胶囊最大载药量为48．07％,具有良好的包覆效果。透析缓释实验表明,微胶囊在3.0℃恒温生理盐水浸泡60h后,仍有艾叶药理活性成分存在,较好地延长了储藏时间和药物有效作用时限。     

一步法制备生物相容油核微胶囊及其可控释放

一步法可控制备生物相容油核微胶囊对工业制备微胶囊及其应用具有重要意义。通过设计微流控器件,成功实现一步法制备尺寸均一可控的生物相容油核微胶囊。利用玻璃毛细管管套管的方法制备了微流控器件。通过外相水凝胶相剪切内相油相得到油核液滴,同时油核液滴和外相水凝胶相在重力作用下脱离管口,形成油核微胶囊,再通过交联水凝胶壳层得到稳定的结构。系统研究了微流控器件结构、内相流速、外相流速等参数对油核微胶囊油核数量、微胶囊直径、壁厚等性质的影响规律。生物相容油核微胶囊作为活性物质的理想载体,可以实现pH改变触发的快速释放和壁厚调节的缓慢释放,为其实际应用奠定了基础。