Ingaruka zo gukururaeteri ya selulosebiterwa na: urwego rwa polymerization ya etha ya selulosi, ubwinshi bw'umuti, igipimo cyo gukata, ubushyuhe n'ibindi. Imiterere ya gelling y'umuti ni umwihariko wa alkyl cellulose n'ibikomoka kuri yo byahinduwe. Imiterere ya gelation ifitanye isano n'urwego rwo gusimbuza, ubwinshi bw'umuti n'inyongera. Ku bikomoka kuri hydroxyalkyl byahinduwe, imiterere ya gel ifitanye isano n'urwego rwo guhindura hydroxyalkyl. Ku bikomoka kuri viscosity bike MC na HPMC, umuti wa 10%-15% urashobora gutegurwa, viscosity iri hagati MC na HPMC bishobora gutegurwa 5%-10%, naho viscosity iri hejuru MC na HPMC zishobora gutegura 2%-3% gusa, kandi ubusanzwe ibyiciro bya viscosity bya etha ya selulosi nabyo bishyirwa mu byiciro bya 1%-2%.
Eteri ya cellulose ifite uburemere bwinshi ifite ubushobozi bwo gukuba cyane, kandi polymer zifite uburemere butandukanye bwa molekile zifite ubushobozi bwo gukuba butandukanye mu gisubizo kimwe. Uburemere bw'ibipimo bushobora kugerwaho gusa iyo wongeyeho eteri ya cellulose ifite uburemere buke bwa molekile. Uburemere bwayo ntibushingira cyane ku gipimo cyo gukata, kandi uburemere bwinshi bugera ku buremere bw'ibipimo, bisaba kongerwamo bike, kandi uburemere bushingiye ku buremere bw'ibipimo. Kubwibyo, kugira ngo habeho uburinganire runaka, ingano runaka ya eteri ya cellulose (ubwinshi bw'igisubizo) n'uburemere bw'igisubizo bigomba kwemezwa. Ubushyuhe bwa gel bw'igisubizo nabwo buragabanuka ku murongo uhuye n'ubwiyongere bw'ubwinshi bw'igisubizo, na gel ku bushyuhe bw'icyumba nyuma yo kugera ku buremere runaka. Uburemere bwa HPMC bwa gelling buri hejuru cyane ku bushyuhe bw'icyumba.
Guhuza ibintu bishobora kandi guhindurwa binyuze mu guhitamo ingano y'uduce duto no guhitamo eteri za selulose zifite urwego rutandukanye rwo guhinduka. Icyo bita guhindura ni ukwinjiza urugero runaka rwo gusimbuza amatsinda ya hydroxyalkyl ku miterere y'amagufwa ya MC. Mu guhindura agaciro k'isimbuza ry'ibintu bibiri, ni ukuvuga agaciro k'isimbuza ry'ibintu bya DS na MS by'amatsinda ya methoxy na hydroxyalkyl dukunze kuvuga. Ibisabwa bitandukanye ku mikorere ya eteri ya selulose bishobora kuboneka binyuze mu guhindura agaciro k'isimbuza ry'ibintu bibiri.
Umuti w’amazi wa cellulose ether ufite ubushyuhe bwinshi ufite thixotropy nyinshi, ari nabyo biranga cellulose ether. Ubusanzwe, imiterere y’amazi ya MC polymers ifite ubushyuhe bwa pseudoplastic na non-thixotropic munsi y’ubushyuhe bwa gel, ariko imiterere y’amazi ya Newtonian ku gipimo gito cyo gukata. Ubushyuhe bwa pseudoplasticity buriyongera bitewe n’uburemere bwa molekile cyangwa ubunini bwa cellulose ether, hatitawe ku bwoko bw’umusimbura n’urwego rwo gusimbuza. Kubwibyo, cellulose ethers zo mu rwego rumwe rwa viscosity, uko byaba bimeze kose, MC, HPMC, HEMC, zizahora zigaragaza imiterere imwe ya rheological igihe cyose ubushyuhe n’ubushyuhe biguma bihoraho. Gels z’imiterere zibaho iyo ubushyuhe buzamuwe, kandi habaho urujya n’uruza rwa thixotropic rwinshi. Ethers za cellulose ethers zifite ubushyuhe bwinshi n’ubushyuhe buke zigaragaza thixotropy ndetse no munsi y’ubushyuhe bwa gel. Iyi miterere ni ingirakamaro cyane mu guhindura uburyo bwo kugorora no kumanuka mu bwubatsi bwa mortier.
Aha hagomba gusobanurwa ko uko ubushyuhe bwaeteri ya selulose, niko amazi agumana neza, ariko uko viscosity irushaho kuba nyinshi, niko uburemere bwa molekile ya cellulose ether bwiyongera, kandi bikanagabanuka mu gushonga kwayo, bigira ingaruka mbi ku bwinshi bwa mortical n'imikorere y'ubwubatsi. Uko viscosity irushaho kuba nyinshi, niko ingaruka zo gukomera kuri mortical zigaragara cyane, ariko ntabwo bingana neza. Viscosity imwe iri hagati n'iyo hasi, ariko cellulose ether yahinduwe igira imikorere myiza mu kunoza imbaraga z'imiterere ya mortical itose. Uko viscosity igenda yiyongera, viscosity ikomeza gufata amazi ya cellulose ether.
Igihe cyo kohereza: 28 Mata 2024