Ka hopena hoʻokomo ea o ka cellulose ether

ʻO nā cellulose ethers he mau polymers synthetic i hana ʻia mai ka cellulose kūlohelohe a hoʻololi ʻia me ke kemika. ʻO ka cellulose ether kahi derivative o ka cellulose kūlohelohe. ʻAʻole like me nā polymers synthetic, ua hoʻokumu ʻia ka hana ʻana o ka cellulose ether ma ka cellulose, ka mea kumu loa, kahi hui polymer kūlohelohe. Ma muli o ke ʻano kikoʻī o ke ʻano cellulose kūlohelohe, ʻaʻohe hiki i ka cellulose ponoʻī ke hana me nā mea etherizing. Eia naʻe, ma hope o ka mālama ʻana i nā solubilizers, ua luku ʻia nā pilina hydrogen ikaika ma waena a ma loko o nā kaulahao molekala, a ua hoʻokuʻu ʻia ka hana hui hydroxyl i loko o ka cellulose alkali me ka hiki ke hana, a ma hope o ka hana ʻana o ka mea etherizing ua hoʻololi ʻia kahi hui OH i kahi hui OR e loaʻa ai ka cellulose ether.

Loaʻa i nā ethers cellulose ka hopena ea-entraining maopopo i nā mea sima i hui hou ʻia. Loaʻa i nā ethers cellulose nā hui hydrophilic (hydroxyl, ether) a me hydrophobic (methyl, glucose ring) a he mau surfactants me ka hana ʻili a no laila he hopena ea-entraining. ʻO ka hopena ea-entraining o ka cellulose ether e hana i ka hopena "pōpō", hiki ke hoʻomaikaʻi i ka hana hana o ka mea hou, e like me ka hoʻonui ʻana i ka plasticity a me ka laumania o ka mortar i ka wā o ka hana, he mea maikaʻi ia no ka hoʻolaha ʻana o ka mortar; e hoʻomaikaʻi pū ia i ka hua o ka mortar a hoʻemi i ke kumukūʻai o ka hana mortar; akā naʻe, e hoʻonui ia i ka porosity o ka mea paʻakikī a hoʻemi i kona ikaika a me ka modulus elastic, a pēlā aku. Nā waiwai mechanical.

Ma ke ʻano he surfactant, loaʻa pū ka cellulose ether i ka hopena pulu a lubricating paha i nā ʻāpana sima, kahi e hui pū ai me kona hopena ea-entraining e hoʻonui ai i ka wai o nā mea sima, akā ʻo kona hopena mānoanoa e hōʻemi ana i ka wai, a ʻo ka hopena o ka cellulose ether ma ka wai o nā mea sima he hui pū ʻana o nā hopena plasticizing a me ka mānoanoa. Ma ke ʻano laulā, i ka wā e haʻahaʻa loa ai ka nui o ka cellulose ether, hōʻike nui ia i ka hopena o ka plasticization a i ʻole ka hōʻemi wai; i ka wā e kiʻekiʻe ai ka nui, piʻi koke ka hopena mānoanoa o ka cellulose ether, a ʻo kona hopena ea-entraining e hoʻomaʻalili, no laila e hōʻike ana i ka hopena mānoanoa a hoʻonui paha i ka pono wai.