单分散多孔聚MMA/HEMA微球的制备

采用液滴微流控法,制备了单分散性良好的水包油(O/W)乳液,以此乳液为模板,通过紫外光引发聚合得到单分散多孔聚甲基丙烯酸甲酯(MMA)/甲基丙烯酸2-羟乙酯(HEMA)多孔微球。研究了油相中表面活性剂聚蓖麻酸甘油酯(PGPR)含量对微球表观密度孔隙率及对乙二醇二甲基丙烯酸酯(EGDMA)的吸附能力的影响。结果表明:增加PGPR含量可改变微球的多孔结构并增大其吸附能力,在油污废水处理领域具有潜在的应用价值。     

单分散多孔聚MMA/HEMA微球的制备

采用液滴微流控法,制备了单分散性良好的水包油(O/W)乳液,以此乳液为模板,通过紫外光引发聚合得到单分散多孔聚甲基丙烯酸甲酯(MMA)/甲基丙烯酸2-羟乙酯(HEMA)多孔微球。研究了油相中表面活性剂聚蓖麻酸甘油酯(PGPR)含量对微球表观密度孔隙率及对乙二醇二甲基丙烯酸酯(EGDMA)的吸附能力的影响。结果表明:增加PGPR含量可改变微球的多孔结构并增大其吸附能力,在油污废水处理领域具有潜在的应用价值。     

甲基丙烯甲酯及其衍生物的共聚研究

以甲基丙烯酸甲酯和一缩二乙二醇为原料,甲醇钠为催化剂,石油醚为溶剂,合成了一缩二乙二醇甲基丙烯酸酯。然后,以单酯和甲基丙烯酸羟乙酯为原料,偶氮二异丁腈为引发剂,合成了一缩二乙二醇甲基丙烯酸酯与甲基丙烯酸羟乙酯的共聚物(2-p-HEMA)。     

甲基丙烯酸-β-羟乙酯磷酸酯的合成及应用

以甲基丙烯酸-β-羟乙酯（HEMA）和五氧化二磷（P2O5）为原料,合成了甲基丙烯酸-β-羟乙酯磷酸酯（PMOE）。研究了P2O5用量、反应温度和加水条件等对PMOE中单酯和双酯含量的影响。用已合成的少量PMOE作为分散剂,反应温度75℃,n（HEMA）：n（P2O5）=2．08：1．00时,可制备双酯含量为70％以上的PMOE。以PMOE和乙酸铜反应,制备了透明的Cu（Ⅱ）-PMOE金属配合物,与甲基丙烯酸甲酯（MMA）共聚,可得到用途广泛的紫外-近红外吸收透明聚合物材料。     

不变黄HDI-PU/P(MMA-HEMA)互穿网络胶粘剂形态与性能的研究翁祥

制备了HDI(1,6-己二异氰酸酯)型聚酯聚氨酯/聚(甲基丙烯酸甲酯-甲基丙烯酸-β羟乙酯)(HDI-PU/P(MMA-HEMA))互穿网络胶粘剂,研究了接枝剂甲基丙烯酸-β羟乙酯(HEMA)用量对其形态、性能与分子结构的影响。结果表明,接枝剂HEMA可使分散相接枝到连续相中形成复合网络,从而改善其界面的相容性,提高其胶液粘度和初粘力,并可广泛作为制鞋工业用胶。     

水性丙烯酸树脂二级分散体的合成研究

以甲基丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸丁酯、甲基丙烯酸羟乙酯、丙烯酸等为共聚单体,丙烯酸酯磷酸酯作为功能单体,丙二醇丁醚为溶剂,过氧化苯甲叔丁酯为引发剂,通过溶液聚合经转相制备了羟基型水性丙烯酸树脂二级分散体。研究了聚合过程中溶剂、引发剂、链转移剂、丙烯酸、甲基丙烯酸羟乙酯以及丙烯酸酯磷酸酯等因素对分散体性能的影响。优化的配方为:引发剂用量为单体总质量的2%,链转移剂用量1%,丙烯酸用量3%,丙烯酸酯磷酸酯5%,羟基含量3.5%。     

羟化含氟嵌段共聚物的合成

用α-溴代丙酸乙酯(EPN-B)/氯化亚铜(CuCl)/联二吡啶(bpy)作为ATRP催化引发体系,环己酮为溶剂,进行甲基丙烯酸2,2,2-三氟乙酯(TFEMA)的原子转移自由基聚合(ATRP),得到单分散PTFEMA-X预聚体。并以此预聚体为大分子引发剂引发甲基丙烯酸-β-羟乙酯聚合,得到分子质量可控、分子质量分布窄的聚甲基丙烯酸2,2,2-三氟乙酯-b-聚甲基丙烯酸-β-羟乙酯嵌段共聚物,用FTTR、~1H-NMR、GPC等对产物的结构与性能进行了表征。     

玻璃纤维增强的树脂模塑制品用涂料

丙烯酸浆的制备： 1．甲基丙烯酸甲酯 95．0份 2．甲基丙烯酸羟乙酯 5．0份     

SPG膜乳化与界面聚合法制备单分散多孔微囊膜

小粒径单分散中空储库结构微囊膜的制备具有重要学术意义和实用价值。为此采用了SPG(Shirasu-Porous-Glass)膜乳化法和界面聚合法，对小粒径单分散多孔微囊膜的制备进行了较系统的实验研究，以期为进一步制备多孔内接枝环境感应型功能凝胶开关的小粒径单分散微囊型靶向式药物载体提供基体。研究结果表明，采用SPG膜乳化法可制得单分散性良好的乳液液滴，进而采用界面聚合法可得到单分散微囊。用膜乳化方法易于控制乳液液滴及微囊的大小，在研究中SPG膜乳化法制备的乳液液滴及微囊的平均粒径大约是所用膜孔径的3．6倍。微囊膜的多孔性可以靠改变溶剂和单体的成分来进行控制，扫描电镜检测结果表明所制备出的不同粒径级别的单分散微囊膜均具有良好的多孔结构。     

甲基丙烯酸或丙烯酸β-羟烷基酯的研制

目前国际上研究得较多的(甲基)丙烯酸系β-羟烷酯,主要是甲基丙烯酸β-羟乙酯、羟丙酯、羟丁酯和丙烯酸β-羟乙酯、羟丙酯和羟丁酯共六种,其中工业价值最大的是四种羟乙酯与羟丙酯,我们自1981年开始研制,1983年12月通过部级鉴定。一、制备 1.催化-阻聚系统以甲基丙烯酸或丙烯酸和环氧乙烷或环     

单分散油包水乳液制备的研究进展

单分散油包水(W/O)乳液在食品、化妆品、药剂以及高分子微球微囊合成等方面具有广泛的应用。该文综述了近年来单分散W/O乳液的主要制备方法及其基本原理,此外还简要介绍了其在单分散温敏性微球微囊和可生物降解微球微囊合成方面的应用,以期为单分散W/O乳液的制备提供参考。     

Microcapsules prepared from a polycondensate‐based cement dispersant via layer‐by‐layer self‐assembly on melamine‐formaldehyde core templates

Novel microcapsules were prepared from colloidal core–shell particles by acid dissolution of the organic core. Weakly crosslinked, monodisperse and spherical melamine‐formaldehyde polycondensate particles (diameter ～ 1 μm) were synthesized as core template and coated with multilayers of an anionic polyelectrolyte via layer‐by‐layer deposition technique. As polyelectrolytes, an anionic naphthalenesulfonate formaldehyde polycondensate that is a common concrete superplasticizer and thus industrially available, and cationic poly(allylamine hydrochloride) were used. Core removal was achieved by soaking the core–shell particles in aqueous hydrochloric acid at pH 1.6, resulting in hollow microcapsules consisting of the polyelectrolytes. Characterization of the template, the core–shell particles, and the microcapsules plus tracking of the layer‐by‐layer polyelectrolyte deposition was performed by means of zeta potential measurement and scanning electron microscopy. The microcapsules might be useful as microcontainers for cement additives. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Pickering乳液法制备复合壳层微胶囊及其在涂料中的应用

以水包油（O/W）型 Pickering乳液为模板，经 UV光聚合法制备复合壳层中空微胶囊，探究了乳化剂纳米粒子的加入方式、粒径和光敏低聚物 PUA对微胶囊壳层的影响，并将微胶囊加入到树脂涂层中，探究微胶囊作为填料对涂层基本性能的影响。使用傅立叶变换红外光谱、扫描电镜、光学显微镜、热重等仪器对微胶囊结构进行表征，并对涂层性能进行了测试。结果表明：乳化剂 SiO₂-E纳米粒子加入到油相中制备得到的中空微球表面镶嵌有 SiO₂-E纳米粒子；乳化剂纳米粒子粒径的增加，影响中空微球的形貌但对尺寸无影响；当 PUA的质量分数从 10%增加到 30%时，中空微胶囊表面分布的纳米粒子减少，断裂伸长率从 11. 1%增加至 34. 5%，而最大拉伸应力从 21. 5 MPa降低至12. 1 MPa。中空微胶囊加入到涂料中，随中空微胶囊含量的增加，涂层的铅笔硬度提高且附着力良好。     

Macroporous polymers from particle-stabilized emulsions

Macroporous polymers are attractive materials due to their low density, low cost, recyclability and tunable mechanical and functional properties. Here, we report a new approach to prepare macroporous polymers from emulsions stabilized with colloidal polymeric particles in the absence of chemical reactions. Stable water-in-oil emulsions were prepared using poly(vinylidene difluoride) (PVDF), poly(tetrafluoroethylene) (PTFE), and poly(etheretherketone) (PEEK) as stabilizing polymeric particles in emulsions. The partial wetting of the polymeric particles by the two immiscible liquids drives particles at the water-oil interface during emulsification, leading to extremely stable water-in-oil emulsions. The particle-stabilized emulsions were processed into highly porous solid polymer components upon drying and sintering. The high stability of emulsions also allows for the preparation of hollow polymeric microcapsules. We describe the conditions required for the adsorption of particles at the liquid-liquid interface, we show the rheological behavior of the polymer-loaded wet emulsions and, we discuss the effect of the emulsions' initial compositions on the final sintered porous structures. This new approach for the fabrication of macroporous PVDF, PTFE, and PEEK polymers is particularly suited for the preparation of porous materials from intractable polymers but can also be easily applied to a variety of other polymeric particles.     

软模板法制备单分散中空有机硅微球

通过硅氧烷单体在碱性条件下的水解-聚合反应,制备出了单分散乳液,研究了乳化剂HLB、反应时间、乳化剂用量、单体用量等因素对乳液的影响。然后以该乳液为模板、有机硅为壳层进行包覆,得到了中空微球。采用纳米粒度及Zeta电位分析仪、SEM、TEM、EDS、FTIR对乳液及中空微球进行表征。结果表明,在室温条件下,反应时间为6h时能够制备出单分散性较好的乳液,通过改变乳化剂用量、单体用量,能够实现对乳液粒径的调控,调控范围346～472 nm。以该乳液为模板进行缓慢包覆,当乳化剂质量分数低于0.003%时,能够得到形貌规整的单分散中空微球,中空微球的主要成分为有机硅。与硬模板法相比,该模板通过乙醇洗涤即可除去,制备过程较为简单。     

微流芯片制备粒径均一的壳聚糖-NaCS/TPP微胶囊

以壳聚糖、纤维素硫酸钠（NaCS）和三聚磷酸钠（TPP）为原料,采用十字型微流芯片制备了粒径均一的壳聚糖-NaCS/TPP微胶囊,微通道宽200 μm,高1 mm。分析了微通道内的三种流动状态、分散剂用量、壳聚糖浓度、油水两相流速等因素对壳聚糖微液滴形成的影响,确定了合适的制备条件。以2%(质量)壳聚糖醋酸水溶液为水相,液体石蜡为油相,5%(质量)Span 85为油相分散剂,水相流速5 μl·min^-1,调节油相/水相流速比为40～100,可以形成均匀的壳聚糖微液滴,粒径分布系数小于0.1。壳聚糖微液滴与1% NaCS和3% TPP的混合溶液反应,固化形成了中间空心、周边由两层膜构成的壳聚糖-NaCS/TPP微胶囊。结果表明,采用微流芯片可以有效控制液滴直径,制备粒径均一的微胶囊。     

制备单分散含单体O/W乳液的SPG膜乳化过程

采用Shirasu多孔玻璃（SPG）膜乳化法制备了单分散含对苯二甲酰氯（TDC）单体的O/W乳液,系统地研究了SPG膜乳化过程的影响因素.实验结果表明,采用SPG膜乳化法制备单分散O/W乳液时,选择阴离子表面活性剂比考虑亲水亲油平衡（HLB）匹配更重要;增大分散相或连续相的黏度,能够改善乳液的单分散性和稳定性;随着单体浓度增加,乳液的单分散性变差,液滴的平均粒径逐渐变小.当SPG膜孔径大于1.0 μm左右时,可得到单分散的含TDC单体乳液;而当孔径小于1.0 μm左右时,水分子更容易扩散并溶解到油水界面甚至油相内部与TDC生成对苯二甲酸（TPA）,TPA积累到一定程度在油水界面上析出将膜孔堵塞,从而无法制得单分散乳液.随着乳化时间增长,乳液的平均直径逐渐变小、单分散性逐渐变差.     

Influence of Oil Load and Maltodextrin Concentration on Properties of Tuna Oil Microcapsules Encapsulated in Two-Layer Membrane

The two layers of tuna oil-in-water emulsions containing different oil loads (5–10 wt%) and maltodextrin concentrations (10–20 wt%) were stabilized by a lecithin–chitosan membrane. The liquid emulsions were then spray dried at an inlet air temperature of 180 ± 2°C and an outlet air temperature of 85 ± 5°C. The characteristics of liquid emulsion (creaming and mean droplet size) and spray-dried microcapsules (moisture content, water activity, color, morphology, glass transition temperature, and encapsulation efficiency) were measured. The results suggest that two-layer oil-in-water emulsions are an effective system to produce high oil-loaded microcapsules, which may lead to its wide application for use in food products.