ʻO ka ʻokoʻa ma waena o 1,3 propanediol a me 1,2 propanediol

ʻO 1,3-propanediol a me 1,2-propanediol nā hui organik ʻelua no ka papa o diols, ʻo ia hoʻi he ʻelua mau hui hana hydroxyl (-OH). ʻOiai ko lākou ʻano like, hōʻike lākou i nā waiwai like ʻole a he mau noi like ʻole ma muli o ka hoʻonohonoho ʻana o kēia mau hui hana i loko o ko lākou mau ʻano molekala. 

1,3-Propanediol:

ʻO 1,3-propanediol, i hoʻopōkole pinepine ʻia ʻo 1,3-PDO, he ʻano kemika C3H8O2. He wai kala ʻole, ʻala ʻole, a ʻono ʻole ia i ka mahana o ka lumi. ʻO ka ʻokoʻa nui i kona ʻano, ʻo ia ka waiho ʻana o nā hui hydroxyl ʻelua ma luna o nā ʻātoma kalapona i hoʻokaʻawale ʻia e hoʻokahi ʻātoma kalapona. Hāʻawi kēia i ka 1,3-PDO i kona mau waiwai kūikawā.

Nā Waiwai a me nā Hoʻohana o 1,3-Propanediol:

Mea hoʻoheheʻe:He mea hoʻoheheʻe pono ka 1,3-PDO no nā hui polar a me nonpolar like ʻole ma muli o kona ʻano kemika kū hoʻokahi.

Mea hoʻēmi hau:Hoʻohana pinepine ʻia ia ma ke ʻano he mea antifreeze i nā noi kaʻa a me nā ʻoihana ʻoihana no ka mea he haʻahaʻa kona kiko hau ma mua o ka wai.

Hana ʻana o ka Polymer: Hoʻohana ʻia ka 1,3-PDO i ka hana ʻana o nā polymers biodegradable e like me ka polytrimethylene terephthalate (PTT). Loaʻa i kēia mau biopolymers nā noi i nā lole a me ka hoʻopili ʻana.

1,2-Propanediol:

ʻO 1,2-propanediol, i ʻike ʻia hoʻi ʻo propylene glycol, he C3H8O2 ke ʻano kemika. ʻO ka ʻokoʻa nui, aia kona mau hui hydroxyl ʻelua ma luna o nā ʻātoma kalapona e pili ana i loko o ka mole.

Nā Waiwai a me nā Hoʻohana o 1,2-Propanediol (Propylene Glycol):

Mea Hoʻopau Hau a me ka Mea Hoʻohemo Hau: Hoʻohana pinepine ʻia ka Propylene glycol ma ke ʻano he mea hoʻopau hau i ka hana ʻana i ka meaʻai, ka hoʻomehana ʻana, a me nā ʻōnaehana hoʻoluʻu. Hoʻohana ʻia nō hoʻi ia ma ke ʻano he mea hoʻohemo hau no nā mokulele.

Mea hoʻomaʻemaʻe:Hoʻohana ʻia ia i nā huahana hoʻonani a me nā huahana mālama pilikino like ʻole e like me ka humectant e mālama ai i ka makū.

Mea Hoʻohui Meaʻai:Ua hoʻokaʻawale ʻia ʻo Propylene glycol ma ke ʻano he "ʻike nui ʻia he palekana" (GRAS) e ka US Food and Drug Administration (FDA) a hoʻohana ʻia ma ke ʻano he mea hoʻohui meaʻai, ʻo ia hoʻi he mea lawe no nā ʻono a me nā kala i ka ʻoihana meaʻai.

Nā lāʻau lapaʻau:Hoʻohana ʻia ia i kekahi mau ʻano lāʻau lapaʻau ma ke ʻano he mea hoʻoheheʻe a me ka mea lawe no nā lāʻau lapaʻau.

I ka hōʻuluʻulu manaʻo, ʻo ka ʻokoʻa nui ma waena o 1,3-propanediol a me 1,2-propanediol aia i ka hoʻonohonoho ʻana o kā lākou mau hui hydroxyl i loko o ke ʻano molekala. ʻO kēia ʻokoʻa hoʻonohonoho e alakaʻi i nā waiwai like ʻole a me nā noi like ʻole no kēia mau diols ʻelua, me ka hoʻohana ʻia ʻana o 1,3-propanediol i nā solvents, antifreeze, a me nā polymers biodegradable, ʻoiai ʻo 1,2-propanediol (propylene glycol) e loaʻa nā noi i ka antifreeze, ka meaʻai, nā mea hoʻonani, a me nā lāʻau lapaʻau.