2001年7月1日 · Thermo-sensitive poly (N -isopropylacrylamide) (PNIPAM) microgels with different cross-linker density have been investigated by complementary scattering methods and high-resolution imaging techniques.

The tacticity effect on phase separation process of poly(N-isopropylacrylamide) (PNiPAM) aqueous solutions was investigated by dynamic light scattering (DLS) and small angle neutron scattering (SANS) measurements. SANS measurement revealed that hydrophobicity of PNiPAM consisting of meso- and racemo-isomers increased with increasing the meso ...

2018年12月1日 · DLS (Nano-S90, Malvern 1000 HSA) with a scattering angle of 90° and a quartz cuvette (1 mL sample size) was used to measure both derived count rate (DCR) and hydrodynamic particle diameter (d, z-average) of aqueous PNIPAM solution from 25 to 50 °C with an interval of 0.2 °C.

Here, we first investigated factors governing the ability of DLS to accurately measure PNIPAm size in solution at 25 °C as part of a quality study of five different molecular weight, commercially sourced PNIPAm.

2024年1月10日 · In this report, we investigate dynamic light scattering (DLS) from both randomly diffusing silica particles and acousto-responsive microgels in aqueous dispersions under ultrasonic...

本文结合核磁共振（nmr）、动态光散射（dls）和透射电子显微镜（tem）等表征方法，对自主合成的聚阴离子型温敏嵌段共聚物—聚（苯乙烯磺酸钠）-b-聚（ n -异丙基丙烯酰胺）（psss 50 -b-pnipam 300 ）在纯水、水/甲醇以及水/丙酮三种溶剂中的温度响应性和自组装 ...

采用表面引发原子转移自由基聚合 (SI-ATRP)的方法合成具有温度响应的杂化颗粒SiO 2 -PNIPAM (PNIPAM:聚 (N-异丙基丙烯酰胺),通过傅里叶变换红外 (FTIR)光谱、扫描电镜 (SEM)、热失重 (TGA)、动态光散射 (DLS)对接枝前后的杂化颗粒进行表征与分析,结果表明:SiO 2...

In this study, we used free radical polymerization to develop a temperature and pH-responsive poly (N-isopropyl acrylamide)-co-poly (acrylamide) (PNIPAM-co-PAAm). PNIPAm-co-PAAm copolymer by...

2019年3月4日 · Poly-N-isopropyl acrylamide (PNIPAM) nanogels have been modified with different acrylic acid (AAc) contents for the efficient control of lower critical solution temperature (LCST). In this study, PNIPAM-co-AAc nanogels nanogels showed two volume phase transitions in comparison with PNIPAM.

2023年3月15日 · The DLS results demonstrated narrow size distribution of PNIPAM nanoparticles, indicating successful polymerization and good size control by the reactor size. A decrease in the swelling capacity of nanocomposite hydrogel above the phase transition temperature was observed since the PNIPAM nanoparticles are in …