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Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
Modification of mechanical properties of hydroxypropyl cellulose (HPC) gels by blending polyvinyl alcohol (PVA) was investigated. The blend gels constructed with HPC and PVA were prepared by electron beam irradiation to their high concentrated aqueous solution. Gel fraction of the blend gels increased sharply up to 10 kGy, and leveled off at 50 kGy. It was found that PVA content caused a decrease in the gel fraction. Elongation at break of the blend gel obtained at 50 kGy gradually increased with the PVA content beyond 0.4wt%, and reached 125% at 4wt% of PVA, which was about 1.8 times larger than that of the pure HPC gel. Therefore, the HPC hydrogels with desired mechanical properties were obtained by the combination of PVA blending with the radiation crosslinking technique.
Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Tamada, Masao
no journal, ,
no abstracts in English
Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
no abstracts in English
Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
Radiation modification of hydroxypropyl cellulose (HPC) hydrogels by blending polyvinyl alcohol (PVA) was investigated. The blend hydrogels constructed with HPC and PVA were prepared by electron beam irradiation to high concentrated aqueous solutions. Gel fraction of the blend hydrogels increased sharply up to 10 kGy, and leveled off at 50 kGy. It was found that PVA content caused a decrease in the gel fraction. Elongation at break of the blend hydrogels obtained at 50 kGy gradually increased with the PVA content beyond 0.4 wt%, and reached 125 % at 4 wt% of PVA, which was about 1.8 times larger than that of the pure HPC hydrogel. Therefore, the HPC hydrogels with desired mechanical properties were obtained by the combination of PVA blending with the radiation crosslinking technique.
Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
Modification of mechanical properties of hydroxypropyl cellulose (HPC) gels by radiation crosslinking with functional monomers was investigated. The modified HPC hydrogels were prepared by electron beam irradiation to highly concentrated aqueous solutions containing HPC, 2-hydroxy methacrylate (HEMA) and tricosaethylene glycol dimethacrylate (23G). Tensile strength and elongation at break of HPC/HEMA/23G hydrogel (20/2.0/0.2 wt%) obtained at 50 kGy were 2.0 kg/cm
and 124%, which exhibited about 2.0 times larger than these of the pure HPC hydrogel. Therefore, the HPC hydrogels with desired properties were obtained by radiation crosslinking HPC with monomers.
Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
Preparation of HPC hydrogels with good mechanical properties as well as transparency was investigated. The modified HPC hydrogels were prepared by electron beam irradiation to highly concentrated aqueous solutions containing HPC, tricosaethylene glycol dimethacrylate (23G) and 2-hydroxy methacrylate (HEMA). The addition of 23G with HPC induced the increase in the gel fraction, especially at less than 20 kGy. It was found that the gel fraction of the HPC/23G/HEMA hydrogel decreased drastically. Tensile strength and elongation at break of HPC/HEMA/23G hydrogel (20/2.0/0.2 wt%) obtained at 50 kGy were 2.0 kg/cm and 124%, which exhibited about 2.0 and 1.8 times larger than these of the pure HPC hydrogel, respectively. Therefore, the HPC hydrogels with desired properties were obtained by radiation crosslinking HPC with monomers.
Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
no abstracts in English
Hiroki, Akihiro; Sato, Toshihiro*; Nagasawa, Naotsugu; Taguchi, Mitsumasa; Tamada, Masao
no journal, ,
no abstracts in English