ʻO Carboxymethyl cellulose (CMC) he polymer me ka waiwai ʻoihana koʻikoʻi. ʻO ia ka anionic cellulose ether i loaʻa mai ka cellulose maoli. ʻO Cellulose kekahi o nā polymers organik nui loa i ke ʻano a ʻo ia ka mea nui o nā paia o nā mea kanu. ʻAʻole hiki ke hoʻoheheʻe ʻia ʻo Cellulose iā ia iho i ka wai, akā ma o ka hoʻololi kemika, hiki ke hoʻololi ʻia ka cellulose i nā derivatives me ka solubility wai maikaʻi, a ʻo CMC kekahi o lākou.
Loaʻa ke ʻano molekole o CMC ma o ka hoʻoheheʻe ʻana i ka ʻāpana hydroxyl (—OH) o ka mole cellulose me ka waikawa chloroacetic (ClCH2COOH) e hoʻohua ai i kahi carboxymethyl substituent (—CH2COOH). Hoʻopaʻa ke ʻano o CMC i ke kaulahao β-1,4-glucose o ka cellulose, akā ua pani ʻia kekahi o nā hui hydroxyl i loko e nā hui carboxymethyl. No laila, mālama ʻo CMC i nā ʻano kaulahao polymer o cellulose a loaʻa iā ia ka hana o ka hui carboxymethyl.
Nā waiwai kemika o CMC
ʻO CMC kahi polymer anionic. No ka mea hiki i ka hui carboxyl (—CH2COOH) i loko o kona ʻano ke hoʻoheheʻe ʻia e hoʻohua i nā koina maikaʻi ʻole i ka hoʻonā wai, hiki i ka CMC ke hana i ka hopena colloidal paʻa ma hope o ka hoʻoheheʻe ʻana i ka wai. Hoʻopili ʻia ka hoʻoheheʻe wai a me ka solubility o CMC e kona degere o ka hoʻololi ʻana (DS) a me ka degere o ka polymerization (DP). ʻO ke degere o ka hoʻololi ʻana e pili ana i ka helu o nā pūʻulu hydroxyl i pani ʻia e nā hui carboxyl i kēlā me kēia ʻāpana glucose. ʻO ka maʻamau, ʻoi aku ka kiʻekiʻe o ka hoʻololi ʻana, ʻoi aku ka maikaʻi o ka hoʻoheheʻe wai. Eia kekahi, ʻokoʻa ka solubility a me ka viscosity o CMC i nā waiwai pH like ʻole. ʻO ka mea maʻamau, hōʻike ia i ka solubility maikaʻi a me ke kūpaʻa ma lalo o nā kūlana kūʻokoʻa a i ʻole ka alkaline, ʻoiai ma lalo o nā kūlana acidic, e emi ana ka solubility o CMC a hiki i ka precipitate.
Nā waiwai kino o CMC
ʻO ka viscosity o ka hoʻonā CMC kekahi o kāna mau waiwai kino koʻikoʻi. Ua pili kona viscosity i nā mea he nui, e like me ka hoʻonā ʻana o ka hopena, ke degere o ka hoʻololi ʻana, ke degere o ka polymerization, ka mahana a me ka waiwai pH. ʻO kēia hiʻohiʻona viscosity o CMC hiki iā ia ke hōʻike i ka mānoanoa, gelling a me ka hoʻomau i nā hopena i nā noi he nui. Loaʻa i ka viscosity o CMC nā hiʻohiʻona o ka shear thinning, ʻo ia hoʻi, e emi ana ka viscosity ma lalo o ka ikaika shear kiʻekiʻe, kahi e pono ai i kekahi mau noi e koi ai i ka wai kiʻekiʻe.
Nā wahi noi o CMC
Ma muli o kāna mau waiwai kino a me kemika, hoʻohana nui ʻia ʻo CMC i nā kula he nui. Eia kekahi o nā wahi noi nui:
ʻOihana meaʻai: Hoʻohana ʻia ʻo CMC ma ke ʻano he mānoanoa, stabilizer a me ka emulsifier i ka ʻoihana meaʻai. Hiki iā ia ke hoʻomaikaʻi i ke ʻano a me ke kūpaʻa o ka meaʻai, e like me nā noi maʻamau i loko o ka ice cream, yogurt, jelly and sauce.
ʻOihana lāʻau lapaʻau: Hoʻohana ʻia ʻo CMC ma ke ʻano he excipient no nā lāʻau lapaʻau a me kahi mea hoʻopili no nā papa ma ke kahua lāʻau lapaʻau. Hoʻohana ʻia ʻo ia ma ke ʻano he moisturizer a me ka mea hana kiʻiʻoniʻoni i nā lole ʻeha.
Nā kemika o kēlā me kēia lā: I nā huahana o kēlā me kēia lā e like me ka toothpaste, shampoo, detergent, a me nā mea ʻē aʻe, hoʻohana ʻia ʻo CMC ma ke ʻano he mānoanoa, suspending agent a stabilizer e kōkua i ka huahana e mālama i ka helehelena maikaʻi a me ka hana.
ʻO ka ʻaila ʻaila: Hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻonui viscosity a me ka mea kānana i nā wai hoʻoheheʻe ʻaila, hiki ke hoʻomaikaʻi i nā waiwai rheological o nā wai wili a pale i ka komo nui ʻana o nā wai wili.
ʻO nāʻoihana lole a me nā pepa: Ma kaʻoihana lole, hoʻohanaʻia ka CMC no ka pulp textile a me ka hoʻopauʻana i nā mea hana,ʻoiai ma kaʻoihana hana pepa, hoʻohanaʻiaʻo ia ma keʻano he mea hoʻoikaika a me ka nui o ka pepa e hoʻonui ai i ka ikaika a me ka maʻalahi o ka pepa.
Ka palekana a me ka palekana
ʻO CMC kahi mea pili i ke kaiapuni i hiki ke hoʻohaʻahaʻa ʻia e nā microorganism ma ke ʻano, no laila ʻaʻole ia e hoʻohaumia i ka wā lōʻihi. Eia kekahi, he haʻahaʻa haʻahaʻa ka CMC a me ka palekana kiʻekiʻe, a he moʻolelo palekana maikaʻi i ka meaʻai a me nā noi lāʻau. Eia nō naʻe, ma muli o kāna hana nui a me ka hoʻohana ʻana, pono e uku ʻia i ka mālama ʻana i nā ʻōpala kemika i hana ʻia i ka wā o kāna hana hana.
ʻO Carboxymethyl cellulose (CMC) kahi polymer anionic hiki ke hoʻololi i ka wai. ʻO ka CMC i loaʻa ma ka hoʻololi kemika e mālama i nā waiwai maikaʻi loa o ka cellulose kūlohelohe ʻoiai e loaʻa ana ka solubility wai maikaʻi a me nā waiwai kino a me nā mea kemika. Me kona mānoanoa, gelling, stabilization a me nā hana ʻē aʻe, ua hoʻohana nui ʻia ʻo CMC i nā ʻoihana he nui e like me ka meaʻai, ka lāʻau lapaʻau, nā kemika o kēlā me kēia lā, ka ʻaila hinu, nā textiles a me ka hana pepa. ʻO kona palekana kaiapuni a me ka palekana e lilo ia i mea hoʻohui makemake i nā huahana he nui.
Ka manawa hoʻouna: ʻAukake-23-2024