ʻO Carboxymethylcellulose (CMC) kahi mea hoʻohui hana i hoʻohana nui ʻia ma nā ʻoihana like ʻole e like me ka meaʻai, nā lāʻau lapaʻau, ka hana pepa, nā lole, a me ka hana ʻeli ʻana. Loaʻa ia mai ka cellulose kūlohelohe, ka mea i nui i nā mea kanu a me nā mea olaola ʻē aʻe. He polymer wai-soluble ʻo CMC me nā waiwai kūikawā e like me ka viscosity, hydration, adhesion a me ka adhesion.
Nā ʻano CMC
He hua cellulose derivative ka CMC i hoʻololi ʻia me ke kemika ma ka hoʻokomo ʻana i nā hui carboxymethyl i loko o kona ʻano. Hoʻonui kēia hoʻololi i ka solubility a me ka hydrophilicity o ka cellulose, no laila e hoʻomaikaʻi ana i ka hana. Pili nā waiwai o kahi CMC i kona kekelē o ka pani ʻana (DS) a me ke kaumaha molekala (MW). Ua wehewehe ʻia ʻo DS ʻo ia ka helu awelika o nā hui carboxymethyl no kēlā me kēia glucose unit i loko o ka cellulose backbone, ʻoiai ʻo MW e hōʻike ana i ka nui a me ka hoʻolaha ʻana o nā kaulahao polymer.
ʻO kekahi o nā waiwai koʻikoʻi o CMC ʻo ia kona solubility wai. He maʻalahi ka hoʻoheheʻe ʻia ʻana o CMC i ka wai, e hana ana i kahi hopena viscous me nā waiwai pseudoplastic. Loaʻa kēia ʻano rheological mai nā pilina intermolecular ma waena o nā molekala CMC, e hopena ana i ka emi ʻana o ka viscosity ma lalo o ke kaumaha shear. ʻO ke ʻano pseudoplastic o nā hopena CMC e kūpono iā lākou no nā ʻano hana like ʻole e like me nā thickeners, stabilizers, a me nā suspending agents.
ʻO kekahi ʻano koʻikoʻi o CMC ʻo ia kona hiki ke hana i kahi kiʻiʻoniʻoni. Hiki ke hoʻolei ʻia nā hopena CMC i loko o nā kiʻiʻoniʻoni me nā waiwai mechanical maikaʻi loa, ka transparency, a me ka maʻalahi. Hiki ke hoʻohana ʻia kēia mau kiʻiʻoniʻoni e like me nā uhi, nā laminates a me nā mea hoʻopili.
Eia kekahi, loaʻa i ka CMC nā waiwai hoʻopili maikaʻi a me ka hoʻopili ʻana. Hoʻokumu ia i kahi pilina ikaika me nā ʻili like ʻole, me ka lāʻau, ka metala, ka palakiko a me ka lole. Ua alakaʻi kēia waiwai i ka hoʻohana ʻana o CMC i ka hana ʻana o nā uhi, nā mea hoʻopili a me nā ʻīnika.
ʻO ka mānoanoa CMC
ʻO ka mānoanoa o nā hopena CMC e pili ana i kekahi mau mea e like me ka nui, DS, MW, mahana, a me ka pH. Ma keʻano laulā, hōʻike nā hopena CMC i nā viscosities kiʻekiʻe ma nā nui kiʻekiʻe, DS, a me MW. Hoʻonui pū ka viscosity me ka emi ʻana o ka mahana a me ka pH.
Hoʻomalu ʻia ka mānoanoa o nā hopena CMC e ka pilina ma waena o nā kaulahao polymer a me nā molekala solvent i loko o ka hopena. Hoʻopili nā molekala CMC me nā molekala wai ma o nā pilina hydrogen, e hana ana i kahi pūpū hydration a puni nā kaulahao polymer. Hoʻemi kēia pūpū hydration i ka neʻe ʻana o nā kaulahao polymer, a laila e hoʻonui ana i ka mānoanoa o ka hopena.
ʻO ke ʻano rheological o nā hopena CMC ua hōʻike ʻia e nā piʻo kahe, e wehewehe ana i ka pilina ma waena o ke koʻikoʻi shear a me ka wikiwiki shear o ka hopena. Hōʻike nā hopena CMC i ke ʻano kahe ʻaʻole Newtonian, ʻo ia hoʻi ke loli nei ko lākou viscosity me ka wikiwiki shear. Ma nā wikiwiki shear haʻahaʻa, ʻoi aku ke kiʻekiʻe o ka viscosity o nā hopena CMC, ʻoiai ma nā wikiwiki shear kiʻekiʻe, emi ka viscosity. ʻO kēia ʻano shear thinning ma muli o nā kaulahao polymer e hoʻonohonoho ana a me ke kīkoʻo ʻana ma lalo o ke koʻikoʻi shear, e hopena ana i ka emi ʻana o nā mana intermolecular ma waena o nā kaulahao a me ka emi ʻana o ka viscosity.
Ka hoʻohana ʻana o CMC
Hoʻohana nui ʻia ʻo CMC ma nā ʻano like ʻole ma muli o kona mau waiwai kū hoʻokahi a me ke ʻano rheological. I ka ʻoihana meaʻai, hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻomānoanoa, mea hoʻopaʻa, emulsifier a me ka mea hoʻomaikaʻi ʻano. Hoʻohui ʻia ia i nā meaʻai e like me ka ice cream, nā mea inu, nā mea ʻono a me nā mea i hoʻomoʻa ʻia e hoʻomaikaʻi i ko lākou ʻano, kūlike a me ke ola o ka papa. Pale pū ʻo CMC i ka hoʻokumu ʻia ʻana o nā kristal hau i nā meaʻai hau, e hopena ana i kahi huahana palupalu a creamy.
I ka ʻoihana lāʻau lapaʻau, hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻopaʻa, mea hoʻoheheʻe a me ka mea hoʻokuʻu i kāohi ʻia i nā ʻano papa. Hoʻomaikaʻi i ka compressibility a me ke kahe o ka pauka a hōʻoia i ka like a me ke kūpaʻa o nā papa. Ma muli o kona mau waiwai mucoadhesive a me bioadhesive, hoʻohana ʻia ʻo CMC ma ke ʻano he excipient i nā ʻano ophthalmic, nasal, a me ka waha.
I ka ʻoihana pepa, hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻohui hopena pulu, mea hoʻopaʻa uhi a me ka mea paʻi nui. Hoʻomaikaʻi ia i ka paʻa ʻana o ka pulp a me ka hoʻokahe ʻana, hoʻonui i ka ikaika a me ka mānoanoa o ka pepa, a hāʻawi i kahi ʻili laumania a ʻālohilohi. Hana pū ʻo CMC ma ke ʻano he pale wai a me ka ʻaila, e pale ana i ka ʻīnika a i ʻole nā wai ʻē aʻe mai ke komo ʻana i loko o ka pepa.
I loko o ka ʻoihana lole, hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻonui nui, mea hoʻomānoanoa paʻi, a me ke kōkua hoʻoluʻu. Hoʻomaikaʻi ia i ka hoʻopili ʻana o ka fiber, hoʻonui i ke komo ʻana o ke kala a me ka hoʻopaʻa ʻana, a hoʻemi i ka friction a me nā wrinkles. Hāʻawi pū ʻo CMC i ka palupalu a me ka paʻakikī i ka lole, ma muli o ka DS a me MW o ka polymer.
I ka ʻoihana mining, hoʻohana ʻia ʻo CMC ma ke ʻano he flocculant, inhibitor a me ka rheology modifier i ka hana mineral. Hoʻomaikaʻi ia i ka hoʻonohonoho ʻana a me ka kānana ʻana o nā mea paʻa, hoʻemi i ka hoʻokaʻawale ʻana mai ka gangue lanahu, a kāohi i ka viscosity suspension a me ke kūpaʻa. Hoʻemi pū ʻo CMC i ka hopena o ke kaiapuni o ke kaʻina hana mining ma ka hoʻemi ʻana i ka hoʻohana ʻana i nā kemika ʻawahia a me ka wai.
i ka hopena
He mea hoʻohui waiwai nui a waiwai nui ʻo CMC e hōʻike ana i nā waiwai kū hoʻokahi a me ka viscosity ma muli o kona ʻano kemika a me ka launa pū ʻana me ka wai. ʻO kona solubility, ka hiki ke hana i ka kiʻiʻoniʻoni, nā waiwai nakinaki a me ka hoʻopili ʻana e kūpono ia no nā noi like ʻole ma nā ʻoihana meaʻai, lāʻau lapaʻau, pepa, lole a me ka mining. Hiki ke hoʻomalu ʻia ka viscosity o nā hopena CMC e kekahi mau mea, e like me ka concentration, DS, MW, mahana, a me pH, a hiki ke ʻike ʻia e kāna ʻano pseudoplastic a me ka shear-thinning. He hopena maikaʻi ko CMC i ka maikaʻi, ka pono a me ka hoʻomau ʻana o nā huahana a me nā kaʻina hana, e lilo ia i ʻāpana koʻikoʻi o ka ʻoihana hou.
Ka manawa hoʻouna: Sep-25-2023