Carboxymethylcellulose (CMC) ndi chowonjezera chogwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana monga chakudya, mankhwala, kupanga mapepala, nsalu, ndi migodi. Amachokera ku cellulose yachilengedwe, yomwe imakhala yochuluka muzomera ndi zinthu zina zamoyo. CMC ndi polima wosungunuka m'madzi wokhala ndi zinthu zapadera kuphatikiza kukhuthala, hydration, adhesion and adhesion.
Zithunzi za CMC
CMC ndi chochokera ku cellulose chomwe chimasinthidwa mwamakina poyambitsa magulu a carboxymethyl mu kapangidwe kake. Kusintha kumeneku kumawonjezera kusungunuka ndi hydrophilicity ya cellulose, potero kuwongolera magwiridwe antchito. Makhalidwe a CMC amadalira mlingo wake wolowa m'malo (DS) ndi kulemera kwa maselo (MW). DS imatanthauzidwa ngati kuchuluka kwa magulu a carboxymethyl pagawo la shuga pa cellulose msana, pomwe MW amawonetsa kukula ndi kugawa kwa maunyolo a polima.
Chimodzi mwazinthu zazikulu za CMC ndikusungunuka kwake m'madzi. CMC imasungunuka mosavuta m'madzi, ndikupanga yankho la viscous ndi pseudoplastic properties. Khalidwe la rheologicalli limabwera chifukwa cha kuyanjana kwa ma intermolecular pakati pa mamolekyu a CMC, zomwe zimapangitsa kuchepa kwa mamasukidwe akayendedwe akumeta ubweya. Mawonekedwe a pseudoplastic a mayankho a CMC amawapangitsa kukhala oyenera kugwiritsa ntchito zosiyanasiyana monga thickeners, stabilizers, ndi suspending agents.
Chikhalidwe china chofunikira cha CMC ndi luso lake lopanga mafilimu. Mayankho a CMC amatha kuponyedwa m'mafilimu omwe ali ndi zida zabwino zamakina, kuwonekera, komanso kusinthasintha. Mafilimuwa angagwiritsidwe ntchito ngati zokutira, laminates ndi zipangizo zomangira.
Kuphatikiza apo, CMC ili ndi zomangira zabwino komanso zomangira. Zimapanga mgwirizano wolimba ndi malo osiyanasiyana, kuphatikizapo matabwa, zitsulo, pulasitiki ndi nsalu. Katunduyu wapangitsa kuti CMC igwiritse ntchito popanga zokutira, zomatira ndi inki.
Kukhuthala kwa CMC
Kukhuthala kwa mayankho a CMC kumadalira zinthu zingapo monga ndende, DS, MW, kutentha, ndi pH. Nthawi zambiri, mayankho a CMC amawonetsa ma viscosities apamwamba kwambiri, DS, ndi MW. Viscosity imakulanso ndi kuchepa kwa kutentha ndi pH.
Kukhuthala kwa mayankho a CMC kumayendetsedwa ndi kuyanjana pakati pa maunyolo a polima ndi mamolekyu osungunulira mu yankho. Mamolekyu a CMC amalumikizana ndi mamolekyu amadzi kudzera mu zomangira za haidrojeni, kupanga chipolopolo cha hydration mozungulira maunyolo a polima. Chigoba ichi cha hydration chimachepetsa kusuntha kwa maunyolo a polima, potero kumawonjezera kukhuthala kwa yankho.
Makhalidwe a rheological a mayankho a CMC amadziwika ndi mafunde othamanga, omwe amafotokozera mgwirizano pakati pa kumeta ubweya wa ubweya ndi kumeta ubweya wa yankho. Mayankho a CMC amawonetsa machitidwe osakhala a Newtonian otaya, zomwe zikutanthauza kuti kukhuthala kwawo kumasintha ndi shear rate. Pamitengo yotsika yometa ubweya, kukhuthala kwa mayankho a CMC ndikwapamwamba, pomwe pamitengo yometa ubweya wambiri, kukhuthala kumachepa. Kumeta ubweya wa ubweya uku kumachitika chifukwa cha maunyolo a polima omwe amalumikizana ndi kutambasula pansi pa kumeta ubweya wa ubweya, zomwe zimapangitsa kuti mphamvu za intermolecular zichepetse pakati pa maunyolo ndi kuchepa kwa viscosity.
Kugwiritsa ntchito CMC
CMC imagwiritsidwa ntchito kwambiri m'magawo osiyanasiyana chifukwa cha mawonekedwe ake apadera komanso machitidwe a rheological. M'makampani azakudya, CMC imagwiritsidwa ntchito ngati thickener, stabilizer, emulsifier and texture improver. Amawonjezedwa ku zakudya monga ayisikilimu, zakumwa, sosi ndi zinthu zophikidwa kuti zisinthe mawonekedwe ake, kusasinthika komanso moyo wa alumali. CMC imalepheretsanso mapangidwe a ayezi muzakudya zachisanu, zomwe zimapangitsa kuti pakhale chinthu chosalala, chokoma.
M'makampani opanga mankhwala, CMC imagwiritsidwa ntchito ngati chomangira, chosokoneza komanso chowongolera chotulutsa pamapangidwe a piritsi. Kupititsa patsogolo compressibility ndi fluidity wa ufa ndi kuonetsetsa yunifolomu ndi bata la mapiritsi. Chifukwa cha mucoadhesive ndi bioadhesive katundu, CMC amagwiritsidwanso ntchito ngati excipient mu ophthalmic, m'mphuno, ndi pakamwa formulations.
Pamakampani opanga mapepala, CMC imagwiritsidwa ntchito ngati chowonjezera chonyowa, chomangira chomangira komanso chosindikizira. Imawongolera kusungidwa kwa zamkati ndi ngalande, imawonjezera mphamvu zamapepala ndi kachulukidwe, ndipo imapereka malo osalala komanso owala. CMC imagwiranso ntchito ngati chotchinga madzi ndi mafuta, kuteteza inki kapena zakumwa zina kuti zisalowe m'mapepala.
M'makampani opanga nsalu, CMC imagwiritsidwa ntchito ngati saizi, makina osindikizira, komanso utoto wothandizira. Imawongolera kumamatira kwa ulusi, kumawonjezera kulowa kwamtundu ndi kukonza, komanso kumachepetsa mikangano ndi makwinya. CMC imaperekanso kufewa ndi kuuma kwa nsalu, kutengera DS ndi MW wa polima.
M'makampani amigodi, CMC imagwiritsidwa ntchito ngati flocculant, inhibitor ndi rheology modifier pakukonza mchere. Imawongolera kukhazikika ndi kusefera kwa zolimba, imachepetsa kulekana ndi malasha gangue, ndikuwongolera kuyimitsidwa kukhuthala ndi kukhazikika. CMC imachepetsanso kukhudzidwa kwa chilengedwe cha migodi pochepetsa kugwiritsa ntchito mankhwala oopsa ndi madzi.
Pomaliza
CMC ndi chowonjezera chosunthika komanso chamtengo wapatali chomwe chimawonetsa zinthu zapadera komanso kukhuthala chifukwa cha kapangidwe kake kamankhwala komanso kulumikizana ndi madzi. Kusungunuka kwake, luso lopanga mafilimu, kumanga ndi kumamatira kumapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito zosiyanasiyana m'magulu a chakudya, mankhwala, mapepala, nsalu ndi migodi. Kukhuthala kwa mayankho a CMC kumatha kuwongoleredwa ndi zinthu zingapo, monga ndende, DS, MW, kutentha, ndi pH, ndipo zitha kudziwika ndi pseudoplastic ndi kumeta ubweya wa ubweya. CMC imakhala ndi zotsatira zabwino pazabwino, kuchita bwino komanso kukhazikika kwazinthu ndi njira, zomwe zimapangitsa kuti ikhale gawo lofunikira pamakampani amakono.
Nthawi yotumiza: Sep-25-2023