Nā waiwai a me ka viscosity o CMC

ʻO Carboxymethylcellulose (CMC) kahi mea hoʻohui hana i hoʻohana nui ʻia i nā ʻoihana like ʻole e like me ka meaʻai, lāʻau lapaʻau, hana pepa, textiles, a me ka mining. Loaʻa ia mai ka cellulose maoli, i nui i nā mea kanu a me nā mea ola ʻē aʻe. ʻO CMC kahi polymer hiki ke hoʻoheheʻe wai me nā waiwai kūʻokoʻa e like me ka viscosity, hydration, adhesion a me ka adhesion.

ʻO nā hiʻohiʻona CMC

ʻO CMC kahi derivative cellulose i hoʻololi ʻia me ka hoʻokomo ʻana i nā hui carboxymethyl i loko o kona ʻano. Hoʻonui kēia hoʻololi i ka solubility a me ka hydrophilicity o cellulose, a laila hoʻomaikaʻi i ka hana. ʻO nā waiwai o kahi CMC e pili ana i kona degere o ka pani ʻana (DS) a me ke kaumaha molekala (MW). Ua wehewehe ʻia ʻo DS ma ke ʻano he helu awelika o nā hui carboxymethyl no kēlā me kēia ʻāpana glucose i ka iwi kuamoʻo cellulose, ʻoiai ʻo MW e hōʻike ana i ka nui a me ka puʻunaue o nā kaulahao polymer.

ʻO kekahi o nā waiwai koʻikoʻi o CMC ʻo ia ka hoʻoheheʻe wai. Hiki ke hoʻoheheʻe ʻia ka CMC i ka wai, e hana ana i kahi hopena viscous me nā waiwai pseudoplastic. Loaʻa kēia ʻano rheological ma muli o ka launa pū ʻana ma waena o nā molekala CMC, ka hopena i ka emi ʻana o ka viscosity ma lalo o ke koʻikoʻi shear. ʻO ke ʻano pseudoplastic o nā hoʻonā CMC e kūpono iā lākou no nā ʻano noi like ʻole e like me nā mānoanoa, stabilizers, a me nā mea hoʻomaha.

ʻO kekahi hiʻohiʻona koʻikoʻi o CMC kona hiki ke hana kiʻiʻoniʻoni. Hiki ke hoʻolei ʻia nā hoʻonā CMC i loko o nā kiʻiʻoniʻoni me nā waiwai mechanical maikaʻi loa, ʻike maopopo, a me ka maʻalahi. Hiki ke hoʻohana ʻia kēia mau kiʻiʻoniʻoni e like me nā uhi, laminates a me nā mea hoʻopili.

Eia kekahi, loaʻa iā CMC nā waiwai hoʻopaʻa paʻa a me nā mea pili. Hoʻokumu ia i kahi paʻa paʻa me nā ʻāpana like ʻole, me ka lāʻau, metala, plastic a me ka lole. Ua alakaʻi kēia waiwai i ka hoʻohana ʻana i ka CMC i ka hana ʻana i nā uhi, adhesives a me nā inika.

CMC viscosity

ʻO ka viscosity o nā hoʻonā CMC e pili ana i kekahi mau mea e like me ka neʻe ʻana, DS, MW, ka mahana, a me ka pH. Ma keʻano laulā, hōʻike nā hāʻina CMC i nā viscosity kiʻekiʻe ma nā kiʻekiʻe kiʻekiʻe, DS, a me MW. Piʻi pū ka viscosity me ka emi ʻana o ka mahana a me ka pH.

Hoʻomalu ʻia ka viscosity o nā hoʻonā CMC e ka pilina ma waena o nā kaulahao polymer a me nā molekala solvent i ka hopena. Hoʻopili nā molekala CMC me nā molekole wai ma o nā paʻa hydrogen, e hana ana i ka pūpū hydration a puni nā kaulahao polymer. Hoʻemi kēia pūpū hydration i ka neʻe ʻana o nā kaulahao polymer, ma laila e hoʻonui ai i ka viscosity o ka hopena.

Hōʻike ʻia ke ʻano rheological o nā hāʻina CMC e nā pihi kahe, e wehewehe ana i ka pilina ma waena o ke koʻikoʻi shear a me ka shear rate o ka hopena. Hōʻike nā hoʻonā CMC i ke ʻano kahe ʻole o Newtonian, ʻo ia hoʻi, hoʻololi ko lākou viscosity me ka nui o ka shear rate. Ma nā haʻahaʻa ʻoki haʻahaʻa, ʻoi aku ka kiʻekiʻe o ka viscosity o nā hāʻina CMC, ʻoiai ma ka nui o ka shear rates, e emi ana ka viscosity. ʻO kēia ʻano hana ʻokiʻoki ma muli o nā kaulahao polymer e hoʻopololei ana a hoʻohola ʻia ma lalo o ke koʻikoʻi shear, e hopena i ka hoʻemi ʻana i nā ikaika intermolecular ma waena o nā kaulahao a me ka emi ʻana o ka viscosity.

Noi o CMC

Hoʻohana nui ʻia ʻo CMC ma nā ʻano ʻokoʻa ma muli o kāna mau waiwai kūʻokoʻa a me kāna ʻano rheological. I ka ʻoihana meaʻai, hoʻohana ʻia ʻo CMC ma ke ʻano he mānoanoa, stabilizer, emulsifier a me ka hoʻomaikaʻi ʻana i ke ʻano. Hoʻohui ʻia ia i nā meaʻai e like me ka ice cream, nā mea inu, nā ʻuala a me nā meaʻai i kālua ʻia e hoʻomaikaʻi i ko lākou ʻano, kūlike a me ke ola paʻa. Kāohi pū ʻo CMC i ka hoʻokumu ʻana o nā kristal hau i loko o nā meaʻai paʻa, e loaʻa ana i kahi huahana ʻoluʻolu a momona.

I ka ʻoihana lāʻau lapaʻau, hoʻohana ʻia ʻo CMC ma ke ʻano he binder, disintegrant a me ka hoʻokuʻu ʻana i ka mea hoʻokuʻu i nā papa papa. E hoʻomaikaʻi i ka compressibility a me ka wai o ka pauka a hōʻoia i ka kūlike a me ka paʻa o nā papa. Ma muli o kāna mau waiwai mucoadhesive a me bioadhesive, hoʻohana ʻia ʻo CMC ma ke ʻano he excipient i ka ophthalmic, nasal, a me ka waha.

I ka ʻoihana pepa, hoʻohana ʻia ʻo CMC ma ke ʻano he mea hoʻohui hoʻohui wai, hoʻopili uhi a me ka mea paʻi nui. Hoʻomaikaʻi ia i ka paʻa ʻana o ka pulp a me ka hoʻoheheʻe ʻana, hoʻonui i ka ikaika o ka pepa a me ka paʻa, a hāʻawi i kahi ʻili laulima a ʻālohilohi. Hana pū ʻo CMC ma ke ʻano he pale wai a me ka aila, e pale ana i ka inika a i ʻole nā ​​​​wai ʻē aʻe mai ke komo ʻana i ka pepa.

I ka ʻoihana textile, hoʻohana ʻia ʻo CMC ma ke ʻano he mea nui, paʻi mānoanoa, a me ke kala ʻana i nā mea kōkua. Hoʻomaikaʻi ia i ka adhesion fiber, hoʻonui i ke komo ʻana o ka kala a me ka hoʻoponopono 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 rheology modifier i ka hoʻoili mineral. Hoʻomaikaʻi ia i ka hoʻonohonoho ʻana a me ka kānana ʻana i nā mea paʻa, hoʻemi i ka hoʻokaʻawale ʻana mai ka gangue lanahu, a mālama i ka viscosity suspension a me ka paʻa. Hoʻemi pū ʻo CMC i ka hopena o ke kaiapuni o ke kaʻina hana eli ma ka hoʻemi ʻana i ka hoʻohana ʻana i nā kemika a me ka wai.

i ka hopena

ʻO ka CMC kahi mea hoʻohui a waiwai nui e hōʻike ana i nā waiwai kūʻokoʻa a me ka viscosity ma muli o kāna ʻano kemika a me ka pilina me ka wai. ʻO kona solubility, hiki ke hana kiʻiʻoniʻoni, hoʻopaʻa a me nā waiwai adhesion e kūpono ia no nā noi like ʻole i ka meaʻai, lāʻau lapaʻau, pepa, textile a me nā ʻāpana mining. Hiki ke hoʻomalu ʻia ka viscosity o nā hoʻonā CMC e kekahi mau mea, e like me ka neʻe ʻana, DS, MW, ka mahana, a me ka pH, a hiki ke ʻike ʻia e kāna ʻano pseudoplastic a me ka shear-thinning. He hopena maikaʻi ko CMC i ka maikaʻi, kūpono a me ka hoʻomau ʻana o nā huahana a me nā kaʻina hana, e lilo ia i ʻāpana koʻikoʻi o ka ʻoihana hou.