Synthesis of PEG-PCL-based polyurethane nanoparticles by miniemulsion polymerization

Potential application of Thermomyces lanuginosus lipase (TLL) immobilized on nonporous polystyrene particles

“…According to the results, soluble lipase had maximal activity at 60°C and immobilized enzyme showed a range of temperatures between 60°C and 70°C with an increase of 37% in the hydrolytic activity. The results reported can be attributed to the fact that immobilized enzymes are less sensitive to thermal inactivation since their structure can be protected after immobilization process, increasing the temperature range of application .…”

“…Hydrolysis activity of p‐nitrophenyl palmitate (p‐NPP) was measured in 0.5% p‐NPP ethanol solution (m/v) follow methodology previously described by Valério et al, 2015 . The increase in the absorbance by the release of p‐nitrophenol in the hydrolysis of p‐NPP was measured spectrophotometrically at 400 nm.…”

“…To improve the products separation, successive reuse cycles, and keep the biocatalyst activity and stability during reactions process, different techniques can be used in the immobilization process, such as adsorption [11,12], covalent bonding [13,14], and entrapment [9,[15][16][17]. In the literature, organic and inorganic supports for enzyme immobilization are reported [7,9,10,18], and many studies confirm the potential use of polymers as a support for enzyme immobilization [5,7,15,16,19]. Among the polymers, polystyrene (PS) is a thermoplastic polymer, low cost, that can be easily synthesized and used as support [15].…”

Palm kernel oil polyol based shape memory polyurethane: effect of polycaprolactone and polyethylene glycol as soft segment

“…The remaining free isocyanate (-NCO) that appeared at 2260 cm −1 and the isocyanate terminated HMDI-PEG mixture were then reacted with -OH groups in PCL as PCL was added to the reaction, hence reduced the free NCO peak intensity ( figure 4(b)). The intensity of free hydrogen bonding (F-CO) at 1725 cm −1 increased significantly due to the presence of typical carbonyl C=O stretching vibration of ester groups in PCL [33], with the overlapping of the amide band. The intensity of carbonyl stretching vibration of amide I, and the stretching vibrations of secondary amide increased gradually with further incorporation of PKOp (figure 4(c)).…”

Synthesis of fluorescent diblock copolymer nanoparticle supported catalyst for the reduction of Cr(VI), p-nitrophenol and rhodamine 6G dye: a comparative study

“…Yan and co-workers [8] synthesized a DBC between PCL and PEG. Similarly, the other DBC systems such as methoxyPEG [9], poly(N-isopropylacrylamide)-b-PCL [10], PCL-PEG [11], MeO-Peg-NH-L-GlyA-PCL [12], PCL-PDMAEMA [13], PE-PCL [14], PEG-PCL-PU [15], chitosan-PCL [16], PCL-collagen [17], PCL-poly (oxanorbornene) [18], PCL-PS [19] and PCL-piperazine-PU [20] were synthesized for bio-medical applications. In 2016, Murugesan and research team [21] synthesized poly(sulphanilicacid)-PCL triblock copolymer for humidity sensor and drug-release application.…”