I-Hydroxypropyl methylcellulose (i-HPMC, i-Hydroxypropyl Methylcellulose) i-polymer compound esetyenziswa ngokuqhelekileyo kwi-adhesives, izinto zokwakha kunye namalungiselelo amayeza. Ngenxa yolwakhiwo lweekhemikhali ezizodwa kunye neempawu, i-HPMC iya isetyenziswa kakhulu kwi-adhesives, ngakumbi ekuphuculeni amandla ebhondi.
Iipropati zeMichiza kunye nesakhiwo se-HPMC
I-HPMC yi-derivative ye-cellulose, eyenziwa ngokutshintshela amaqela e-hydroxyl kwi-molecule ye-cellulose kunye ne-methoxy (-OCH3) kunye ne-hydroxypropoxy (-OCH2CH (OH) CH3) amaqela. Ulwakhiwo olukhethekileyo lwe-HPMC lunika iintlobo ngeentlobo zeepropathi ezigqwesileyo, ezifana nokunyibilika kwamanzi, ukunyibilika kwe-thermal, ukwenza ifilimu kunye neempawu ezityebileyo. Ezi zakhiwo zibeka isiseko sokusetyenziswa kwayo kwi-adhesives, ngokukodwa kwi-adhesives yokwakha kunye nezoshishino.
Indlela yokusebenza ye-HPMC kwi-adhesives
Isiphumo sokujiya i-HPMC inesiphumo esihle kakhulu sokuqina kwaye inokunyusa kakhulu i-viscosity yezinto ezincamathelayo. Kwizinto ezincamathelayo, i-HPMC isebenza njenge-thickener, iphucula iipropathi ze-rheological ze-adhesive ngokwenza uthungelwano lweemolekyuli ze-long-chain kwisigaba solwelo. Oku kuqiniswa kunceda i-adhesive isasazeke ngokulinganayo ngexesha lesicelo, ukwandisa indawo yoqhagamshelwano phakathi kwezinto kwaye ngaloo ndlela kuphuculwe amandla ebhondi.
Ukugcinwa kwamanzi I-HPMC inamandla okugcina amanzi abalaseleyo, ngakumbi kwizinto zokwakha ezifana nokunamathiswa okusekwe kwisamente, ukugcina ukufuma ngexesha lenkqubo yokunyanga. Olu phawu luqinisekisa ukunyangwa okufanayo kwe-adhesive kwaye lugwema ukudibanisa okungalinganiyo okanye ukulahlekelwa kwamandla ngenxa yokulahlekelwa ngokukhawuleza kokufuma. Ukongezelela, iipropati zokugcina amanzi ze-HPMC zandisa ixesha elivulekileyo le-adhesive, okwenza imisebenzi yokwakha ibe yinto eguquguqukayo kwaye ngaloo ndlela iphucula umphumo wokugqibela wokubopha.
Iipropati zokwenza ifilimu Iipropati zokwenza ifilimu ye-HPMC nayo enye yezizathu ezibalulekileyo zokuphucula amandla okudibanisa. I-HPMC inokwenza ifilimu eshinyeneyo kumphezulu wezinto eziphathekayo, ezingagcini nje ukwandisa iimpawu zomatshini zokunamathela, kodwa zibonelela ngokuthintela amanzi kunye nokuxhathisa imichiza. Kwezinye izicelo ezikhethekileyo, ezifana ne-wood bonding okanye i-gluing yemveliso yephepha, umaleko wefilimu okhuselayo owenziwe yi-HPMC unokunceda ukuphucula amandla ebhondi kunye nokwandisa ubomi bobhondi.
I-HPMC eguqulwe ngokudibeneyo inokuphucula ukuhambelana kobuso phakathi kwe-adhesive kunye ne-substrate. Ngenxa yesakhiwo semolekyuli ye-polar ye-HPMC, inokuvelisa amandla aqinileyo ngokwasemzimbeni okanye ekhemikhali kunye nomphezulu wezinto ezahlukeneyo, ngakumbi kwi-substrates ene-polarity ephezulu (njengeglasi, i-ceramics, isinyithi, njl.njl.), i-HPMC inokuphucula ngokufanelekileyo i-Adhesion phakathi kokuncamathelisa. kunye ne-substrate. Olu hlengahlengiso lubalulekile ekuphuculeni amandla ebhondi.
Ukusetyenziswa kwe-HPMC kwiinkqubo ezahlukeneyo zokuncamathelisa
I-Adhesives esekelwe ngamanzi Kwizinto ezincamathelayo ezisekelwe emanzini, i-HPMC idlala indima ebalulekileyo njenge-thickener kunye ne-agent egcina amanzi. Inxalenye ephambili ye-adhesives esekelwe emanzini ngamanzi. Iimpawu zokugcina amanzi ze-HPMC zinokunceda ukunyanga okuncamathelayo ngcono kumphezulu we-substrate kunye nokwandisa amandla okudibanisa. Ukongezelela, iipropati zokwenza ifilimu ze-HPMC nazo zinegalelo ekomeleleni kwe-adhesives yamanzi.
I-HPMC encamathelayo esekwe kwisamente isetyenziswa kakhulu kwizincamathelisi ezisekwe kwisamente njengezinto zokuncamathelisa iithayile kunye nezinto zokutyabeka eludongeni. I-adhesives ye-cement-based adhesives idinga ukugcina umswakama othile ngexesha lenkqubo yokunyanga, kunye nokusebenza okugqwesileyo kokugcinwa kwamanzi kwe-HPMC iqinisekisa ukufana kwesamente ngexesha lenkqubo yokunyanga kwaye igweme ukuqhekeka okanye ukungonelanga kwamandla okubangelwa ukuguquka kwamanzi ngokukhawuleza. Ukongeza, i-HPMC iphucula ukusebenza kolwakhiwo lokuncamathelisa, ukwenza ulwakhiwo lube lula ngakumbi kwaye lugudileyo, kwaye luphucule ngakumbi amandla okubopha.
Ipeyinti yeLatex kunye nezinye iingubo zokwakha Kwipeyinti yelatex kunye nezinye iingubo zokwakha, i-HPMC isetyenziswa njenge-thickener kunye ne-stabilizer ukuphucula ukufana kunye neempawu zokubambelela kwi-coating, iqinisekisa ukuba ukugquma kunokubambelela kangcono kumphezulu we-substrate, ngaloo ndlela Ukuphucula ipeyinti. ukuqina kunye neempawu zokukhusela amanzi. Le propati ibaluleke kakhulu kumgangatho kunye namandla ebhondi yeengubo zezakhiwo.
Izinto ezichaphazela ukusebenza kwe-HPMC
Iqondo lokuTshintsha Iqondo lokutshintshwa kwe-HPMC (oko kukuthi, umyinge we-methoxy kunye namaqela e-hydroxypropoxy afakwe endaweni ye-molecule) ichaphazela ngokuthe ngqo ukusebenza kwayo kwizinto zokuncamathelisa. Xa sithetha ngokubanzi, iqondo eliphezulu lokutshintsha, kokukhona ukugcinwa kwamanzi kunye neepropathi zokwenza ifilim ze-HPMC, ngoko kwandisa ukomelela kokuncamathelisa. Ke ngoko, ukhetho olunengqiqo lwenqanaba lokutshintshwa kwe-HPMC lunokwandisa ukusebenza kwe-adhesive.
Ubunzima beMolekyuli Ubunzima bemolekyuli ye-HPMC inefuthe elithe ngqo kwisiphumo sayo sokuqina kunye neempawu zokwenza ifilimu. I-HPMC enobunzima obukhulu bemolekyuli inefuthe elinamandla lokutyeba, ngelixa i-HPMC enobunzima obuncinci bemolekyuli inyibilika ngakumbi kwaye ilungele ukusetyenziswa kwimixube encamathelayo efuna ukunyangwa ngokukhawuleza. Ke ngoko, ukukhetha i-HPMC enobunzima obufanelekileyo bemolekyuli ngokweemfuno ezithile zokuncamathelisa kubaluleke kakhulu ukuphucula amandla okubopha.
Imiba yokusingqongileyo HPMC ibonisa iipropati ezahlukeneyo phantsi kweemeko ezahlukeneyo zokusingqongileyo. Umzekelo, ukutyeba kunye nokugcinwa kwamanzi iipropathi ze-HPMC zinokuchaphazeleka kwiindawo zobushushu obuphezulu okanye obuphantsi. Ke ngoko, ifomula kunye nesixa sokusetyenziswa kwe-HPMC zihlengahlengiswa kwiindawo ezahlukeneyo zokusetyenziswa ukuze kuqinisekiswe ukuba i-adhesive igcina amandla okubopha okuphezulu phantsi kweemeko ezahlukeneyo.
I-HPMC idlala indima ebalulekileyo ekuphuculeni amandla e-adhesive bond. Ngeendlela zayo ezahlukeneyo ezifana nokuqina, ukugcinwa kwamanzi, ukubunjwa kwefilimu kunye nokuguqulwa kwe-interfacial modified, i-HPMC inokuphucula ngokufanelekileyo ukusebenza kwe-adhesives, ngokukodwa kwi-adhesives yamanzi, i-samente-based adhesives kunye neengubo zokwakha. Njengoko itekhnoloji yokuncamathelisa iqhubeka nokuphuhlisa, indima ye-HPMC ekuphuculeni amandla ebhondi iya kubaluleka kakhulu.
Ixesha lokuposa: Sep-09-2024