1.The swelling kinetics was discussed, and the effects of the reaction conditions, including the amounts of starch, monomers, initiator and crosslinker, on theequilibrium swelling ratioof the hydrogels were investigated.以硝酸铈铵(CAN)为引发剂、N,N′_亚甲基双丙烯酰胺(BIS)为交联剂,在水溶液中合成...
Even with the swelling ratio increasing to 75%, the SSH could retain its initial mechanical strength. However, a typical swelling-weakening phenomenon was observed for the control hydrogels. The compressive moduli of both the corresponding PAM single-network and PAM/PEG double-network hydrogels ...
Additionally, the replacement of BIS by the novel octafunctional crosslinker glyoxal bis(diallylacetal) (GLY) yielded an increase in the swelling ratio.doi:10.1016/S0032-3861(02)00133-7Wei XueIan W HamleyElsevier BVPolymerThermoreversible swelling behaviour of hydrogels based on N-isopropylacrylamide ...
were prepared,respectively.The swelling test results showed that the swelling ratio of PNIPAAm and PNIPAAm/CMC semi-IPN hydrogels were influenced by the temperature and pH.Swelling ratio of hydrogels decreased with the increase of cross-linker content but increased with the increase of CMC content....
Although the equilibrium swelling ratio of the hydrogels with low concentrations of itaconic acid was almost not affected by changes in the temperature, the equilibrium swelling ratio of the hydrogels with high concentrations of itaconic acid increased in the temperature range of 20–50°C. © ...
HuaLi, inThe Mechanics of Hydrogels, 2022 10.2.9Kinetic swelling ratio A kineticswelling ratioSR(t)is defined as the following volume ratio of the hydrogel with timet, (10.34)SR(t)=VtV0 whereVtandV0are the volumes of the hydrogel at timetand dry state, respectively. If the hydrogel is ...
Each sorption curve can then be described by a combination of a mutual diffusion coefficient and a surface relaxation rate. The sigmoidicity of the sorption curves is accordingly determined by the ratio of a characteristic diffusion time to a characteristic surface relaxation time. More classical, ...
1) swelling ratio 溶胀比1. The effects of reaction temperature,the amount of AM monomer,cross - linking agent, and initiator on the swelling ratio of the hydrogel were investigated. 考察了介质的离子浓度、pH值和温度对水凝胶溶胀比的影响,结果表明,离子浓度越大,水凝胶的溶胀比越小;水凝胶具有一定...
Scanning electron microscopy, and flotation experiments together with swelling ratio studies reveal that the polymeric network of the former hydrogel is characterised by an open structure with more pores and higher swelling ratio but lower mechanical strength compared to the latter hydrogels. Such rapid ...
Hydrogels copolymers N,N-dimethylacrylamide (DMA) and maleic acid (MA) were prepared by free-radical polymerization at 56°C in aqueous solution, using N,N-methylenebisacrylamide (NMBA) as cross-linking agent and potassium persulfate (KPS) as initiator. The effects of comonomer composition, cross...