ʻO Carboxymethyl cellulose (sodium carboxyme thyl cellulose, CMC) he huaʻai carboxymethylated o cellulose, ʻike ʻia hoʻi ʻo cellulose gum, a ʻo ia ka mea nui ionic cellulose gum.
ʻO ka CMC ka mea maʻamau he pūhui polimer anionic i hoʻomākaukau ʻia e ka hana ʻana i ka cellulose kūlohelohe me ka alkali caustic a me ka waikawa monochloroacetic.ʻO ke kaumaha molekala o ka pūhui ʻokoʻa mai kekahi mau tausani a hoʻokahi miliona.
No ka CMC ka hoʻololi ʻana o ka cellulose maoli, a ua kapa inoa ʻia e ka Food and Agriculture Organization o United Nations (FAO) a me ka World Health Organization (WHO) "cellulose hoʻololi ʻia".ʻO ke ʻano synthesis o ka sodium carboxymethyl cellulose i hana ʻia e German E. Jansen i ka makahiki 1918, a ua hoʻopaʻa ʻia i ka makahiki 1921 a ʻike ʻia i ka honua, a laila kūʻai ʻia ma ʻEulopa.
Hoʻohana nui ʻia ka CMC i ka petroleum, geological, kemika i kēlā me kēia lā, meaʻai, lāʻau lapaʻau a me nā ʻoihana ʻē aʻe, i kapa ʻia ʻo "industrial monosodium glutamate".
※Nā waiwai o ka CMC
ʻO ka CMC kahi pauka keʻokeʻo a ʻulaʻula melemele paha, granular a fibrous paʻa.He mea kemika macromolecular hiki ke hoʻopaʻa i ka wai a pehu.Ke ʻōhū i ka wai, hiki iā ia ke hana i kahi kāmeʻa viscous akaka.ʻO ka pH o ka hoʻokuʻu wai he 6.5-8.5.ʻAʻole hiki ke hoʻoheheʻe ʻia ka mea i loko o nā mea hoʻoheheʻe organik e like me ka ethanol, ether, acetone a me chloroform.
Paʻa ka CMC paʻa i ka mālamalama a me ka mahana o ka lumi, a hiki ke mālama ʻia no ka manawa lōʻihi ma kahi maloʻo.ʻO CMC kahi ʻano cellulose ether, maʻamau i hana ʻia me nā linters pulupulu pōkole (cellulose content a hiki i 98%) a i ʻole pulp lāʻau, mālama ʻia me ka sodium hydroxide a laila hoʻopili ʻia me ka sodium monochloroacetate, ʻo ke kaumaha molecular o ka pūhui he 6400 (± 1000).ʻElua mau ʻano hoʻomākaukau: ke ʻano wai-lanahu a me ke ʻano solvent.Aia kekahi mau mea kanu ʻē aʻe i hoʻohana ʻia no ka hoʻomākaukau ʻana i ka CMC.
※Nā hiʻohiʻona a me nā noi
ʻAʻole wale ʻo CMC he mea hoʻopaʻa emulsification maikaʻi a me ka mānoanoa i nā noi meaʻai, akā loaʻa nō hoʻi ke kūpaʻa hau a me ka hoʻoheheʻe ʻana, a hiki ke hoʻomaikaʻi i ka ʻono o ka huahana a hoʻolōʻihi i ka manawa mālama.
I ka makahiki 1974, ua ʻae ka Food and Agriculture Organization o ka United Nations (FAO) a me ka World Health Organization (WHO) i ka hoʻohana ʻana i ka CMC maʻemaʻe i ka meaʻai ma hope o ka noiʻi a me nā hoʻāʻo koʻikoʻi.ʻO ka intake palekana (ADI) o ke kūlana honua he 25mg / kg ke kaumaha o ke kino / lā.
※Thickening a me ka emulsion paʻa
ʻO ka ʻai ʻana i ka CMC hiki ke emulsify a hoʻopaʻa i nā mea inu i loko o ka momona a me ka protein.ʻO kēia no ka lilo ʻana o CMC i colloid kūpaʻa akaka ma hope o ka hoʻoheheʻe ʻia ʻana i loko o ka wai, a lilo nā ʻāpana protein i mau ʻāpana me ka uku like ma lalo o ka pale o ka membrane colloidal, hiki ke hana i nā ʻāpana protein i kahi kūlana paʻa.Loaʻa iā ia kekahi hopena emulsifying, no laila hiki iā ia ke hōʻemi i ka ʻili o ka ʻili ma waena o ka momona a me ka wai i ka manawa like, i hiki ke hoʻopiha piha ʻia ka momona.
Hiki i ka CMC ke hoʻomaikaʻi i ka paʻa o ka huahana, no ka mea, i ka wā e haʻalele ai ka waiwai pH o ka huahana mai ka helu isoelectric o ka protein, hiki i ka sodium carboxymethyl cellulose ke hana i kahi ʻano hui me ka protein, hiki ke hoʻomaikaʻi i ka paʻa o ka huahana.
※E hoʻonui i ka nui
Hiki i ka hoʻohana ʻana i ka CMC i ka ice cream ke hoʻonui i ka pae hoʻonui o ka ice cream, hoʻomaikaʻi i ka wikiwiki hoʻoheheʻe, hāʻawi i kahi ʻano maikaʻi a me ka ʻono, a mālama i ka nui a me ka ulu ʻana o nā kristal hau i ka wā o ka lawe ʻana a me ka mālama ʻana.ʻO ka nui i hoʻohana ʻia he 0.5% o ka huina Proportioned hoʻohui.
ʻO kēia no ka mea he maikaʻi ka mālama ʻana o ka wai a me ka hoʻopuehu ʻana o CMC, a hui pū ʻia nā ʻāpana protein, nā momona momona, a me nā mole wai i loko o ka colloid e hana i kahi ʻōnaehana paʻa a paʻa.
※Hydrophilicity a me Rehydration
Hoʻohana maʻamau kēia waiwai hana o CMC i ka hana ʻana i ka palaoa, hiki ke hana i ka ʻaʻahu honeycomb, hoʻonui i ka leo, hoʻemi i nā kulu, a loaʻa pū kekahi i ka hopena o ka mālama ʻana i ka wela a me ka hou;ʻO nā noodles i hoʻohui ʻia me CMC he hiki ke paʻa wai maikaʻi, ke kūpaʻa kuke, a me ka ʻono maikaʻi.
Hoʻoholo ʻia kēia e ka molecular structure o CMC, ʻo ia ka cellulose derivative a he nui nā hui hydrophilic i ke kaulahao mole: -OH pūʻulu, -COONa pūʻulu, no laila ʻoi aku ka maikaʻi o ka hydrophilicity CMC ma mua o ka cellulose a me ka paʻa wai.
※Gelation
Thixotropic CMC 'o ia ho'i, loa'a i nā kaulahao macromolecular ka nui o ka launa pū 'ana a me ka mana'o e hana i 'ekolu-dimensional structure.Ma hope o ka hoʻokumuʻiaʻana o ka hoʻolālāʻekolu, piʻi ka viscosity o ka hopena, a ma hope o ka hakiʻana o keʻanoʻekolu, e emi iho ka viscosity.ʻO ke ʻano thixotropy ʻo ia ka loli ʻana o ka viscosity ma muli o ka manawa.
He koʻikoʻi ko Thixotropic CMC i ka ʻōnaehana gelling a hiki ke hoʻohana ʻia e hana i ka jelly, jam a me nā meaʻai ʻē aʻe.
Hiki ke hoʻohana ʻia e like me ka clarifier, foam stabilizer, hoʻonui i ka waha
Hiki ke hoʻohana ʻia ka CMC i ka hana ʻana i ka waina i mea e ʻoi aku ka momona o ka ʻono a me ka momona me kahi ʻono lōʻihi;hiki ke hoʻohana ʻia e like me ka foam stabilizer i ka hana pia e hoʻonui i ka momona a lōʻihi a hoʻomaikaʻi i ka ʻono.
ʻO CMC kahi ʻano polyelectrolyte, hiki ke komo i nā ʻano like ʻole i ka waina e mālama ai i ke koena o ke kino waina.I ka manawa like, hui pū me nā kristal i hana ʻia, hoʻololi i ke ʻano o nā kristal, hoʻololi i nā kūlana o ka noho ʻana o nā kristal i loko o ka waina, a me ka hoʻoulu ʻana i ka ua.ʻO ka hui ʻana o nā mea.
Ka manawa hoʻouna: Dec-03-2022