ʻO ka hopena hoʻokomo ea o cellulose ether

ʻO nā cellulose ethers nā polymers synthetic i hana ʻia mai ka cellulose maoli a hoʻololi ʻia. ʻO ka cellulose ether kahi hua o ka cellulose maoli. ʻAʻole like me nā polymers synthetic, hoʻokumu ʻia ka cellulose ether production ma cellulose, ka mea maʻamau, kahi pūhui polymer maoli. Ma muli o ke ʻano kikoʻī o ke ʻano o ka cellulose kūlohelohe, ʻaʻole hiki i ka cellulose iā ia iho ke hana me nā mea etherizing. Eia nō naʻe, ma hope o ka mālama ʻana i nā solubilizers, ua luku ʻia nā paʻa hydrogen ikaika ma waena a i loko o nā kaulahao mole, a hoʻokuʻu ʻia ka hana o ka hui hydroxyl i loko o ka cellulose alkali me ka hiki ke hana, a ma hope o ka hopena o ka etherizing agent ua hoʻololi ʻia kahi hui OH i loko o kahi hui OR e loaʻa ai ka cellulose ether.

Loaʻa i ka cellulose ethers ka hopena e hoʻokomo i ka ea ma luna o nā mea sima hou i hui pū ʻia. Loaʻa nā pūʻulu hydrophilic (hydroxyl, ether) a me ka hydrophobic (methyl, glucose ring) nā pūʻulu cellulose a he mau surfactants me ka hana ʻili a no laila he hopena ea. ʻO ka hopena o ka ea o ka cellulose ether e hoʻopuka i ka hopena "pōleʻa", hiki ke hoʻomaikaʻi i ka hana hana o ka mea hou, e like me ka hoʻonui ʻana i ka plasticity a me ka maʻalahi o ka mortar i ka wā o ka hana, kahi mea e pono ai ka hoʻolaha ʻana o ka mortar; e hoʻomaikaʻi hoʻi ia i ka hua o ka pahū a hoʻemi i ke kumukūʻai o ka hana ʻana i ka 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.

Ma ke ʻano he surfactant, cellulose ether kekahi i ka wai a i ʻole ka lubricating hopena ma nā ʻāpana sima, a me ka hopena o ka ea e hoʻonui i ka wai o nā mea cementitious, akā ʻo kona hopena mānoanoa e hōʻemi i ka wai, a me ka hopena o ka cellulose ether i ka wai o ka wai. ʻO nā mea cementitious kahi hui o ka plasticizing a me nā hopena mānoanoa. ʻO ka ʻōlelo maʻamau, ke haʻahaʻa loa ka nui o ka cellulose ether, hōʻike nui ia i ka hopena o ka plasticization a i ʻole ka hōʻemi wai; ke kiʻekiʻe ka nui, piʻi wikiwiki ka hopena mānoanoa o ka cellulose ether, a hoʻomāhuahua ka hopena o ka ea, no laila e hōʻike ana i ka hopena mānoanoa a hoʻonui paha i ka pono wai.