He aha ke ʻano kemika o ka polyanionic cellulose

ʻO ka polyanionic cellulose (PAC) he mea hoʻololi kemika o ka cellulose, he polysaccharide kūlohelohe i loaʻa i loko o nā paia o nā mea kanu. Hoʻohana pinepine ʻia ʻo PAC i nā ʻoihana like ʻole, me ka ʻeli ʻana i ka aila, ka hoʻoili ʻana i ka meaʻai, nā lāʻau lapaʻau, a me nā mea hoʻonaninani, ma muli o kāna mau waiwai kemika. ʻO kona ʻano kemika, hoʻolālā, a me nā waiwai e lilo ia i mea hoʻohui pono i nā noi he nui.

Hoʻolālā Cellulose:

ʻO ka Cellulose kahi polysaccharide laina i haku ʻia me nā ʻāpana hou o nā molekole β-D-glucose i hoʻopili ʻia e nā paʻa glycosidic β(1→4). Loaʻa i kēlā me kēia ʻāpana glucose ʻekolu mau pūʻulu hydroxyl (-OH), he mea koʻikoʻi no ka hoʻololi kemika.

Hoʻololi Kemika:

Hana ʻia ka polyanionic cellulose ma o ka hoʻololi kemika o cellulose. ʻO ke kaʻina hana hoʻololi e pili ana i ka hoʻokomo ʻana i nā hui anionic ma luna o ka iwi kuamoʻo cellulose, e hāʻawi ana iā ia me nā waiwai kikoʻī. ʻO nā ʻano hana maʻamau no ka hoʻololi ʻana i ka cellulose e pili ana i ka etherification a me ka esterification reactions.

Nā Pūʻulu Anionic:

ʻO nā hui anionic i hoʻohui ʻia i ka cellulose i ka wā o ka hoʻololi ʻana e hāʻawi i nā waiwai polyanionic i ka polymer hopena. Hiki i kēia mau pūʻulu ke komo i nā hui carboxylate (-COO⁻), sulfate (-OSO₃⁻), a i ʻole phosphate (-OPO₃⁻). ʻO ke koho o ka hui anionic e pili ana i nā waiwai i makemake ʻia a me nā noi i manaʻo ʻia o ka polyanionic cellulose.

Ka Hui Kimia o PAC:

ʻOkoʻa ke ʻano kemika o ka polyanionic cellulose ma muli o ke ʻano synthesis kikoʻī a me ka noi i manaʻo ʻia. Eia nō naʻe, ma ka laulā, ʻo ka PAC ka mea nui o ka iwi kuamoʻo cellulose me nā hui anionic i hoʻopili ʻia me ia. ʻO ke degere o ka hoʻololi ʻana (DS), e pili ana i ka helu awelika o nā pūʻulu anionic i kēlā me kēia ʻāpana glucose, hiki ke ʻokoʻa a hoʻololi nui i nā waiwai o PAC.

Ka Laʻana Hana Kemika:

ʻO kahi laʻana o ka hana kemika o ka polyanionic cellulose me nā hui carboxylate penei:

ʻO ka Polyanionic Cellulose Structure

I loko o kēia hale, hōʻike nā pōʻai polū i nā ʻāpana glucose o ka iwi kuamoʻo cellulose, a ʻo nā pōʻai ʻulaʻula e hōʻike ana i nā hui anionic carboxylate (-COO⁻) i hoʻopili ʻia i kekahi o nā ʻāpana glucose.

Nā waiwai:

Hōʻike ka polyanionic cellulose i nā waiwai i makemake ʻia, e like me:

Hoʻololi Rheology: Hiki iā ia ke hoʻomalu i ka viscosity a me ka nalowale o ka wai i nā noi like ʻole, e like me ka hoʻoheheʻe wai i ka ʻoihana ʻaila.

Paʻa wai: Hiki i ka PAC ke komo a mālama i ka wai, e hoʻohana pono i nā huahana e koi ana i ka mālama ʻana i ka wai, e like me nā huahana meaʻai a i ʻole nā ​​​​mea hana lāʻau.

Paʻa: Hoʻonui ia i ka paʻa a me ka hana i nā ʻano hana like ʻole ma ka pale ʻana i ka hoʻokaʻawale ʻana a i ʻole ka hui ʻana.

Biocompatibility: Ma nā noi he nui, he biocompatible a ʻaʻohe mea ʻawaʻawa ʻo PAC, kūpono ia no ka hoʻohana ʻana i nā lāʻau lapaʻau a me nā huahana meaʻai.

Nā noi:

Loaʻa ka polyanionic cellulose i nā noi i nā ʻoihana like ʻole:

ʻO ka wai ʻaila ʻaila: ʻO ka PAC kahi mea hoʻohui nui i ka ʻeli ʻana i ka lepo e hoʻomalu i ka viscosity, ka poho wai, a me ka pale ʻana i ka shale.

Ka hana ʻana i ka meaʻai: Hoʻohana ʻia ia ma ke ʻano he mānoanoa, stabilizer, a i ʻole ka mea mālama wai i nā huahana meaʻai e like me nā kīʻaha, nā lole, a me nā mea inu.

ʻO nā lāʻau lapaʻau: lawelawe ʻo PAC ma ke ʻano he binder, disintegrant, a i ʻole viscosity modifier i loko o nā papa papa, hoʻokuʻu ʻia, a me nā ʻaila topical.

Mea hoʻomaʻemaʻe: Hoʻohana ʻia ia i nā huahana mālama pilikino e like me ka ʻaila, nā lotion, a me nā shampoos e hāʻawi i ka mana viscosity a me ka paʻa.

Hana ʻia:

ʻO ke kaʻina hana o ka polyanionic cellulose e pili ana i kekahi mau pae:

ʻO ka cellulose sourcing: ʻO ka cellulose ka mea maʻamau i loaʻa mai ka pulp lāʻau a i ʻole nā ​​lints pulupulu.

Hoʻololi kemika: Loaʻa ka cellulose i ka etherification a i ʻole esterification reactions e hoʻokomo i nā hui anionic i nā ʻāpana glucose.

Hoʻomaʻemaʻe: Hoʻomaʻemaʻe ʻia ka cellulose i hoʻololi ʻia e wehe i nā haumia a me nā huahana.

Hoʻomaloʻo a hoʻopaʻa ʻia: Hoʻomaloʻo ʻia ka polyanionic cellulose i hoʻomaʻemaʻe ʻia no ka hāʻawi ʻana i nā ʻoihana like ʻole.

ʻO ka polyanionic cellulose he mea hoʻololi kemika o ka cellulose me nā hui anionic i pili i ka iwi kuamoʻo. ʻO kāna ʻano kemika, me ke ʻano a me ka nui o nā pūʻulu anionic, e hoʻoholo i kona mau waiwai a me ke kūpono no nā noi like ʻole i nā ʻoihana e like me ka hoʻoheheʻe ʻana i ka aila, ka hana ʻai, nā lāʻau lapaʻau, a me nā mea hoʻonaninani. Ma o ka mana pololei o kāna synthesis a me ka hoʻokumu ʻana, ke hoʻomau nei ka polyanionic cellulose i mea hoʻohui nui i nā huahana a me nā kaʻina hana a puni ka honua.