Preparation method of polyether / polyacrylamide monomethyl / Polyacrylamide / granular poly (N-isopropylacrylamide) chitosan hydrogel

Today, I want to share with you polyether / polyacrylamide - Methyl group / polyacrylamide / Granular polymer N- Isopropylacrylamide chitosan hydrogel The preparation method of , Study with Xiaobian ！

polyether - Preparation method of chitosan hydrogel ： Mass ratio of polyether to chitosan , Gel temperature , The concentration of crosslinking agent glutaraldehyde is equal to polyether - Swelling degree of chitosan hydrogel , Effect of hardness . The process conditions were optimized by orthogonal experiment , The result of orthogonal experiment shows : When the mass ratio of polyether to chitosan is 0.4, The gel temperature is 45℃, hand over The concentration of the coupling agent is 0.05mol/L when , The saturation swelling degree of its gel is 837%; When the mass ratio of polyether to chitosan is 0.6, The gel temperature is 45℃, The concentration of crosslinking agent is 0.15mol/L when , Its gel hardness is 436g. polyether - Chitosan hydrogel has good biocompatibility .

polyacrylamide - Preparation of methyl chitosan hydrogel ： A two-step method was used to prepare PAAm-CMCs-Fe3+ Covalent ionic double crosslinked composite hydrogel , Its elongation at break can reach 1489%, The breaking strength reaches 315.6KPao Rotational rheological tests show that the hydrogel system has good inclusiveness , The spline stretch shape variable is 100% The resistance increases by about 38%, the 20 The resistance change rate of the samples after repeated stretching is basically stable , It has good tensile strain response .

  Granular polymer N- Preparation of isopropylacrylamide chitosan hydrogel ：

By inverse suspension polymerization , Synthesized with temperature /pH Sensitive poly N- Isopropylacrylamide / Chitosan granular semi interpenetrating network (PNIPA/CSsemi-IPN) hydrogel , The hydrogel was studied at different temperatures , Different pH Change of swelling rate under medium and different composition . It turns out that : The lowest critical solution temperature of the hydrogel (LCST) And PNIPA Hydrogels are basically the same , Both in 33℃ about ,pH=3 The swelling rate reaches the maximum , It has obvious temperature and pH Sensitivity . Chitosan (CS) Different proportions of also have a great impact on the swelling rate of gel .

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Ruixi YWX.2022.7.4