Ua like anei ka carboxymethyl cellulose a me ka sodium carboxymethyl cellulose?

ʻO Carboxymethyl cellulose (CMC) a me ka sodium carboxymethyl cellulose (CMC-Na) he mau pūhui maʻamau i ka ʻoihana kemika a me ka ʻoihana meaʻai. Loaʻa iā lākou kekahi mau ʻokoʻa a me nā pilina ma ke ʻano, ka hana a me ka hoʻohana. E nānā kikoʻī kēia ʻatikala i nā waiwai, nā ʻano hoʻomākaukau, nā noi a me ke koʻikoʻi o nā mea ʻelua ma nā ʻano like ʻole.

(1) Carboxymethyl cellulose (CMC)

1. Nā waiwai kumu
ʻO ka Carboxymethyl cellulose (CMC) he carboxymethylated derivative o cellulose a he anionic linear polysaccharide. ʻO kona ʻano kumu, ua hoʻololi ʻia kekahi mau pūʻulu hydroxyl (-OH) i loko o ka molekole cellulose e nā hui carboxymethyl (-CH₂-COOH), a laila hoʻololi i ka solubility a me nā waiwai hana o cellulose. He keʻokeʻo maʻamau ka CMC a hiki i ka pauka melemele iki, ʻaʻohe ʻono a ʻono ʻole, ʻaʻole hiki ke hoʻoheheʻe ʻia i loko o nā mea hoʻoheheʻe kūlohelohe, akā hiki ke komo i ka wai a lilo i gel.

2. Keʻano hoʻomākaukau
ʻO ka hoʻomākaukau ʻana i ka CMC maʻamau e komo i nā pae aʻe:
Pane Alkalinization: Hoʻohui i ka cellulose me ka sodium hydroxide (NaOH) e hoʻololi i nā pūʻulu hydroxyl i cellulose i mau paʻakai alkaline.
Pane hoʻoheheʻe: Hoʻopili ka cellulose alkali me ka waikawa chloroacetic (ClCH₂COOH) e hana i ka carboxymethyl cellulose a me ka sodium chloride (NaCl).
Hana ʻia kēia kaʻina hana i loko o ka wai a i ʻole ka ethanol solution, a mālama ʻia ka mahana hopena ma waena o 60 ℃-80 ℃. Ma hope o ka pau ʻana o ka hopena, loaʻa ka huahana CMC hope ma o ka holoi ʻana, kānana, hoʻomaloʻo a me nā hana ʻē aʻe.

3. Nā kahua noi
Hoʻohana nui ʻia ʻo CMC i ka ʻoihana meaʻai, lāʻau lapaʻau, textile, papermaking a me nā māla ʻē aʻe. Loaʻa iā ia nā hana he nui e like me ka mānoanoa, stabilization, mālama wai a me ka hana kiʻiʻoniʻoni. No ka laʻana, i ka ʻoihana meaʻai, hiki ke hoʻohana ʻia ʻo CMC ma ke ʻano he mānoanoa, stabilizer a me ka emulsifier no ka ice cream, jam, yogurt a me nā huahana ʻē aʻe; i ka lāʻau lapaʻau, hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻopaʻa, mānoanoa a me ka stabilizer no nā lāʻau lapaʻau; i loko o nā ʻoihana textile a me ka hana pepa, hoʻohana ʻia ʻo CMC ma ke ʻano he slurry additive a me ka surface sizing agent e hoʻomaikaʻi i ka maikaʻi a me ke kūpaʻa o ka huahana.

(2) Sodium carboxymethyl cellulose (CMC-Na)

1. Nā waiwai kumu
ʻO ka sodium carboxymethyl cellulose (CMC-Na) ka ʻano paʻakai sodium o ka carboxymethyl cellulose. Hoʻohālikelike ʻia me CMC, ʻoi aku ka maikaʻi o ka hoʻoheheʻe wai ʻo CMC-Na. ʻO kona ʻano kumu, ʻo nā pūʻulu carboxylmethyl ma CMC ua hoʻololi ʻia i loko o kā lākou paʻakai sodium, ʻo ia hoʻi, ua pani ʻia nā ʻātoma hydrogen ma nā pūʻulu carboxylmethyl e nā ion sodium (Na⁺). ʻO ka CMC-Na ka pauka keʻokeʻo a i ʻole ka melemele liʻiliʻi a i ʻole nā ​​granule, hiki ke hoʻoheheʻe ʻia i ka wai, a hana i kahi hopena ʻālohilohi.

2. Keʻano hoʻomākaukau
ʻO ke ʻano o ka hoʻomākaukau ʻana o CMC-Na ua like ia me ka CMC, a ʻo nā ʻanuʻu nui e pili ana:
ʻO ka hopena alkalinization: hoʻohana ʻia ka cellulose me ka sodium hydroxide (NaOH).
Pane hoʻoheheʻe: Hoʻopili ʻia ka cellulose alkali me ka waikawa chloroacetic (ClCH₂COOH) e hana i ka CMC.
ʻO ka hopena o ka sodium: ua hoʻololi ʻia ʻo CMC i kona ʻano paʻakai sodium ma o ka hoʻoneʻe ʻana i ka wai.
Ma kēia kaʻina hana, pono e hoʻolohe i ka mālama ʻana i nā kūlana hopena, e like me ka pH a me ka mahana, e kiʻi i nā huahana CMC-Na me ka hana maikaʻi loa.

3. Nā kahua noi
He ākea loa nā kahua noi o CMC-Na, e uhi ana i nā ʻoihana he nui e like me ka meaʻai, ka lāʻau lapaʻau, nā kemika i kēlā me kēia lā, a me ka ʻaila. I ka ʻoihana meaʻai, CMC-Na he mea nui mānoanoa, stabilizer a me ka emulsifier, a ua hoʻohana nui ʻia i nā huahana dairy, wai, condiments, etc. . I ka ʻoihana kemika i kēlā me kēia lā, hoʻohana ʻia ʻo CMC-Na i nā huahana e like me ka toothpaste, shampoo, a me ka conditioner, a he maikaʻi ka mānoanoa a me ka hoʻopaʻa ʻana i nā hopena. Eia kekahi, i ka ʻaila ʻaila, hoʻohana ʻia ʻo CMC-Na ma ke ʻano he mānoanoa a me ka rheology regulator no ka wili ʻana i ka lepo, hiki ke hoʻomaikaʻi i ka wai a me ka paʻa o ka lepo.

(3) ʻO ka ʻokoʻa a me ka pilina ma waena o CMC a me CMC-Na
1. Hoʻolālā a me nā waiwai
ʻO ka ʻokoʻa nui ma waena o CMC a me CMC-Na i loko o ka molecular structure ʻo ia ka hui carboxylmethyl o CMC-Na i ʻāpana a i ʻole i ke ʻano o ka paʻakai sodium. ʻO kēia ʻokoʻa ʻokoʻa e hōʻike ana iā CMC-Na i ka solubility kiʻekiʻe a ʻoi aku ka paʻa o ka wai. ʻO ka CMC maʻamau he ʻāpana a i ʻole carboxymethylated cellulose, ʻoiai ʻo CMC-Na ke ʻano paʻakai sodium o kēia carboxymethyl cellulose.

2. Solubility a me ka hoʻohana
Loaʻa i ka CMC kahi solubility i ka wai, akā ʻoi aku ka maikaʻi o ka solubility ʻo CMC-Na a hiki ke hana i kahi hopena viscous paʻa i ka wai. Ma muli o kona ʻoi aku ka maikaʻi o ka wai a me nā ʻano ionization, hōʻike ʻo CMC-Na i ka hana ʻoi aku ka maikaʻi ma mua o CMC i nā noi he nui. No ka laʻana, i loko o ka ʻoihana meaʻai, hoʻohana nui ʻia ʻo CMC-Na ma ke ʻano he mānoanoa a me ka stabilizer ma muli o kona hoʻoheheʻe wai maikaʻi a me ka viscosity kiʻekiʻe, ʻoiai ʻo CMC e hoʻohana pinepine ʻia i nā noi ʻaʻole pono ka solubility wai kiʻekiʻe.

3. Kaʻina hoʻomākaukau
ʻOiai ua like like nā kaʻina hana hoʻomākaukau o nā mea ʻelua, ʻo ka huahana hope loa o ka hana CMC he carboxymethyl cellulose, ʻoiai ʻo CMC-Na e hoʻohuli hou i ka carboxymethyl cellulose i loko o kona ʻano paʻakai sodium ma o ka hopena neutralization i ka wā o ka hana. Hāʻawi kēia hoʻololi i ka CMC-Na i ka hana ʻoi aku ka maikaʻi ma kekahi mau noi kūikawā, e like me ka hana ʻoi aku ka maikaʻi ma nā noi e koi ana i ka solubility wai a me ke kūpaʻa electrolyte.

ʻO Carboxymethyl cellulose (CMC) a me ka sodium carboxymethyl cellulose (CMC-Na) ʻelua mau mea hoʻoheheʻe cellulose me ka waiwai ʻoihana koʻikoʻi. ʻOiai ua like lākou i ke ʻano, hōʻike ʻo CMC-Na i ka ʻoi aʻe o ka hoʻoheheʻe wai a me ke kūpaʻa ma muli o ka hoʻololi ʻana o kekahi a i ʻole nā ​​hui carboxyl i CMC-Na i ka paʻakai sodium. ʻO kēia ʻokoʻa ka mea i loaʻa iā CMC a me CMC-Na ko lākou pono ponoʻī a me nā hana i nā noi ʻoihana like ʻole. ʻO ka hoʻomaopopo ʻana a me ka hoʻohana pono ʻana i kēia mau mea ʻelua hiki ke kōkua i ka hoʻomaikaʻi ʻana i ka hana huahana a hoʻomaikaʻi i ka pono hana ma nā ʻano he nui e like me ka meaʻai, ka lāʻau lapaʻau, a me ka ʻoihana kemika.