Mphamvu ya DS pa carboxymethyl cellulose Ubwino

Carboxymethyl cellulose (CMC) ndi chochokera m'madzi chosungunuka cha cellulose chomwe chimagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikiza chakudya, mankhwala, komanso chisamaliro chamunthu. Digiri ya m'malo (DS) ndi gawo lofunikira lomwe limakhudza zinthu za CMC. Munkhaniyi, tikambirana momwe DS imakhudzira mtundu wa carboxymethyl cellulose.

Choyamba, ndikofunikira kumvetsetsa kuti kuchuluka kwa m'malo ndi chiyani. Mlingo wolowa m'malo umatanthawuza kuchuluka kwa magulu a carboxymethyl pagawo la shuga mu unyolo wa cellulose. CMC amapangidwa ndi anachita mapadi ndi sodium monochloroacetate ndi sodium hydroxide. Pakuchita izi, magulu a hydroxyl pa unyolo wa cellulose amasinthidwa ndi magulu a carboxymethyl. Mlingo wa m'malo akhoza lizilamuliridwa ndi mosiyanasiyana mmene zinthu, monga ndende ya sodium hydroxide ndi sodium monochloroacetate, anachita nthawi, ndi kutentha.

DS ya CMC imakhudza momwe thupi lake limakhalira komanso mankhwala, monga kusungunuka kwake, kukhuthala kwake, komanso kukhazikika kwamafuta. CMC yokhala ndi DS yotsika ili ndi digiri yapamwamba ya crystallinity ndipo imakhala yosasungunuka m'madzi kuposa CMC yokhala ndi DS yayikulu. Izi zili choncho chifukwa magulu a carboxymethyl mu CMC omwe ali ndi DS otsika amakhala pamwamba pa unyolo wa cellulose, zomwe zimachepetsa kusungunuka kwake m'madzi. Mosiyana ndi izi, CMC yokhala ndi DS yayikulu imakhala ndi mawonekedwe aamorphous ndipo imakhala yosungunuka m'madzi kuposa CMC yokhala ndi DS yochepa.

Kukhuthala kwa CMC kumakhudzidwanso ndi DS. CMC yokhala ndi DS yotsika imakhala ndi kukhuthala kochepa kuposa CMC yokhala ndi DS yayikulu. Izi ndichifukwa choti magulu a carboxymethyl mu CMC omwe ali ndi DS yotsika amakhala motalikirana, zomwe zimachepetsa kulumikizana pakati pa maunyolo a cellulose ndikuchepetsa kukhuthala. Mosiyana ndi izi, CMC yokhala ndi DS yayikulu imakhala ndi kukhuthala kwakukulu chifukwa magulu a carboxymethyl amakhala oyandikana kwambiri, zomwe zimawonjezera kuyanjana pakati pa maunyolo a cellulose ndikukweza kukhuthala.

Kuphatikiza pa mawonekedwe ake, DS ya CMC imakhudzanso mankhwala ake. CMC yokhala ndi DS yotsika imakhala yosakhazikika pakatentha kwambiri komanso pamtengo wa pH kuposa CMC yokhala ndi DS yayikulu. Izi zili choncho chifukwa magulu a carboxymethyl mu CMC omwe ali ndi DS otsika amatha kutenga hydrolysis ndipo amatha kusweka pansi pazovuta. Mosiyana ndi izi, CMC yokhala ndi DS yayikulu imakhala yokhazikika pakatentha kwambiri komanso pamitengo ya pH chifukwa magulu a carboxymethyl amakhala omangika kwambiri ku unyolo wa cellulose.