Drying shown in Figure 7. The 1-Methylpyrrolidine Purity 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 around 1722 cm-1was also observed roughly 1722 cm-1 was also observed the stretching within the HPC/23G/HEMA hydrogel, having a a low gel fraction obtainedat ten kGy. Thus, in the HPC/23G/HEMA hydrogel, with low gel fraction obtained at 10 kGy. For that reason, this indicated that 23G and HEMA had been combined chemically or physically with HPC as this indicated that 23G and HEMA have been combined chemically or physically with HPC as the homopolymer and unreacted monomer have been removed by washing prior to the measurethe homopolymer and unreacted monomer have been removed by washing prior to the ment. Though there was pretty much no peak no peak in the HPC/23G Ubiquitin Related Proteins Source hydrogel hydrogel measurement. Despite the fact that there was virtually observed observed in the HPC/23G spectrum, this might be could the extremely low concentration of 23G. Clearly, 23G was present within the spectrum, this due tobe due to the pretty low concentration of 23G. Clearly, 23G was present HPC/23G hydrogels because each the gel the gel and tensile strength strength compared in the HPC/23G hydrogels for the reason that both fraction fraction and tensile elevated elevated to the HPC hydrogels hydrogels ready The transmittances from the HPC/23G the when compared with the HPCprepared with no 23G.without having 23G. The transmittances of and HPC/23G/HEMA hydrogels are shown in are shown in Figure 8. Each HPC-based HPC/23G and HPC/23G/HEMA hydrogels Figure 8. Both HPC-based hydrogels had been very transparent and exhibited and exhibited virtually exactly the same transparency as the hydrogels have been extremely transparentalmost the exact same transparency as the HPC hydrogel without having 23G and HEMA. and HEMA. HPC hydrogel without the need of 23GAppl. Sci. 2021, 11, x FOR PEER Evaluation 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, ten 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), as well as the following concentration and ten kGy and 50 kGy). dose.(20 wt. , 50wt. , 50 kGy), HPC/23G (20/0.two 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).one hundred 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.
