Drying shown in Figure 7. The HPC-based hydrogels displayed a prominent peak at drying are are shown in Figure 7. The HPC-based hydrogels displayed a prominent peak at 1050 cm1-1,which was attributed to C-O asymmetric stretching. The prominent band for 1050 cm- , which was attributed to C-O asymmetric band for confirming the ester on 23G and HEMA was observed at 1722 cm-1and was attributed to observed at 1722 cm-1 and was attributed to confirming the ester the stretching vibration of C = O. The peak at about 1722 cm-1was also observed roughly 1722 cm-1 was also observed the stretching within the HPC/23G/HEMA hydrogel, using a a low gel fraction obtainedat ten kGy. Hence, within the HPC/23G/HEMA hydrogel, with low gel fraction obtained at ten kGy. Consequently, this indicated that 23G and HEMA have been combined chemically or physically with HPC as this indicated that 23G and HEMA have been combined chemically or physically with HPC because the homopolymer and unreacted monomer were Talsaclidine Technical Information removed by washing before the o-Phenanthroline supplier measurethe homopolymer and unreacted monomer had been removed by washing ahead of the ment. Though there was nearly no peak no peak in the HPC/23G hydrogel hydrogel measurement. Though there was just about observed observed in the HPC/23G spectrum, this could possibly be could the extremely low concentration of 23G. Clearly, 23G was present within the spectrum, this due tobe as a consequence of the incredibly low concentration of 23G. Clearly, 23G was present HPC/23G hydrogels since both the gel the gel and tensile strength strength compared in the HPC/23G hydrogels since both fraction fraction and tensile improved elevated to the HPC hydrogels hydrogels prepared The transmittances from the HPC/23G the compared to the HPCprepared with out 23G.devoid of 23G. The transmittances of and HPC/23G/HEMA hydrogels are shown in are shown in Figure eight. Both HPC-based HPC/23G and HPC/23G/HEMA hydrogels Figure eight. Each HPC-based hydrogels have been highly transparent and exhibited and exhibited nearly exactly the same transparency as the hydrogels had been hugely transparentalmost precisely the same transparency as the HPC hydrogel without 23G and HEMA. and HEMA. HPC hydrogel without 23GAppl. Sci. 2021, 11, x FOR PEER Assessment Appl. Sci. 2021, 11, x9168 PEER Review Appl. Sci. 2021, 11, FOR8 of 11 88 of 11 ofTransmittance (a.u.) Transmittance (a.u.)HPC HPC HPC/23G HPC/23G HPC/23G/HEMA, 10 kGy HPC/23G/HEMA, 10 kGy HPC/23G/HEMA, 50 kGy HPC/23G/HEMA, 50 kGy172218001500 1200 900 1500 1200 900 Wavenumber (cm-1) Wavenumber (cm-1)600Figure 7. FT-IR ATR spectra of HPC-based hydrogels obtained at the following concentration and Figure FT-IR Figure 7.7. (20 wt. ,ATR spectra of HPC-based hydrogels obtained at the following concentration dose. HPCFT-IR ATR spectra of HPC-based hydrogels obtained at HPC/23G/HEMA (20/0.2/2 and 50 kGy), HPC/23G (20/0.2 wt. , 50 kGy), along with the following concentration and ten kGy and 50 kGy). dose.(20 wt. , 50wt. , 50 kGy), HPC/23G (20/0.2 wt. , 50 kGy), and HPC/23G/HEMA dose. wt. , HPC HPC (20 kGy), HPC/23G (20/0.2 wt. , 50 kGy), and HPC/23G/HEMA (20/0.2/2 (20/0.2/2 wt. , 50 kGy). wt. , ten kGy and10 kGy and 50 kGy).100 one hundred 80 80 60 60 40 40 20 20 0 0 300Transmittance Transmittance HPC/23G HPC/23G HPC/23G/HEMA HPC/23G/HEMA400 500 600 700 400 500 600 700 Wavelength (nm) Wavelength (nm)800The mechanical properties of HPC-based hydrogels are shown in Figure 9. Young’s The mechanical properties of HPC-based hydrogels are shown in Figure 9. Young’s moduli of HPC-based hydrogels HPC-based hydrogels are shown in Fig.
