我们报告了使用RAFT水性分散聚合配方通过聚合诱导的自组装(PISA)合成阳离子空间稳定的二嵌段共聚物纳米粒子。阳离子空间稳定剂是基于季铵化的聚甲基丙烯酸2-(二甲基氨基)乙酯(PQDMA)的大分子链转移剂(macro-CTA),疏水性成核嵌段基于聚甲基丙烯酸2-(羟丙基)酯(PHPMA)。研究了各种合成参数(如盐浓度,固体含量,相对嵌段组成和阳离子电荷密度)的影响。在没有盐的情况下,由于高度阳离子的PQDMA稳定剂链之间的排斥力强,因此自组装会遇到问题。然而,在存在盐的情况下,可以通过以下方式解决此问题:(i)将QDMA单体与非离子型共聚单体(例如,单甲基丙烯酸甘油酯,GMA)进行统计共聚,或(ii)使用PQDMA宏CTA和聚(甲基丙烯酸单甘油酯)(PGMA)宏CTA。这些阳离子二嵌段共聚物纳米粒子通过1 H NMR光谱,动态光散射(DLS),透射电子显微镜(TEM)和水性电泳。NMR研
Methods of manufacturing deodorants, and deodorants resulting thereof
申请人:Hu Jinlian
公开号:US20050232880A1
公开(公告)日:2005-10-20
This invention provides a deodorant capable of releasing deodorant agents at certain temperatures and having improved adherence to textiles. The deodorant of this invention includes polymer particles formed by reacting a main monomer of (N-substituted alkyl)acrylamide, a functional monomer for bonding the polymer particles to a fibrous substrate, and a cross-linking agent. A deodorant agent is loaded to the polymer particles.
Cation-Condensed Microgel-Core Star Polymers as Polycationic Nanocapsules for Molecular Capture and Release in Water
作者:Kaoru Fukae、Takaya Terashima、Mitsuo Sawamoto
DOI:10.1021/ma300266k
日期:2012.4.24
ruthenium-catalyzed living radical polymerization. Analyzed by UV–vis spectroscopy, the starpolymer efficiently encapsulated various hydrophilic dyes carrying sulfonate anions (methyl orange: MO; orange G: OG; methyl blue: MB) in water (UV–vis: ∼400 OG per a singlestar). The efficient dye encapsulation is due to the high concentration of quaternary ammonium cations in the core. The number of core-bound dyes
The structure–antibacterial activityrelationship of these cationic polymers was investigated against E. coli and S. aureus, including PEGylation, random structure, molecular weights, and the content and lengths of the hydrophobic alkyl side chains. The results indicated that PEGylated random amphiphilic cationic copolymer (mPB35/T57) showed stronger antibacterial activity and better biocompatibility
模仿抗菌肽的两亲性阳离子聚合物由于其出色的抗菌活性而受到越来越多的关注。但是,阳离子聚合物的结构与其抗菌效果之间的关系仍然不清楚。在我们目前的工作中,已经制备了一系列由疏水性烷基改性和季铵盐(QAS)部分组成的PEG封闭的两亲阳离子聚合物。研究了这些阳离子聚合物对大肠杆菌和金黄色葡萄球菌的结构-抗菌活性关系,包括聚乙二醇化,无规结构,分子量以及疏水性烷基侧链的含量和长度。结果表明,聚乙二醇化无规两亲阳离子共聚物(mPB 35/ T 57)比没有PEG(PB 33 / T 56)的无规共聚物表现出更强的抗菌活性和更好的生物相容性。此外,发现具有适当摩尔分数的烷基侧链(f烷基= 0.38),聚合度(DP = 92)和四碳疏水烷基部分的mPB 35 / T 57具有最佳的结构,具有最佳的抗菌性。对大肠杆菌(MIC = 8μg/ mL,选择性> 250)和金黄色葡萄球菌(MIC = 4μg/ mL,选择性>
METHOD FOR PRODUCING ORGANIC TELLURIUM COMPOUND AND METHOD FOR PRODUCING VINYL POLYMER
申请人:OTSUKA CHEMICAL CO., LTD
公开号:US20220009885A1
公开(公告)日:2022-01-13
Provided is a method for producing an organic tellurium compound that enables the production of an organic tellurium compound in high yield using metallic tellurium as a source material and produces less amount of side products. A method for producing an organic tellurium compound includes the steps of: (A) reacting metallic tellurium with a compound represented by a general formula (1) below; and (B) reacting a compound obtained by the step (A) with an organic halogen compound, the metallic tellurium having a copper content of less than 100 ppm,
M(R
1
)m Formula (1)
where R
1
represents an alkyl group having 1 to 8 carbon atoms, an aryl group or an aromatic heterocyclic group, M represents an alkali metal or an alkaline earth metal, m represents 1 when M is an alkali metal, and m represents 2 when M is an alkaline earth metal.