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

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

1,3-Propanediol:

ʻO 1,3-propanediol, i hoʻopau pinepine ʻia ʻo 1,3-PDO, loaʻa ke ʻano kemika C3H8O2.He wai waihoʻoluʻu, ʻala ʻole, a ʻono ʻole i ka lumi wela.ʻO ka ʻokoʻa koʻikoʻi o kona ʻano, aia nā pūʻulu hydroxyl ʻelua ma nā ʻātoma kalapona i hoʻokaʻawale ʻia e hoʻokahi kalapona kalapona.Hāʻawi kēia iā 1,3-PDO i kāna mau waiwai kūʻokoʻa.

Nā waiwai a me nā noi o 1,3-Propanediol:

Mea hoʻoheheʻe:ʻO 1,3-PDO kahi mea hoʻoheheʻe pono no nā pūhui polar a me nā nonpolar ma muli o kāna ʻano kemika kūʻokoʻa.

Antifreeze:Hoʻohana maʻamau ia ma ke ʻano he antifreeze agent i nā kaʻa a me nā noi ʻoihana no ka mea he haʻahaʻa haʻahaʻa haʻahaʻa ma mua o ka wai.

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

1,2-Propanediol:

ʻO 1,2-propanediol, ʻike ʻia hoʻi he propylene glycol, loaʻa ke ʻano kemika C3H8O2 pū kekahi.ʻO ka ʻokoʻa koʻikoʻi, aia kāna mau pūʻulu hydroxyl ʻelua ma nā ʻāpana kalapona pili i loko o ka mole.

Nā waiwai a me nā hoʻohana ʻana o 1,2-Propanediol (Propylene Glycol):

Antifreeze and Deicing Agent: Hoʻohana mau ʻia ka propylene glycol ma ke ʻano he antifreeze i ka hana ʻai, hoʻomehana a me nā ʻōnaehana hoʻomaha.Hoʻohana ʻia ia ma ke ʻano he deicing agent no nā mokulele.

Humectant:Hoʻohana ʻia ia i nā huahana hoʻomaʻemaʻe a me nā huahana mālama pilikino ma ke ʻano he humectant e mālama ai i ka makū.

Mea hoʻohui meaʻai: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 meaʻai meaʻai, ma ke ʻano he mea lawe no nā ʻono a me nā kala i ka ʻoihana meaʻai.

ʻO nā lāʻau lapaʻau:Hoʻohana ʻia ia i loko o kekahi mau lāʻau lapaʻau ma ke ʻano he solvent a me ka lawe ʻana i nā lāʻau lapaʻau.

I ka hōʻuluʻulu ʻana, aia ka ʻokoʻa nui ma waena o 1,3-propanediol a me 1,2-propanediol i ka hoʻonohonoho ʻana o kā lākou mau pūʻulu hydroxyl i loko o ka molecular structure.Ke alakaʻi nei kēia ʻokoʻa ʻokoʻa i nā waiwai ʻokoʻa a me nā noi like ʻole no kēia mau diols ʻelua, me ka 1,3-propanediol i hoʻohana ʻia i nā solvents, antifreeze, a me nā polymers biodegradable, ʻoiai ʻo 1,2-propanediol (propylene glycol) loaʻa nā noi i ka antifreeze, meaʻai, mea hoʻonaninani. , a me nā lāʻau lapaʻau.