ʻO ka Hydroxypropyl cellulose (HPC) he polymer maʻamau i hoʻohana ʻia i nā ʻoihana like ʻole, me nā lāʻau lapaʻau, nā mea hoʻonaninani, a me nā meaʻai.E like me ka nui o nā polymers, hilinaʻi kona kūpaʻa wela a me ka mahana hoʻohaʻahaʻa i kekahi mau mea e like me ke kaumaha molekala, ka pae o ka hoʻololi ʻana, ke alo o nā mea hoʻohui, a me nā kūlana hana.Eia nō naʻe, e hāʻawi wau iā ʻoe i kahi ʻike o nā kumu e hoʻopiʻi ai i ka hoʻohaʻahaʻa wela o ka HPC, kona pae wela hoʻohaʻahaʻa maʻamau, a me kekahi o kāna mau noi.
1. Hana Kemika o HPC:
ʻO ka hydroxypropyl cellulose he mea ia o ka cellulose i loaʻa ma ka mālama ʻana i ka cellulose me ka propylene oxide.Hāʻawi kēia hoʻololi kemika i ka solubility a me nā waiwai makemake ʻē aʻe i ka cellulose, e hoʻohana pono ai i nā noi like ʻole.
2. Nā mea e pili ana i ka hoʻohaʻahaʻa wela:
a.Kaumaha Molekala: ʻOi aku ka nui o ke kaumaha o ka molekala HPC i ʻoi aku ka paʻa o ka wela ma muli o nā ikaika intermolecular ikaika.
b.Degree of Substitution (DS): ʻO ka nui o ka hydroxypropyl substitution ka hopena i ka paʻa wela o ka HPC.Hiki i ka DS kiʻekiʻe ke alakaʻi i ka haʻahaʻa haʻahaʻa haʻahaʻa ma muli o ka piʻi ʻana o ka haʻahaʻa i ka wehe ʻana o ka wela.
c.Loaʻa i nā mea hoʻohui: Hiki i kekahi mau mea hoʻohui ke hoʻonui i ka paʻa wela o ka HPC ma o ka hana ʻana ma ke ʻano he stabilizer a i ʻole antioxidants, aʻo nā mea ʻē aʻe e hoʻolalelale i ka hōʻino.
d.Nā Kūlana Kaʻina Hana: ʻO nā kūlana ma lalo o ka hana ʻana o ka HPC, e like me ka mahana, ke kaomi, a me ka ʻike ʻana i ka ea a i ʻole nā mea ʻē aʻe reactive, hiki ke hoʻopilikia i kona kūpaʻa wela.
3. Mechanism Degradation Thermal:
ʻO ka hoʻohaʻahaʻa wela o ka HPC ka mea maʻamau i ka haki ʻana o nā mea paʻa glycosidic i ka iwi kuamoʻo cellulose a me ka ʻoki ʻana o nā loulou ether i hoʻokomo ʻia e ka hydroxypropyl substitution.Hiki i kēia kaʻina hana ke hoʻokumu i nā huahana e like me ka wai, carbon dioxide, a me nā hydrocarbons like ʻole.
4. Kūlana maʻamau hoʻohaʻahaʻa wela:
Hiki ke ʻano like ʻole ka mahana hoʻohaʻahaʻa o ka HPC ma muli o nā kumu i ʻōlelo ʻia ma luna.ʻO ka maʻamau, hoʻomaka ka hoʻohaʻahaʻa wela o ka HPC ma kahi o 200°C a hiki ke hoʻomau i nā mahana ma kahi o 300-350°C.Eia nō naʻe, hiki ke hoʻololi i kēia pae ma muli o nā ʻano kikoʻī o ka laʻana HPC a me nā kūlana i ʻike ʻia ai.
5. Nā noi no HPC:
Loaʻa ka Hydroxypropyl cellulose i ka noi ma nā ʻoihana like ʻole:
a.ʻO nā lāʻau lapaʻau: Hoʻohana ʻia ia ma ke ʻano he mānoanoa, binder, kiʻiʻoniʻoni mua, a me ka mea hoʻokuʻu i hoʻokuʻu ʻia i nā ʻano lāʻau lapaʻau e like me nā papa, capsules, a me nā hoʻomākaukau topical.
b.Mea Hoʻomaʻamaʻa: Hoʻohana ʻia ʻo HPC i nā mea hoʻonaninani a me nā huahana mālama pilikino ma ke ʻano he mea mānoanoa, stabilizer, a me nā kiʻiʻoniʻoni mua i nā huahana e like me nā lotions, nā ʻaila, a me nā ʻano hana mālama lauoho.
c.ʻOihana Meaʻai: Ma ka ʻoihana meaʻai, lawelawe ʻo HPC ma ke ʻano he mānoanoa, stabilizer, a me ka emulsifier i nā huahana e like me nā kīʻaha, nā sopa, a me nā mea ʻono.
d.Nā Hana Hana Hana: Hoʻohana pū ʻia ʻo HPC i nā noi ʻoihana like ʻole e like me ka inika, ka uhi, a me nā mea hoʻopili ma muli o kāna hana kiʻiʻoniʻoni a me nā waiwai rheological.
ʻokoʻa ka mahana hoʻohaʻahaʻa wela o ka hydroxypropyl cellulose ma muli o nā mea e like me ke kaumaha molekala, ke degere o ka hoʻololi ʻana, ke alo o nā mea hoʻohui, a me nā kūlana hana.ʻOiai e hoʻomaka ana kona hoʻohaʻahaʻa ʻana ma kahi o 200°C, hiki ke hoʻomau i nā mahana o 300-350°C.He mea koʻikoʻi ka hoʻomaopopo ʻana i nā mea e pili ana i kona kūpaʻa wela no ka hoʻokō ʻana i kāna hana ma nā noi like ʻole ma nā ʻoihana like ʻole.
Ka manawa hoʻouna: Mar-26-2024