Ka ʻokoʻa ma waena o CMC a me HPMC

ʻO Carboxymethyl cellulose (CMC) a me ka hydroxypropyl methylcellulose (HPMC) ʻelua ʻano o ka cellulose derivatives i hoʻohana nui ʻia i ka meaʻai, lāʻau lapaʻau, a me nā ʻoihana mālama pilikino. ʻOiai ua hoʻohana ʻia nā mea ʻelua e like me nā mānoanoa, stabilizers, a me nā emulsifiers, aia kekahi mau ʻokoʻa koʻikoʻi ma waena o CMC a me HPMC e kūpono ai lākou no nā noi like ʻole. Ma kēia ʻatikala, e kūkākūkā mākou i nā ʻokoʻa ma waena o CMC a me HPMC e pili ana i kā lākou hana kemika, waiwai, hoʻohana, a me ka palekana.

1. Hoʻolālā Kimia

ʻO ka CMC kahi polymer hiki ke hoʻoheheʻe ʻia i ka wai i loaʻa mai ka cellulose, he polymer kūlohelohe i loaʻa i nā paia o nā mea kanu. Hōʻike ʻia ke ʻano kemika o CMC e nā hui carboxymethyl (-CH2-COOH) i hoʻopili ʻia i ka iwi kuamoʻo cellulose. ʻO ke degere o ka hoʻololi ʻana (DS) o CMC e pili ana i ka helu o nā hui carboxymethyl i loaʻa i kēlā me kēia anhydroglucose unit (AGU) o ka iwi kuamoʻo cellulose. Hiki i ka DS o CMC ke hele mai ka 0.2 a i ka 1.5, me nā koina DS kiʻekiʻe e hōʻike ana i kahi kiʻekiʻe o ka hoʻololi.

ʻO ka HPMC kekahi polymer hiki ke hoʻoheheʻe ʻia i ka wai i loaʻa mai ka cellulose. Eia naʻe, ʻaʻole like me CMC, hoʻololi ʻia ka HPMC me nā hui hydroxypropyl a me methyl. Hoʻopili ʻia nā pūʻulu hydroxypropyl (-OCH2CHOHCH3) i nā pūʻulu hydroxyl ma ka iwi kuamoʻo cellulose, aʻo nā hui methyl (-CH3) e pili ana i nā hui hydroxypropyl. ʻO ke degere o ka hoʻololi ʻana o HPMC e pili ana i ka helu o nā hui hydroxypropyl a me methyl i loaʻa i kēlā me kēia AGU o ka iwi kuamoʻo cellulose. Hiki ke DS o HPMC mai ka 0.1 a hiki i ka 3.0, me nā koina DS kiʻekiʻe e hōʻike ana i kahi kiʻekiʻe o ka hoʻololi.

2. Waiwai

Loaʻa iā CMC a me HPMC nā waiwai like ʻole e kūpono ai i nā noi like ʻole. Aia kekahi o nā waiwai koʻikoʻi o CMC a me HPMC ma lalo nei:

a. Solubility: Hiki ke hoʻoheheʻe ʻia ka CMC i ka wai a hoʻohua i nā hāʻina maʻemaʻe. Hiki ke hoʻoheheʻe ʻia ka HPMC i ka wai, akā hiki ke hoʻoheheʻe ʻia nā hopena ma muli o ke ʻano o ka hoʻololi ʻana.

b. Rheology: He mea pseudoplastic ka CMC, ʻo ia hoʻi, hōʻike ʻo ia i ke ʻano ʻoki ʻoki. ʻO ia ke ʻano o ka emi ʻana o ka viscosity o CMC i ka piʻi ʻana o ka shear rate. ʻO HPMC, ma ka ʻaoʻao ʻē aʻe, he mea Newtonian, ʻo ia hoʻi, e mau ana kona viscosity me ka nānā ʻole i ka nui o ka shear rate.

c. Nā waiwai hana kiʻiʻoniʻoni: Loaʻa i ka CMC nā waiwai hana kiʻiʻoniʻoni maikaʻi, i kūpono ia no ka hoʻohana ʻana i nā uhi a me nā kiʻiʻoniʻoni. Loaʻa i ka HPMC nā waiwai hana kiʻiʻoniʻoni, akā hiki i nā kiʻiʻoniʻoni ke maʻalahi a hiki i ka pohā.

d. Paʻa: Paʻa ka CMC ma luna o kahi ākea o ka pH a me nā kūlana wela. Paʻa pū ka HPMC ma kahi ākea pH ākea, akā hiki ke hoʻopili ʻia kona kūpaʻa e nā wela kiʻekiʻe.

3. Hoʻohana

Hoʻohana ʻia ʻo CMC a me HPMC i ka nui o nā noi i ka ʻoihana meaʻai, lāʻau lapaʻau, a me nā ʻoihana mālama pilikino. Aia kekahi o nā hoʻohana nui o CMC a me HPMC ma lalo nei:

a. ʻOihana meaʻai: Hoʻohana maʻamau ʻia ʻo CMC ma ke ʻano he mānoanoa, stabilizer, a me ka emulsifier i nā huahana meaʻai e like me ka ice cream, nā pāpale salakeke, a me nā meaʻai i kālua ʻia. Hoʻohana ʻia ʻo HPMC ma ke ʻano he mānoanoa a me ka stabilizer i nā huahana meaʻai, akā ʻoi aku ka maʻamau o ka hoʻohana ʻana ma ke ʻano he mea uhi no nā huahana confectionery e like me nā candies gummy a me nā kokoleka.

b. ʻOihana lāʻau lapaʻau: Hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻopaʻa, disintegrant, a me ka mea hoʻopili papa papa i nā hana lāʻau lapaʻau. Hoʻohana ʻia ʻo HPMC ma ke ʻano he mea hoʻopaʻa, disintegrant, a me ka mea hoʻopili papa i loko o nā ʻano lāʻau lapaʻau.